1. Manuals
  2. Brands
  3. Subaru Manuals
  4. Automobile
  5. Impreza 2004
  6. Service manual

Subaru Impreza 2004 Service Manual

Hide thumbs Also See for Impreza 2004:
Table of Contents

Advertisement

Quick Links

Download this manual See also: Service Manual, Owner's Manual
2004 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
SUNROOF/T-TOP/CONVERTIBLE TOP
(SUNROOF)
EXTERIOR/INTERIOR TRIM
EXTERIOR BODY PANELS
AC
AC(diag)
AB
AB(diag)
SB
LI
WW
ET
COM
GW
BS
IDI
SE
SL
SR
EI
EB
G1870GE6

Advertisement

Table of Contents
loading

Related Manuals for Subaru Impreza 2004

Summary of Contents for Subaru Impreza 2004

  • Page 1: Body Section

    AC(diag) (DIAGNOSTICS) AIRBAG SYSTEM AIRBAG SYSTEM (DIAGNOSTICS) AB(diag) 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. LIGHTING SYSTEM This manual includes the procedures...
  • Page 2 2004 IMPREZA SERVICE MANUAL QUICK REFERENCE INDEX BODY SECTION CRUISE CONTROL SYSTEM CRUISE CONTROL SYSTEM CC(diag) (DIAGNOSTICS) IMMOBILIZER (DIAGNOSTICS) IM(diag) G1870GE6...

  • Page 3: Table Of Contents

    HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) AC(diag) Page Basic Diagnostic Procedure ................2 General Description ..................3 Electrical Components Location..............5 A/C Control Module I/O Signal ..............7 Diagnostics Chart for Self-diagnosis ............9 Diagnostics for A/C System Malfunction ...........12 Diagnostic Procedure for Actuators ............23 Diagnostic Procedure for Sensors ............29 Symptom Related Diagnostic..............35...

  • Page 4: Basic Diagnostic Procedure

    Basic Diagnostic Procedure HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) 1. Basic Diagnostic Procedure A: PROCEDURE Step Check START INSPECTIONS. Does the self-diagnosis oper- Go to step 2. <Ref. to AC(diag)- 1)Perform the pre-inspection. <Ref. to ate? 12, A/C AND/OR AC(diag)-3, INSPECTION, General Descrip- SELF-DIAGNO- tion.>...

  • Page 5: General Description

    General Description HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) 2. General Description NOTE: Ensure the paper does not get sucked into the port. A: CAUTION 1) Never connect the battery in reverse polarity. • The Auto A/C control module will be destroyed instantly.

  • Page 6: Control Switches

    General Description HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) 5. CONTROL SWITCHES Start and warm up the 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 7: Electrical Components Location

    Electrical Components Location HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) 3. Electrical Components Location A: LOCATION 1. ENGINE COMPARTMENT AC-00666 A/C compressor Pressure switch Ambient sensor A/C relay AC(diag)-5...

  • Page 8: Passenger Compartment

    Electrical Components Location HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) 2. PASSENGER COMPARTMENT AC-00667 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(diag)-6...

  • Page 9: A/C Control Module I/O Signal

    A/C Control Module I/O Signal HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) 4. A/C Control Module I/O Signal A: ELECTRICAL SPECIFICATION 16 15 14 13 12 11 20 19 18 17 16 15 14 13 12 11 To A: B282 To B: B283 AC-00735 Connector &...
  • Page 10 A/C Control Module I/O Signal HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) B: WIRING DIAGRAM 1. AIR CONDITIONER AUTO A/C LHD MODEL <Ref. to WI-53, MANUAL A/C LHD MODEL, WIRING DIAGRAM, Air Conditioning System.> 2. AIR CONDITIONER AUTO A/C RHD MODEL <Ref. to WI-59, MANUAL A/C RHD MODEL, WIRING DIAGRAM, Air Conditioning System.> AC(diag)-8...

  • Page 11: Diagnostics Chart For Self-Diagnosis

    Diagnostics Chart for Self-diagnosis HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) 5. Diagnostics Chart for Self-diagnosis A: OPERATION AC-00654 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 Go to step 2.
  • Page 12 Diagnostics Chart for Self-diagnosis HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) Step Check CHECK MODE DOOR POSITION SIGNAL. Does the rear window defogger Go to step 6. Check the mode 1)Turn the fan speed control dial to 2nd posi- switch LED illuminate? door actuator cir- tion.
  • Page 13 Diagnostics Chart for Self-diagnosis 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 Checked sensor No trouble...

