B1B8D-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT LOW

Special Tools: Click to display a list of tools used in this procedure

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 Occupant Restraint Controller (ORC) is configured for a Driver Seat Track Position Sensor, the Occupant Restraint Controller (ORC) checks the sensor input current ranges.
Set Condition:
If the ORC 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.

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 GROUND
(R263) DRIVER SEAT POSITION SENSOR SUPPLY CIRCUIT SHORTED TO GROUND
(R261) DRIVER SEAT POSITION SENSOR SIGNAL CIRCUIT OPEN
(R263) DRIVER SEAT POSITION SENSOR SUPPLY CIRCUIT OPEN
DRIVER SEAT TRACK POSITION SENSOR
OCCUPANT RESTRAINT CONTROLLER (ORC)

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 DTC.

Does the scan tool display active DTC B1B8D-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT LOW DTC?

Yes

Go To 2

Go To 7

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) 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 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 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 (R261) DRIVER SEAT POSITION SENSOR SIGNAL CIRCUIT AND (R263) DRIVER SEAT POSITION SENSOR SUPPLY CIRCUIT FOR A SHORT TO GROUND

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.

2.	Connect the SRS Load Tool Adaptor 8443-32-L to the ORC connectors.

NOTE: The IP Harness is always connected to the right side (C1) of the SRS Load Tool Adaptor 8443-32-L .

3.	Measure the resistance between ground and the (R261) Driver Seat Position Sensor Signal circuit cavity 1.

4.	Measure the resistance between ground and the (R263) Driver Seat Position Sensor Supply 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 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 6

6. CHECK (R261) DRIVER SEAT POSITION SENSOR SIGNAL CIRCUIT AND (R263) DRIVER SEAT POSITION SENSOR SUPPLY CIRCUIT FOR AN OPEN

1.	Measure the resistance of the (R261) Driver Seat Position Sensor Signal circuit between the SRS Load Tool Adaptor 8443-32-L cavity C2-24 and the Driver Seat Track Position Sensor connector cavity 1.

2.	Measure the resistance of the (R263) Driver Seat Position Sensor Supply circuit between the SRS Load Tool Adaptor 8443-32-L cavity C2-23 and the Driver Seat Track Position Sensor 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 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 Occupant Restraint Controller (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).

7. 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.