Subaru legacy 2004 Service Manual
  1. Manuals
  2. Brands
  3. Subaru Manuals
  4. Automobile
  5. 2004 LEGACY
  6. Service manual
Subaru legacy 2004 Service Manual

Subaru legacy 2004 Service Manual

Hide thumbs Also See for legacy 2004:
Table of Contents

Advertisement

Quick Links

Download this manual See also: Service Manual, Owner's Manual
2004 LEGACY SERVICE MANUAL

ENGINE SECTION 1

This service manual has been prepared
to provide SUBARU service personnel
with the necessary information and data
for the correct maintenance and repair
of SUBARU vehicles.
This manual includes the procedures
for maintenance, disassembling, reas-
sembling, inspection and adjustment of
components and diagnostics for guid-
ance 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 specifi-
cations contained in this manual are
based on the latest product information
available at the time of publication
approval.
FUJI HEAVY INDUSTRIES LTD.
QUICK REFERENCE INDEX
FUEL INJECTION (FUEL SYSTEMS)
EMISSION CONTROL
(AUX. EMISSION CONTROL DEVICES)
INTAKE (INDUCTION)
MECHANICAL
EXHAUST
COOLING
LUBRICATION
SPEED CONTROL SYSTEMS
IGNITION
STARTING/CHARGING SYSTEMS
ENGINE (DIAGNOSTICS)
FUEL INJECTION (FUEL SYSTEMS)
EMISSION CONTROL
(AUX. EMISSION CONTROL DEVICES)
INTAKE (INDUCTION)
MECHANICAL
EXHAUST
COOLING
FU(H4SO 2.0)
EC(H4SO 2.0)
IN(H4SO 2.0)
ME(H4SO 2.0)
EX(H4SO 2.0)
CO(H4SO 2.0)
LU(H4SO 2.0)
SP(H4SO 2.0)
IG(H4SO 2.0)
SC(H4SO 2.0)
EN(H4SO 2.0)
(diag)
FU(H4SO 2.5)
EC(H4SO 2.5)
IN(H4SO 2.5)
ME(H4SO 2.5)
EX(H4SO 2.5)
CO(H4SO 2.5)
G2320GE2

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the legacy 2004 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Subaru legacy 2004

Summary of Contents for Subaru legacy 2004

  • Page 1: Engine Section

    (AUX. EMISSION CONTROL DEVICES) INTAKE (INDUCTION) IN(H4SO 2.0) MECHANICAL ME(H4SO 2.0) This service manual has been prepared to provide SUBARU service personnel EXHAUST EX(H4SO 2.0) with the necessary information and data for the correct maintenance and repair of SUBARU vehicles.
  • Page 2 2003 LEGACY SERVICE MANUAL QUICK REFERENCE INDEX ENGINE SECTION 1 LUBRICATION LU(H4SO 2.5) SPEED CONTROL SYSTEMS SP(H4SO 2.5) IGNITION IG(H4SO 2.5) STARTING/CHARGING SYSTEMS SC(H4SO 2.5) EN(H4SO 2.5) ENGINE (DIAGNOSTICS) (diag) G2320GE2...

