B1B8F-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT OPEN

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

Possible Causes

When Monitored:
While the CAN bus ignition status is in IGN_RUN and the module is configured for a Seat Track Position Sensor, the Occupant Restraint Controller (ORC) checks the sensor input current ranges.
Set Condition:
This DTC may set when the ORC detects that the sensor input current is below 1 mA.

Possible Causes
DRIVER SEAT HARNESS IMPROPERLY ROUTED
DRIVER SEAT HARNESS WIRES CHAFED, PIERCED, PINCHED, PARTIALLY BROKEN
DRIVER SEAT HARNESS CONNECTOR TERMINALS BROKEN, BENT, PUSHED OUT, SPREAD, CORRODED, CONTAMINATED
(R261) DRIVER SEAT POSITION SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE
(R263) DRIVER SEAT POSITION SENSOR SUPPLY CIRCUIT SHORTED TO VOLTAGE
(R261) DRIVER SEAT POSITION SENSOR SIGNAL CIRCUIT SHORTED TO THE (R263) DRIVER SEAT POSITION SENSOR SUPPLY CIRCUIT
DRIVER SEAT TRACK POSITION SENSOR
OCCUPANT RESTRAINT CONTROLLER (ORC)

1. 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) DTC.

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

Yes

(Refer to 28 - DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Diagnosis and Testing) and perform the appropriate diagnostic procedure.

Go To 2

2. VERIFY THAT DTC B1B8F-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT OPEN IS ACTIVE

Does the scan tool display active B1B8F-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT OPEN DTC?

Yes

Go To 3

Go To 8

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 any of these conditions exist
Replace the Driver Seat Harness in accordance with the Service Information.
Perform the AIRBAG SYSTEM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure).

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

Reroute the Driver Seat Harness as necessary.
Perform the AIRBAG SYSTEM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure).

5. CHECK FOR DTC B1B8F-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT OPEN WITH DRIVER SEAT TRACK POSITION SENSOR DISCONNECTED

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.	Disconnect the Driver Seat Track Position Sensor connector.

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.

2.	Wait two minutes, and then with the scan tool, read ORC DTC.

Does the scan tool display B1B8F-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT OPEN DTC?

Yes

Go To 6

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 Driver Seat Track Position Sensor in accordance with the service information.
Perform the AIRBAG SYSTEM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure).

6. CHECK (R261) DRIVER SEAT POSITION SENSOR SIGNAL CIRCUIT AND (R263) DRIVER SEAT POSITION SENSOR SUPPLY CIRCUIT FOR A SHORT TO VOLTAGE

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.	Disconnect 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.

2.	Measure the voltage of the (R261) Driver Seat Position Sensor Signal circuit between the Driver Seat Track Position Sensor connector and ground.

3.	Measure the voltage of the (R263) Driver Seat Position Sensor Supply circuit between the Driver Seat Track Position Sensor connector and ground.

Is the voltage above 0.2 of a volt on either circuit?

Yes

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

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 Driver Seat Harness in accordance with the Service Information.
Perform the AIRBAG SYSTEM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure).

Go To 7

7. CHECK (R261) DRIVER SEAT POSITION SENSOR SIGNAL CIRCUIT FOR A SHORT TO (R263) DRIVER SEAT POSITION SENSOR SUPPLY CIRCUIT

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 between the (R261) Driver Seat Position Sensor Signal circuit and the (R263) Driver Seat Position Sensor Supply circuit in the Driver Seat Track Position Sensor connector.

Is the resistance below 10k Ohms?

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 in accordance with the service information.
Perform the AIRBAG SYSTEM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure).

WARNING:
If the Occupant Restraint Controller (ORC) is dropped at any time, it must be replaced. Failure to follow these instructions may result in possible serious or fatal injury.
Replace the ORC in accordance with the Service information.
Perform the AIRBAG SYSTEM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Standard Procedure).

8. TEST FOR AN INTERMITTENT CONDITION

1.	With the scan tool, record and erase all DTC from the ORC.

2.	If any ACTIVE codes are present they must be resolved before diagnosing any stored codes.

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.

3.	Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.

4.	Look for chafed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.

5.	The following additional checks may assist you in identifying a possible intermittent problem.

6.	Reconnect any disconnected components and harness connector.

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.

7.	With the scan tool monitor active codes as you work through the following steps.

WARNING:

Maintain a safe distance from all airbags while performing the following steps. Failure to follow these instructions may result in possible serious or fatal injury.

8.	Wiggle the wiring harness and connectors of the related airbag circuit or component.

9.	If only stored codes return continue the test until the problem area has been isolated.

10.	In the previous steps you have attempted to recreate the conditions responsible for setting active DTC in question.

Are any ACTIVE DTC present?

Yes

(Refer to 28 - DTC-Based Diagnostics/CONTROLLER, Occupant Restraint (ORC) - Diagnosis and Testing) and perform the appropriate diagnostic procedure.

No problem found at this time. Erase all codes before returning vehicle to customer.