Home ReviewsRefund
Home/Subaru/Impreza WRX/Subaru Impreza WRX GD/GG рестайлинг 2 (2005-2007)/Repair manual/Airbag/Occupant Detection System (diagnostics)
Contents Section: Airbag All sections

Occupant Detection System (diagnostics) Subaru Impreza WRX GD/GG рестайлинг 2

Airbag 24 illustrations ~2581 words

PROCEDURE

StepCheckYesNo
1 CHECK WARNING LIGHT. Check if the airbag warning light in combination meter comes on.Does the airbag warning light come on?Go to step 2.Perform the diagnosis according to trouble symptoms.
2 CHECK INDICATION OF DTC. Turn the ignition switch to OFF. Connect the Subaru Select Monitor to data link connector. Turn the ignition switch to ON, and the Subaru Select Monitor power switch to ON. Read the DTC. < Ref. to OPERATION , Read Diagnostic Trouble Code (DTC). > NOTE: If the communication function of the Subaru Select Monitor cannot be executed normally, check the communication circuit. < Ref. to COMMUNICATION FOR INITIALIZING IMPOSSIBLE , INSPECTION, Subaru Select Monitor. > Record all DTCs and freeze frame data.Is DTC displayed?Go to step 3.Go to "Airbag Warning Light Failure" < Ref. to AIR-BAG WARNING LIGHT FAILURE . >
3 PERFORM DIAGNOSIS. Judge the possible cause from "List of Diagnostic Trouble Code (DTC)" < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . > Inspect using "Diagnostic Chart with Diagnostic Trouble Code (DTC)". Correct the cause of trouble. Perform the clear memory mode. < Ref. to OPERATION , Clear Memory Mode. > Perform the inspection mode. < Ref. to PROCEDURE , Inspection Mode. > Read whether the DTC is displayed on the screen.Is DTC displayed?Perform the procedure 1) to 5) in step 3.Finish the diagnosis.
NOTE
If the communication function of the Subaru Select Monitor cannot be executed normally, check the communication circuit. < Ref. to COMMUNICATION FOR INITIALIZING IMPOSSIBLE , INSPECTION, Subaru Select Monitor. >

BASIC DIAGNOSTIC PROCEDURE

Check List Sheet. Scheme 84

Scheme 84: Check List Sheet
Scheme 84: Check List Sheet

CAUTION

  1. If the seat cushion cover has been removed or replaced, be sure to perform the system calibration for occupant detection system after installing seat to the vehicle. < Ref. to «SYSTEM CALIBRATION (REZEROING)»(/subaru/impreza-wrx/gdgg-2-2005-2007/remont/airbag/#occupant-detection-system-diagnostics__system-calibration-rezeroing) , OPERATION, Subaru Select Monitor. > Failure to do so may cause improper operation of occupant detection system.
  2. Never remove the occupant detection control module of occupant detection system (passenger's side only) or pressure sensor from seat cushion frame since the control module and occupant detection sensor are fixed to the seat cushion frame.
  3. Do not replace the seat cushion pad as a single unit. Be sure to replace the seat cushion pad and frame assembly together. Since the seat cushion pad and cushion frame have been adjusted at factory, installing them together with parts for other vehicle or ones of other set may cause improper operation of occupant detection system.
  4. If the seat cushion cover has been removed, be sure to replace wire on the seat cushion cover side with a new one. (Passenger's seat)
  5. Never connect the battery in reverse polarity. The occupant detection system may be destroyed instantly.
  6. Do not disconnect the battery terminals while the engine is running. A large counter electromotive force will be generated in the generator, and this voltage may damage electronic parts such as occupant detection control module.
  7. Before disconnecting the connectors of each sensor and the control module, be sure to turn off the ignition switch and wait for more than 20 seconds. The occupant detection control module may be damaged.
  8. Every related part of occupant detection system is a precision part. Do not drop them. CAUTION: Airbag system connectors are colored yellow. Do not use the electrical test equipment on these circuits. Be careful not to damage the airbag system wiring harness when servicing the occupant detection system. Refer to the CAUTION for airbag system when repairing the occupant detection system. < Ref. to «CAUTION»(/subaru/impreza-wrx/gdgg-2-2005-2007/remont/airbag/#airbag-system) , General Description. >

INSPECTION

Measure the battery voltage and specific gravity of electrolyte, and check the electrolyte amount.

