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B0050-2B






B0050-2B-DRIVER SEATBELT BUCKLE SENSOR - WIRES SHORTED TOGETHER





For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

When powered, the Occupant Restraint Controller (ORC) sends a test current across the Driver Seat Belt Buckle Switch circuits every 100 ms to verify the integrity of the switch and wiring. The DTC will set if the circuits are shorted together for 2.5 seconds and the code will transitions from active to stored when the current returns to normal range for five seconds. The front seat belt switches cannot be adjusted or repaired and, if ineffective or damaged, the entire front seat belt buckle-half unit must be replaced. The airbag warning lamp will display in the instrument cluster for this fault.

- When Monitored:
The ORC monitors the status of the seat belt switch circuits at power up and every 100 ms thereafter while the ignition is in on.

- Set Condition:
This DTC sets when the ORC detects the (R57) Driver Seat Belt Switch Sense circuit is shorted to ground or the seat belt switch and seat belt ground circuits become shorted together for more than 2.5 seconds. This DTC transitions from active to stored when the module sees a recovery from the shorted together condition for greater than five seconds.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Restraints System Pre-Diagnostic Procedure.

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?

ORC - ACTIVE DTC

- Go To 2

ORC - STORED DTC

- Perform the RESTRAINTS SYSTEM INTERMITTENT TEST. Restraints System Intermittent Condition Test.

2. CHECK (R57) DRIVER SEAT BELT SWITCH SENSE CIRCUIT FOR A SHORT TO GROUND





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 Driver Seat Belt Buckle Switch harness connector.

NOTE: Check the connectors - Clean and repair as necessary.

2. Measure the resistance of the (R57) Driver Seat Belt Switch Sense circuit between ground and the appropriate terminal of the Driver Seat Belt Buckle Switch harness connector.

Is the resistance below 5k Ohms?

Yes

- NOTE: If the short is found in the Seat Harness, do not attempt to repair the Seat Harness. Replace the Seat Harness.
- Replace the (R57) Driver Seat Belt Switch Sense circuit for a short to ground.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.

No

- Go To 3

3. CHECK (R57) DRIVER SEAT BELT SWITCH SENSE CIRCUIT FOR A SHORT TO THE (R59) DRIVER SEAT BELT SWITCH GROUND CIRCUIT




1. Measure the resistance between the (R57) Driver Seat Belt Switch Sense circuit and the (R59) Driver Seat Belt Switch Ground circuit at the appropriate terminals of the Driver Seat Belt Buckle Switch harness connector.

Is the resistance below 5k Ohms?

Yes

- NOTE: If the short is found in the Seat Harness, do not attempt to repair the Seat Harness. Replace the Seat Harness.
- Replace the (R57) Driver Seat Belt Switch Sense circuit for a short to the (R59) Driver Seat Belt Switch Ground circuit.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.

No

- Go To 4

4. CHECK OPERATION OF THE DRIVER SEAT BELT SWITCH
1. Replace the Driver Seat Belt Buckle Switch. Seat Belt Buckle - Removal.If the vehicle is equipped with the standard key ignition, follow this ignition on warning.

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.
If the vehicle is equipped with the keyless ignition, follow this ignition on warning.

WARNING: Disconnect the 12-volt battery wait two minutes before proceeding, remove the ORC fuses, connect the 12-volt battery, wait two minutes before proceeding. Cycle the ignition to the On position, then reconnect the ORC fuses. Wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

2. Connect the scan tool to the Data Link Connector - use the most current software available.
3. Use the scan tool and erase all codes in the ORC.
4. Perform ORC module reset. Access the Miscellaneous Function menu from the ORC ECU Overview screen on the scan tool to perform this operation.
5. Wait one minute, and read active codes.

Did the active B0050-2B-DRIVER SEATBELT BUCKLE SENSOR - WIRES SHORTED TOGETHER DTC 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 Occupant Restraint Controller (ORC). Occupant Restraint Controller - Removal.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.

No

- Repair is complete.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.

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