PROCEDURE
Note. Refer to " CHECK LIST FOR INTERVIEW ". CHECK LIST FOR INTERVIEW. >
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK PRE-INSPECTION. Ask the customer when and how the trouble occurred using the interview checklist. CHECK LIST FOR INTERVIEW. > Before performing diagnostics, check the components which might affect occupant detection system problems. INSPECTION GENERAL DESCRIPTION. > | Are the components that might affect occupant detection system problems normal? | Go to step 2. | Repair or replace each component. |
| 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. OPERATION READ DIAGNOSTIC TROUBLE CODE (DTC). > NOTE: If the communication function of the Subaru Select Monitor cannot be executed normally, check the communication circuit. COMMUNICATION FOR INITIALIZING IMPOSSIBLE INSPECTION, SUBARU SELECT MONITOR. > Record all DTCs and freeze frame data. | Is DTC displayed? | Go to step 4. | Go to step 3. |
| 3 PERFORM GENERAL DIAGNOSTICS. Perform the inspection using "General Diagnostic Table". INSPECTION GENERAL DIAGNOSTIC TABLE. > Perform the system calibration. SYSTEM CALIBRATION OPERATION, SUBARU SELECT MONITOR. > Perform the Clear Memory Mode. OPERATION CLEAR MEMORY MODE. > Perform the Inspection Mode. PROCEDURE INSPECTION MODE. > Read the DTC. OPERATION READ DIAGNOSTIC TROUBLE CODE (DTC). > Check the DTC is not displayed. | Do the occupant detection system warning light and airbag warning light go off after starting the engine? | Finish the diagnosis. | Check the combination meter circuit. DIAGNOSTIC PROCEDURE WHEN AIRBAG WARNING LIGHT ILLUMINATED. > |
| 4 PERFORM THE DIAGNOSIS. Refer to " LIST OF DIAGNOSTIC TROUBLE CODE (DTC) ." NOTE: For the DTC list, refer to " LIST OF DIAGNOSTIC TROUBLE CODE (DTC) ". LIST LIST OF DIAGNOSTIC TROUBLE CODE (DTC). > Correct the cause of trouble. Perform the Clear Memory Mode. OPERATION CLEAR MEMORY MODE. > Perform the Inspection Mode. PROCEDURE INSPECTION MODE. > Read the DTC. OPERATION READ DIAGNOSTIC TROUBLE CODE (DTC). > | Is DTC displayed? | Repeat step 4 until DTC is not shown. | Finish the diagnosis. |
| NOTE |
|---|
| If the communication function of the Subaru Select Monitor cannot be executed normally, check the communication circuit. COMMUNICATION FOR INITIALIZING IMPOSSIBLE INSPECTION, SUBARU SELECT MONITOR. > |
| NOTE |
|---|
| For the DTC list, refer to " LIST OF DIAGNOSTIC TROUBLE CODE (DTC) ". LIST LIST OF DIAGNOSTIC TROUBLE CODE (DTC). > |
BASIC DIAGNOSTIC PROCEDURE
Scheme 174
SRS AIRBAG SYSTEM
| CAUTION | All the airbag system wiring harnesses and connectors are colored yellow. Do not use the electrical test equipment on these circuits. Be careful not to damage the airbag system wiring harness and connector when servicing the occupant detection system. |
BATTERY
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
AIRBAG SYSTEM
Read the DTC of airbag system, and check that there is no malfunction in airbag system.
Standard: DTC is not displayed.
GENERAL TOOL
| TOOL NAME | REMARKS |
|---|---|
| Circuit tester | Used for measuring resistance, voltage and current. |
GENERAL TOOL
Scheme 175
Scheme 176
SENSOR DATA READ
Read the load cell sensor data when checking the list or analyzing the problem.
Scheme 177
- On the «Occupant Detection System» main menu screen, select the {Sensor Data Output} and press the [YES] key. NOTE: Do not touch the vehicle for approximately 20 seconds after pressing the [YES] key. Output value may be changed when sensing the pitching and vibration of the vehicle while reading sensor data output.
- When the sensor output value is displayed in the [*****], press the [YES] key to move to the main menu.
CLEAR MEMORY MODE
Clear the DTC stored in the occupant detection system module after repairing occupant detection system.
Note. After the breakdown is recovered, the breakdown code for completed recoveries are read out when the next breakdown occurs if the memory clear work is not performed.
- Select the {Occupant Detection System} on the main menu, and press the [YES] key.
- On the «Occupant Detection System» display screen, select {Clear Memory} and press the [YES] key.
- When the {Done} is shown on the display, DTCs will be cleared.
Note. When the {Cannot erase the DTC stored, perform the diagnosis according to trouble symptom} is shown, read the DTC and perform the diagnosis according to DTC. DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC). >
COMMUNICATION FOR INITIALIZING IMPOSSIBLE
DETECTING CONDITION
Defective harness connector
TROUBLE SYMPTOM
Communication is impossible between occupant detection control module and Subaru Select Monitor.