Standard voltage: 12 V or more

Specific gravity: 1.260 or more

Electrolyte: Between the upper level and lower level

PREPARATION TOOL

CAUTIONTo measure the voltage and resistance of airbag system and occupant detection system components, be sure to use the specified test harness.

SPECIAL TOOL

SPECIAL TOOL DESCRIPTION ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS 18482AA010 (Newly adopted tool) CARTRIDGE Troubleshooting for electrical systems. 22771AA030 SUBARU SELECT MONITOR KIT Troubleshooting for electrical systems

Scheme 85

Scheme 85: SPECIAL TOOL
Scheme 85: SPECIAL TOOL

Scheme 86

Scheme 86
Scheme 86

Scheme 87

Scheme 87
Scheme 87

Scheme 88

Scheme 88
Scheme 88

Scheme 89

Scheme 89
Scheme 89

Scheme 90

Scheme 90
Scheme 90

Scheme 91

Scheme 91
Scheme 91

Scheme 92

Scheme 92
Scheme 92

Scheme 93

Scheme 93
Scheme 93

Scheme 94

Scheme 94
Scheme 94

Scheme 95

Scheme 95
Scheme 95

Scheme 96

Scheme 96
Scheme 96

Scheme 97

Scheme 97
Scheme 97
  1. TEST HARNESS D TEST HARNESS D DESCRIPTION ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS 98299AG060 TEST HARNESS D Used for measuring voltage and resistance of front seat belt buckle switch. (Scheme 85): Identifying Test Harness D
  2. TEST HARNESS U TEST HARNESS U DESCRIPTION ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS 98299AG000 TEST HARNESS U Used for measuring voltage and resistance of airbag control module. (Scheme 86): Identifying Test Harness U
  3. TEST HARNESS Y TEST HARNESS Y DESCRIPTION ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS 98299AG040 TEST HARNESS Y Used for diagnosing seat belt buckle switch. (Scheme 87): Identifying Test Harness Y
  4. TEST HARNESS AB TEST HARNESS AB DESCRIPTION ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS 98299XA000 TEST HARNESS AB Used when measuring voltage and resistance of occupant detection system (Scheme 88): Identifying Test Harness AB
  5. TEST HARNESS AE TEST HARNESS AE DESCRIPTION ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS 98299XA030 TEST HARNESS AE Adapter harness for TEST HARNESS Y. Used for diagnosing seat belt buckle switch. (Scheme 89): Identifying Test Harness AE
  6. TEST HARNESS AC TEST HARNESS AC DESCRIPTION ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS 98299XA010 TEST HARNESS AC Used for diagnosing seat belt tension sensor. (Scheme 90): Identifying Test Harness AC
  7. TEST HARNESS AD TEST HARNESS AD DESCRIPTION ILLUSTRATION TOOL NUMBER DESCRIPTION REMARKS 98299XA020 TEST HARNESS AD Used when measuring voltage and resistance of seat belt tension sensor. (Scheme 91): Identifying Test Harness AD

GENERAL TOOL

TOOL NAMEREMARKS
Circuit testerUsed for measuring resistance, voltage and current.

