B1B57

B1B57-1st ROW PASSENGER SEAT BELT SENSOR CIRCUIT SHORTED TOGETHER





For a complete wiring diagram REFER to DIAGRAMS/ELECTRICAL .

Theory of Operation


When powered, the Occupant Restraint Controller (ORC) sends a test current to the belt switches to verify the integrity of the switch and wiring. The use of the ORC connector adapter tool in the tests below provides a test point in place of the module.


- When Monitored:
The ORC monitors the status of the seat belt switch circuits at power up and every 60 ms thereafter while the ignition is in on.

- Set Condition:
This DTC sets when the ORC detects the (R58) seat belt switch sense circuit is shorted to ground or the seat belt switch 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
NOTE: Ensure the battery is fully charged.

Turn the ignition on.
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 *RESTRAINTS SYSTEM INTERMITTENT TEST.Restraints System Intermittent Test.


2. (R58) PASSENGER SEAT BELT SWITCH SENSE 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 connector.

NOTE: Check connectors - Clean and repair as necessary.

Connect the Load Tool ORC 8443-28 Adaptor to the ORC connectors.
Measure the resistance of the (R58) Passenger Seat Belt Switch Sense circuit between ground and the Passenger Seat Belt Switch connector.
Is the resistance below 5K ohms?

Yes


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


No


- Go To 3


3. (R58) PASSENGER SEAT BELT SWITCH LINE SENSE CIRCUIT FOR A SHORT TO (R60) PASSENGER SEAT BELT SWITCH GROUND CIRCUIT
Measure the resistance between the (R58) Passenger Seat Belt Switch Sense circuit and the (R60) Passenger Seat Belt Switch Ground circuit at the Passenger Seat Belt Switch connector.
Is the resistance below 5K ohms?

Yes


- Repair or replace 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.Restraints System Verification Test


No


- Go To 4


4. CHECK OPERATION OF THE 1st ROW PASSENGER SEAT BELT SWITCH
Replace the 1st Row Passenger Seat Belt Switch.
Reconnect the vehicle body harness to the switch.

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 all codes in the ORC.
Turn the Ignition Off, and wait 15 seconds before turning the Ignition On.
Wait one minute, and read active codes.
Did the active B1B57-1st ROW PASSENGER SEAT BELT SENSOR CIRCUIT SHORTED TOGETHER DTC return?

Yes


- Replace the ORC.
- Perform *RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.


No


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