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B0050-11






B0050-11-DRIVER SEATBELT BUCKLE SENSOR - CIRCUIT SHORT TO GROUND





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 Switch circuits every 100ms to verify the integrity of the switch and wiring. The DTC will set if the circuits are shorted together or to ground 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:
While the ignition on and the Occupant Restraint Controller (ORC) is configured for a Driver Seat Belt Switch, the ORC checks the switch input current ranges. The ORC monitors the switch input current ranges at power up and continuously every 100ms.

- Set Condition:
If the ORC detects the driver seat belt buckle switch circuits have been shorted to ground for 2.5 seconds. The active code will change to stored after the ORC verifies the seat belt switch sense circuit voltage has returned to normal voltage range for five seconds.





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

1. VERIFY ACTIVE DTC

NOTE: Make sure the battery is fully charged.

1. Turn the ignition on.
2. With the scan tool, read ORC DTCs.

Does the scan tool display B0050-11-DRIVER SEATBELT BUCKLE SENSOR - CIRCUIT SHORT TO GROUND DTC as active?

Yes

- Go To 2

No

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

2. CHECK DRIVER SEAT BELT BUCKLE SWITCH CIRCUITS 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 connectors - Clean and repair as necessary.

2. Measure the resistance of the (R57) Driver Seat Belt Buckle Switch Sense circuit between the appropriate terminal of the Driver Seat Belt Buckle Switch harness connector and ground.
3. Measure the resistance of the (R59) Driver Seat Belt Buckle Switch Ground circuit between the appropriate terminal of the Driver Seat Belt Switch harness connector and ground.

Is the resistance below 10k Ohms on any of these circuits?

Yes

- Repair the (R57) or (R59) Driver Seat Belt Buckle Switch circuits for a short to ground.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.

No

- Go To 3

3. CHECK THE DRIVER SEAT BELT SWITCH CIRCUITS FOR A SHORT TO GROUND




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

Is the resistance below 10k Ohms on any of these circuits?

Yes

- Repair the (R57) Driver Seat Belt Buckle Switch Sense circuit for a short to the (R59) Driver Seat Belt Buckle 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 BUCKLE SWITCH
1. Replace the Driver Seat Belt Buckle Switch. Seat Belt Buckle - Removal.
2. Reconnect the vehicle body harness connector to the Driver Seat Belt Buckle Switch.
3. Remove any special tools or jumper wires and reconnect all previously disconnected components - except the Battery.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.

4. Connect the scan tool to the Data Link Connector - use the most current software available.
5. Use the scan tool and erase the stored codes in all airbag system modules.
6. Turn the Ignition OFF, and wait 15 seconds before turning the Ignition ON.
7. Wait one minute, and read active DTCs and if there are none present read the stored DTCs.

Does the scan tool display active B1B50-1st ROW DRIVER SEAT BELT SENSOR CIRCUIT SHORT LOW DTC?

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.

- WARNING: If the Occupant Restraint Controller (ORC) is dropped at any time, it must be replaced. Failure to follow these instructions may result in possible serious or fatal injury.

- Replace the Occupant Restrain 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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