Subaru 2001 IMPREZA Service Manual
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Subaru 2001 IMPREZA Service Manual

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2001 IMPREZA SERVICE MANUAL

BODY SECTION

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
HVAC SYSTEM
(HEATER, VENTILATOR AND A/C)
HVAC SYSTEM (AUTO A/C)
(DIAGNOSTICS)
AIRBAG SYSTEM
AIRBAG SYSTEM (DIAGNOSTICS)
SEAT BELT SYSTEM
LIGHTING SYSTEM
WIPER AND WASHER SYSTEMS
ENTERTAINMENT
COMMUNICATION SYSTEM
GLASS/WINDOWS/MIRRORS
BODY STRUCTURE
INSTRUMENTATION/DRIVER INFO
SEATS
SECURITY AND LOCKS
IMMOBILIZER (DIAGNOSTICS)
SUNROOF/T-TOP/CONVERTIBLE TOP
(SUNROOF)
EXTERIOR/INTERIOR TRIM
AC
AC
AB
AB
SB
LI
WW
ET
COM
GW
BS
IDI
SE
SL
IM
SR
EI
G1830GE6

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Summary of Contents for Subaru 2001 IMPREZA

  • Page 1: Body Section

    2001 IMPREZA SERVICE MANUAL QUICK REFERENCE INDEX BODY SECTION HVAC SYSTEM (HEATER, VENTILATOR AND A/C) HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) AIRBAG SYSTEM AIRBAG SYSTEM (DIAGNOSTICS) This service manual has been prepared to provide SUBARU service personnel SEAT BELT SYSTEM with the necessary information and data for the correct maintenance and repair of SUBARU vehicles.
  • Page 2 2001 IMPREZA SERVICE MANUAL QUICK REFERENCE INDEX BODY SECTION EXTERIOR BODY PANELS CRUISE CONTROL SYSTEM CRUISE CONTROL SYSTEM (DIAGNOSTICS) G1830GE6...

  • Page 3: Table Of Contents

    HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) Page Basic Diagnostic Procedure ................2 General Description ..................3 Electrical Components Location..............6 A/C Control Module I/O Signal ..............8 Diagnostics Chart for Diagnosis System...........18 Diagnostics for A/C System Failure ............22 Diagnostic Procedure for Actuators ............30 Diagnostic Procedure for Sensors ............36 Symptom Related Diagnostic..............46...

  • Page 4: Basic Diagnostic Procedure

    BASIC DIAGNOSTIC PROCEDURE HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) 1. Basic Diagnostic Procedure A: PROCEDURE Step Check START INSPECTIONS. Dose self-diagnosis operate? Go to step 2. <Ref. to AC-22, A/ 1)Perform pre-inspection. C AND/OR SELF- 2)Perform self-diagnosis. <Ref. to AC-18, DIAGNOSIS SYS- SELF-DIAGNOSIS MODE, Diagnostics Chart TEMS DO NOT for Diagnosis System.>...

  • Page 5: General Description

    GENERAL DESCRIPTION HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) 2. General Description B: INSPECTION Before performing diagnosis, check the following A: CAUTION items which might affect engine problems. 1) Never connect the battery in reverse polarity. 1. BATTERY • The Auto A/C control module will be destroyed instantly.
  • Page 6 GENERAL DESCRIPTION HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) 7) If the thread does not move at all, remove the 3. REFRIGERANT LINE auto A/C control unit <Ref. to AC-26, REMOVAL, Check contact for refrigerant line (A). Control Unit.> and check for improper connection of the aspirator hose (a) and auto A/C control unit and secure as necessary.

  • Page 7: Control Switches

    GENERAL DESCRIPTION HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) 5. CONTROL SWITCHES Start and warm up engine completely. 1) Inspection using switches. Point to check Switch operation Judgement standard A/C switch LED goes out. OFF position • Fan speed: OFF Fan speed control dial •...

  • Page 8: Electrical Components Location

    ELECTRICAL COMPONENTS LOCATION HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) 3. Electrical Components Location A: LOCATION 1. ENGINE COMPARTMENT HV0030 A/C compressor Pressure switch A/C relay Ambient sensor AC-6...

