Download
Share
Print this page
Subaru Legasy 2001 Service Manual
  1. Manuals
  2. Brands
  3. Subaru Manuals
  4. Automobile
  5. Legasy 2001
  6. Service manual
Subaru Legasy 2001 Service Manual

Subaru Legasy 2001 Service Manual

Supplement for 6 cylinder engine model
Hide thumbs

Advertisement

Quick Links

Download this manual
2001 LEGACY SERVICE MANUAL
SUPPLEMENT FOR 6 CYLINDER
ENGINE MODEL
This service manual has been prepared to provide
SUBARU service personnel with the necessary infor-
mation and data for the correct maintenance and
repair of SUBARU vehicles.
This manual includes the procedures for maintenance,
disassembling, reassembling, inspection and adjust-
ment of components and diagnostics for guidance of
experienced mechanics.
Please peruse and utilize this manual fully to ensure
complete repair work for satisfying our customers by
keeping their vehicle in optimum condition. When
replacement of parts during repair work is needed, be
sure to use SUBARU genuine parts.
All information, illustration and specifications con-
tained in this manual are based on the latest product
information available at the time of publication
approval.
FUJI HEAVY INDUSTRIES LTD.
QUICK REFERENCE INDEX
G2281GE

Advertisement

loading
Need help?

Need help?

Do you have a question about the Legasy 2001 and is the answer not in the manual?

