B1B8E

B1B8E-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT HIGH

B1B8E - Driver Seat Track Position Sensor Circuit High:

WHEN MONITORED

While the CAN bus ignition status is in IGN_RUN and the module is configured for a 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. This DTC may set when the current is between 17 mA and 20.5 mA.

POSSIBLE CAUSES

- Driver seat harness improperly routed
- Driver seat harness wires chaffed, pierced, pinched, partially broken
- Driver seat harness connector terminals broken, bent, pushed out, spread, corroded, contaminated
- (R261) Seat position sensor data-driver circuit shorted to voltage
- (R263) Seat position sensor voltage-driver circuit shorted to voltage
- (R261) Seat position sensor data-driver circuit shorted to (R263) seat position sensor voltage-driver circuit
- Driver seat track position sensor
- Occupant classification module (OCM)
- Occupant Restraint Controller (ORC)

DIAGNOSTIC TEST

1. IDENTIFYING VEHICLE EQUIPMENT

NOTE: Ensure the battery is fully charged.

Turn the ignition on.
With the scan tool, read ORC and if equipped OCM active DTCs.

Q: Select the module reporting the Seat Track Position Sensor DTC (s)

ORC - Go To 9
OCM - Go To 3


2. CHECK FOR ACTIVE INTERNAL FAULTS, IGNITION FAULTS, & BATTERY FAULTS IN THE OCCUPANT CLASSIFICATION MODULE (OCM)

With the scan tool, read Occupant Classification Module (OCM) DTCs.

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

YES: Diagnose and repair the DTCs.
NO: Go To 3

3. VERIFY THAT DTC B1B8E-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT HIGH IS ACTIVE

With the scan tool, read OCM DTCs.

Q: Does the scan tool display active: B1B8E-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT HIGH?

YES: Go To 4
NO: Go To 16

4. INSPECT DRIVER SEAT HARNESS WIRES & CONNECTORS

With the scan tool, erase OCM DTCs.

WARNING: TO AVOID PERSONAL INJURY OR DEATH, 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 chaffed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.

Q: 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 OCS VERIFICATION TEST - VER 1. OCS Verification Test

NO: Go To 5

5. VERIFY THAT DRIVER SEAT HARNESS IS ROUTED CORRECTLY

Verify that the Driver Seat Harness is routed correctly.

Q: Is the Driver Seat Harness routed correctly?

YES: Go To 6
NO: Reroute the Driver Seat Harness as necessary.
Perform OCS VERIFICATION TEST - VER 1. OCS Verification Test

6. CHECK FOR DTC B1B8E-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT HIGH WITH DRIVER SEAT TRACK POSITION SENSOR DISCONNECTED

WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNITION OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BEFORE PROCEEDING.

Disconnect the Driver Seat Track Position Sensor connector.

WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNITION ON, THEN RECONNECT THE BATTERY.

Wait two minutes, and then with the scan tool, read OCM DTCs.

Q: Does the scan tool display: B1B8E-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT HIGH?

YES: Go To 7
NO: Replace the Driver Seat Track Position Sensor.
Perform the OCS VERIFICATION TEST-VER 1. OCS Verification Test

7. CHECK (R261) SEAT POSITION SENSOR DATA-DRIVER CIRCUIT & (R263) SEAT POSITION SENSOR VOLTAGE-DRIVER CIRCUIT FOR A SHORT TO VOLTAGE






WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNITION OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BEFORE PROCEEDING.

Disconnect the OCM C1 connector.

WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNITION ON, THEN RECONNECT THE BATTERY.

Measure the voltage of the (R261) Seat Position Sensor Data-Driver circuit.
Measure the voltage of the (R263) Seat Position Sensor Voltage-Driver circuit.

Q: Is the voltage above 0.2 volts 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 OCS VERIFICATION TEST-VER 1. OCS Verification Test

NO: Go To 8

8. CHECK (R261) SEAT POSITION SENSOR DATA-DRIVER CIRCUIT FOR A SHORT TO (R263) SEAT POSITION SENSOR VOLTAGE-DRIVER CIRCUIT






WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNITION OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BEFORE PROCEEDING.

Measure the resistance between the (R261) Seat Position Sensor Data-Driver circuit and the (R263) Seat Position Sensor Voltage-Driver circuit.

Q: Is the resistance below 10k 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 OCS VERIFICATION TEST-VER 1. OCS Verification Test

NO: Replace the OCM.
Perform the OCS VERIFICATION TEST-VER 1. OCS Verification Test

9. CHECK FOR ACTIVE INTERNAL FAULTS, IGNITION FAULTS, & BATTERY FAULTS IN THE OCCUPANT RESTRAINT CONTROLLER (ORC)

With the scan tool, read Occupant Restraint Controller (ORC) DTCs.