  • Page 3: Table Of Contents

    Electrical Component Location ..............8 Engine Control Module (ECM) I/O Signal ..........17 Engine Condition Data ................21 Data Link Connector .................22 OBD-II General Scan Tool ................23 Subaru Select Monitor................26 Read Diagnostic Trouble Code (DTC) ............33 Inspection Mode..................34 Drive Cycle....................39 Clear Memory Mode..................41 Compulsory Valve Operation Check Mode ..........42...
  • Page 4 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) 18.Diagnostic Procedure with Diagnostic Trouble Code (DTC) A: DTC P0030 HO2S HEATER CONTROL CIRCUIT (BANK 1 SENSOR 1) DTC DETECTING CONDITION: Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 5 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS...
  • Page 6 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) B: DTC P0031 HO2S HEATER CONTROL CIRCUIT LOW (BANK 1 SENSOR 1) DTC DETECTING CONDITION: Immediately at fault recognition. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 7 Go to step 6. 1) Start the engine. contact connector. 2) Read the data of front oxygen (A/F) sensor NOTE: heater current using Subaru Select Monitor. In this case, repair the following: NOTE: For detailed operation procedure, refer to the •...
  • Page 8 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK INPUT SIGNAL FROM ECM. Is the voltage less than 1 V? Go to step 8. Go to step 7. 1) Start and idle the engine. 2) Measure the voltage between ECM con- nector and chassis ground.
  • Page 9 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) C: DTC P0032 HO2S HEATER CONTROL CIRCUIT HIGH (BANK 1 SENSOR 1) DTC DETECTING CONDITION: Immediately at fault recognition. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 10 (ECM).> connector. 3) Turn the ignition switch to ON. 4) Read the data of front oxygen (A/F) sensor heater current using Subaru Select Monitor. NOTE: For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”. <Ref. to EN(H4SO 2.5)(diag)-26, Subaru Select Mon- itor.>...
  • Page 11 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) D: DTC P0037 HO2S HEATER CONTROL CIRCUIT LOW (BANK 1 SENSOR 2) DTC DETECTING CONDITION: Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 12 NOTE: For detailed operation procedure, refer to the • Poor contact in “READ CURRENT DATA FOR ENGINE”. <Ref. rear oxygen sen- to EN(H4SO 2.5)(diag)-26, Subaru Select Mon- sor connector itor.> • Poor contact in rear oxygen sen- sor connecting harness connector •...
  • Page 13 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK OUTPUT SIGNAL FROM ECM. Is the voltage less than 1 V? Replace the ECM. Repair the battery 1) Disconnect the connector from rear oxygen <Ref. to FU(H4SO short circuit in har- sensor.
  • Page 14 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) E: DTC P0038 HO2S HEATER CONTROL CIRCUIT HIGH (BANK 1 SENSOR 2) DTC DETECTING CONDITION: Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 15 4) Read the data of rear oxygen sensor heater current using Subaru Select Monitor. NOTE: For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”. <Ref. to EN(H4SO 2.5)(diag)-26, Subaru Select Mon- itor.> CHECK POOR CONTACT. Is there poor contact in ECM Repair the poor END.
  • Page 16 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) F: DTC P0102 MASS OR VOLUME AIR FLOW CIRCUIT LOW INPUT DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: • Erroneous idling • Engine stalls. • Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 17 SELECT MONITOR. function indicator 1) Turn the ignition switch to OFF. light illuminates, 2) Connect the Subaru Select Monitor to data the circuit has link connector. returned to a nor- 3) Turn the ignition switch to ON, and the Sub- mal condition at aru Select Monitor switch to ON.
  • Page 18 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN ECM AND Is the resistance less than 1 Go to step 7. Repair the open Ω? MASS AIR FLOW SENSOR CONNECTOR. circuit between 1) Turn the ignition switch to OFF. ECM and mass air 2) Disconnect the connector from ECM.
  • Page 19 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) G: DTC P0103 MASS OR VOLUME AIR FLOW CIRCUIT HIGH INPUT DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: • Erroneous idling • Engine stalls. • Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 20 SELECT MONITOR. function indicator 1) Turn the ignition switch to OFF. light illuminates, 2) Connect the Subaru Select Monitor to data the circuit has link connector. returned to a nor- 3) Turn the ignition switch to ON, and the Sub- mal condition at aru Select Monitor switch to ON.
  • Page 21 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) H: DTC P0107 MANIFOLD ABSOLUTE PRESSURE/BAROMETRIC PRESSURE CIRCUIT LOW INPUT DTC DETECTING CONDITION: Immediately at fault recognition. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 22 Go to step 3. 1) Start the engine. (100 mmHg, 3.94 inHg)? 2) Read the data of intake manifold absolute pressure signal using Subaru Select Monitor. NOTE: For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”. <Ref.
  • Page 23 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN ECM AND Is the voltage more than 4.5 V? Go to step 9. Repair the open MANIFOLD ABSOLUTE PRESSURE SEN- circuit in harness SOR CONNECTOR. between ECM and 1) Turn the ignition switch to OFF.
  • Page 24 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) I: DTC P0108 MANIFOLD ABSOLUTE PRESSURE/BAROMETRIC PRESSURE CIRCUIT HIGH INPUT DTC DETECTING CONDITION: Immediately at fault recognition. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 25 1) Start the engine. kPa (896.5 mmHg, 35.29 2) Read the data of intake manifold absolute inHg)? pressure signal using Subaru Select Monitor. NOTE: For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”. <Ref. to EN(H4SO 2.5)(diag)-26, Subaru Select Mon- itor.>...
  • Page 26 ECM and sure sensor. <Ref. 1) Turn the ignition switch to OFF, and the manifold absolute to FU(H4SO 2.5)- Subaru Select Monitor switch to OFF. pressure sensor 25, Manifold Abso- 2) Disconnect the connector from manifold connector. lute Pressure Sen- absolute pressure sensor.
  • Page 27 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) J: DTC P0112 INTAKE AIR TEMPERATURE CIRCUIT LOW INPUT DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: • Erroneous idling • Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 28 Repair the poor 1) Start the engine. more than 120°C (248°F)? contact. 2) Read the data of mass air flow and intake NOTE: air temperature sensor signal using Subaru In this case, repair Select Monitor. the following: • Poor contact in NOTE:...
  • Page 29 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) K: DTC P0113 INTAKE AIR TEMPERATURE CIRCUIT HIGH INPUT DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: • Erroneous idling • Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 30 Repair the poor less than −40°C (−40°F)? 1) Start the engine. contact. 2) Read the data of air flow and intake air tem- NOTE: perature sensor signal using Subaru Select In this case, repair Monitor. the following: • Poor contact in NOTE:...
  • Page 31 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN MASS AIR Is the voltage more than 3 V? Go to step 6. Repair the har- FLOW AND INTAKE AIR TEMPERATURE ness and connec- SENSOR AND ECM CONNECTOR. tor.
  • Page 32 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) L: DTC P0117 ENGINE COOLANT TEMPERATURE CIRCUIT LOW INPUT DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: • Hard to start • Erroneous idling • Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 33 Repair the poor 1) Start the engine. ture more than 150°C (302°F)? contact. 2) Read the data of engine coolant tempera- NOTE: ture sensor signal using Subaru Select Moni- In this case, repair tor. the following: • Poor contact in NOTE:...