Questions and answers

Related Manuals for Subaru Legasy 2001

Summary of Contents for Subaru Legasy 2001

  • Page 1 SUPPLEMENT FOR 6 CYLINDER ENGINE MODEL This service manual has been prepared to provide SUBARU service personnel with the necessary infor- mation and data for the correct maintenance and repair of SUBARU vehicles. This manual includes the procedures for maintenance,...
  • Page 2 2001 LEGACY SERVICE MANUAL QUICK REFERENCE INDEX SUPPLEMENT FOR 6 CYLINDER ENGINE MODEL G2281GE...
  • Page 3 Engine Control Module (ECM) I/O Signal..........27 Engine Condition Data ................32 Transmission Control Module (TCM) I/O Signal ........33 Data Link Connector .................38 OBD-II General Scan Tool ................39 Subaru Select Monitor................41 Read Diagnostic Trouble Code ..............48 Inspection Mode ..................49 Clear Memory Mode..................52 Compulsory Valve Operation Check Mode..........53 Engine Malfunction Indicator Lamp (MIL) ..........55...
  • Page 4 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) 18. Diagnostic Procedure with Diagnostic Trouble Code (DTC) S048521 A: DTC P0031 — BANK #1 AND SENSOR #1 OXYGEN (A/F) SENSOR (FRONT RH) HEATER CIRCUIT LOW INPUT — S048521H21 ¼ DTC DETECTING CONDITION: ¼...
  • Page 5 Repair poor con- Go to step 4. 1) Start engine tact in connector. 2) Read data of front oxygen (A/F) sensor NOTE: heater current using Subaru Select Monitor or In this case, OBD-II general scan tool. repair the follow- NOTE: ing: ¼...
  • Page 6 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK POWER SUPPLY TO FRONT OXY- Is the voltage more than 10 Go to step 9. Repair power sup- GEN (A/F) SENSOR. ply line. 1) Turn ignition switch to OFF. NOTE: 2) Disconnect connector from front oxygen In this case,...
  • Page 7 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) MEMO: EN(H6)-99...
  • Page 8 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) B: DTC P0032 — BANK #1 AND SENSOR #1 OXYGEN (A/F) SENSOR (FRONT RH) HEATER CIRCUIT HIGH INPUT — S048521H22 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 9 ECM and front oxygen (A/F) sensor connector. 3) Turn ignition switch to ON. 4) Read data of front oxygen (A/F) sensor heater current using Subaru Select Monitor or the OBD-II general scan tool. NOTE: ¼ Subaru Select Monitor For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”.
  • Page 10 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) C: DTC P0037 — BANK #1 AND SENSOR #2 OXYGEN SENSOR (REAR) HEATER CIRCUIT LOW INPUT — S048521H23 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 11 Repair connector. Go to step 3. 1) Start engine. NOTE: 2) Read data of rear oxygen sensor heater In this case, current using Subaru Select Monitor or OBD-II repair the follow- general scan tool. ing: ¼ Poor contact in NOTE: ¼...
  • Page 12 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK POWER SUPPLY TO REAR OXY- Is the voltage more than 10 Go to step 7. Repair power sup- GEN SENSOR. ply line. 1) Turn ignition switch to OFF. NOTE: 2) Disconnect connector from rear oxygen In this case,...
  • Page 13 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) MEMO: EN(H6)-105...
  • Page 14 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) D: DTC P0038 — BANK #1 AND SENSOR #2 OXYGEN SENSOR (REAR) HEATER CIRCUIT HIGH INPUT — S048521H24 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 15 Module.> nector. 3) Turn ignition switch to ON. 4) Read data of rear oxygen sensor heater current using Subaru Select Monitor or the OBD-II general scan tool. NOTE: ¼ Subaru Select Monitor For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”.
  • Page 16 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) E: DTC P0051 — BANK #2 AND SENSOR #1 OXYGEN (A/F) SENSOR (FRONT LH) HEATER CIRCUIT LOW INPUT — S048521H25 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 17 Repair poor con- Go to step 4. 1) Start engine tact in connector. 2) Read data of front oxygen (A/F) sensor NOTE: heater current using Subaru Select Monitor or In this case, OBD-II general scan tool. repair the follow- NOTE: ing: ¼...
  • Page 18 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK POWER SUPPLY TO FRONT OXY- Is the voltage more than 10 Go to step 9. Repair power sup- GEN (A/F) SENSOR. ply line. 1) Turn ignition switch to OFF. NOTE: 2) Disconnect connector from front oxygen In this case,...
  • Page 19 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) MEMO: EN(H6)-111...
  • Page 20 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) F: DTC P0052 — BANK #2 AND SENSOR #1 OXYGEN (A/F) SENSOR (FRONT LH) HEATER CIRCUIT HIGH INPUT — S048521H26 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 21 ECM and front oxygen (A/F) sensor connector. 3) Turn ignition switch to ON. 4) Read data of front oxygen (A/F) sensor heater current using Subaru Select Monitor or the OBD-II general scan tool. NOTE: ¼ Subaru Select Monitor For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”.
  • Page 22 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) G: DTC P0106 — INTAKE MANIFOLD PRESSURE SENSOR CIRCUIT RANGE/ PERFORMANCE PROBLEM — S048521F00 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM ¼ Erroneous idling CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 23 P0121 — ¼ Subaru Select Monitor THROTTLE For detailed operation procedure, refer to the POSITION SEN- “LED OPERATION MODE FOR ENGINE”. SOR CIRCUIT <Ref. to EN(H6)-40 Subaru Select Monitor.> RANGE/ PERFORMANCE PROBLEM (HIGH INPUT) —, Diag- nostic Procedure with Diagnostic Trouble Code (DTC).>...
  • Page 24 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) H: DTC P0107 — INTAKE MANIFOLD PRESSURE SENSOR CIRCUIT LOW INPUT — S048521F01 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 25 Go to step 2. 1) Start engine. kPa (13 mmHg, 0.51 2) Read the data of intake manifold absolute inHg)? pressure signal using Subaru Select Monitor or OBD-II general scan tool. NOTE: ¼ Subaru Select Monitor For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”.
  • Page 26 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN ECM AND Is the resistance less than Go to step 9. Repair open cir- 1 Ω? INTAKE MANIFOLD PRESSURE SENSOR cuit in harness CONNECTOR. between ECM 1) Turn ignition switch to OFF.
  • Page 27 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) MEMO: EN(H6)-119...
  • Page 28 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) I: DTC P0108 — INTAKE MANIFOLD PRESSURE SENSOR CIRCUIT HIGH INPUT — S048521F02 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 29 Go to step 2. 1) Start engine. kPa (975 mmHg, 38.39 2) Read the data of intake manifold absolute inHg)? pressure signal using Subaru Select Monitor or OBD-II general scan tool. NOTE: ¼ Subaru Select Monitor For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”.
  • Page 30 Repair battery Replace intake PRESSURE SENSOR CONNECTOR. kPa (975 mmHg, 38.39 short circuit in manifold pressure 1) Turn ignition switch to OFF and Subaru inHg)? harness between sensor. <Ref. to Select Monitor or the OBD-II general scan ECM and intake FU(H6)-34, Intake tool switch to OFF.
  • Page 31 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) MEMO: EN(H6)-123...
  • Page 32 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) J: DTC P0111 — INTAKE AIR TEMPERATURE SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM — S048521B14 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼ Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 33 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Replace intake air Monitor or OBD-II general P0112 or P0113 temperature sen- scan tool indicate DTC using “List of sor.
