B1B8D-Driver Seat Track position sensor circuit low

B1B8D code - while the CAN Bus ignition status is in Ignition-RUN and the Occupant Restraint Controller (ORC) or Airbag Module is configured for a driver seat track position sensor, the Occupant Restraint Controller (ORC) check 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 B1B8D code:

• 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
• Driver seat position sensor signal circuit shorted to ground
• Driver seat position sensor supply circuit shorted to ground
• Driver seat position sensor signal circuit open
• Driver seat position sensor supply circuit open
• Driver seat track position sensor
• Occupant Restraint Controller (ORC) / Airbag Module

Diagnose code B1B8D-Driver seat track position sensor circuit low

Step 1. Identifying vehicle equipment

Note : Make sure the battery is fully charged.

Turn the ignition on, with the scan tool, read ORC active DTC.

Does the scan tool display active DTC B1B8D-Driver seat track position sensor circuit low ?

Yes, go to step 2.

No, go to step 7.

Step 2. Check for active internal faults, ignition faults, and battery faults in the Occupant Restraint Controller (ORC)

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

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

Yes, refer to Sitemap/Labels-DTC B Codes (SRS) and perform the appropriate diagnostic procedure.

No, go to step 3.

Step 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.

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.

No, go to step 4.

Step 4. 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 step 5.

No, reroute the Driver seat harness as necessary.

Step 5. Check Driver seat position sensor signal circuit and 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.

Disconnect the ORC connectors, measure the resistance between ground and the Driver seat position sensor signal circuit. Measure the resistance between ground and the Driver seat position sensor supply circuit.

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.

No , go to step 6.

Step 6. Check Driver seat position sensor signal circuit and Driver seat position sensor supply circuit for an open

Measure the resistance of the Driver seat position sensor signal circuit between the ORC harness connector and the Driver seat track position sensor connector.

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.

No, Warning : If the Occupant Restraint Controller (ORC) is dropped at any time, it must be replace. Failure to follow these instructions may result in possible serious or fatal injury.

Replace the Occupant Restrain Controller (ORC) / Airbag Module. Peform the Airbag system verification.

Step 7. Test for an intermittent condition
With the scan tool, record and erase all DTC from the ORC. 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.

Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Look for chafed, 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 : 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.

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.

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.

Are any active DTC present ?

Yes, refer to Sitemap/Labels-DTC B Codes and perform the appropriate diagnostic procedure.
No, no problem found at this time. Erase all codes before returning the customer.

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