B1B55

B1B55-1st ROW PASSENGER SEAT BELT SENSOR CIRCUIT HIGH





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 seat belt switch circuits have become shorted to voltage for more than 2.5 seconds. This DTC transitions from active to stored when the module sees a recovery from the shorted to voltage 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. CHECK FOR ADDITIONAL ACTIVE SENSOR DTCS
Turn the ignition on.
With the scan tool, read all active ORC DTCs.
Are DTCs B1B8E-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT HIGH and B1B94-PASSENGER SEAT TRACK POSITION SENSOR CIRCUIT HIGH active?

Yes


- Repair the (Z908) Ground circuit for an open.
- Perform *RESTRAINTS SYSTEM VERIFICATION TEST.Restraints System Verification Test


No


- Go To 3


3. (R58) PASSENGER SEAT BELT SWITCH SENSE CIRCUIT SHORTED TO VOLTAGE

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.

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

Measure the voltage of the (R58) Passenger Seat Belt Switch Sense circuit between the Load Tool ORC 8443-28 Adaptor and ground.
Is there any voltage present on the circuit?

Yes

WARNING: To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.
Repair the (R58) Passenger Seat Belt Switch Sense circuit for a short to battery.
- Perform *RESTRAINTS SYSTEM VERIFICATION TEST.Restraints System Verification Test


No


- Go To 4


4. (R60) PASSENGER SEAT BELT SWITCH GROUND CIRCUIT SHORTED TO VOLTAGE
Measure the voltage of the (R60) Passenger Seat Belt Switch Ground circuit between the Load Tool ORC 8443-28 Adaptor and ground.
Is there any voltage present on the circuit?

Yes

WARNING: To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.
Repair or replace the (R60) Passenger Seat Belt Switch Ground circuit for a short to battery.
- Perform *RESTRAINTS SYSTEM VERIFICATION TEST.Restraints System Verification Test


No


- Go To 5


5. (R58) PASSENGER SEAT BELT SWITCH SENSE CIRCUIT FOR AN OPEN
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 the Passenger Seat Belt Switch connector and the 8443 ORC Adaptor.
Is the resistance below 1.0 ohm?

Yes


- Go to 6


No


- Repair or replace the (R58) Passenger Seat Belt Switch Sense circuit. Then, Go to 6


6. (R60) PASSENGER SEAT BELT SWITCH GROUND CIRCUIT FOR AN OPEN
Measure the resistance of the (R60) Passenger Seat Belt Switch Ground circuit between the Passenger Seat Belt Switch connector and the Load Tool ORC 8443-28 Adaptor.
Is the resistance below 1.0 ohm?

Yes


- Go to 7


No


- Repair or replace the (R60) Passenger Seat Belt Switch Ground.
- Perform *RESTRAINTS SYSTEM VERIFICATION TEST.Restraints System Verification Test


7. CHECK OPERATION OF THE 1st ROW PASSENGER SEAT BELT SWITCH
WARNING: To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.

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 B1B56-1st ROW PASSENGER SEAT BELT SENSOR CIRCUIT OPEN DTC return?

Yes

WARNING: If the Occupant Restraint Controller (ORC) is dropped at any time, it must be replaced. Failure to take the proper precautions can result in accidental airbag deployment and serious or fatal injury.


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

- 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