  • Page 34 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) K: DTC P0112 — INTAKE AIR TEMPERATURE SENSOR CIRCUIT LOW INPUT — S048521B15 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼ Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 35 Repair poor con- 1) Start engine. 120°C (248°F)? tact. 2) Read data of intake air temperature sensor NOTE: signal using Subaru Select Monitor or the In this case, OBD-II general scan tool. repair the follow- NOTE: ing: ¼ Subaru Select Monitor ¼...
  • Page 36 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) L: DTC P0113 — INTAKE AIR TEMPERATURE SENSOR CIRCUIT HIGH INPUT — S048521B16 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼ Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 37 −40°C (−40°F)? tact. 2) Start engine. NOTE: 3) Read data of intake air temperature sensor In this case, signal using Subaru Select Monitor or the repair the follow- OBD-II general scan tool. ing: ¼ Poor contact in NOTE: ¼ Subaru Select Monitor...
  • Page 38 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN INTAKE AIR Is the resistance less than Replace intake air Repair harness 5 Ω? TEMPERATURE SENSOR AND ECM CON- temperature sen- and connector. NECTOR. sor. <Ref. to NOTE: 1) Turn ignition switch to OFF.
  • Page 39 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) MEMO: EN(H6)-131...
  • Page 40 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) M: DTC P0117 — ENGINE COOLANT TEMPERATURE SENSOR CIRCUIT LOW INPUT — S048521F91 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Hard to start ¼ Erroneous idling ¼...
  • Page 41 Repair poor con- 1) Start engine. 150°C (302°F)? tact. 2) Read data of engine coolant temperature NOTE: sensor signal using Subaru Select Monitor or In this case, OBD-II general scan tool. repair the follow- NOTE: ing: ¼ Subaru Select Monitor ¼...
  • Page 42 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) N: DTC P0118 — ENGINE COOLANT TEMPERATURE SENSOR CIRCUIT HIGH INPUT — S048521F92 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Hard to start ¼ Erroneous idling ¼...
  • Page 43 Repair poor con- 1) Start engine. −40°C (−40°F)? tact. 2) Read data of engine coolant temperature NOTE: sensor signal using Subaru Select Monitor or In this case, OBD-II general scan tool. repair the follow- NOTE: ing: ¼ Subaru Select Monitor ¼...
  • Page 44 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN ENGINE Is the resistance less than Replace engine Repair harness 5 Ω? COOLANT TEMPERATURE SENSOR AND coolant tempera- and connector. ECM CONNECTOR. ture sensor. <Ref. NOTE: 1) Turn ignition switch to OFF.
  • Page 45 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) MEMO: EN(H6)-137...
  • Page 46 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) O: DTC P0121 — THROTTLE POSITION SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM (HIGH INPUT) — S048521B19 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼...
  • Page 47 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Replace throttle Monitor or OBD-II general P0122 or P0123 position sensor. scan tool indicate DTC using “List of <Ref.
  • Page 48 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) P: DTC P0122 — THROTTLE POSITION SENSOR CIRCUIT LOW INPUT — S048521B20 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼ Engine stalls. ¼ Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 49 Even if MIL lights 1) Start engine. up, the circuit has 2) Read data of throttle position sensor signal returned to a nor- using Subaru Select Monitor or OBD-II gen- mal condition at eral scan tool. this time. A tem- NOTE: porary poor con- ¼...
  • Page 50 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN ECM AND Is the voltage more than Go to step 7. Repair harness THROTTLE POSITION SENSOR CONNEC- 4.5 V? and connector. TOR. NOTE: 1) Turn ignition switch to OFF. In this case, 2) Disconnect connectors from throttle posi- repair the follow-...
  • Page 51 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) MEMO: EN(H6)-143...
  • Page 52 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Q: DTC P0123 — THROTTLE POSITION SENSOR CIRCUIT HIGH INPUT — S048521B21 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼ Engine stalls. ¼ Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 53 Even if MIL lights 1) Start engine. up, the circuit has 2) Read data of throttle position sensor signal returned to a nor- using Subaru Select Monitor or OBD-II gen- mal condition at eral scan tool. this time. A tem- NOTE: porary poor con- ¼...
  • Page 54 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) R: DTC P0131 — BANK #1 AND SENSOR #2 OXYGEN (A/F) SENSOR (FRONT RH) CIRCUIT RANGE/PERFORMANCE PROBLEM (LOW INPUT) — S048521H27 NOTE: For the diagnostic procedure, refer to DTC P0132. <Ref. to EN(H6)-149 DTC P0132 — BANK #1 AND SENSOR #2 OXYGEN (A/F) SENSOR (FRONT RH) CIRCUIT RANGE/PERFORMANCE PROBLEM (HIGH INPUT) —, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>...
  • Page 55 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) MEMO: EN(H6)-147...
  • Page 56 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) S: DTC P0132 — BANK #1 AND SENSOR #1 OXYGEN (A/F) SENSOR (FRONT RH) CIRCUIT RANGE/PERFORMANCE PROBLEM (HIGH INPUT) — S048521H28 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 57 DATA. more than 0.85 and equal 1) Start engine. to less than 1.15 in idling? 2) While observing the Subaru Select Monitor or OBD-II general scan tool screen, warm-up the engine until coolant temperature is above 75°C (167°F). If the engine is already warmed-up, operate at idle speed for at least 1 minute.
  • Page 58 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK EXHAUST SYSTEM. Is there a fault in exhaust Repair or replace Replace front oxy- Check exhaust system parts. system? faulty parts. gen (A/F) sensor. NOTE: <Ref. to FU(H6)- Check the following items.
  • Page 59 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) MEMO: EN(H6)-151...
  • Page 60 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) T: DTC P0133 — BANK #1 AND SENSOR #1 OXYGEN (A/F) SENSOR (FRONT RH) CIRCUIT SLOW RESPONSE — S048521H29 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 61 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Go to step 2. Monitor or OBD-II general P1130, P1131, scan tool indicate DTC P0031, P0032, P1130, P1131, P0031,...
  • Page 62 OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H6)-48 OPERATION, Inspec- tion Mode.>. ¼ WIRING DIAGRAM: B2M4572 Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Go to step 2. Go to step 3. Monitor or OBD-II general scan tool indicate DTC P0131, P0132, P0151 or P0152?
  • Page 63 70°C (158°F), and keep the engine speed at 2,000 rpm to 3,000 rpm for two minutes. 2) Read data of rear oxygen sensor signal using Subaru Select Monitor or OBD-II gen- eral scan tool. NOTE: ¼ Subaru Select Monitor For detailed operation procedure, refer to the “READ CURRENT DATA SHOWN ON DIS-...
  • Page 64 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK EXHAUST SYSTEM. Is there a fault in exhaust Repair or replace Replace rear oxy- Check exhaust system parts. system? faulty parts. gen sensor. <Ref. NOTE: to FU(H6)-45 Check the following items. Rear Oxygen ¼...
  • Page 65 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) MEMO: EN(H6)-157...
  • Page 66 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) V: DTC P0139 — BANK #1 AND SENSOR #2 OXYGEN SENSOR (REAR) CIRCUIT SLOW RESPONSE — S048521H31 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 67 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Replace rear oxy- Monitor or OBD-II general P0136 using “List gen sensor. <Ref. scan tool indicate DTC...
