Driver Seat Belt Switch Circuit

DRIVER SEAT BELT SWITCH CIRCUIT

Driver Seat Belt Switch Circuit:

WHEN MONITORED
The Occupant Restraint Controller (ORC) monitors the Driver Seat Belt Switch Sense circuit anytime the ignition is on.

SET CONDITION
The DTC will set if the ORC detects a communication fault between the ORC and the Driver Seat Belt Switch.

POSSIBLE CAUSES
- Driver seat belt switch sense circuit shorted
- Driver seat belt switch sense circuit open
- Driver seat belt switch
- Occupant restraint controller

DIAGNOSTIC TEST

1. READ DTCs WITH THE DRB III(R)





NOTE:
- When reconnecting the Airbag System components, the ignition must be turned off and the battery must be disconnected.
- Ensure the battery is fully charged.

WARNING: TURN THE IGNITION OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BEFORE PROCEEDING.

Disconnect the Driver Seat Belt Switch harness connector.

NOTE: Check connectors - Clean/repair as necessary.

Connect a 100V jumper wire at the Driver Seat Belt Switch harness connector.

WARNING: TURN THE IGNITION ON, THEN RECONNECT THE BATTERY.

With the DRB III(R), read the DTCs.

Q: Does the DRB III(R) display a Driver Seat Belt Switch DTC?

YES: Go to 2
NO: Replace the Driver Seat Belt Switch. Perform AIRBAG VERIFICATION TEST. Airbag System Verification Test

2. MEASURE THE VOLTAGE OF THE DRIVER SEAT BELT SWITCH SENSE CIRCUIT





NOTE: When reconnecting the Airbag System components, the ignition must be turned off and the battery must be disconnected.

WARNING: TURN THE IGNITION OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BEFORE PROCEEDING.

Disconnect the ORC connector.

NOTE: Check connectors - Clean/repair as necessary.

WARNING: TURN THE IGNITION ON, THEN RECONNECT THE BATTERY.

Measure the voltage of the Driver Seat Belt Switch Sense circuit at the Driver Seat Belt Switch harness connector.

Q: Is voltage present?

YES: Repair the Driver Seat Belt Switch Sense circuit for a short to voltage. Perform AIRBAG VERIFICATION TEST. Airbag System Verification Test
NO: Go to 3

3. MEASURE THE RESISTANCE OF THE DRIVER SEAT BELT SWITCH SENSE CIRCUIT





NOTE: When reconnecting the Airbag System components, the ignition must be turned off and the battery must be disconnected.

Measure the resistance of the Driver Seat Belt Switch Sense circuit between the ORC and the Driver Seat Belt Switch harness connector.

Q: Is the resistance below 5.0 ohms?

YES: Go to 4
NO: Repair the Driver Seat Belt Switch Sense circuit for an open. Perform AIRBAG VERIFICATION TEST. Airbag System Verification Test

4. MEASURE THE RESISTANCE OF THE DRIVER SEAT BELT SWITCH GROUND CIRCUIT





NOTE: When reconnecting the Airbag System components, the ignition must be turned off and the battery must be disconnected.

Measure the resistance of the ground circuit at the Driver Seat Belt Switch harness connector.

Q: Is the resistance below 5.0 ohms?

YES: Replace the Occupant Restraint Controller.

WARNING: IF THE OCCUPANT RESTRAINT CONTROLLER IS DROPPED AT ANY TIME, IT MUST BE REPLACED.

Perform AIRBAG VERIFICATION TEST. Airbag System Verification Test
NO: Repair the Driver Seat Belt Switch ground circuit for an open. Perform AIRBAG VERIFICATION TEST. Airbag System Verification Test