GENERAL TOOL DESCRIPTION

Airbag Warning Light Illumination Pattern. Scheme 98

Fig. 9: Identifying Occupant Detection System Electrical Component Location (1 Of 3)
Scheme 9: Identifying Occupant Detection System Electrical Component Location (1 Of 3)

Passenger Airbag ON/OFF Indicator Light Illumination Pattern. Scheme 99

Fig. 10: Identifying Occupant Detection System Electrical Component Location (2 Of 3)
Scheme 10: Identifying Occupant Detection System Electrical Component Location (2 Of 3)

Wiring Diagram - Belt Pretensioner Failure. Scheme 100

Fig. 11: Identifying Occupant Detection System Electrical Component Location (3 Of 3)
Scheme 11: Identifying Occupant Detection System Electrical Component Location (3 Of 3)

BUCKLE SWITCH

Scheme 101

Scheme 101: PROCEDURE
Scheme 101: PROCEDURE

Scheme 102

Scheme 102
Scheme 102
  1. How to disconnect Move the slide lock (A) in the direction of arrow. With the slide lock (A) moved, disconnect the connector. (Scheme 95): Disconnecting Connector CAUTION: When pulling the slide lock or disconnecting connector, be sure to hold the connector, not the harness.
  2. How to connect Holding the connector (A), and push it in securely until a clicking sound is heard. (Scheme 96): Connecting Connector CAUTION: Be sure to insert the connector in until it is locked. Then pull it gently to make sure that it is locked.

ELECTRICAL SPECIFICATION

CAUTIONThe occupant detection control module, load cell sensor and seat frame are integrated, therefore, do not remove them. It is prohibited to measure the occupant detection control module I/O signal. Therefore, terminal No. is not shown here.
Terminal NameInput/Output valueRemarks
IG - Power supply9 - 16 VWhen ignition switch ON
Airbag control module communication(COM)Open collector terminalCommunication line
Airbag control module communication(GND)0 VGround
Belt tension sensor(Vcc)0 - 5VBelt tension sensor power supply
(Vout)0.5 - 4.5 VSensor output voltage
(GND)0 VSensor ground

TERMINALS REFERENCE

WIRING DIAGRAM

Refer to the electrical wiring diagram. < Ref. to AIRBAG SYSTEM in SYSTEM WIRING DIAGRAMS . >

READ DIAGNOSTIC TROUBLE CODE (DTC)

When malfunction of airbag system and occupant detection system occurs, the DTC stored in airbag control module will be read out.

Refer to "Read Diagnostic Trouble Code (DTC)" in AIRBAG SYSTEM (DIAGNOSTICS). < Ref. to OPERATION , Subaru Select Monitor. >

Note. For details concerning operation procedure, refer to the SUBARU SELECT MONITOR OPERATION MANUAL. For details concerning DTCs, refer to the "List of Diagnostic Trouble Code (DTC)" (Airbag system, occupant detection system). < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . > < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >

STATUS DATA DISPLAY

Check the operating condition of each sensor in the event of malfunction in seat belt buckle switch and seat position sensor, or when the seat belt buckle switch and seat position sensor has been replaced.

  1. On the «Main Menu» display screen, select the {Each System Check} and press the [YES] key.
  2. On the «System Selection Menu» display screen, select the {Airbag System} and press the [YES] key.
  3. On the «Airbag System» display screen, select the {Status Data} and press the [YES] key. The support data is shown in the following table. STATUS DATA Item Contents of diagnosis Seat position sensor LH Front (1) /Rear (2) /Other (3) /Unknown (3) /- (5) Seat position sensor RH - (5) Seat belt buckle switch LH Belted (6) /Unbelted (7) /Other (8) /Unknown (4) /- (9) Seat belt buckle switch RH Belted (6) /Unbelted (7) /Other (8) /Unknown (4) /- (9) Passenger's airbag status ON (10) /OFF (11) /Unknown (4) (1) The seat position is forward. (2) The seat position is rearward. (3) It is displayed when data other than forward and backward positions of the seat, such as malfunction etc., is input. (4) It is displayed at the initial status. (5) Seat position sensor is not available. (6) Seat belt is fastened. (7) Seat belt is unfastened. (8) It is displayed when data other than fastened or unfastened belts, such as malfunction etc., is input. (9) Seat belt buckle switch is not available. (10) Passenger's airbag is active. (11) Passenger's airbag is not active. NOTE: For details concerning operation procedure, refer to the SUBARU SELECT MONITOR OPERATION MANUAL.