  • Page 9: Passenger Compartment

    ELECTRICAL COMPONENTS LOCATION HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) 2. PASSENGER COMPARTMENT HV0031 Evaporator sensor Intake door actuator Sunload sensor Blower motor Air mix door actuator In-vehicle sensor (built-in Auto A/C control module) Blower motor resistor Mode door actuator AC-7...
  • Page 10 A/C CONTROL MODULE I/O SIGNAL HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) 4. A/C Control Module I/O Signal A: ELECTRICAL SPECIFICATION 20 19 18 17 16 15 14 13 12 11 16 15 14 13 12 11 To B283 : b To B282 : a HV0032 Connector &...
  • Page 11 A/C CONTROL MODULE I/O SIGNAL HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) B: SCHEMATIC 1. AIR CONDITIONER AUTO A/C LHD MODEL TO POWER SUPPLY ROUTING FB-19 FB-20 FB-34 F/B FUSE NO. 17 F/B FUSE NO. 17 F/B FUSE NO. 1 (B) (IG) (IG) F/B FUSE NO.
  • Page 12 A/C CONTROL MODULE I/O SIGNAL HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) VEHICLE SPEED TO POWER SUPPLY ROUTING SENSOR (MT) FB-8 FB-9 FB-27 FB-17 TRANSMISSION M/B FUSE NO. 2 F/B FUSE NO. 2 F/B FUSE NO. 9 F/B FUSE NO. 18 CONTROL (ACC) (IG) MODULE (AT)
  • Page 13 A/C CONTROL MODULE I/O SIGNAL HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) B: B283 AUTO A/C CONTROL MODULE B282 B256 -COM LCD(OUT TEMP) AMBIENT SENSOR EVAPORATION SUNLOAD COMBINATION THERMO SWITCH SENSOR METER (BLACK) B282 (GRAY) (GRAY) (BLACK) B283 B256 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 11...
  • Page 14 A/C CONTROL MODULE I/O SIGNAL HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) A: B282 B: B283 AUTO A/C CONTROL MODULE B209 B293 FRESH/RECIRC REF. TO GND-01•02 THERMOMETER ACTUATOR B282 (GRAY) (GRAY) (BLACK) (LIGHT GRAY) (BLACK) B283 B293 (LIGHT GRAY) 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 9 10 3 4 5 6 9 10 11 12 13 14 15 16...
  • Page 15 A/C CONTROL MODULE I/O SIGNAL HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) 2. AIR CONDITIONER AUTO A/C RHD MODEL TO POWER SUPPLY ROUTING FB-19 FB-20 FB-34 F/B FUSE NO. 17 F/B FUSE NO. 17 F/B FUSE NO. 1 (B) (IG) (IG) F/B FUSE NO. 2 (B) : TURBO ENGINE MODEL BLOWER MOTOR : NON-TURBO ENGINE MODEL...
  • Page 16 A/C CONTROL MODULE I/O SIGNAL HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) TO POWER SUPPLY ROUTING VEHICLE SPEED SENSOR (MT) MB-10 FB-27 FB-17 M/B FUSE NO. 2 F/B FUSE NO. 9 F/B FUSE NO. 18 (ACC) (IG) TRANSMISSION CONTROL MODULE (AT) WITH ILLUMINATION CONTROL MODEL : YL : WITHOUT ILLUMINATION CONTROL MODEL...

  • Page 17: A/C Control Module I/O Signal

    A/C CONTROL MODULE I/O SIGNAL HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) B: B283 AUTO A/C CONTROL MODULE B282 B256 -COM LCD(OUT TEMP) AMBIENT SENSOR EVAPORATION SUNLOAD COMBINATION THERMO SWITCH SENSOR METER (BLACK) B282 (GRAY) (BLACK) (GRAY) B283 (GREEN) B256 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 9 10...
  • Page 18 A/C CONTROL MODULE I/O SIGNAL HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) A: B282 B: B283 AUTO A/C CONTROL MODULE B293 : TURBO ENGINE MODEL : NON-TURBO ENGIN MODEL FRESH/RECIRC ACTUATOR REF. TO GND-01•02 THERMOMETER : (BLACK) B282 (GRAY) (GRAY) (LIGHT GRAY) (BLACK) B283 : (LIGHT GRAY)
  • Page 19 A/C CONTROL MODULE I/O SIGNAL HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) AC-17...

