B1C39 1St Row Driver Retractor Pretensioner Circuit High

B1C39 code - With the ignition on, the Occupant Restraint Controller (ORC) monitors the voltage on the driver seat belt retractor tensioner circuits. The ORC detects voltage on the driver seat belt retractor tensioner circuits.

Possible causes B1C39 code:
- Driver seat belt retractor tensioner line 1 circuit shorted to battery
- Driver seat belt retractor tensioner line 2 circuit shorted to battery
- Driver seat belt retractor tensioner
- Occupant Restraint Controller

Diagnostic test B1C39 code

Step 1. Determine active or stored DTC

Make sure the battery is fully charged. The scan tool, SRS load tool kit 8443A and DVOM are required to perform the following test.
With the scan tool read the active ORC DTC. Select active or stored DTC.

Is the DTC active or stored?

Active, go to step 2.
Stored, go to step 4.

Step 2. Check for shorted driver seat belt retractor tensioner

Turn the ignition off disconnect the 12 volt battery and wait two minutes before proceeding. Disconnect the driver seat belt tensioner connector. Connect the SRS load tool kit 8443A and the SRS load tool jumper to the driver seat belt retractor tensioner connector.

Turn the ignition on, then reconnect the 12 volt battery and wait two minutes before proceeding. With the scan tool, read the active ORC DTC.

Does the scan tool display B1C39 code?

Yes, go to step 3.
No, replace the driver seat belt retractor tensioner, perform the Airbag system verification.

Step 3. Check Driver seat belt retractor tensioner line 1 circuit and driver seat belt retractor tensioner line 2 circuit for a short to battery

Turn the ignition off disconnect the 12 volt battery and wait two minutes before proceeding. Disconnect the SRS load tool kit 8443A and jumper from the driver seat belt retractor tensioner connector. Disconnect the ORC connectors. Connect the SRS load tool adaptor 8443-32-L to the ORC connectors. The IP harness is always connected to the right side (C1) of the adaptor 8443-32-L.

Measure the voltage of the driver seat belt retractor tensioner line 1 circuit between the driver seat belt tensioner connector cavity C2-1 and ground.
Measure the voltage of the Driver seat belt retractor tensioner line 2 circuit between the driver seat belt tensioner connector cavity C2-2 and ground.

Is there any voltage present on either circuit?

Yes, repair the driver seat belt retractor tensioner circuits with voltage present for a short to battery.
No, turn the ignition off disconnect the 12 volt battery and wait two minutes before proceeding. If the Occupant Restraint Controller (ORC) is dropped at any time, it must be replaced. Replace the ORC, perform the Airbag system verification.

Step 4. Stored ORC DTC.

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