  • Page 68 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) W: DTC P0151 — BANK #2 AND SENSOR #1 OXYGEN (A/F) SENSOR (FRONT LH) CIRCUIT RANGE/PERFORMANCE PROBLEM (LOW INPUT) — S048521H32 NOTE: For the diagnostic procedure, refer to DTC P0152. <Ref. to EN(H6)-163 DTC P0152 — BANK #2 AND SENSOR #1 OXYGEN (A/F) SENSOR (FRONT LH) CIRCUIT RANGE/PERFORMANCE PROBLEM (HIGH INPUT) —, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>...
  • Page 69 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) MEMO: EN(H6)-161...
  • Page 70 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) X: DTC P0152 — BANK #2 AND SENSOR #1 OXYGEN (A/F) SENSOR (FRONT LH) CIRCUIT RANGE/PERFORMANCE PROBLEM (HIGH INPUT) — S048521H33 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 71 DATA. more than 0.85 and equal 1) Start engine. to less than 1.15 in idling? 2) While observing the Subaru Select Monitor or OBD-II general scan tool screen, warm-up the engine until coolant temperature is above 75°C (167°F). If the engine is already warmed-up, operate at idle speed for at least 1 minute.
  • Page 72 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK EXHAUST SYSTEM. Is there a fault in exhaust Repair or replace Replace front oxy- Check exhaust system parts. system? faulty parts. gen (A/F) sensor. NOTE: <Ref. to FU(H6)- Check the following items.
  • Page 73 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) MEMO: EN(H6)-165...
  • Page 74 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Y: DTC P0153 — BANK #2 AND SENSOR #1 OXYGEN (A/F) SENSOR (FRONT LH) CIRCUIT SLOW RESPONSE — S048521H34 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 75 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Go to step 2. Monitor or OBD-II general P1130, P1131, scan tool indicate DTC P0031, P0032, P1130, P1131, P0031,...
  • Page 76 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Z: DTC P0171 — FUEL TRIM #1 (RH) MALFUNCTION (A/F TOO LEAN) — S048521H35 NOTE: For the diagnostic procedure, refer to DTC P0172. <Ref. to EN(H6)-169 DTC P0172 — FUEL TRIM #1 (RH) MALFUNCTION (A/F TOO RICH) —, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>...
  • Page 77 75°C (167°F)? coolant tempera- 1) Start the engine and warm-up completely. ture sensor. <Ref. 2) Read data of engine coolant temperature to FU(H6)-29, sensor signal using Subaru Select Monitor or Engine Coolant OBD-II general scan tool. Temperature Sen- NOTE: sor.>...
  • Page 78 Sensor.> 3) Turn A/C switch to OFF. 4) Turn all accessory switches to OFF. 5) Read data of intake manifold pressure sen- sor signal using Subaru Select Monitor or OBD-II general scan tool. NOTE: ¼ Subaru Select Monitor For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”.
  • Page 79 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) MEMO: EN(H6)-171...
  • Page 80 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) AB: DTC P0174 — FUEL TRIM #2 (LH) MALFUNCTION (A/F TOO LEAN) — S048521H37 NOTE: For the diagnostic procedure, refer to DTC P0175. <Ref. to EN(H6)-173 DTC P0175 — FUEL TRIM #2 (LH) MALFUNCTION (A/F TOO RICH) —, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>...
  • Page 81 75°C (167°F)? coolant tempera- 1) Start the engine and warm-up completely. ture sensor. <Ref. 2) Read data of engine coolant temperature to FU(H6)-29, sensor signal using Subaru Select Monitor or Engine Coolant OBD-II general scan tool. Temperature Sen- NOTE: sor.>...
  • Page 82 Sensor.> 3) Turn A/C switch to OFF. 4) Turn all accessory switches to OFF. 5) Read data of intake manifold pressure sen- sor signal using Subaru Select Monitor or OBD-II general scan tool. NOTE: ¼ Subaru Select Monitor For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”.
  • Page 83 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) AD: DTC P0301 — CYLINDER 1 MISFIRE DETECTED — S048521B37 NOTE: For the diagnostic procedure, refer to DTC P0306. <Ref. to EN(H6)-177 DTC P0306 — CYLINDER 6 MIS- FIRE DETECTED —, Diagnostic Procedure with Diagnostic Trouble Code (DTC).> AE: DTC P0302 —...
  • Page 84 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) AG: DTC P0304 — CYLINDER 4 MISFIRE DETECTED — S048521B40 NOTE: For the diagnostic procedure, refer to DTC P0306. <Ref. to EN(H6)-177 DTC P0306 — CYLINDER 6 MIS- FIRE DETECTED —, Diagnostic Procedure with Diagnostic Trouble Code (DTC).> AH: DTC P0305 —...
  • Page 85 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) ¼ WIRING DIAGRAM: B2M4570 EN(H6)-177...
  • Page 86 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Go to step 2. Monitor or OBD-II general P0106, P0107, scan tool indicate DTC P0108, P0117, P0106, P0107, P0108,...
  • Page 87 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN FUEL INJEC- Is the resistance less than Go to step 5. Repair harness 1 Ω? TOR AND ECM CONNECTOR. and connector. Measure resistance of harness connector NOTE: between ECM connector and fuel injector on In this case,...
  • Page 88 Is the MIL coming on or Go to step 15. Go to step 14. FUNCTION INDICATOR LAMP (MIL). blinking? 1) Clear memory using Subaru Select Moni- tor. <Ref. to EN(H6)-51 Clear Memory Mode.> 2) Start engine, and drive the vehicle more than 10 minutes.
  • Page 89 2) Read diagnostic trouble code (DTC). scan tool indicate only one ¼ Subaru Select Monitor DTC? <Ref. to EN(H6)-40 Subaru Select Monitor.> ¼ OBD-II general scan tool For detailed operation procedures, refer to the OBD-II General Scan Tool Operation Manual.
  • Page 90 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK DIAGNOSTIC TROUBLE CODE Does the Subaru Select Go to step 26. Go to step 21. (DTC) ON DISPLAY. Monitor or OBD-II general scan tool indicate DTC P0301, P0303 and P0305?
  • Page 91 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check GROUP OF #3 AND #4 CYLINDERS Are there faults in #3 and Repair or replace Inspect DTC #4 cylinders? faulty parts. P0171, P0172, NOTE: P0174 or P0175 ¼ Check the fol- using “List of lowing items.
  • Page 92 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check GROUP OF #2, #4 AND #6 CYLINDERS Are there faults in #2, #4 Repair or replace Inspect DTC and #6 cylinders? faulty parts. P0171, P0172, NOTE: P0174 or P0175 Check the follow- using “List of ing items.
  • Page 93 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) MEMO: EN(H6)-185...
  • Page 94 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) AJ: DTC P0327 — KNOCK SENSOR 1 CIRCUIT LOW INPUT — S048521H04 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Poor driving performance ¼ Knocking occurs. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 95 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN KNOCK Is the resistance more than Go to step 2. Repair harness SENSOR 1 AND ECM CONNECTOR. 700 kΩ? and connector. 1) Turn ignition switch to OFF. NOTE: 2) Disconnect connector from ECM.
  • Page 96 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) AK: DTC P0328 — KNOCK SENSOR 1 CIRCUIT HIGH INPUT — S048521H05 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Poor driving performance ¼ Knocking occurs. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 97 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN KNOCK Is the resistance less than Go to step 2. Go to step 3. SENSOR 1 (RH) AND ECM CONNECTOR. 400 kΩ? Measure resistance of harness between ECM connector and chassis ground.
  • Page 98 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) AL: DTC P0332 — KNOCK SENSOR 2 CIRCUIT LOW INPUT — S048521H06 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Poor driving performance ¼ Knocking occurs. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 99 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN KNOCK Is the resistance more than Go to step 2. Repair harness SENSOR 2 (LH) AND ECM CONNECTOR. 700 kΩ? and connector. 1) Turn ignition switch to OFF. NOTE: 2) Disconnect connector from ECM.