  • Page 20: Diagnostics Chart For Diagnosis System

    DIAGNOSTICS CHART FOR DIAGNOSIS SYSTEM HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) 5. Diagnostics Chart for Diagnosis System A: SELF-DIAGNOSIS MODE HV0033 Air flow control dial A/C switch Temperature control dial Rear window defogger switch FRESH/RECIRC switch Fan speed control dial Step Check SELECT CONTROL PANEL TO SELF-DIAG- Does the self-diagnosis mode...
  • Page 21 DIAGNOSTICS CHART FOR DIAGNOSIS SYSTEM HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) Step Check CHECK MODE DOOR POSITION SIGNAL. Does rear window defogger Go to step 6. Check mode door 1)Turn fan speed control dial to 2nd position. switch LED illuminate? actuator circuit. 2)If system has the trouble for mode door posi- <Ref.
  • Page 22 DIAGNOSTICS CHART FOR DIAGNOSIS SYSTEM HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) 1. SENSOR CHECK TABLE NOTE: When the sunload sensor is checked indoors or in the shade, open circuit might be indicated. Always check the sunload sensor at a place where sun shines directly on it. Air flow control dial position Checked sensor...
  • Page 23 DIAGNOSTICS CHART FOR DIAGNOSIS SYSTEM HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) AC-21...

  • Page 24: Diagnostics For A/C System Failure

    DIAGNOSTICS FOR A/C SYSTEM FAILURE HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) 6. Diagnostics for A/C System Failure A: A/C AND/OR SELF-DIAGNOSIS SYSTEMS DO NOT OPERATE TROUBLE SYMPTOM: • “Set” temperature is not indicated on display, switch LEDs are faulty and switches do not operate. •...
  • Page 25 Connector & terminal (B283) No. 12 — Chassis ground: CHECK POOR CONTACT. Is there poor contact in A/C Repair poor con- Contact with your Check poor contact in A/C control module. control module? tact in A/C control Subaru distributor. module. AC-23...
  • Page 26 DIAGNOSTICS FOR A/C SYSTEM FAILURE HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) B: BLOWER MOTOR IS NOT ROTATED TROUBLE SYMPTOM: • Blower motor is not rotated. • Blower motor is not rotated in “HI”. WIRING DIAGRAM: BATTERY F/B NO. 1 SBF-3 SBF-1 F/B NO.
  • Page 27 3)Make sure that blower fan motor is operated. CHECK POOR CONTACT. Is there poor contact in A/C Repair poor con- Contact with your Check poor contact in A/C control module. control module? tact in A/C control Subaru distributor. module. AC-25...
  • Page 28 DIAGNOSTICS FOR A/C SYSTEM FAILURE HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) C: COMPARTMENT TEMPERATURE IS NOT CHANGED OR A/C SYSTEM DOES NOT RESPOND QUICKLY WIRING DIAGRAM FOR TURBO ENGINE MODEL: IGNITION BATTERY SWITCH F/B No.17 SBF-4 SBF-1 F/B No.18 MAIN FAN MAIN FAN MOTOR RELAY-1...
  • Page 29 DIAGNOSTICS FOR A/C SYSTEM FAILURE HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) WIRING DIAGRAM FOR NON-TURBO ENGINE MODEL: IGNITION BATTERY SWITCH F/B No.17 SBF-4 SBF-1 F/B No.18 MAIN FAN MAIN FAN MOTOR RELAY MAIN FAN RELAY SUB FAN CONDITIONING MOTOR RELAY PRESSURE SWITCH : LHD MODEL: 11 : RHD MODEL: 12...
  • Page 30 DIAGNOSTICS FOR A/C SYSTEM FAILURE HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) Step Check CHECK FUSE. Is the fuse blown-out? Replace fuse. Go to step 2. 1)Turn ignition switch to OFF. 2)Remove No. 2 fuse in main fuse box. 3)Check condition of fuse. CHECK POWER SUPPLY TO MAGNET Is the voltage more than 10 V? Go to step 3.
  • Page 31 Diagnostics Chart for Diagnosis System.> nostic Procedure for Actuators.> CHECK POOR CONTACT. Is there poor contact in A/C Repair poor con- Contact with your Check poor contact in A/C control module. control module? tact in A/C control Subaru distributor. module. AC-29...

