B0052
B0052-13-PASSENGER SEATBELT SENSOR-CIRCUIT OPEN
Special Tools:
For a complete wiring diagram, refer to the Wiring Information.
Theory of Operation
When powered, the Occupant Restraint Controller (ORC) sends a test current to the belt switches to verify the integrity of the switch and wiring. The use of the SRS Load Tool Adapter provides a test point, as well as a method for opening the shorting bar connections within the harness connector. (8443-57) in the tests below provides a test point in place of the module.
- When Monitored:
The ORC monitors the status of the seat belt switch circuits at power up and every 50 ms thereafter while the ignition is in on.
- Set Condition:
This DTC sets when the ORC detects the seat belt switch circuits have become open or shorted to voltage for more than 2.5 seconds. This DTC transitions from active to stored when the module sees a recovery from the open or shorted to voltage condition for greater than 4.5 seconds.
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Restraint System Pre-Diagnostic Procedure.
Diagnostic Test
1. DETERMINE ACTIVE OR STORED DTC
NOTE: Make sure the battery is fully charged.
1. Turn the ignition on.
2. With the scan tool, read all active ORC DTCs.
Is the DTC active or stored?
ACTIVE DTC
- Go To 2
STORED DTC
- Perform the RESTRAINTS SYSTEM INTERMITTENT TEST. Restraint System Intermittent Condition Test.
2. CHECK FOR ADDITIONAL ACTIVE SENSOR DTCS
1. With the scan tool, read all active ORC DTCs.
Are DTCs B2734-13-PASSENGER OCCUPANT DETECTION SENSOR-CIRCUIT OPEN active?
Yes
- Repair or replace the (R730) Passenger Seat Detection Return circuit for an open or short to battery.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraint System Verification Test.
No
- Go To 3
3. CHECK (R58) PASSENGER SEAT BELT SWITCH SENSE CIRCUIT FOR A SHORT TO VOLTAGE
WARNING:
Turn the ignition off, disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
1. Disconnect the Passenger Seat Belt-Buckle Tensioner/Switch connector.
2. Disconnect the ORC C1 and C2 connectors.
NOTE: Check the connectors - Clean and repair as necessary.
3. Connect the SRS Load Tool Adapter to the ORC C1 and C2 connectors. (8443-57)
WARNING:
Turn the ignition on, then reconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
4. Measure the voltage of the (R58) Passenger Seat Belt Switch Sense circuit between the SRS Load Tool Adapter cavity C2-20 and ground. (8443-57)
Is there any voltage present on the circuit?
Yes
WARNING:
Turn the ignition off, disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
NOTE: If the short is found in the Seat Harness, do not attempt to repair the Seat Harness. Replace the Seat Harness.
- Repair or replace the (R58) Passenger Seat Belt Switch Sense circuit for a short to voltage.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraint System Verification Test.
No
- Go To 4
4. CHECK (R730) PASSENGER SEAT DETECTION RETURN CIRCUIT FOR A SHORT TO VOLTAGE
1. Disconnect the Passenger Occupant Detection Sensor and Passenger Seat Track Position Sensor connectors.
NOTE: Check the connectors - Clean and repair as necessary.
2. Measure the voltage of the (R730) Passenger Seat Detection Return circuit between the SRS Load Tool Adapter C2-19 and ground. (8443-57)
Is there any voltage present on the circuit?
Yes
WARNING:
Turn the ignition off, disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
NOTE: If the short is found in the Seat Harness, do not attempt to repair the Seat Harness. Replace the Seat Harness.
- Repair or replace the (R730) Passenger Seat Detection Return circuit for a short to voltage.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraint System Verification Test.
No
- Go To 5
5. CHECK (R58) PASSENGER SEAT BELT SWITCH SENSE CIRCUIT FOR AN OPEN
WARNING:
Turn the ignition off, disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
1. Measure the resistance of the (R58) Passenger Seat Belt Switch Sense circuit between the Passenger Seat Belt-Buckle Tensioner/Switch connector and the SRS Load Tool Adapter C2-20. (8443-57).
Is the resistance below 1.0 Ohm?
Yes
- Go To 6
No
NOTE: If the open is found in the Seat Harness, do not attempt to repair the Seat Harness. Replace the Seat Harness.
- Repair or replace the (R58) Passenger Seat Belt Switch Sense circuit for an open. Then, Go To Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraint System Verification Test.
6. CHECK (R730) PASSENGER SEAT DETECTION RETURN CIRCUIT FOR AN OPEN
1. Measure the resistance of the (R730) Passenger Seat Detection Return circuit between the Passenger Seat Belt-Buckle Tensioner/Switch connector and the SRS Load Tool Adapter C2-19. (8443-57).
Is the resistance below 1.0 Ohm?
Yes
- Go To 7
No
NOTE: If the open is found in the Seat Harness, do not attempt to repair the Seat Harness. Replace the Seat Harness.
- Repair or replace the (R730) Passenger Seat Detection Return circuit for an open.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraint System Verification Test.
7. CHECK OPERATION OF PASSENGER SEAT BELT SWITCH
1. Replace the Passenger Seat Belt-Buckle Tensioner/Switch connector.
2. Reconnect the ORC C1 and C2 connectors.
WARNING:
Turn the ignition on, then reconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
3. Connect the scan tool to the Data Link Connector - use the most current software available.
4. Use the scan tool and erase all codes in the ORC.
5. Perform ORC module reset. Access the Miscellaneous Function menu from the ORC ECU Overview screen on the scan tool to perform this operation.
6. Wait one minute, and read active codes.
Did the active B0052-13-PASSENGER SEATBELT SENSOR-CIRCUIT OPEN return?
Yes
WARNING:
If the Occupant Restraint Controller (ORC) is dropped at any time, it must be replaced. Failure to take the proper precautions can result in accidental airbag deployment. Failure to follow these instructions may result in possible serious or fatal injury.
WARNING:
Turn the ignition off, disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
- Replace the ORC.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraint System Verification Test.
No
- Repair is complete.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraint System Verification Test.