  • Page 14: Diagnostics For A/C System Malfunction

    Diagnostics for A/C System Malfunction HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) 6. Diagnostics for A/C System Malfunction A: A/C AND/OR SELF-DIAGNOSIS SYSTEMS DO NOT OPERATE TROUBLE SYMPTOM: • “Set” temperature is not indicated on the display, switch LEDs are faulty and switches do not operate. •...
  • Page 15 Diagnostics for A/C System Malfunction HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) Step Check CHECK FUSE. Is the fuse blown-out? Replace the fuse. Go to step 2. 1)Turn the ignition switch to OFF. 2)Remove the fuse No. 2 from main fuse box. 3)Check the condition of fuse.
  • Page 16 Diagnostics for A/C System Malfunction 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 17 Diagnostics for A/C System Malfunction HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) Step Check CHECK FUSE. Are any of the fuses blown- Replace the fuse. Go to step 2. 1)Remove the No.1, No. 2 and No. 17 fuses in out? fuse & relay box. 2)Check the condition of fuses.
  • Page 18 Diagnostics for A/C System Malfunction HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) C: COMPARTMENT TEMPERATURE IS NOT CHANGED OR A/C SYSTEM DOES NOT RESPOND QUICKLY WIRING DIAGRAM: • FOR LHD DOHC TURBO MODEL IGNITION BATTERY SWITCH AIR CONDITIONING RELAY HOLDER F/B No.17 SBF-4 SBF-1 F/B No.18...
  • Page 19 Diagnostics for A/C System Malfunction HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) • FOR RHD DOHC TURBO MODEL IGNITION BATTERY SWITCH AIR CONDITIONING RELAY HOLDER F/B No.17 SBF-4 SBF-1 F/B No.18 MAIN FAN MAIN FAN MOTOR RELAY-1 MAIN FAN RELAY-2 SUB FAN SUBFAN MOTOR RELAY-1...
  • Page 20 Diagnostics for A/C System Malfunction HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) • FOR LHD SOHC MODEL IGNITION BATTERY SWITCH AIR CONDITIONING RELAY HOLDER F/B No.17 SBF-4 SBF-1 F/B No.18 MAIN FAN MAIN FAN MOTOR RELAY SUB FAN RELAY SUB FAN CONDITIONING MOTOR RELAY PRESSURE...
  • Page 21 Diagnostics for A/C System Malfunction HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) • FOR RHD SOHC MODEL IGNITION BATTERY SWITCH AIR CONDITIONING RELAY HOLDER F/B No.17 SBF-4 SBF-1 F/B No.18 MAIN FAN MAIN FAN MOTOR RELAY SUB FAN RELAY SUB FAN CONDITIONING MOTOR RELAY B255...
  • Page 22 Diagnostics for A/C System Malfunction HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) Step Check CHECK FUSE. Is the fuse blown-out? Replace the fuse. Go to step 2. 1)Turn the ignition switch to OFF. 2)Remove the No. 2 fuse in main fuse box. 3)Check the condition of fuse.
  • Page 23 Diagnostics for A/C System Malfunction HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) Step Check CHECK POOR CONTACT. Is there poor contact in main Repair the poor Go to step 9. Check poor contact in main fan motor connec- fan motor connector? contact in main fan tor.
  • Page 24 Diagnostics for A/C System Malfunction HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) Step Check CHECK CONNECTION OF ASPIRATOR Is the connection of aspirator Repair the aspira- Go to step 17. DUCT. duct correct? tor duct connec- Make sure the connection of aspirator duct is tion.

  • Page 25: 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 AC-00675...
  • Page 26 Diagnostic Procedure for Actuators HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) Step Check CHECK FUSE. Is the fuse blown-out? Replace the fuse. Go to step 2. 1)Remove the No. 17 fuse in fuse & relay box. 2)Check the condition of fuse. CHECK SIGNAL VOLTAGE. Is the voltage less than 1 V? Go to step 3.
  • Page 27 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 28 Diagnostic Procedure for Actuators HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) Step Check CHECK POWER SUPPLY FOR AUTO A/C Is the voltage more than 10 V? Go to step 2. Replace the auto CONTROL MODULE SIDE. A/C control mod- 1)Turn the ignition switch to ON. ule.
  • Page 29 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 30 Diagnostic Procedure for Actuators HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) Step Check CHECK POWER SUPPLY FOR AUTO A/C Is the voltage more than 10 V? Go to step 2. Replace the auto CONTROL MODULE SIDE. A/C control mod- 1)Turn the ignition switch to ON. ule.

  • Page 31: 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 32 Diagnostic Procedure for Sensors HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) Step Check CHECK AMBIENT SENSOR. Is the resistance approx. 2.2 Go to step 2. Replace the ambi- 1)Turn the ignition switch to OFF. kΩ at 25°C (77°F)? ent sensor. 2)Disconnect the connector from ambient sen- sor.
  • Page 33 Diagnostic Procedure for Sensors HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) B: IN-VEHICLE SENSOR TROUBLE SYMPTOM: • When turning the AUTO switch to ON, blower fan speed, outlet port and inlet port is not changed. • If the switch LED indicates that the sensor is malfunctioning, replace the A/C control module. The in-vehi- cle sensor is built into the A/C control module and cannot be replaced as a single unit.
  • Page 34 Diagnostic Procedure for Sensors HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) Step Check CHECK EVAPORATOR SENSOR. Is the resistance approx. 3.3 Go to step 2. Replace the evap- 1)Turn the ignition switch to OFF. kΩ at 20°C (68°F)? orator sensor. 2)Remove the glove box. 3)Disconnect the connector from evaporator sensor.
  • Page 35 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 36 Diagnostic Procedure for Sensors HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) Step Check CHECK INPUT VOLTAGE TO SUNLOAD Is the voltage approx. 5 V? Go to step 3. Go to step 2. SENSOR. 1)Turn the ignition switch to ON. 2)Measure the input voltage to sunload sensor. Connector &...

  • Page 37: 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 potentiometer (including links) Mode door actuator and potentiometer (including links)
  • Page 38 Symptom Related Diagnostic HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) AC(diag)-36...

Table of Contents