  • Page 100 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) AM: DTC P0333 — KNOCK SENSOR 2 CIRCUIT HIGH INPUT — S048521H07 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Poor driving performance ¼ Knocking occurs. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 101 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN KNOCK Is the resistance less than Go to step 2. Go to step 3. SENSOR 2 (LH) AND ECM CONNECTOR. 400 kΩ? Measure resistance of harness between ECM connector and chassis ground.
  • Page 102 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) AN: DTC P0335 — CRANKSHAFT POSITION SENSOR CIRCUIT MALFUNCTION — S048521B42 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Engine stalls. ¼ Failure of engine to start CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 103 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN CRANK- Is the resistance less than Go to step 2. Repair open cir- 1 Ω? SHAFT POSITION SENSOR AND ECM. cuit between 1) Turn ignition switch to OFF. crankshaft posi- 2) Disconnect connector from ECM.
  • Page 104 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) AO: DTC P0336 — CRANKSHAFT POSITION SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM — S048521B43 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Engine stalls. ¼ Failure of engine to start CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 105 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Go to step 2. Monitor or OBD-II general P0335 using “List scan tool indicate DTC of Diagnostic...
  • Page 106 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) AP: DTC P0340 — CAMSHAFT POSITION SENSOR CIRCUIT MALFUNCTION — S048521B44 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Engine stalls. ¼ Failure of engine to start CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 107 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK POWER SUPPLY TO CAMSHAFT Is the voltage more than Repair ground Go to step 2. POSITION SENSOR. 10V ? short circuit 1) Turn ignition switch to OFF. between main 2) Disconnect connector from camshaft posi- relay connector tion sensor.
  • Page 108 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) AQ: DTC P0341 — CAMSHAFT POSITION SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM — S048521B45 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Engine stalls. ¼ Failure of engine to start CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 109 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Go to step 2. Monitor or OBD-II general P0340 using “List scan tool indicate DTC of Diagnostic...
  • Page 110 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) AR: DTC P0400 — EGR SYSTEM MALFUNCTION — S048521H08 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Poor driving performance on low engine speed ¼...
  • Page 111 1) Start engine. kPa (400 mmHg, 15.75 valve, intake 2) Rear the data of intake manifold absolute inHg)? manifold pressure pressure signal using Subaru Select Monitor sensor and or OBD-II general scan tool. throttle body are NOTE: securely installed. ¼ Subaru Select Monitor For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”.
  • Page 112 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN EGR SOLE- Is the resistance less than Go to step 7. Repair open cir- 1 Ω? NOID VALVE AND ECM CONNECTOR. cuit in harness 1) Turn ignition switch to OFF. between ECM 2) Disconnect connectors from EGR solenoid and EGR solenoid...
  • Page 113 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) MEMO: EN(H6)-205...
  • Page 114 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) AS: DTC P0444 — EVAPORATIVE EMISSION CONTROL SYSTEM PURGE CONTROL VALVE CIRCUIT LOW INPUT — S048521G47 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Erroneous idling CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 115 2) Measure voltage between ECM and chas- returned to a nor- sis ground. mal condition at Connector & terminal this time. Contact (B137) No. 16 (+) — Chassis ground your Subaru dis- (−): tributor. NOTE: Inspection by DTM is required, because probable...
  • Page 116 CHECK POOR CONTACT. Is there poor contact in Repair poor con- Contact your Check poor contact in purge control solenoid purge control solenoid tact in purge con- Subaru distributor. valve connector. valve connector? trol solenoid valve NOTE: connector. Inspection by...
  • Page 117 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) MEMO: EN(H6)-209...
  • Page 118 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) AT: DTC P0445 — EVAPORATIVE EMISSION CONTROL SYSTEM PURGE CONTROL VALVE CIRCUIT HIGH INPUT — S048521G48 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Erroneous idling CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 119 ECM and connector. chassis ground. NOTE: Purge control solenoid valve operation can be executed using Subaru Select Monitor. For procedure, refer to “Compulsory Valve Opera- tion Check Mode”. <Ref. to EN(H6)-52 Com- pulsory Valve Operation Check Mode.> Connector & terminal (B137) No.
  • Page 120 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) AU: DTC P0461 — FUEL LEVEL SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM — S048521B54 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 121 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Replace fuel level Monitor or OBD-II general P0462 or P0463 sensor <Ref. to scan tool indicate DTC using “List of...
  • Page 122 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) AV: DTC P0462 — FUEL LEVEL SENSOR CIRCUIT LOW INPUT — S048521B55 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 123 Select Monitor? porary poor con- For detailed operation procedure, refer to the tact of the con- “READ CURRENT DATA FOR ENGINE”. nector may be the <Ref. to EN(H6)-40 Subaru Select Monitor.> cause. NOTE: In this case, repair the follow- ing: ¼...
  • Page 124 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK FUEL TANK CORD. Is the resistance more than Go to step 8. Repair ground 1) Turn ignition switch to OFF. 1 MΩ? short circuit in fuel 2) Disconnect connector from fuel sub level tank cord.
  • Page 125 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) MEMO: EN(H6)-217...
  • Page 126 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) AW: DTC P0463 — FUEL LEVEL SENSOR CIRCUIT HIGH INPUT — S048521B56 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 127 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK INPUT SIGNAL FOR ECM. Is the voltage more than Go to step 3. Even if MIL lights 1) Turn ignition switch to ON. (Engine OFF) 4.75 V? up, the circuit has 2) Measure voltage between ECM connector returned to a nor- and chassis ground.
  • Page 128 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK FUEL TANK CORD. Is the resistance less than Go to step 8. Repair open cir- 10 Ω? 1) Disconnect connector from fuel sub level cuit between fuel sensor. level sensor and 2) Measure resistance between fuel level sen- fuel sub level sen-...
  • Page 129 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) MEMO: EN(H6)-221...
  • Page 130 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) AX: DTC P0480 — COOLING FAN RELAY 1 CIRCUIT LOW INPUT — S048521B57 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Radiator fan does not operate properly. ¼...
  • Page 131 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) ¼ WIRING DIAGRAM: B2M4578 EN(H6)-223...