CLEAR MEMORY MODE

Clear the DTC stored in the airbag control module after repairing malfunction in airbag system and occupant detection system. If the memory is not cleared after repairing malfunction, repaired DTC will be read out again when a new malfunction occurs.)

  1. On the «Main Menu» display screen, select the {Each System Check} and press the [YES] key.
  2. On the «System Selection Menu» display screen, select the {Airbag System} and press the [YES] key.
  3. On the «Airbag System» display screen, select the {Clear Memory} and press the [YES] key.
  4. Press the [YES] key after the "Clear memory?" has been displayed.
  5. When the "Done" is shown on the display screen, turn the Subaru Select Monitor switch to OFF. NOTE: For details concerning operation procedure, refer to the SUBARU SELECT MONITOR OPERATION MANUAL.

SYSTEM CALIBRATION (REZEROING)

Note. If the occupant detection system has been removed or the passenger's seat cushion cover has been removed and disassembled, be sure to perform the "System Calibration (Rezeroing)" after installing the seat to the vehicle.

CAUTIONIf the system malfunction occurs during the calibration, 2A "ODS Calibration Error" is detected on DTC of airbag system and the airbag warning light comes on. In this case, perform the system calibration (Rezeroing) again after turning the ignition switch to OFF once, or perform the system calibration after repairing the trouble cause.

Scheme 103

Scheme 103
Scheme 103
  1. Set the vehicle on a level surface without any passengers.
  2. On the «Main Menu» display screen, select the {Each System Check} and press the [YES] key.
  3. On the «System Selection Menu» display screen, select the {Occupant Detection System} and press the [YES] key.
  4. On the «Occupant Detection System» display screen, select the {Re-zeroing} and press the [YES] key.
  5. « Check vehicle condition for successfully completing the rezeroing.» will be displayed on the screen. Inspect the following items to adjust the vehicle conditions. Move the seat backrest in the upright position. Slide to the backmost position. Put nothing on the seat cushion. Sit on the seat cushion and tidy the seat cloth. Make sure that passenger's seat belt is not inserted into buckle, pulled or not stuck. Make sure the ambient temperature is within 0 - 40°C (32 - 104°F).
  6. «Re-zeroing Adjust the passenger seat to the condition shown in service manual.» will be displayed on the screen. Slide the passenger's seat to the backmost position, make sure that the backrest is in the upright position, and then press the [YES] key. (Scheme 97): Identifying System Calibration (Rezeroing)
  7. When the «Re-zeroing Unbelt the Passenger seat belt. Continue: "YES", Quit: "NO"» is displayed on the screen, make sure that passenger's seat belt is released from buckle and press the [YES] key.
  8. When the «Re-zeroing Empty the passenger seat. Continue: "YES", Quit: "NO"» is displayed on the screen, make sure that no one is on the passengers seat, the airbag OFF indicator comes on and the ON indicator goes off, and then press the [YES] key. NOTE: After pressing the [YES] key, «In process... Please wait for a while without touching vehicle.» will be displayed. Do not touch and swing the vehicle while the message is displayed. When the «Zero calibration is unsuccessful. Press "YES" to END» is displayed during the calibration, go to step 10.
  9. If the zero calibration is successfully completed, the «Re-zeroing is successfully completed. Press "YES" to END» will be displayed. Press the [YES] key and turn the ignition switch to OFF to finish the diagnosis.
  10. When the «Zero calibration is unsuccessful. Press "YES" to END» is displayed during the calibration, turn the ignition switch to OFF once and turn it back to ON. Then, read the DTC of airbag system. < Ref. to «OPERATION»(/subaru/impreza-wrx/gdgg-2-2005-2007/remont/airbag/#airbag-system-diagnostics__operation), Subaru Select Monitor. > If the DTC is input, perform the system calibration after repairing malfunction. If the DTC is not input, check the status of seat and vehicle and perform the system calibration again. < Ref. to «SYSTEM CALIBRATION (REZEROING)»(/subaru/impreza-wrx/gdgg-2-2005-2007/remont/airbag/#occupant-detection-system-diagnostics__system-calibration-rezeroing), OPERATION, Subaru Select Monitor. > NOTE: If the zero calibration is unsuccessful, malfunction may occur in occupant detection system, or the status of seat and vehicle may not be appropriate. Also, if the airbag warning light comes on, read the DTC and perform the diagnosis referring to the "List of Diagnostic Trouble Code (DTC)" in AIRBAG SYSTEM. < Ref. to «OPERATION»(/subaru/impreza-wrx/gdgg-2-2005-2007/remont/airbag/#airbag-system-diagnostics__operation), Subaru Select Monitor. > < Ref. to «LIST OF DIAGNOSTIC TROUBLE CODE (DTC)»(/subaru/impreza-wrx/gdgg-2-2005-2007/remont/airbag/#airbag-system-diagnostics). >