WIRING DIAGRAM
Scheme 178
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK IGNITION SWITCH. | Is the ignition switch ON? | Go to step 2. | Turn the ignition switch to ON, and select the occupant detection system mode using Subaru Select Monitor. |
| 2 CHECK BATTERY. Turn the ignition switch to OFF. Measure the battery voltage. | Is the voltage more than 11 V? | Go to step 3. | Charge or replace the battery. |
| 3 CHECK BATTERY TERMINAL. | Is there poor contact at battery terminal? | Repair or tighten the battery terminal. | Go to step 4. |
| 4 CHECK SUBARU SELECT MONITOR COMMUNICATION. Turn the ignition switch ON. Using the Subaru Select Monitor, check whether communication to other system can be executed normally. | Are the system name displayed on Subaru Select Monitor? | Go to step 8. | Go to step 5. |
| 5 CHECK OCCUPANT DETECTION CONTROL MODULE CONNECTOR. Turn the ignition switch to OFF. | Is the occupant detection control module connectors and body harness connectors are connected securely? | Go to step 6. | Connect the occupant detection control module connector and body harness connector. |
| 6 CHECK SUBARU SELECT MONITOR COMMUNICATION. WARNING: 1) Turn the ignition switch to OFF. Disconnect the occupant detection control module connector. Turn the ignition switch ON. Check whether communication to other systems can be executed normally. | Are the system name displayed on Subaru Select Monitor? | Replace the seat cushion frame assembly. REMOVAL Front Seat. > | Go to step 7. |
| 7 CHECK HARNESS CONNECTOR BETWEEN EACH CONTROL MODULE AND DATA LINK CONNECTOR. Turn the ignition switch to OFF. Disconnect the occupant detection control module connector (R212). Measure the resistance between data link connector and chassis ground. Connector & terminal (B40) No. 10 - Chassis ground | Is the resistance more than 1 ohms? | Go to step 8. | Repair or replace the harness connector between each control module and data link connector. Replace the harness without repairing the air-bag harness. |
| 8 CHECK THE OCCUPANT DETECTION SYSTEM CONTROL MODULE OUTPUT SIGNAL. Turn the ignition switch ON. Measure the voltage between occupant detection control module and chassis ground. Connector & terminal (B40) No. 10 (+) - Chassis ground (-) | Is the voltage less than 1 V? | Go to step 9. | Repair or replace the harness connector between each control module and data link connector. Replace the harness without repairing the air-bag harness. |
| 9 CHECK HARNESS CONNECTOR BETWEEN OCCUPANT DETECTION CONTROL MODULE AND DATA LINK CONNECTOR. Turn the ignition switch to OFF, disconnect the battery ground cable, and wait for more than 20 seconds. Measure the resistance between occupant detection control module connector and data link connector. Connector & terminal (R212) No. 2 - (B40) No. 10 | Is the resistance less than 10 ohms? | Go to step 10 . | Repair or replace the harness connector between occupant detection control module and data link connector. |
| 10 CHECK POWER SUPPLY CIRCUIT. Disconnect connector (AB53) from vehicle harness. Connect the test harness Z (AB53) to connector. Turn the ignition switch ON. (Engine OFF) Measure the voltage between connector (2Z) in the test harness Z and chassis ground. Connector & terminal (2Z) No. 2 (+) - Chassis ground (-) | Is the voltage more than 10 V? | Go to step 11 . | Repair or replace the vehicle harness. |
| 11 CHECK HARNESS CONNECTOR BETWEEN OCCUPANT DETECTION CONTROL MODULE AND CHASSIS GROUND. Turn the ignition switch to OFF. Measure the resistance between connector (2Z) in the test harness Z and chassis ground. Connector & terminal (2Z) No. 1 - Chassis ground | Is the resistance less than 10 ohms? | Go to step 12 . | Repair or replace the body harness. |
| 12 CHECK POOR CONTACT OF CONNECTORS. | Is there poor contact in the control module power supply, ground circuit and data link connector? | Replace the airbag harness. | Replace the seat cushion frame assembly. REMOVAL Front Seat. > |
| WARNING |
|---|
| 1) Turn the ignition switch to OFF. |
DIAGNOSTIC PROCEDURE - COMMUNICATION FOR INITIALIZING IMPOSSIBLE
Scheme 179
Note. After the ignition switch is ON, the passenger's airbag ON/OFF indicator light for both ON and OFF come on for approximately 6 seconds then turn off for approximately 2 seconds, and then either ON or OFF will be illuminated for occupants.
Recreate the circumstance by referring to the conditions described in the checklist.
| CAUTION | If any damage is observed for vehicle appearance, repair or replace before performing Inspection Mode. If the airbag has been deployed, repair or replace before performing Inspection Mode. |
LIST
| DTC No. | Display | Content of diagnosis | Index No. |
|---|---|---|---|
| 29 | 29 ODS Failure | Occupant detection module grounding circuit is faulty. Control module is faulty. Load cell sensor is faulty. Airbag harness is faulty. Seat harness is faulty. | DTC 29 ODS FAILURE . > |
| 37 | 37 Buckle Switch RH Failure | Buckle switch is shorted. Buckle switch is open. Seat harness is faulty. Control module is faulty. | DTC 37 BUCKLE SWITCH RH FAILURE . > |
| 29 | 29 Power Supply Failure | Seat harness is faulty. Airbag harness is faulty. Control module is faulty. Blown out of fuse | DTC 29 POWER SUPPLY FAILURE . > |
| 28 | 28 Adjustment / Inspection Halt | Calibration service is incomplete. Inspection service has been interrupted. Other diagnostic trouble code is entered. Seat position is incorrect. Seat installation is faulty. Material is stuck around seat. Weight for system calibration is faulty. Distortion of vehicle floor Backrest frame assembly is faulty. Seat cushion frame assembly is faulty. Out of range for temperature in the vehicle while adjustment. | DTC 28 ADJUSTMENT / INSPECTION HALT . > |
DIAGNOSTIC TROUBLE CODE (DTC) LIST