  • Page 132 4) While operating radiator fan relay, measure voltage between ECM terminal and ground. NOTE: Radiator fan relay operation can be executed using Subaru Select Monitor. For procedure, refer to “Compulsory Valve Operation Check Mode”. <Ref. to EN(H6)-40 Subaru Select Monitor.>...
  • Page 133 CHECK POOR CONTACT. Is there poor contact in Repair poor con- Contact your Check poor contact in ECM or main fan relay ECM or main fan relay con- tact in ECM or Subaru distributor. connector. nector? main fan relay connector. EN(H6)-225...
  • Page 134 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) AY: DTC P0483 — COOLING FAN FUNCTION PROBLEM — S048521B58 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Occurrence of noise ¼ Overheating CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 135 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) ¼ WIRING DIAGRAM: B2M4578 EN(H6)-227...
  • Page 136 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK ANY OTHER DTC ON DISPLAY. Is there any other DTC on Inspect the rel- Check radiator fan display? evant DTC using and fan motor. “List of Diagnostic <Ref. to Trouble Code CO(H6)-29 (DTC)”.
  • Page 137 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) MEMO: EN(H6)-229...
  • Page 138 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) AZ: DTC P0500 — VEHICLE SPEED SENSOR MALFUNCTION — S048521B59 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 139 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK DTC P0720 ON DISPLAY. Does the Subaru Select Check front Go to step 2. Monitor or OBD-II general vehicle speed scan tool indicate DTC sensor signal cir- P0720? cuit.
  • Page 140 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) BA: DTC P0506 — IDLE CONTROL SYSTEM RPM LOWER THAN EXPECTED — S048521B61 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Engine is difficult to start. ¼...
  • Page 141 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK OUTPUT SIGNAL FROM ECM. Is the voltage more than 3 Repair poor con- Go to step 2. 1) Turn ignition switch to ON. tact in ECM con- 2) Measure voltage between ECM and chas- nector.
  • Page 142 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) BB: DTC P0507 — IDLE CONTROL SYSTEM RPM HIGHER THAN EXPECTED — S048521B62 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Engine does not return to normal idle speed. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 143 1) Turn ignition switch to ON. 2) Start engine, and warm-up the engine. 3) Turn all accessory switches to OFF. 4) Read data of idle air control solenoid valve duty ratio using Subaru Select Monitor or OBD-II general scan tool. NOTE: ¼ Subaru Select Monitor For detailed operation procedures, refer to the “READ CURRENT DATA FOR ENGINE”.
  • Page 144 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) BC: DTC P0508 — IDLE CONTROL SYSTEM CIRCUIT LOW INPUT — S048521H09 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼ Engine stalls. ¼ Engine breathing CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 145 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK OUTPUT SIGNAL FROM ECM. Is the voltage more than 3 Repair poor con- Go to step 2. 1) Turn ignition switch to ON. tact in ECM con- 2) Measure voltage between ECM and chas- nector.
  • Page 146 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) BD: DTC P0509 — IDLE CONTROL SYSTEM CIRCUIT HIGH INPUT — S048521H10 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼ Engine stalls. ¼ Engine breathing CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 147 Does the voltage change Repair battery Contact your Measure voltage between ECM and chassis more than 10 V by shaking short circuit in Subaru distributor. ground. harness and connector of harness between NOTE: Connector & terminal ECM while monitoring the...
  • Page 148 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) BE: DTC P0512 — STARTER SWITCH CIRCUIT HIGH INPUT — S048521G02 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Failure of engine to start CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 149 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) ¼ WIRING DIAGRAM: B2M4567 EN(H6)-241...
  • Page 150 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK OPERATION OF STARTER MOTOR. Does starter motor operate Repair battery Check starter NOTE: when ignition switch to short circuit in motor circuit. Place the inhibitor switch in each position. “ON”? starter motor cir- <Ref.
  • Page 151 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) MEMO: EN(H6)-243...
  • Page 152 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) BF: DTC P0604 — INTERNAL CONTROL MODULE MEMORY CHECK SUM ERROR — S048521G03 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Engine does not start. ¼ Engine stalls. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 153 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Replace ECM. It is not necessary Monitor or OBD-II general <Ref. to FU(H6)- to inspect DTC scan tool indicate DTC 46, Engine Con- P0604.
  • Page 154 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) BG: DTC P0661 — INDUCTION VALVE CONTROL SOLENOID CIRCUIT LOW INPUT — S048521H11 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Erroneous idling CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 155 2) Measure voltage between ECM and chas- returned to a nor- sis ground. mal condition at Connector & terminal this time. Contact (B137) No. 23 (+) — Chassis ground your Subaru dis- (−): tributor. NOTE: Inspection by DTM is required, because probable...
  • Page 156 CHECK POOR CONTACT. Is there poor contact in Repair poor con- Contact your Check poor contact in induction control sole- induction control solenoid tact in induction Subaru distributor noid valve connector. valve connector? control solenoid NOTE: valve connector. Inspection by...
  • Page 157 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) MEMO: EN(H6)-249...
  • Page 158 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) BH: DTC P0662 — INDUCTION VALVE CONTROL SOLENOID CIRCUIT HIGH INPUT — S048521H12 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Erroneous idling CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 159 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK OUTPUT SIGNAL FROM ECM. Is the voltage more than 10 Go to step 3. Go to step 2. 1) Turn ignition switch to ON. 2) Measure voltage between ECM and chas- sis ground.
  • Page 160 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) BI: DTC P0703 — BRAKE SWITCH INPUT MALFUNCTION — S048521B64 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 161 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN TCM AND Is the resistance less than Go to step 3. Repair or replace 1 Ω? BRAKE LIGHT SWITCH CONNECTOR. harness and con- 1) Disconnect connectors from TCM and nector.
  • Page 162 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) BJ: DTC P0705 — TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION — S048521F05 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Starter does not rotate when selector lever is in “P” or “N” range. ¼...
  • Page 163 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) BM: DTC P0720 — OUTPUT SPEED SENSOR (VEHICLE SPEED SENSOR 2) CIRCUIT MALFUNCTION — S048521B68 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ No shift or excessive tight corner “braking” CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 164 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) BR: DTC P0734 — GEAR 4 INCORRECT RATIO — S048521B73 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Shift point too high or too low; engine brake not effective in “3” range; excessive shift shock; exces- sive tight corner “braking”...
