B1B90

B1B90-DRIVER SEAT TRACK POSITION 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 seat track position sensors to verify the integrity of the sensor 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 track position sensor circuits continuously.

- Set Condition:
If the module detects that the sensor input is less than or equal to 0.3 mA. This DTC may set when the current is between 0.3 mA and 2.0 mA.






Diagnostic Test


1. DETERMINE ACTIVE OR STORED DTC
NOTE: Ensure the battery is fully charged.

Turn the ignition on.
With the scan tool, read ORC DTC's.
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. INSPECT DRIVER SEAT HARNESS WIRES AND CONNECTORS
WARNING: To avoid serious or fatal injury, turn the ignition off, disconnect the battery and wait two minutes before proceeding.

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 any of these conditions exist.

- Replace the Driver Seat Harness.
- Perform *ORC VERIFICATION TEST - VER 1. Verification Tests

No


- Go To 3


3. VERIFY THAT DRIVER SEAT HARNESS IS ROUTED CORRECTLY
Verify that the Driver Seat Harness is routed correctly.
Is the Driver Seat Harness routed correctly?

Yes


- Go To 4


No


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


4. (R261) DRIVER SEAT POSITION SENSOR DATA CIRCUIT SHORTED TO GROUND

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

Disconnect the Driver Seat Track Position Sensor connector.
Disconnect the ORC connector.

NOTE: Check connectors - Clean and repair as necessary.

Connect the 8443 ORC Adaptor to the ORC connectors.
Measure the resistance of the (R261) Driver Seat Position Sensor Data circuit between ground and the Driver Seat Track Position Sensor connector.
Is the resistance below 5K ohms?

Yes


- Repair or replace the (R261) Driver Seat Position Sensor Data circuit for a short to ground.
- Perform *RESTRAINTS SYSTEM VERIFICATION TEST.Restraints System Verification Test


No


- Go To 5


5. (R263) DRIVER SEAT POSITION SENSOR VOLTAGE CIRCUIT SHORTED TO GROUND
Measure the resistance between ground and the (R263) Driver Seat Position Sensor Voltage circuit.
Is the resistance below 5K 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 *RESTRAINTS SYSTEM VERIFICATION TEST.Restraints System Verification Test


No


- Go To 6


6. CHECK OPERATION OF THE DRIVER SEAT TRACK POSITION SENSOR

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

Replace the Driver Seat Track Position Sensor.
Reconnect the vehicle body harness to the sensor.

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 B1B90-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT SHORTED TOGETHER 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