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B1B94






B1B94-PASSENGER SEAT TRACK POSITION SENSOR CIRCUIT HIGH







Theory of Operation

When powered, the Occupant Restraint Controller (ORC) sends a test current to the seat track position sensors to verify the integrity of the sensor and wiring. The use of the SRS Load Tool Adapter in the tests below provides a test point in place of the module.

- When Monitored:
The ORC monitors the status of the seat track position sensor circuits continuously.

- Set Condition:
This DTC sets when the ORC detects a short to voltage on the seat track position sensor circuits for more than 2.5 seconds or if current is below threshold. This DTC transitions from active to stored when the module sees a recovery from the shorted to voltage condition for greater than five seconds.





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

1. DETERMINE ACTIVE OR STORED DTC

NOTE: Make sure the battery is fully charged.

1. Turn the ignition on.
2. Perform ORC module reset. Access the Miscellaneous Function menu from the ORC ECU Overview screen on the scan tool to perform this operation.
3. With the scan tool, read ORC DTCs.

Is the DTC active or stored?

ORC - ACTIVE DTC

- Go To 2

ORC - STORED DTC

- Perform the RESTRAINTS SYSTEM INTERMITTENT TEST. Restraints System Intermittent Condition Test.

2. CHECK FOR ADDITIONAL ACTIVE SENSOR DTCs
1. With the scan tool, read all active ORC DTCs.

Are DTCs B1B55-1st ROW PASSENGER SEAT BELT SENSOR CIRCUIT HIGH and B1B8E-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT HIGH active?

Yes

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

No

- Go To 3

3. INSPECT PASSENGER SEAT HARNESS WIRES AND CONNECTORS

WARNING: Turn the ignition off, disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

1. Using the wiring diagram/schematic as a guide, inspect the Passenger Seat Harness wiring and connectors. Look for chafed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.

Are any of these conditions present?

Yes

- NOTE: Do not attempt to repair the Seat Harness. Replace the Seat Harness if any of these conditions exist.

- Replace the Passenger Seat Harness.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.

No

- Go To 4

4. VERIFY THAT THE PASSENGER SEAT HARNESS IS ROUTED CORRECTLY
1. Verify that the Passenger Seat Harness is routed correctly.

Is the Passenger Seat Harness routed correctly?

Yes

- Go To 5

No

- Reroute the Passenger Seat Harness as necessary.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.

5. CHECK (R262) PASSENGER SEAT TRACK POSITION SENSOR SIGNAL CIRCUIT, (R264) PASSENGER SEAT TRACK POSITION SENSOR SUPPLY CIRCUIT, AND (R56) PASSENGER SEAT BELT SWITCH RETURN CIRCUIT FOR A SHORT TO VOLTAGE




1. Disconnect the Passenger Seat Track Position Sensor connector.
2. Disconnect the ORC connectors.

NOTE: Check the connectors - Clean and repair as necessary.

3. Connect the SRS Load Tool Adapter 8443-28 to the ORC connectors.

WARNING: Turn the ignition on, then reconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

4. Measure the voltage of the (R262) Passenger Seat Track Position Sensor Signal circuit between the SRS Load Tool Adapter 8443-28 and ground.
5. Measure the voltage of the (R264) Passenger Seat Track Position Sensor Supply circuit between the SRS Load Tool Adapter 8443-28 and ground.
6. Measure the voltage of the (R56) Passenger Seat Belt Switch Return circuit between the SRS Load Tool Adapter 8443-28 and ground.

Is there any voltage present on any circuit?

Yes

- WARNING: Turn the ignition off, disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
NOTE: If the short is found in the Seat Harness, do not attempt to repair the Seat Harness. Replace the Seat Harness.
- Repair or replace the circuit with voltage present for a short to voltage.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.

No

- Go To 6

6. CHECK (R262) PASSENGER SEAT TRACK POSITION SENSOR SIGNAL CIRCUIT FOR AN OPEN





WARNING: Turn the ignition off, disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

1. Measure the resistance of the (R262) Passenger Seat Track Position Sensor Signal circuit between the Passenger Seat Track Position Sensor connector and the SRS Load Tool Adapter 8443-28.

Is the resistance below 1.0 Ohm?

Yes

- Go To 7

No

- NOTE: If the open is found in the Seat Harness, do not attempt to repair the Seat Harness. Replace the Seat Harness.
- Repair or replace the (R262) Passenger Seat Track Position Sensor Signal circuit for an open.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.

7. CHECK (R264) PASSENGER SEAT TRACK POSITION SENSOR SUPPLY CIRCUIT FOR AN OPEN




1. Measure the resistance of the (R264) Passenger Seat Track Position Sensor Supply circuit between Passenger Seat Track Position Sensor connector and the SRS Load Tool Adapter 8443-28.

Is the resistance below 1.0 Ohm?

Yes

- Go To 8

No

- NOTE: If the open is found in the Seat Harness, do not attempt to repair the Seat Harness. Replace the Seat Harness.
- Repair or replace the (R264) Passenger Seat Track Position Sensor Supply circuit for an open.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.

8. CHECK (R261) DRIVER SEAT POSITION SENSOR DATA CIRCUIT FOR A SHORT TO VOLTAGE





WARNING: Turn the ignition on, then reconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

1. Measure the voltage of the (R261) Driver Seat Position Sensor Data circuit between the SRS Load Tool Adapter 8443-28 and ground.

Is there any voltage present on the circuit?

Yes

- WARNING: Turn the ignition off, disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
NOTE: If the short is found in the Seat Harness, do not attempt to repair the Seat Harness. Replace the Seat Harness.
- Repair or replace the (R261) Driver Seat Position Sensor Data circuit for a short to voltage.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.

No

- Go To 9

9. CHECK OPERATION OF THE PASSENGER SEAT TRACK POSITION SENSOR

WARNING: Turn the ignition off, disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

1. Replace the Passenger Seat Track Position Sensor.
2. Reconnect the vehicle body harness to the sensor.
3. Reconnect the ORC connectors.

WARNING: Turn the ignition on, then reconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

4. Use the scan tool and erase all codes in the ORC.
5. Perform ORC module reset. Access the Miscellaneous Function menu from the ORC ECU Overview screen on the scan tool to perform this operation.
6. Wait one minute, and read active codes.

Did the active B1B94-PASSENGER SEAT TRACK POSITION SENSOR CIRCUIT HIGH 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. Failure to follow these instructions may result in possible serious or fatal injury.

- WARNING: Turn the ignition off, disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.

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

No

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

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