  • Page 165 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) MEMO: EN(H6)-257...
  • Page 166 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) BS: DTC P0741 — TORQUE CONVERTER CLUTCH SYSTEM MALFUNCTION — S048521G04 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ No lock-up (after engine warm-up) ¼...
  • Page 167 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK ATF TEMPERATURE SENSOR CIR- Is there any trouble in ATF Repair or replace Go to step 9. CUIT. temperature sensor circuit? ATF temperature Check ATF temperature sensor circuit. <Ref. sensor circuit.
  • Page 168 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) BT: DTC P0743 — TORQUE CONVERTER CLUTCH SYSTEM (LOCK-UP DUTY SOLENOID) ELECTRICAL — S048521B75 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ No lock-up (after engine warm-up) CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 169 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) BW: DTC P0758 — SHIFT SOLENOID B (SHIFT SOLENOID 2) ELECTRICAL — S048521B78 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ No shift CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 170 OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H6)-48 OPERATION, Inspec- tion Mode.>. Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Replace ECM. It is not necessary Monitor or OBD-II general <Ref. to FU(H6)- to inspect DTC...
  • Page 171 After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H6)-48 OPERATION, Inspec- tion Mode.>. Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Replace ECM. Monitor or OBD-II general P0106, P0107, <Ref. to FU(H6)-...
  • Page 172 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) CC: DTC P1130 — BANK #1 AND SENSOR #1 OXYGEN (A/F) SENSOR (FRONT RH) CIRCUIT MALFUNCTION (OPEN CIRCUIT) — S048521H39 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 173 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN ECM AND Is the resistance less than Go to step 2. Repair harness 1 Ω? FRONT OXYGEN (A/F) SENSOR CONNEC- and connector. TOR. NOTE: 1) Turn ignition switch to OFF. In this case, 2) Disconnect connectors from ECM and front repair the follow-...
  • Page 174 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) CD: DTC P1131 — BANK #1 AND SENSOR #1 OXYGEN (A/F) SENSOR (FRONT RH) CIRCUIT MALFUNCTION (SHORT CIRCUIT) — S048521H40 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 175 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN ECM AND Is the resistance more than Go to step 2. Repair ground 10 Ω? FRONT OXYGEN (A/F) SENSOR CONNEC- short circuit in TOR. harness between 1) Turn ignition switch to OFF.
  • Page 176 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) CE: DTC P1134 — FRONT OXYGEN (A/F) SENSOR MICRO-COMPUTER PROBLEM — S048521B96 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 177 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Replace ECM. It is not necessary Monitor or OBD-II general <Ref. to FU(H6)- to inspect DTC scan tool indicate DTC 46, Engine Con- P1134.
  • Page 178 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) CF: DTC P1135 — BANK #2 AND SENSOR #1 OXYGEN (A/F) SENSOR (FRONT LH) CIRCUIT MALFUNCTION (OPEN CIRCUIT) — S048521H41 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 179 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN ECM AND Is the resistance less than Go to step 2. Repair harness 1 Ω? FRONT OXYGEN (A/F) SENSOR CONNEC- and connector. TOR. NOTE: 1) Turn ignition switch to OFF. In this case, 2) Disconnect connectors from ECM and front repair the follow-...
  • Page 180 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) CG: DTC P1136 — BANK #2 AND SENSOR #1 OXYGEN (A/F) SENSOR (FRONT LH) CIRCUIT MALFUNCTION (SHORT CIRCUIT) — S048521H42 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 181 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN ECM AND Is the resistance more than Go to step 2. Repair ground 10 Ω? FRONT OXYGEN (A/F) SENSOR CONNEC- short circuit in TOR. harness between 1) Turn ignition switch to OFF.
  • Page 182 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) CH: DTC P1139 — BANK #1 AND SENSOR #1 OXYGEN (A/F) SENSOR (FRONT RH) HEATER CIRCUIT RANGE/PERFORMANCE PROBLEM — S048521H43 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 183 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN ECM AND Is the resistance less than Go to step 2. Repair open cir- 1 Ω? FRONT OXYGEN (A/F) SENSOR CONNEC- cuit in harness TOR. between ECM 1) Start engine, and warm-up the engine.
  • Page 184 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) CI: DTC P1140 — BANK #2 AND SENSOR #1 OXYGEN (A/F) SENSOR (FRONT LH) HEATER CIRCUIT RANGE/PERFORMANCE PROBLEM — S048521H44 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 185 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN ECM AND Is the resistance less than Go to step 2. Repair open cir- 1 Ω? FRONT OXYGEN (A/F) SENSOR CONNEC- cuit in harness TOR. between ECM 1) Start engine, and warm-up the engine.
  • Page 186 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) CJ: DTC P1142 — THROTTLE POSITION SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM (LOW INPUT) — S048521B99 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Erroneous idling ¼...
  • Page 187 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Replace throttle Monitor or OBD-II general P0122 or P0123 position sensor. scan tool indicate DTC using “List of <Ref.
  • Page 188 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) CK: DTC P1146 — PRESSURE SENSOR CIRCUIT RANGE/PERFORMANCE PROBLEM (HIGH INPUT) — S048521G07 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 189 3) Turn A/C switch to OFF. Sensor.> 4) Turn all accessory switches to OFF. 5) Read data of intake manifold pressure sen- sor signal using Subaru Select Monitor or OBD-II general scan tool. NOTE: ¼ Subaru Select Monitor For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”.
  • Page 190 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) CL: DTC P1480 — COOLING FAN RELAY 1 CIRCUIT HIGH INPUT — S048521G08 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Radiator fan does not operate properly. ¼...
  • Page 191 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) ¼ WIRING DIAGRAM: B2M4578 EN(H6)-283...
  • Page 192 ECM voltage between ECM and chassis ground. connector. NOTE: Radiator fan relay operation can be executed using Subaru Select Monitor. For procedure, refer to “Compulsory Valve Operation Check Mode”. <Ref. to EN(H6)-52 Compulsory Valve Operation Check Mode.> Connector & terminal (B137) No.
  • Page 193 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) MEMO: EN(H6)-285...
  • Page 194 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) CM: DTC P1507 — IDLE CONTROL SYSTEM MALFUNCTION (FAIL-SAFE) — S048521C16 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition ¼ TROUBLE SYMPTOM: ¼ Engine does not return to normal idle speed. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 195 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK ANY OTHER DTC ON DISPLAY. Does the Subaru Select Inspect DTC Go to step 2. Monitor or OBD-II general P0500, P0508 or scan tool indicate DTC P0509 using “List...
  • Page 196 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) CN: DTC P1518 — STARTER SWITCH CIRCUIT LOW INPUT — S048521G09 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Failure of engine to start CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 197 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) ¼ WIRING DIAGRAM: B2M4567 EN(H6)-289...