  • Page 34 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) M: DTC P0118 ENGINE COOLANT TEMPERATURE CIRCUIT HIGH INPUT DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: • Hard to start • Erroneous idling • Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 35 Repair the poor ture less than −40°C (−40°F)? 1) Start the engine. contact. 2) Read the data of engine coolant tempera- NOTE: ture sensor signal using Subaru Select Moni- In this case, repair tor. the following: • Poor contact in NOTE:...
  • Page 36 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN ENGINE Is the voltage more than 4 V? Go to step 6. Repair the har- COOLANT TEMPERATURE SENSOR AND ness and connec- ECM CONNECTOR. tor. Measure the voltage between engine coolant NOTE: temperature sensor connector and engine In this case, repair...
  • Page 37 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) N: DTC P0122 THROTTLE/PEDAL POSITION SENSOR/SWITCH “A” CIRCUIT LOW INPUT DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: • Erroneous idling • Engine stalls. • Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 38 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) WIRING DIAGRAM: • EC, EK and K4 model BATTERY ELECTRONIC SBF-8 THROTTLE B362 CONTROL RELAY MAIN RELAY B135 B136 B137 : TERMINAL NO. RANDOM ARRANGEMENT B138 : LHD B138 B122 : RHD B122 ELECTRONIC THROTTLE CONTROL...
  • Page 39 Is the voltage more than 0.4 V? Go to step 3. Go to step 4. 1) Turn the ignition switch to ON. 2) Read the data of main throttle sensor signal using Subaru Select Monitor. CHECK POOR CONTACT. Is there poor contact in con- Repair the poor...
  • Page 40 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) O: DTC P0123 THROTTLE/PEDAL POSITION SENSOR/SWITCH “A” CIRCUIT HIGH INPUT DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: • Erroneous idling • Engine stalls. • Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 41 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) WIRING DIAGRAM: • EC, EK and K4 model BATTERY ELECTRONIC SBF-8 THROTTLE B362 CONTROL RELAY MAIN RELAY B135 B136 B137 : TERMINAL NO. RANDOM ARRANGEMENT B138 : LHD B138 B122 : RHD B122 ELECTRONIC THROTTLE CONTROL...
  • Page 42 Go to step 3. Go to step 4. 1)Turn the ignition switch to ON. 2)Read the data of main throttle sensor signal using Subaru Select Monitor. CHECK POOR CONTACT. Is there poor contact in con- Repair the poor Temporary poor...
  • Page 43 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) P: DTC P0125 INSUFFICIENT COOLANT TEMPERATURE FOR CLOSED LOOP FUEL CONTROL DTC DETECTING CONDITION: Two consecutive driving cycles with fault TROUBLE SYMPTOM: Engine will not return to idling. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 44 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS...
  • Page 45 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Q: DTC P0131 O2 SENSOR CIRCUIT LOW VOLTAGE (BANK 1 SENSOR 1) DTC DETECTING CONDITION: Immediately at fault recognition. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 46 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS...
  • Page 47 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) R: DTC P0132 O2 SENSOR CIRCUIT HIGH VOLTAGE (BANK 1 SENSOR 1) DTC DETECTING CONDITION: Immediately at fault recognition. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 48 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS...
  • Page 49 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) S: DTC P0133 O2 SENSOR CIRCUIT SLOW RESPONSE (BANK 1 SENSOR 1) DTC DETECTING CONDITION: Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 50 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS...
  • Page 51 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) T: DTC P0134 O2 SENSOR CIRCUIT NO ACTIVITY DETECTED (BANK 1 SEN- SOR 1) DTC DETECTING CONDITION: Immediately at fault recognition. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 52 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS...
  • Page 53 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) U: DTC P0137 O2 SENSOR CIRCUIT LOW VOLTAGE (BANK 1 SENSOR 2) DTC DETECTING CONDITION: Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 54 2) Read the data of rear oxygen sensor signal using Subaru Select Monitor. NOTE: For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”. <Ref. to EN(H4SO 2.5)(diag)-26, Subaru Select Mon- itor.> CHECK HARNESS BETWEEN ECM AND Is the resistance more than 3 Repair the open Go to step 5.
  • Page 55 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN REAR OXY- Is the voltage 0.2 — 0.5 V? Replace the rear Repair the har- GEN SENSOR AND ECM CONNECTOR. oxygen sensor. ness and connec- 1) Turn the ignition switch to OFF. <Ref.
  • Page 56 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) V: DTC P0138 O2 SENSOR CIRCUIT HIGH VOLTAGE (BANK 1 SENSOR 2) DTC DETECTING CONDITION: Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 57 2) Read the data of rear oxygen sensor signal using Subaru Select Monitor. NOTE: For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”. <Ref. to EN(H4SO 2.5)(diag)-26, Subaru Select Mon- itor.> CHECK HARNESS BETWEEN ECM AND Is the resistance more than 3 Repair the open Go to step 5.
  • Page 58 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN REAR OXY- Is the voltage 0.2 — 0.5 V? Replace the rear Repair the har- GEN SENSOR AND ECM CONNECTOR. oxygen sensor. ness and connec- 1) Turn the ignition switch to OFF. <Ref.
  • Page 59 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) W: DTC P0139 O2 SENSOR CIRCUIT SLOW RESPONSE (BANK 1 SENSOR 2) DTC DETECTING CONDITION: Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 60 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS...
  • Page 61 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Y: DTC P0172 SYSTEM TOO RICH (BANK 1) DTC DETECTING CONDITION: Two consecutive driving cycles with fault TROUBLE SYMPTOM: • Erroneous idling • Engine stalls. • Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 62 1) Start the engine and warm-up completely. 100°C (212°F)? temperature sen- 2) Read the data of engine coolant tempera- sor. <Ref. to ture sensor signal using Subaru Select Moni- FU(H4SO 2.5)-20, tor. Engine Coolant Temperature Sen- NOTE: sor.>...
  • Page 63 ON? 5) Read the data of manifold pressure sensor signal using Subaru Select Monitor. NOTE: For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”. <Ref. to EN(H4SO 2.5)(diag)-26, Subaru Select Mon- itor.> EN(H4SO 2.5)(diag)-139...
  • Page 64 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Z: DTC P0222 THROTTLE/PEDAL POSITION SENSOR/SWITCH “B” CIRCUIT LOW INPUT DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: • Erroneous idling • Poor driving performance • Engine stalls. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 65 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) WIRING DIAGRAM: • EC, EK and K4 model BATTERY ELECTRONIC SBF-8 THROTTLE B362 CONTROL RELAY MAIN RELAY B135 B136 B137 : TERMINAL NO. RANDOM ARRANGEMENT B138 : LHD B138 B122 : RHD B122 ELECTRONIC THROTTLE CONTROL...
  • Page 66 Is the voltage more than 0.8 V? Go to step 3. Go to step 4. 1) Turn the ignition switch to ON. 2) Read the data of sub throttle sensor signal using Subaru Select Monitor. CHECK POOR CONTACT. Is there poor contact? Repair the poor...
  • Page 67 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) AA:DTC P0223 THROTTLE/PEDAL POSITION SENSOR/SWITCH “B” CIRCUIT HIGH INPUT DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: • Erroneous idling • Poor driving performance • Engine stalls. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 68 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) WIRING DIAGRAM: • EC, EK and K4 model BATTERY ELECTRONIC SBF-8 THROTTLE B362 CONTROL RELAY MAIN RELAY B135 B136 B137 : TERMINAL NO. RANDOM ARRANGEMENT B138 : LHD B138 B122 : RHD B122 ELECTRONIC THROTTLE CONTROL...
  • Page 69 Go to step 3. Go to step 4. 1) Turn the ignition switch to ON. 2) Read the data of sub throttle sensor signal using Subaru Select Monitor. CHECK POOR CONTACT. Is there poor contact in con- Repair the poor...
