Driver Seat Belt Switch Short To Ground

DRIVER SEAT BELT SWITCH SHORT TO GROUND





For a complete wiring diagram Consult Diagrams/Electrical.

Theory of Operation

When powered, the Occupant Restraint Controller (ORC) sends a test current across the Passenger Seat Belt Switch circuits every 60 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 return to normal range for 5 seconds.

- When Monitored:
While the ignition on and the Occupant Classification Module (ORC) configured for a Driver Seat Belt Switch, the Occupant Restraint Controller (ORC) module checks the switch input current ranges.

- Set Condition:
If the ORC detects the passenger seat belt buckle switch circuits shorted to ground.





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

Diagnostic Test

1. VERIFY ACTIVE DRIVER SEAT BELT SWITCH CIRCUIT LOW
Turn the ignition on.
With the scan tool, read ORC DTCs.

NOTE: Ensure the battery is fully charged.

Does the scan tool display active: DRIVER SEAT BELT SWITCH SHORT TO GROUND?

Yes

- Go To 2

No

- Perform *RESTRAINTS SYSTEM INTERMITTENT TEST. Restraints System Intermittent Test

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




WARNING: To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.

Disconnect the Driver Seat Belt Switch connector.
Disconnect the ORC connectors.

NOTE: Check connectors - Clean and repair as necessary.

Connect the Load Tool 8443-25 ORC Adapter to the ORC connectors.
Measure the resistance of the (R57) Driver Seat Belt Switch Sense circuit between the Driver Seat Belt Switch connector cavity 1 and ground.
Measure the resistance of the (R59) Driver Seat Belt Switch Ground circuit between the Driver Seat Belt Switch connector cavity 2 and ground.
Is the resistance below 10k ohms on any of these circuits?

Yes

- Repair the (R57) or (R59) circuit for an open or high resistance.
- Perform *RESTRAINTS SYSTEM VERIFICATION TEST. Verification Tests

No

- Go To 3

3. CHECK OPERATION OF THE DRIVER SEAT BELT SWITCH
Replace the Driver Seat Belt Switch.
Reconnect the vehicle body harness to the switch.
Remove any special tools or jumper wires and reconnect all previously disconnected components - except the Battery.

WARNING: To avoid serious or fatal injury, turn the ignition ON, then reconnect the battery.

Connect the scan tool to the Data Link Connector - use the most current software available.
Use the scan tool and erase the stored codes in all airbag system modules.
Turn the Ignition Off, and wait 15 seconds before turning the Ignition On.
Wait one minute, and read active codes and if there are none present read the stored codes.
Did the active DRIVER SEAT BELT SWITCH CIRCUIT LOW DTC return?

Yes

WARNING: To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.

WARNING: If the airbag control module is dropped at any time, it must be replaced. Failure to take the proper precautions could result in accidental airbag deployment and serious or fatal injury.

- Replace the ORC.
- Perform *RESTRAINTS SYSTEM VERIFICATION TEST. Verification Tests

No

- Repair is complete.