  • Page 198 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK OPERATION OF STARTER MOTOR. Does starter motor operate Repair harness Check starter NOTE: when ignition switch to and connector. motor circuit. Place the inhibitor switch in the “P” or “N” “ST”? NOTE: <Ref.
  • Page 199 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) MEMO: EN(H6)-291...
  • Page 200 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) CO: DTC P1560 — BACK-UP VOLTAGE CIRCUIT MALFUNCTION — S048521C27 ¼ DTC DETECTING CONDITION: ¼ Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 201 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN ECM AND Is the resistance less than Repair ground Go to step 3. 10 Ω? MAIN FUSE BOX CONNECTOR. short circuit in 1) Disconnect connector from ECM. harness between 2) Measure resistance of harness between ECM connector...
  • Page 202 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) CP: DTC P1590 — NEUTRAL POSITION SWITCH CIRCUIT HIGH INPUT — S048521G10 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Erroneous idling CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 203 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK DTC P0705 ON DISPLAY. Does the Subaru Select Inspect DTC Go to step 2. Monitor or OBD-II general P0705 using “List scan tool indicate DTC of Diagnostic P0705? Trouble Code (DTC)”.
  • Page 204 No. 7 — No. 12: CHECK SELECTOR CABLE CONNECTION. Is there any fault in selec- Repair selector Contact your tor cable connection to cable connection. Subaru distributor. inhibitor switch? <Ref. to CS-10 NOTE: INSPECTION, Inspection by Select Cable.> DTM is required,...
  • Page 205 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) MEMO: EN(H6)-297...
  • Page 206 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) CQ: DTC P1591 — NEUTRAL POSITION SWITCH CIRCUIT LOW INPUT — S048521G11 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Erroneous idling CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 207 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK DTC P0705 ON DISPLAY. Does the Subaru Select Inspect DTC Go to step 2. Monitor or OBD-II general P0705 using “List scan tool indicate DTC of Diagnostic P0705? Trouble Code (DTC)”.
  • Page 208 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) CR: DTC P1594 — AUTOMATIC TRANSMISSION DIAGNOSIS INPUT SIGNAL CIRCUIT MALFUNCTION — S048521G12 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 209 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK ACCESSORY. Are car phone and/or CB Repair grounding Replace TCM. installed on vehicle? line of car phone <Ref. to AT-44 or CB system. Transmission Control Module (TCM).> EN(H6)-301...
  • Page 210 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) CS: DTC P1595 — AUTOMATIC TRANSMISSION DIAGNOSIS INPUT SIGNAL CIRCUIT LOW INPUT — S048521G13 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 211 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN ECM AND Is the voltage less than 1 Go to step 2. Even if MIL lights TCM CONNECTOR. up, the circuit has 1) Turn ignition switch to ON. returned to a nor- 2) Measure voltage between ECM and chas- mal condition at...
  • Page 212 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) CT: DTC P1596 — AUTOMATIC TRANSMISSION DIAGNOSIS INPUT SIGNAL CIRCUIT HIGH INPUT — S048521G14 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 213 Even if MIL lights Contact your Measure voltage between ECM and chassis from 1 V to 4 V while moni- up, the circuit has Subaru distributor. ground. toring the value with volt- returned to a nor- NOTE: Connector & terminal...
  • Page 214 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) CU: DTC P1698 — ENGINE TORQUE CONTROL CUT SIGNAL CIRCUIT LOW INPUT — S048521G15 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 215 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK OUTPUT SIGNAL FROM ECM. Is the voltage more than 3 Repair poor con- Go to step 2. 1) Start engine, and warm-up the engine. tact in ECM con- 2) Turn ignition switch to OFF.
  • Page 216 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) CV: DTC P1699 — ENGINE TORQUE CONTROL CUT SIGNAL CIRCUIT HIGH INPUT — S048521G16 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 217 Does the voltage change Repair battery Contact your TCM CONNECTOR. more than 10 V by shaking short circuit in Subaru distributor. 1) Turn ignition switch to OFF. harness and connector of harness between NOTE: 2) Measure voltage between ECM and chas-...
  • Page 218 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) CW: DTC P1700 — THROTTLE POSITION SENSOR CIRCUIT MALFUNCTION FOR AUTOMATIC TRANSMISSION — S048521C28 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Shift point too high or too low; engine brake not effective in “3” range; excessive shift shock; exces- sive tight corner “braking”...
  • Page 219 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) MEMO: EN(H6)-311...
  • Page 220 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) CX: DTC P1701 — CRUISE CONTROL SET SIGNAL CIRCUIT MALFUNCTION FOR AUTOMATIC TRANSMISSION — S048521C29 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 221 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN TCM AND Is the resistance less than Go to step 2. Repair open cir- 1 Ω? CCM CONNECTOR. cuit in harness 1) Turn ignition switch to OFF. between TCM and 2) Disconnect connectors from TCM and CCM connector.
  • Page 222 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) CY: DTC P1703 — LOW CLUTCH TIMING CONTROL SOLENOID VALVE CIRCUIT MALFUNCTION — S048521C31 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H6)-51 OPERATION, Clear Memory Mode.>...
  • Page 223 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) MEMO: EN(H6)-315...
  • Page 224 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) CZ: DTC P1711 — ENGINE TORQUE CONTROL SIGNAL 1 CIRCUIT MALFUNCTION — S048521G17 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Excessive shift shock CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 225 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK INPUT SIGNAL FOR ECM. Is the voltage more than Go to step 2. Go to step 4. 1) Turn ignition switch to ON. 4.5 V? 2) Measure voltage between ECM and chas- sis ground.
  • Page 226 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) DA: DTC P1712 — ENGINE TORQUE CONTROL SIGNAL 2 CIRCUIT MALFUNCTION — S048521G18 ¼ DTC DETECTING CONDITION: ¼ Two consecutive driving cycles with fault ¼ TROUBLE SYMPTOM: ¼ Excessive shift shock CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 227 DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) Engine (DIAGNOSTICS) Step Check CHECK INPUT SIGNAL FOR ECM. Is the voltage more than Go to step 2. Go to step 4. 1) Turn ignition switch to ON. 4.5 V? 2) Measure voltage between ECM and chas- sis ground.

  • Page 228: General Diagnostic Table

    GENERAL DIAGNOSTIC TABLE Engine (DIAGNOSTICS) 19. General Diagnostic Table S048257 A: INSPECTION S048257A10 1. ENGINE S048257A1001 NOTE: Malfunction of parts other than those listed is also possible. <Ref. to ME(H6)-79, Engine Trouble in Gen- eral.> Symptom Problem parts 1) Idle air control solenoid valve 2) Intake manifold pressure sensor 3) Intake air temperature sensor 4) Ignition parts (*1)

  • Page 229: Automatic Transmission

    GENERAL DIAGNOSTIC TABLE Engine (DIAGNOSTICS) Symptom Problem parts 1) Intake manifold pressure sensor 2) Intake air temperature sensor 3) Engine coolant temperature sensor (*2) 4) Crankshaft position sensor (*3) 5. Engine stalls or engine sags or hesitates at 5) Camshaft position sensor (*3) acceleration.
  • Page 230 GENERAL DIAGNOSTIC TABLE Engine (DIAGNOSTICS) MEMO: EN(H6)-322...

This manual is also suitable for:

2001 legacy