  • Page 70 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) AB:DTC P0301 CYLINDER 1 MISFIRE DETECTED NOTE: For the diagnostic procedure, refer to DTC P0304. <Ref. to EN(H4SO 2.5)(diag)-147, DTC P0304 CYLIN- DER 4 MISFIRE DETECTED, Diagnostic Procedure with Diagnostic Trouble Code (DTC).> AC:DTC P0302 CYLINDER 2 MISFIRE DETECTED NOTE: For the diagnostic procedure, refer to DTC P0304.
  • Page 71 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) AE:DTC P0304 CYLINDER 4 MISFIRE DETECTED DTC DETECTING CONDITION: • Two consecutive driving cycles with fault • Immediately at fault recognition (A misfire which could damage catalyst occurs.) TROUBLE SYMPTOM: • Engine stalls. •...
  • Page 72 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS...
  • Page 73 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK POWER SUPPLY LINE. Is the voltage more than 10 V? Repair the poor Repair the har- 1) Turn the ignition switch to ON. contact in all con- ness and connec- 2) Measure the voltage between fuel injector nectors in fuel tor.
  • Page 74 Go to step 16. Go to step 15. CATOR LIGHT. light come on or blink? 1) Clear the memory using Subaru Select Monitor. <Ref. to EN(H4SO 2.5)(diag)-41, Clear Memory Mode.> 2) Start the engine, and drive the vehicle more than 10 minutes.
  • Page 75 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) AF:DTC P0327 KNOCK SENSOR 1 CIRCUIT LOW INPUT (BANK 1 OR SINGLE SENSOR) DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: • Poor driving performance • Knocking occurs. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 76 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS...
  • Page 77 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) AG:DTC P0328 KNOCK SENSOR 1 CIRCUIT HIGH INPUT (BANK 1 OR SINGLE SENSOR) DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: • Poor driving performance • Knocking occurs. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 78 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS...
  • Page 79 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) AH:DTC P0335 CRANKSHAFT POSITION SENSOR “A” CIRCUIT DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: • Engine stalls. • Failure of engine to start CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 80 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS...
  • Page 81 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK CONDITION OF CRANKSHAFT PO- Is the crankshaft position sen- Go to step 6. Tighten the crank- SITION SENSOR. sor installation bolt tightened shaft position sen- securely? sor installation bolt securely.
  • Page 82 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) AI: DTC P0340 CAMSHAFT POSITION SENSOR “A” CIRCUIT (BANK 1 OR SIN- GLE SENSOR) DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: • Engine stalls. • Failure of engine to start CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 83 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS...
  • Page 84 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK CAMSHAFT POSITION SENSOR. Is the resistance 1 — 4 kΩ? Repair the poor Replace the cam- 1) Remove the camshaft position sensor. contact in cam- shaft position sen- 2) Measure the resistance between connector shaft position sen- sor.
  • Page 85 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) AJ:DTC P0400 EXHAUST GAS RECIRCULATION FLOW DTC DETECTING CONDITION: Two consecutive driving cycles with fault TROUBLE SYMPTOM: • Movement performance problem when engine is low speed. • Erroneous idling • Movement performance problem CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 86 1) Start the engine. kPa (400 mmHg, 15.75 inHg)? EGR valve, mani- 2) Read the data of intake manifold absolute fold absolute pres- pressure signal using Subaru Select Monitor. sure sensor and throttle body are NOTE: installed securely. For detailed operation procedure, refer to the “READ CURRENT DATA FOR ENGINE”.
  • Page 87 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN EGR SOLE- Is the resistance less than 1 Go to step 7. Repair the open Ω? NOID VALVE AND ECM CONNECTOR. circuit in harness 1) Turn the ignition switch to OFF. between ECM and 2) Detach the connector from EGR solenoid EGR solenoid...
  • Page 88 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) AK:DTC P0420 CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD (BANK DTC DETECTING CONDITION: Two consecutive driving cycles with fault TROUBLE SYMPTOM: • Engine stalls. • Idle mixture is out of specifications. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 89 <Ref. to EC(H4SO 2.0)-4, Rear Catalytic Converter.> CHECK FRONT CATALYTIC CONVERTER. Is there damage at rear face or Replace the front Contact Subaru Remove the front catalytic converter. front face of front catalyst? catalytic con- distributor service. verter. <Ref. to NOTE: EC(H4SO 2.0)-3,...
  • Page 90 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) AL:DTC P0458 EVAPORATIVE EMISSION CONTROL SYSTEM PURGE CON- TROL VALVE CIRCUIT LOW DTC DETECTING CONDITION: Two consecutive driving cycles with fault TROUBLE SYMPTOM: Erroneous idling CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 91 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS...
  • Page 92 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK POOR CONTACT. Is there poor contact in purge Repair the poor Replace the ECM. Check poor contact in purge control solenoid control solenoid valve connec- contact in purge <Ref.
  • Page 93 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) AM:DTC P0459 EVAPORATIVE EMISSION CONTROL SYSTEM PURGE CON- TROL VALVE CIRCUIT HIGH DTC DETECTING CONDITION: Two consecutive driving cycles with fault TROUBLE SYMPTOM: Erroneous idling CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 94 NOTE: ECM connector. Purge control solenoid valve operation can be executed using Subaru Select Monitor. Refer to “Compulsory Valve Operation Check Mode” for procedures. <Ref. to EN(H4SO 2.5)(diag)-42, Compulsory Valve Operation Check Mode.> Connector & terminal −...
  • Page 95 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK POOR CONTACT. Is there poor contact in ECM Repair the poor Replace the ECM. Check poor contact in ECM connector. connector? contact in ECM <Ref. to FU(H4SO connector. 2.5)-36, Engine Control Module (ECM).>...
  • Page 96 2.0 L model. CHECK ANY OTHER DTC ON DISPLAY. Is DTC P0462 displayed on the Check the combi- Temporary poor Subaru Select Monitor? nation meter sys- contact occurs. tem. <Ref. to IDI-3, Combination Meter System.>...
  • Page 97 2.0 L model. CHECK ANY OTHER DTC ON DISPLAY. Is DTC P0463 displayed on the Check the combi- Temporary poor Subaru Select Monitor? nation meter sys- contact occurs. tem. <Ref. to IDI-3, Combination Meter System.>...
  • Page 98 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) AP:DTC P0500 VEHICLE SPEED SENSOR DTC DETECTING CONDITION: Immediately at fault recognition. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO 2.5)(diag)-34, Inspection Mode.>. Step Check CHECK OPTION CODE.
  • Page 99 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) AQ:DTC P0512 STARTER REQUEST CIRCUIT DTC DETECTING CONDITION: Two consecutive driving cycles with fault TROUBLE SYMPTOM: Failure of engine to start CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 100 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) WIRING DIAGRAM: • EC, EK and K4 model IGNITION SWITCH BATTERY SBF-7 SBF-1 STARTER RELAY STARTER MOTOR B225 B135 B137 B225 B135 B137 4 5 6 11 12 15 16 19 20 23 24 10 11 12 13 14 15 16 17...
  • Page 101 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS...
  • Page 102 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) AR:DTC P0519 IDLE CONTROL SYSTEM MALFUNCTION (FAIL-SAFE) DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: Engine keeps running at higher revolution than specified idling revolution. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 103 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) AT:DTC P0559 GENERATOR CIRCUIT HIGH DTC DETECTING CONDITION: Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO 2.5)(diag)-34, Inspection Mode.>. WIRING DIAGRAM: •...