COMMUNICATION FOR INITIALIZING IMPOSSIBLE

DETECTING CONDITION

Defective harness connector

TROUBLE SYMPTOM

Communication is impossible between airbag control module and Subaru Select Monitor.

Refer to "COMMUNICATION FOR INITIALIZING IMPOSSIBLE" in AIRBAG SYSTEM (DIAGNOSTICS). < Ref. to INSPECTION , Subaru Select Monitor. >

WITHOUT DTC

DETECTING CONDITION

  1. Defective combination meter
  2. Open circuit of harness

TROUBLE SYMPTOM

  1. Airbag warning light does not go off.
  2. "NO TROUBLE CODE" is displayed on Subaru Select Monitor display screen.

For detailed operation procedure, refer to "Airbag Warning Light Failure". < Ref. to AIRBAG WARNING LIGHT FAILURE . >

Note. When the airbag warning light is OFF and "NO TROUBLE CODE" is displayed on Subaru Select Monitor, the system is in normal condition.

OPERATION

For details about reading of DTCs, refer to "Subaru Select Monitor". < Ref. to SUBARU SELECT MONITOR . >

Recreate the circumstance by referring to the conditions described in the checklist.

Clear the memory in the following steps after the malfunction is repaired.

Refer to "Subaru Select Monitor" for details concerning DTC clear operation. < Ref. to SUBARU SELECT MONITOR . >

Turn the ignition switch to ON, and confirm that the airbag warning light remains on for approx. 6 seconds then go off afterwards.

Scheme 98: Airbag Warning Light Illumination Pattern
Scheme 98: Airbag Warning Light Illumination Pattern
Scheme 99: Passenger Airbag ON/OFF Indicator Light Illumination Pattern
Scheme 99: Passenger Airbag ON/OFF Indicator Light Illumination Pattern

LIST

DTCDisplayContents of diagnosisReference target
2AODS Calibration ErrorThe system calibration (Rezeroing) is not completed successfully.< Ref. to DTC 2A: ODS CALIBRATION ERROR . >
2BODS System Wrong PartsAirbag control module is wrong parts. Occupant detection system is wrong parts. Occupant detection system is faulty.< Ref. to DTC 2B: ODS SYSTEM WRONG PARTS . >
2CBelt Tension Sensor FailurePassenger's belt tension sensor malfunction Side airbag harness circuit is open or shorted. Occupant detection system is faulty. Occupant detection harness is faulty.< Ref. to DTC 2C: BELT PRETENSIONER FAILURE . >
27ODS Communication ErrorThe communication of occupant detection control module and airbag control module is faulty. Side airbag harness circuit is open or shorted. Shorted to ground and power supply. Occupant detection harness is faulty. Occupant detection system is malfunction. Airbag control module is faulty.< Ref. to DTC 27: ODS COMMUNICATION ERROR . >
29ODS FailureLoad cell sensor is faulty. Occupant detection control module is faulty. Occupant detection harness is faulty. Fuse No. 25 (in joint box) is blown.< Ref. to DTC 29: ODS FAILURE . >
37Buckle Switch RH FailurePassenger's buckle switch circuit is open, shorted or shorted to ground. Occupant detection system is faulty. Occupant detection harness is faulty.< Ref. to DTC 37: BUCKLE SWITCH RH FAILURE . >

DIAGNOSTIC TROUBLE CODE

DTC 2A: ODS CALIBRATION ERROR

DTC DETECTING CONDITION

The system calibration (Rezeroing) is not completed successfully.

