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B0129-11






B0129-11-PASSENGER SEAT TRACK POSITION SENSOR - CIRCUIT SHORT TO GROUND

Special Tools:






For a complete wiring diagram, refer to the Wiring Information.

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 56 Way ACM Adapter (8443-25)in the tests below provides a test point in place of the module. The Seat Track Position Sensor will default to the full forward position for the short to ground fault.

- When Monitored:
While the CAN bus ignition status is in IGN_RUN and the module is configured for a Driver Seat Track Position Sensor, the module checks the sensor input current ranges.

- Set Condition:
If the module detects that the sensor input is greater than or equal to 20.5 mA for greater than 3 seconds the DTC will set. This DTC may set when the current is between 17 mA and 20.5 mA. This DTC transitions from active to stored when the module sees a recovery from the shorted to ground condition for greater then 5 seconds. The multifunction indicator lamp (MIL) will set in the instrument cluster.





1. IDENTIFYING VEHICLE EQUIPMENT

NOTE: Make sure the battery is fully charged.

1. Turn the ignition on.
2. With the scan tool, read ORC active DTCs.

Does the scan tool display active DTC: B0129-11-PASSENGER SEAT TRACK POSITION SENSOR - CIRCUIT SHORT TO GROUND?

Yes

- Go To 2

No

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

2. CHECK FOR ACTIVE INTERNAL FAULTS, IGNITION FAULTS, AND BATTERY FAULTS IN THE OCCUPANT RESTRAINT CONTROLLER (ORC)
1. With the scan tool, read Occupant restraint Controller (ORC) DTCs.

Does the scan tool display any active DTCs relating to internal faults, ignition faults, or battery faults?

Yes

- Testing and Inspection Perform the appropriate diagnostic procedure.

No

- Go To 3

3. INSPECT DRIVER 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 driver 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 the condition inspecting or testing for is present in the Seat Harness.

- Replace the driver seat harness.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.

No

- Go To 4

4. VERIFY THAT DRIVER SEAT HARNESS IS ROUTED CORRECTLY
1. Verify that the driver seat harness is routed correctly.

Is the Driver Seat Harness routed correctly?

Yes

- Go To 5

No

- Reroute the driver seat harness as necessary.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.

5. CHECK (R261) DRIVER SEAT POSITION SENSOR DATA CIRCUIT AND (R263) DRIVER SEAT POSITION SENSOR VOLTAGE CIRCUIT FOR A SHORT TO GROUND




1. Measure the resistance between ground and the (R261) Driver Seat Position Sensor Data circuit cavity 1.
2. Measure the resistance between ground and the (R263) Driver Seat Position Sensor Voltage circuit cavity 2.

Is the resistance below 10k Ohms on either circuit?

Yes

- NOTE: Do not attempt to repair the Seat Harness. Replace the Seat Harness if the condition inspecting or testing for is present in the Seat Harness.

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

No

- Go To 6

6. CHECK (R261) DRIVER SEAT POSITION SENSOR DATA CIRCUIT AND (R263) DRIVER SEAT POSITION SENSOR VOLTAGE CIRCUIT FOR AN OPEN
1. Disconnect the ORC harness connectors.

NOTE: Check connectors - Clean and repair as necessary.

NOTE: After disconnecting the ORC module and the ORC module body harness connector, check the ORC module body harness connector shorting bar pin location. The shorting bar pin location should be down and not visible through the larger center holes of the ORC module body harness connector.





2. Connect the SRS Load Tool 56 Way ACM Adapter (8443-25) to the ORC harness connector.
3. Measure the resistance of the (R261) Driver Seat Position Sensor Data circuit between the SRS Load Tool 56 Way ACM Adapter (8443-25)cavity 32-28 and the Driver Seat Track Position Sensor harness connector cavity 1.
4. Measure the resistance of the (R263) Driver Seat Position Sensor Voltage circuit between the SRS Load Tool 56 Way ACM Adapter (8443-25)cavity 32-20 and the Driver Seat Track Position Sensor harness connector cavity 2.

Is the resistance of either circuit above 5.0 Ohms?

Yes

- NOTE: Do not attempt to repair the Seat Harness. Replace the Seat Harness if the condition inspecting or testing for is present in the Seat Harness.

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

No

- 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.
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.

- Replace the Occupant Restraint Controller (ORC ). Occupant Restraint Controller - Removal.
- Perform the RESTRAINTS SYSTEM VERIFICATION TEST. Restraints System Verification Test.

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