  • Page 104: Basic Diagnostic Procedure

    Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS...
  • Page 105 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) AV:DTC P0604 INTERNAL CONTROL MODULE READ ACCESS MEMORY (RAM) ERROR DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: • Engine does not start. • Engine stalls. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 106 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS...
  • Page 107 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) AX:DTC P0607 CONTROL MODULE PERFORMANCE DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: • Erroneous idling • Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 108 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS...
  • Page 109 2.0 L model. CHECK ANY OTHER DTC ON DISPLAY. Is DTC P0691 displayed on the Check the radiator Temporary poor Subaru Select Monitor? fan system. <Ref. contact occurs. to CO(H4SO 2.0)- 7, Radiator Fan System.>...
  • Page 110 2.0 L model. CHECK ANY OTHER DTC ON DISPLAY. Is DTC P0692 displayed on the Check the radiator Temporary poor Subaru Select Monitor? fan system. <Ref. contact occurs. to CO(H4SO 2.0)- 7, Radiator Fan System.>...
  • Page 111 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) BC:DTC P0851 NEUTRAL SWITCH INPUT CIRCUIT LOW DTC DETECTING CONDITION: Two consecutive driving cycles with fault TROUBLE SYMPTOM: Erroneous idling CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 112 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS...
  • Page 113 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) BD:DTC P0852 NEUTRAL SWITCH INPUT CIRCUIT HIGH DTC DETECTING CONDITION: Two consecutive driving cycles with fault TROUBLE SYMPTOM: Erroneous idling CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 114 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS...
  • Page 115 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK INHIBITOR SWITCH GROUND LINE. Is the resistance less than 5 Go to step 9. Repair the open Ω? Measure the resistance of harness between circuit in harness inhibitor switch connector and engine ground. between inhibitor Connector &...
  • Page 116 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) BE:DTC P1086 TUMBLE GENERATED VALVE POSITION SENSOR 2 CIRCUIT DTC DETECTING CONDITION: Immediately at fault recognition TROUBLE SYMPTOM: • Erroneous idling • Engine stalls. • Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...