StepCheckYesNo
1 PERFORM ZERO CALIBRATION. Perform the system calibration using the Subaru Select Monitor. < Ref. to OPERATION , Subaru Select Monitor. >Is the system calibration completed successfully?Finish the diagnosis.Perform according to system calibration procedure. < Ref. to OPERATION , Subaru Select Monitor. >

DIAGNOSTIC PROCEDURE

DTC 2B: ODS SYSTEM WRONG PARTS

DTC DETECTING CONDITION

  1. Airbag control module is wrong parts.
  2. Occupant detection system is wrong parts. DIAGNOSTIC PROCEDURE Step Check Yes No 1 CHECK OCCUPANT DETECTION SYSTEM. Turn the ignition switch to OFF, disconnect the battery ground cable, and wait more than 20 seconds. Replace the passenger's seat cushion pad & seat cushion frame assembly. < Ref. to «REMOVAL»(/subaru/impreza-wrx/gdgg-2-2005-2007/remont/seats/#seats) , Front Seat. > < Ref. to «DISASSEMBLY»(/subaru/impreza-wrx/gdgg-2-2005-2007/remont/seats/#seats__disassembly) , Front Seat. > Connect the ground cable to battery. Connect the Subaru Select Monitor to data link connector, and then check the system calibration. < Ref. to «OPERATION»(/subaru/impreza-wrx/gdgg-2-2005-2007/remont/airbag/#occupant-detection-system-diagnostics__operation) , Subaru Select Monitor. > Is the system calibration completed successfully? Finish the diagnosis. Go to step 2. 2 CHECK AIRBAG CONTROL SYSTEM. Turn the ignition switch to OFF, disconnect the battery ground cable, and wait more than 20 seconds. Replace the airbag control module. < Ref. to «REMOVAL»(/subaru/impreza-wrx/gdgg-2-2005-2007/remont/airbag/#airbag-system) , Side Airbag Module. > Connect the ground cable to battery. Connect the Subaru Select Monitor to data link connector, and then check the system calibration. < Ref. to «OPERATION»(/subaru/impreza-wrx/gdgg-2-2005-2007/remont/airbag/#occupant-detection-system-diagnostics__operation) , Subaru Select Monitor. > Is the system calibration completed successfully? Finish the diagnosis. Check between occupant detection control module and airbag control module.

DTC 2C: BELT PRETENSIONER FAILURE

DTC DETECTING CONDITION

  1. Passenger's belt tension sensor failure
  2. Airbag main harness circuit is open or shorted.
  3. Occupant detection control module is faulty.

