B1B8E
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.
1. CHECK FOR ACTIVE INTERNAL FAULTS, IGNITION FAULTS, AND BATTERY FAULTS IN THE OCCUPANT CLASSIFICATION MODULE (OCM)
NOTE: Ensure the battery is fully charged.
1. Turn the ignition on.
2. With the scan tool, read Occupant Classification Module (OCM) DTCs.
Does the scan tool display any active DTCs relating to internal faults, ignition faults, or battery faults?
Yes
- Diagnose and repair the DTCs. Testing and Inspection.
No
- Go To 2
2. VERIFY THAT DTC B1B8E-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT HIGH IS ACTIVE
1. With the scan tool, read OCM DTCs.
Does the scan tool display active: B1B8E-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT HIGH?
Yes
- Go To 3
No
- Go To 8
3. INSPECT DRIVER SEAT HARNESS WIRES AND CONNECTORS
1. With the scan tool, erase OCM DTCs.
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.
2. 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 OCM VERIFICATION TEST. Occupant Classification Module (OCM) 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 OCM VERIFICATION TEST. Occupant Classification Module (OCM) System Verification Test.
5. CHECK FOR DTC B1B8E-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT HIGH 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. 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 OCM DTCs.
Does the scan tool display: B1B8E-DRIVER SEAT TRACK POSITION SENSOR CIRCUIT HIGH?
Yes
- Go To 6
No
- Replace the Driver Seat Track Position Sensor.
- Perform the OCM VERIFICATION TEST. Occupant Classification Module (OCM) System Verification Test.
6. CHECK (R261) SEAT POSITION SENSOR DATA-DRIVER CIRCUIT AND (R263) SEAT POSITION SENSOR VOLTAGE-DRIVER 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.
WARNING: Turn the ignition on, then reconnect the 12-volt battery. Wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
1. Measure the voltage of the (R261) Seat Position Sensor Data-Driver circuit.
2. Measure the voltage of the (R263) Seat Position Sensor Voltage-Driver circuit.
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 any of these conditions exist.
- Replace the Driver Seat Harness.
- Perform the OCM VERIFICATION TEST. Occupant Classification Module (OCM) System Verification Test.
No
- Go To 7
7. CHECK (R261) SEAT POSITION SENSOR DATA-DRIVER CIRCUIT FOR A SHORT TO (R263) SEAT POSITION SENSOR VOLTAGE-DRIVER 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) Seat Position Sensor Data-Driver circuit and the (R263) Seat Position Sensor Voltage-Driver circuit.
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.
- Perform the OCM VERIFICATION TEST. Occupant Classification Module (OCM) System Verification Test.
No
- Replace the OCM.
- Perform the OCM VERIFICATION TEST. Occupant Classification Module (OCM) System Verification Test.
8. TEST FOR AN INTERMITTENT CONDITION
1. With the scan tool, record and erase all DTC's from the OCM.
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. 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 DTCs present?
Yes
- Select the appropriate diagnostic procedure. Testing and Inspection.
No
- No problem found at this time. Erase all codes before returning vehicle to customer.