Passenger Seat Belt Switch Circuits Short Together

PASSENGER SEAT BELT SWITCH CIRCUITS SHORT TOGETHER





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:
During initialization and every 60 ms thereafter, the ORC test the current on the Passenger Seat Belt Switch circuit.

- Set Condition:
This DTC sets when the ORC detects the seat belt switch circuits have 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 5 seconds.





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

Diagnostic Test

1. DETERMINE ACTIVE OR STORED DTC
Is the DTC active or stored?

ACTIVE DTC

- Go To 2

STORED DTC

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

2. CHECK THE (R58) PASSENGER SEAT BELT SWITCH LINE 1 SIGNAL CIRCUIT 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 Passenger Seat Belt Switch connector.
Disconnect the ORC connectors.

NOTE: Check connectors - Clean and repair as necessary.

Connect the Load Tool ORC 8443-25 Adaptor to the ORC connectors.
Measure the resistance of the (R58) Passenger Seat Belt Switch Sense circuit between the Passenger Seat Belt Switch connector cavity 1 and ground.
Is the resistance below 10K ohms?

Yes

- Repair the (R58) Passenger Seat Belt Switch Sense circuit for a short to ground.
- Perform *RESTRAINTS SYSTEM VERIFICATION TEST. Verification Tests.

No

- Go To 3

3. VERIFY PASSENGER SEAT BELT SWITCH CIRCUITS SHORTED TOGETHER
Measure the resistance between the (R58) Passenger Seat Belt Switch Sense circuit cavity 1 and the (R60) Passenger Seat Belt Switch Ground circuit cavity 2 at the Passenger Seat Belt Switch connector.
Is the resistance below 10K ohms?

Yes

- Repair the (R58) Passenger Seat Belt Switch Sense circuit for a short to the (R60) Passenger Seat Belt Switch Ground circuit.
- Perform *RESTRAINTS SYSTEM VERIFICATION TEST. Verification Tests.

No

- Go To 4

4. CHECK OPERATION OF THE 1st ROW PASSENGER SEAT BELT SWITCH
Replace the Passenger 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: PASSENGER SEAT BELT SWITCH CIRCUIT SHORTED TOGETHER DTC return?

Yes

WARNING: To avoid serious or fatal injury, turn the ignition ON, 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 Occupant Restraint Controller.
- Perform *RESTRAINTS SYSTEM VERIFICATION TEST. Verification Tests.

No

- Repair is complete.
- Perform *RESTRAINTS SYSTEM VERIFICATION TEST. Verification Tests.