  • Page 32: Diagnostic Procedure For Actuators

    DIAGNOSTIC PROCEDURE FOR ACTUATORS HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) 7. Diagnostic Procedure for Actuators A: INTAKE DOOR ACTUATOR TROUBLE SYMPTOM: FRESH/RECIRC mode is not changed. WIRING DIAGRAM: AUTO A/C B282 B283 CONTROL MODULE B282 1 2 3 4 5 6 7 8 3 4 5 6 9 10 11 12 13 14 15 16 HV0038...
  • Page 33 (B282) No. 7 — (B91) No. 2 CHECK POOR CONTACT. Is there poor contact in A/C Repair poor con- Contact with your Check poor contact in A/C control module. control module? tact in A/C control Subaru distributor. module. AC-31...
  • Page 34 DIAGNOSTIC PROCEDURE FOR ACTUATORS HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) B: MODE DOOR ACTUATOR TROUBLE SYMPTOM: Air flow outlet is not changed. WIRING DIAGRAM: AUTO A/C B282 B283 CONTROL MODULE MODE DOOR ACTUATOR B282 B283 5 6 7 5 6 7 8 9 10 9 10 11 12 13 14 15 16 11 12 13 14 15 16 17 18 19 20...
  • Page 35 (B77) No. 2 (+) — Chassis ground ( − − − − ): CHECK POOR CONTACT. Is there poor contact? Repair poor con- Contact with your Check poor contact in auto A/C control module tact. Subaru distributor. and mode door actuator. AC-33...
  • Page 36 DIAGNOSTIC PROCEDURE FOR ACTUATORS HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) C: AIR MIX DOOR ACTUATOR TROUBLE SYMPTOM: Outlet air temperature is not changed. WIRING DIAGRAM: AUTO A/C B282 B283 CONTROL MODULE B293 AIR MIX DOOR ACTUATOR B293 B282 B283 5 6 7 5 6 7 8 9 10 9 10 11 12 13 14 15 16...
  • Page 37 (B293) No. 2 (+) — Chassis ground ( − − − − ): CHECK POOR CONTACT. Is there poor contact? Repair poor con- Contact with your Check poor contact in auto A/C control module tact. Subaru distributor. and air mix door actuator. AC-35...

  • Page 38: Diagnostic Procedure For Sensors

    DIAGNOSTIC PROCEDURE FOR SENSORS HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) 8. Diagnostic Procedure for Sensors A: AMBIENT SENSOR TROUBLE SYMPTOM: Fan speed is not switched when the fan speed control dial is in AUTO position. WIRING DIAGRAM: AMBIENT SENSOR : LHD MODEL: 2 RHD MODEL: 1 : LHD MODEL: 1 RHD MODEL: 2...
  • Page 39 RHD model: (F78) No. 1 — (B283) No. 17 CHECK POOR CONTACT. Is there poor contact in A/C Repair poor con- Contact with your Check poor contact in A/C control module. control module? tact in A/C control Subaru distributor. module. AC-37...
  • Page 40 DIAGNOSTIC PROCEDURE FOR SENSORS HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) B: IN-VEHICLE SENSOR TROUBLE SYMPTOM: When turning AUTO switch to ON, blower fan speed, outlet port and inlet port is not changed. If switch LED indicates that the sensor is malfunctioning, replace the A/C control module. The in-vehicle sen- sor is built into the A/C control module and cannot be replaced as a single unit.
  • Page 41 DIAGNOSTIC PROCEDURE FOR SENSORS HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) AC-39...
  • Page 42 DIAGNOSTIC PROCEDURE FOR SENSORS HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) C: EVAPORATOR SENSOR WIRING DIAGRAM: B256 AUTO A/C B282 B283 CONTROL MODULE B256 B283 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 HV0042 AC-40...
  • Page 43 Connector & terminal: (B256) No. 1 — (B283) No. 17 Is there poor contact in A/C Repair poor con- Contact with your CHECK POOR CONTACT. Check poor contact in A/C control module. control module? tact in A/C control Subaru distributor. module. AC-41...
  • Page 44 DIAGNOSTIC PROCEDURE FOR SENSORS HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) AC-42...
  • Page 45 DIAGNOSTIC PROCEDURE FOR SENSORS HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) D: SUNLOAD SENSOR TROUBLE SYMPTOM: • Sensor identified that sunlight is at maximum. Then, A/C system is controlled to COOL side. • Sensor identified that sunlight is at minimum. Then, A/C system is controlled to HOT side. NOTE: When the sunload sensor is checked indoors or in the shade, open circuit might be indicated.
  • Page 46 DIAGNOSTIC PROCEDURE FOR SENSORS HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) WIRING DIAGRAM: AUTO A/C B282 B283 CONTROL MODULE B283 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 HV0043 AC-44...
  • Page 47 Connector & terminal: (i51) No. 1 — (B283) No. 17 CHECK POOR CONTACT. Is there poor contact in A/C Repair poor con- Contact with your Check poor contact in A/C control module. control module? tact in A/C control Subaru distributor. module. AC-45...

  • Page 48: Symptom Related Diagnostic

    SYMPTOM RELATED DIAGNOSTIC HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) 9. Symptom Related Diagnostic A: GENERAL DIAGNOSTICS TABLE Symptom Component parts Fuses (M/B No. 5, F/B No. 17) Poor connector contacts Ground A/C control module Air mix door actuator and potention meter (including links) Mode door actuator and potention meter (including links)

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