  • Page 117: Obd-Ii General Scan Tool

    1) Start the engine. indicator light 2) Read the data of throttle position sensor lights up, the cir- signal using Subaru Select Monitor or OBD-II cuit has returned general scan tool. to a normal condi- tion at this time. A...
  • Page 118 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN ECM AND Is the voltage more than 4.5 V? Go to step 7. Repair the har- TUMBLE GENERATOR VALVE POSITION ness and connec- SENSOR CONNECTOR. tor. 1) Turn the ignition switch to OFF.
  • Page 119 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) BF:DTC P1087 TUMBLE GENERATED VALVE POSITION SENSOR 2 CIRCUIT HIGH DTC DETECTING CONDITION: Immediately at fault recognition TROUBLE SYMPTOM: • Erroneous idling • Engine stalls. • Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...

  • Page 120: Subaru Select Monitor

    1) Start the engine. indicator light 2) Read the data of throttle position sensor lights up, the cir- signal using Subaru Select Monitor or OBD-II cuit has returned general scan tool. to a normal condi- tion at this time. A...

  • Page 121: Inspection Mode

    Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) BG:DTC P1088 TUMBLE GENERATED VALVE POSITION SENSOR 1 CIRCUIT DTC DETECTING CONDITION: Immediately at fault recognition TROUBLE SYMPTOM: • Erroneous idling • Engine stalls. • Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 122 1) Start the engine. indicator light 2) Read the data of tumble generator valve lights up, the cir- position sensor signal using Subaru Select cuit has returned Monitor or OBD-II general scan tool. to a normal condi- tion at this time. A...
  • Page 123 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN ECM AND Is the voltage more than 4.5 V? Go to step 7. Repair the har- TUMBLE GENERATOR VALVE POSITION ness and connec- SENSOR CONNECTOR. tor. 1) Turn the ignition switch to OFF.

  • Page 124: Clear Memory Mode

    Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) BH:DTC P1089 TUMBLE GENERATED VALVE POSITION SENSOR 1 CIRCUIT HIGH DTC DETECTING CONDITION: Immediately at fault recognition TROUBLE SYMPTOM: • Erroneous idling • Engine stalls. • Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...

  • Page 125: Malfunction Indicator Light

    1) Start the engine. indicator light 2) Read the data of tumble generator valve lights up, the cir- position sensor signal using Subaru Select cuit has returned Monitor or OBD-II general scan tool. to a normal condi- tion at this time. A...

  • Page 126: List Of Diagnostic Trouble Code (Dtc)

    Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) BI: DTC P1090 TUMBLE GENERATED VALVE SYSTEM 1 (VALVE OPEN) DTC DETECTING CONDITION: Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...

  • Page 127: Diagnostic Procedure With Diagnostic Trouble Code (Dtc)

    Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) BJ:DTC P1091 TUMBLE GENERATED VALVE SYSTEM 1 (VALVE CLOSE) DTC DETECTING CONDITION: Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 128 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) BK:DTC P1092 TUMBLE GENERATED VALVE SYSTEM 2 (VALVE OPEN) DTC DETECTING CONDITION: Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 129 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) BL:DTC P1093 TUMBLE GENERATED VALVE SYSTEM 2 (VALVE CLOSE) DTC DETECTING CONDITION: Immediately at fault recognition CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 130 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) BM:DTC P1094 TUMBLE GENERATED VALVE SIGNAL 1 CIRCUIT MALFUNC- TION (OPEN) DTC DETECTING CONDITION: Immediately at fault recognition. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 131 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN ECM AND Is the resistance less than 1 Go to step 2. Repair the open Ω? TUMBLE GENERATOR VALVE ACTUATOR circuit between CONNECTOR. ECM and tumble 1) Turn the ignition switch to OFF.
  • Page 132 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) BN:DTC P1095 TUMBLE GENERATED VALVE SIGNAL 1 CIRCUIT MALFUNC- TION (SHORT) DTC DETECTING CONDITION: Immediately at fault recognition. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 133 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN ECM AND Is the voltage less than 5 V? Replace the tum- Repair the battery TUMBLE GENERATOR VALVE ACTUATOR ble generator valve short circuit CONNECTOR. assembly. <Ref. to between ECM and 1) Turn the ignition switch to OFF.
  • Page 134 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) BO:DTC P1096 TUMBLE GENERATED VALVE SIGNAL 2 CIRCUIT MALFUNC- TION (OPEN) DTC DETECTING CONDITION: Immediately at fault recognition. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 135 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN ECM AND Is the resistance less than 1 Go to step 2. Repair the open Ω? TUMBLE GENERATOR VALVE ACTUATOR circuit between CONNECTOR. ECM and tumble 1) Turn the ignition switch to OFF.
  • Page 136 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) BP:DTC P1097 TUMBLE GENERATED VALVE SIGNAL 2 CIRCUIT MALFUNC- TION (SHORT) DTC DETECTING CONDITION: Immediately at fault recognition. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 137 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN ECM AND Is the voltage less than 5 V? Replace the tum- Repair the battery TUMBLE GENERATOR VALVE ACTUATOR ble generator valve short circuit CONNECTOR. assembly. <Ref. to between ECM and 1) Turn the ignition switch to OFF.
  • Page 138 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) BQ:DTC P1110 ATMOSPHERIC PRESSURE SENSOR CIRCUIT MALFUNCTION (LOW INPUT) DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 139 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) BR:DTC P1111 ATMOSPHERIC PRESSURE SENSOR CIRCUIT MALFUNCTION (HIGH INPUT) DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 140 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) BS:DTC P1152 O2 SENSOR CIRCUIT RANGE/PERFORMANCE (LOW) (BANK1 SENSOR1) DTC DETECTING CONDITION: Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 141 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS...
  • Page 142 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) BT:DTC P1153 O2 SENSOR CIRCUIT RANGE/PERFORMANCE (HIGH) (BANK1 SENSOR1) DTC DETECTING CONDITION: Two consecutive driving cycles with fault CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 143 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS...
  • Page 144 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK OUTPUT SIGNAL FOR ECM. Is the voltage more than 10 V? Repair the battery Repair the poor Measure the voltage between ECM connector short circuit in har- contact in ECM and chassis ground.
  • Page 145 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) BU:DTC P1160 RETURN SPRING FAILURE NOTE: For diagnostic procedure, refer to DTC P2101. <Ref. to EN(H4SO 2.5)(diag)-231, DTC P2101 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT RANGE/PERFORMANCE, Diagnostic Procedure with Diagnos- tic Trouble Code (DTC).> BV:DTC P1492 EGR SOLENOID VALVE SIGNAL #1 CIRCUIT MALFUNCTION (LOW INPUT) NOTE:...
  • Page 146 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) CB:DTC P1498 EGR SOLENOID VALVE SIGNAL #4 CIRCUIT MALFUNCTION (LOW INPUT) DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: • Erroneous idling • Poor driving performance • Engine breathing CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 147 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK POWER SUPPLY TO EGR SOLE- Is the voltage more than 10 V? Go to step 2. Repair the har- NOID VALVE. ness and connec- 1) Turn the ignition switch to OFF. tor.
  • Page 148 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) CC:DTC P1499 EGR SOLENOID VALVE SIGNAL #4 CIRCUIT MALFUNCTION (HIGH INPUT) DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: • Erroneous idling • Poor driving performance • Engine breathing CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref.
  • Page 149 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK ANY OTHER DTC ON DISPLAY. Is any other DTC displayed? Inspect the DTC Go to step 2. using “List of Diag- nostic Trouble Code (DTC)”. <Ref. to EN(H4SO 2.5)(diag)-70, List of Diagnostic Trou- ble Code (DTC).>...
  • Page 150 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) CD:DTC P1518 STARTER SWITCH CIRCUIT LOW INPUT DTC DETECTING CONDITION: Two consecutive driving cycles with fault TROUBLE SYMPTOM: Failure of engine to start CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 151 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) WIRING DIAGRAM: • EC, EK and K4 model IGNITION SWITCH BATTERY SBF-7 SBF-1 STARTER RELAY STARTER MOTOR B225 B135 B137 B225 B135 B137 4 5 6 11 12 15 16 19 20 23 24 10 11 12 13 14 15 16 17...
  • Page 152 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS...
  • Page 153 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) CE:DTC P1560 BACK-UP VOLTAGE CIRCUIT MALFUNCTION DTC DETECTING CONDITION: Immediately at fault recognition. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H4SO 2.5)(diag)-34, Inspection Mode.>. WIRING DIAGRAM: •...
  • Page 154 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS...
  • Page 155 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) CF:DTC P2101 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT RANGE/ PERFORMANCE DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: • Erroneous idling • Poor driving performance • Engine stalls. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 156 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) WIRING DIAGRAM: • EC, EK and K4 model BATTERY ELECTRONIC SBF-8 THROTTLE B362 CONTROL RELAY MAIN RELAY B135 B136 B137 : TERMINAL NO. RANDOM ARRANGEMENT B138 : LHD B138 B122 : RHD B122 ELECTRONIC THROTTLE CONTROL...
  • Page 157 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS...
  • Page 158 1) Connect all the connectors. 2) Turn the ignition switch to ON. 3) Read the data of main throttle sensor signal using Subaru Select Monitor. CHECK SENSOR OUTPUT. Is the voltage more than 0.8 V? Go to step 9. Go to step 10.
  • Page 159 3) Turn the ignition switch to ON. Replace the elec- 4) Read the data of main throttle sensor signal tronic throttle con- using Subaru Select Monitor. trol if defective. CHECK SENSOR OUTPUT. Is the voltage 1.64 — 1.70 V? Go to step 24.