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

YES: Diagnose and repair the DTCs.
NO: Go To 10

10. VERIFY THAT DTC B1B8D-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT HIGH IS ACTIVE

Q: Does the scan tool display active: B1B8E-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT HIGH?

YES: Go To 11
NO: Go To 16

11. INSPECT DRIVER SEAT HARNESS WIRES AND CONNECTORS

WARNING: TO AVOID PERSONAL INJURY OR DEATH, 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 chaffed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.

Q: 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 ORC VERIFICATION TEST - VER 1. Occupant Restraint Controller (ORC) Verification Test

NO: Go To 12

12. VERIFY THAT DRIVER SEAT HARNESS IS ROUTED CORRECTLY

Verify that the Driver Seat Harness is routed correctly.

Q: Is the Driver Seat Harness routed correctly?

YES: Go To 13
NO: Reroute the Driver Seat Harness as necessary.
Perform ORC VERIFICATION TEST - VER 1. Occupant Restraint Controller (ORC) Verification Test

13. CHECK FOR DTC B1B8E-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT HIGH WITH DRIVER SEAT TRACK POSITION SENSOR DISCONNECTED

WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNITION OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BEFORE PROCEEDING.

Disconnect the Driver Seat Track Position Sensor connector.

WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNITION ON, THEN RECONNECT THE BATTERY.

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

Q: Does the scan tool display: B1B8E-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT HIGH?

YES: Go To 14

NO:

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

Replace the Driver Seat Track Position Sensor.
Perform ORC VERIFICATION TEST - VER 1. Occupant Restraint Controller (ORC) Verification Test

14. CHECK (R261) SEAT POSITION SENSOR DATA-DRIVER CIRCUIT & (R263) SEAT POSITION SENSOR VOLTAGE-DRIVER CIRCUIT FOR A SHORT TO VOLTAGE






WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNITION OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BEFORE PROCEEDING.

Disconnect the ORC C1 connector.

WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNITION ON, THEN RECONNECT THE BATTERY.

Measure the voltage of the (R261) Seat Position Sensor Data-Driver circuit at the Driver Seat Track Position Sensor connector.
Measure the voltage of the (R263) Seat Position Sensor Voltage-Driver circuit at the Driver Seat Track Position Sensor connector.

Q: Is the voltage above 0.2 volts 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 ORC VERIFICATION TEST - VER 1. Occupant Restraint Controller (ORC) Verification Test
NO: Go To 15

15. CHECK (R261) SEAT POSITION SENSOR DATA-DRIVER CIRCUIT FOR A SHORT TO (R263) SEAT POSITION SENSOR VOLTAGE-DRIVER CIRCUIT





WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNITION OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BEFORE PROCEEDING.

Measure the resistance between the (R261) Seat Position Sensor Data-Driver circuit and the (R263) Seat Position Sensor Voltage-Driver circuit in the Driver Seat Track Position Sensor connector.

Q: Is the resistance below 10k 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 ORC VERIFICATION TEST - VER 1. Occupant Restraint Controller (ORC) Verification Test

NO:

Replace the Occupant Restraint Controller (ORC)
Perform ORC VERIFICATION TEST - VER 1. Occupant Restraint Controller (ORC) Verification Test

16. TEST FOR AN INTERMITTENT CONDITION

With the scan tool, record and erase all DTC's from the OCM.
If any ACTIVE codes are present they must be resolved before diagnosing any stored codes.

WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNITION OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BEFORE PROCEEDING.

Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Look for chaffed, pierced, pinched, or partially broken wires and broken, bent, pushed out, spread, corroded, or contaminated terminals.
The following additional checks may assist you in identifying a possible intermittent problem.
Reconnect any disconnected components and harness connector.

WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNITION ON, THEN RECONNECT THE BATTERY.

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

WARNING: TO AVOID PERSONAL INJURY OR DEATH, MAINTAIN A SAFE DISTANCE FROM ALL AIRBAGS WHILE PERFORMING THE FOLLOWING STEPS.

Wiggle the wiring harness and connectors of the related airbag circuit or component.
If only stored codes return continue the test until the problem area has been isolated.
In the previous steps you have attempted to recreate the conditions responsible for setting active DTC in question.

Q: Are any ACTIVE DTCs present?

YES: Select the appropriate symptom from Symptom List.
NO: No problem found at this time. Erase all codes before returning vehicle to customer.