WIRING DIAGRAM

Scheme 100: Wiring Diagram - Belt Pretensioner Failure
Scheme 100: Wiring Diagram - Belt Pretensioner Failure
StepCheckYesNo
1 CHECK POOR CONTACT OF CONNECTORS. Check the connector between occupant detection control module and belt tension sensor for poor contact.Is there poor contact?Reconnect the connector. If the fault is not corrected, replace the airbag harness.Go to step 2.
2 CHECK BELT TENSION SENSOR. Turn the ignition switch to OFF, disconnect the battery ground cable, and wait more than 20 seconds. Disconnect the belt tension sensor connector (AB63) from airbag harness. Connect the test harness AC to connector (AB63). Connect the battery ground cable and turn the ignition switch to ON.Does the airbag warning light illuminates for 6 seconds then go off?Replace the seat belt outer. < Ref. to REMOVAL , Front Seat Belt. >Go to step 3.
3 CHECK AIRBAG HARNESS. Turn the ignition switch to OFF, disconnect the battery ground cable, and wait more than 20 seconds. Disconnect the test harness AC from belt tension sensor connector (AB63). Connect the test harness AD (1AD) to connector (AB63). Disconnect the airbag harness connector (AB62), and connect the connector (1AB) in test harness AB. Measure the resistance between test harness terminals. Connector & terminal (2AB) No. 5 - (2AD) No. 1: (2AB) No. 4 - (2AD) No. 3: (2AB) No. 6 - (2AD) No. 2Is the resistance less than 10 ohms?Go to step 4.Replace the airbag harness.
4 CHECK AIRBAG HARNESS. Measure the resistance between test harness terminals and between test harness terminal and chassis ground. Connector & terminal (2AB) No. 4 - (2AD) No. 1: (2AB) No. 4 - (2AD) No. 2: (2AB) No. 4 - Chassis ground: (2AB) No. 5 - (2AD) No. 2: (2AB) No. 5 - Chassis groundIs the resistance more than 1 Mohms?Go to step 5.Replace the airbag harness.
5 CHECK AIRBAG HARNESS. Connect the battery ground cable and turn the ignition switch to ON. Measure the voltage between test harness and chassis ground. Connector & terminal (2AD) No. 1 - Chassis ground: (2AD) No. 3 - Chassis groundIs the voltage less than 1 V?Replace the airbag harness.Check the occupant detection harness and replace it if faulty. Replace the seat cushion frame assembly if the occupant detection harness is not faulty. < Ref. to DISASSEMBLY , Front Seat. >

DIAGNOSTIC PROCEDURE

DTC 27: ODS COMMUNICATION ERROR

Perform the diagnosis using the diagnostic procedure for airbag system. < Ref. to DTC 27: ODS COMMUNICATION ERROR . >

DTC 29: ODS FAILURE

DTC DETECTING CONDITION

  1. Load cell sensor is faulty.
  2. Occupant detection control module is faulty.
  3. Occupant detection harness is faulty.
  4. Side airbag harness is faulty.
  5. Fuse No. 25 (in joint box) is blown. DIAGNOSTIC PROCEDURE Step Check Yes No 1 CHECK POOR CONTACT IN CONNECTOR. Check the connector between occupant detection control module and airbag control module for poor contact. Is there poor contact? Reconnect the connector. If the fault is not corrected, replace the airbag harness. Go to step 2. 2 CHECK DTC. Read the DTC of airbag system. Is "2C BELT TENSION SENSOR FAILURE" or "37 BUCKLE SWITCH RH FAILURE" displayed in DTC? Perform the diagnosis according to each DTC. Check the occupant detection harness and replace it if faulty. If the fault is not corrected, replace the occupant detection system. < Ref. to «DISASSEMBLY»(/subaru/impreza-wrx/gdgg-2-2005-2007/remont/seats/#seats__disassembly) , Front Seat. >

DTC 37: BUCKLE SWITCH RH FAILURE

DTC DETECTING CONDITION

  1. Passenger's buckle switch circuit is open, shorted or shorted to ground.
  2. Seat harness circuit is open, shorted or shorted to ground.
  3. Occupant detection control module is faulty.

WIRING DIAGRAM

Scheme 104

Fig. 18: Wiring Diagram - Buckle Switch RH Failure
Scheme 18: Wiring Diagram - Buckle Switch RH Failure
StepCheckYesNo
1 CHECK POOR CONTACT IN CONNECTOR. Check the connector between occupant detection control module and buckle switch for poor contact.Is there poor contact?Reconnect the connector. If the fault is not corrected, replace the airbag harness.Go to step 2.
2 CHECK BUCKLE SWITCH. Turn the ignition switch to OFF, disconnect the battery ground cable, and wait more than 20 seconds. Disconnect the buckle switch connector (AB66). Connect the test harness AE (1AE) and test harness connector Y to the buckle switch connector (AB66). Connect the battery ground cable and turn the ignition switch to ON.Does the airbag warning light illuminates for 6 seconds then go off?Replace the buckle switch. < Ref. to REMOVAL , Front Seat Belt. >Check the occupant detection harness and replace it if faulty. If the fault is not corrected, replace the occupant detection system.

DIAGNOSTIC PROCEDURE

More articles — Restraints