  • Page 160 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN ECM AND Is the resistance less than 1 Go to step 25. Repair the open Ω? ELECTRONIC THROTTLE CONTROL MO- circuit of harness TOR. connector. 1) Turn the ignition switch to OFF. 2) Disconnect the connector from ECM.
  • Page 161 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) CG:DTC P2102 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT LOW DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: • Erroneous idling • Poor driving performance • Engine stalls. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 162 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) WIRING DIAGRAM: • EC, EK and K4 model BATTERY ELECTRONIC SBF-8 THROTTLE B362 CONTROL RELAY MAIN RELAY B135 B136 B137 : TERMINAL NO. RANDOM ARRANGEMENT B138 : LHD B138 B122 : RHD B122 ELECTRONIC THROTTLE CONTROL...
  • Page 163 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2. Refer to EN(H4SO 2.0) section. <Ref. to EN(H4SO 2.0)(diag)-66, List of Diagnostic Trou- ble Code (DTC).> NOTE: Fuel injection sys- tem for KA and KS...
  • Page 164 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) CH:DTC P2103 THROTTLE ACTUATOR CONTROL MOTOR CIRCUIT HIGH DTC DETECTING CONDITION: Immediately at fault recognition. CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 165 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) • KA and KS model NOTE: Fuel injection system for KA and KS model is the same as 2.0 L model. Refer to EN(H4SO 2.0) section. Step Check CHECK OPTION CODE. Is the option code EC, EK or Go to step 2.
  • Page 166 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) CJ:DTC P2122 THROTTLE/PEDAL POSITION SENSOR/SWITCH “D” CIRCUIT LOW INPUT DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: • Erroneous idling • Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 167 Is the voltage more than 0.4 V? Go to step 3. Go to step 4. SOR OUTPUT. 1) Turn the ignition switch to ON. 2) Read the data of main accelerator position sensor signal using Subaru Select Monitor. CHECK POOR CONTACT. Is there poor contact? Repair the poor Temporary poor Check poor contact in connector between contact.
  • Page 168 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK ACCELERATOR POSITION SEN- Is the resistance 0.2 — 1.0 Go to step 9. Replace the accel- SOR. kΩ? erator position Measure the resistance of accelerator position sensor. sensor. Terminals No.
  • Page 169 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) CK:DTC P2123 THROTTLE/PEDAL POSITION SENSOR/SWITCH “D” CIRCUIT HIGH INPUT DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: • Erroneous idling • Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 170 Is the voltage less than 4.8 V? Go to step 3. Go to step 4. SOR OUTPUT. 1) Turn the ignition switch to ON. 2) Read the data of main accelerator position sensor signal using Subaru Select Monitor. CHECK POOR CONTACT. Is there poor contact? Repair the poor Temporary poor Check poor contact in connector between contact.
  • Page 171 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) CL:DTC P2127 THROTTLE/PEDAL POSITION SENSOR/SWITCH “E” CIRCUIT LOW INPUT DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: • Erroneous idling • Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 172 Is the voltage more than 0.4 V? Go to step 3. Go to step 4. SOR OUTPUT. 1) Turn the ignition switch to ON. 2) Read the data of sub accelerator position sensor signal using Subaru Select Monitor. CHECK POOR CONTACT. Is there poor contact? Repair the poor Temporary poor Check poor contact in connector between contact.
  • Page 173 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK ACCELERATOR POSITION SEN- Is the resistance 0.15 — 0.63 Go to step 9. Replace the accel- SOR. kΩ? erator position 1) Measure the resistance of accelerator posi- sensor. tion sensor.
  • Page 174 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) CM:DTC P2128 THROTTLE/PEDAL POSITION SENSOR/SWITCH “E” CIRCUIT HIGH INPUT DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: • Erroneous idling • Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 175 Is the voltage less than 4.8 V? Go to step 3. Go to step 4. SOR OUTPUT. 1) Turn the ignition switch to ON. 2) Read the data of sub accelerator position sensor signal using Subaru Select Monitor. CHECK POOR CONTACT. Is there poor contact? Repair the poor Temporary poor Check poor contact in connector between contact.
  • Page 176 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) CN:DTC P2135 THROTTLE/PEDAL POSITION SENSOR/SWITCH “A” / “B” VOLTAGE RATIONALITY DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: • Erroneous idling • Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 177 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) WIRING DIAGRAM: • EC, EK and K4 model BATTERY ELECTRONIC SBF-8 THROTTLE B362 CONTROL RELAY MAIN RELAY B135 B136 B137 : TERMINAL NO. RANDOM ARRANGEMENT B138 : LHD B138 B122 : RHD B122 ELECTRONIC THROTTLE CONTROL...
  • Page 178 Go to step 5. 1) Turn the ignition switch to ON. 2) Read the data of main throttle sensor signal using Subaru Select Monitor. CHECK SENSOR OUTPUT. Is the voltage more than 0.8 V? Go to step 4. Go to step 5.
  • Page 179 Go to step 12. 1) Connect all the connectors. 2) Turn the ignition switch to ON. 3) Read the data of main throttle sensor signal using Subaru Select Monitor. CHECK SENSOR OUTPUT. Is the voltage less than 4.73 Go to step 11.
  • Page 180 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN ECM AND Is the resistance more than 1 Go to step 17. Repair the short ELECTRONIC THROTTLE CONTROL. MΩ? circuit to sensor 1) Turn the ignition switch to OFF. power supply.
  • Page 181 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) CO:DTC P2138 THROTTLE/PEDAL POSITION SENSOR/SWITCH “D” / “E” VOLTAGE RATIONALITY DTC DETECTING CONDITION: Immediately at fault recognition. TROUBLE SYMPTOM: • Erroneous idling • Poor driving performance CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode <Ref. to EN(H4SO 2.5)(diag)- 41, Clear Memory Mode.>...
  • Page 182 SOR OUTPUT. 1) Turn the ignition switch to ON. 2) Read the data of main accelerator position sensor signal and sub accelerator position sensor signal using Subaru Select Monitor. CHECK POOR CONTACT. Is there poor contact? Repair the poor Go to step 13.
  • Page 183 2) Connect all the connectors. 3) Turn the ignition switch to ON. 4) Read the data of main throttle sensor signal and sub accelerator position sensor signal using Subaru Select Monitor. CHECK POOR CONTACT. Is there poor contact? Repair the poor Go to step 19.
  • Page 184 Diagnostic Procedure with Diagnostic Trouble Code (DTC) ENGINE (DIAGNOSTICS) Step Check CHECK HARNESS BETWEEN ECM AND AC- Is the resistance less than 5 Go to step 17. Repair the poor Ω? CELERATOR POSITION SENSOR. contact in ECM 1) Connect the ECM connector. connector.
  • Page 185 General Diagnostic Table ENGINE (DIAGNOSTICS) 19.General Diagnostic Table A: INSPECTION 1. ENGINE NOTE: Malfunction of parts other than those listed is also possible. <Ref. to ME(H4SO 2.0)-83, Engine Trouble in General.> Symptom Problem parts 1) Manifold absolute pressure sensor 2) Mass air flow and intake air temperature sensor 3) Ignition parts (*1) 1.
  • Page 186 General Diagnostic Table ENGINE (DIAGNOSTICS) Symptom Problem parts 1) Mass air flow and intake air temperature sensor 2) Manifold absolute pressure sensor 3) Engine coolant temperature sensor (*2) 4) Crankshaft position sensor (*3) 5) Camshaft position sensor (*3) 6. Surge 6) Fuel injection parts (*4) 7) Electronic throttle control 8) Fuel pump and fuel pump relay...

Table of Contents