B1C3A 1ST Row Driver Retractor Pretensioner Circuit Open

B1C3A code - With the ignition on, the Occupant Restraint Controller (ORC) monitors the resistance of the Driver seat belt retractor tensioner circuits. The ORC has detected an open or high resistance on the driver seat belt retractor tensioner circuits.

Possible causes B1C3A code
- Driver seat belt retractor tensioner line 1 circuit open
- Driver seat belt retractor tensioner line 2 circuit open
- Driver seat belt retractor tensioner
- Occupant Restraint Controller (ORC)

Diagnostic test B1C3A code

Step 1. Determine active or stored DTC

Make sure the battery is fully charged. With the scan tool read the active ORC DTC. Select active or stored DTC.

Is the DTC active or stored?

ORC ACTIVE DTC, go to step 2.
ORC STORED DTC, go to step 5.

Step 2. Check for driver seat belt retractor tensioner circuit open

Turn the ignition off disconnect the 12 volt battery and wait two minutes before proceeding. Disconnect the driver seat belt retractor tensioner connector. Check connectors - clean and repair as necessary.
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 B1C3A code?

Yes, go to step 3.
No, replace the driver seat belt retractor tensioner.

Step 3. Check driver seat belt retractor tensioner line 1 circuit for an open

Turn the ignition off disconnect the 12 volt battery and wait two minutes. Disconnect the ORC connectors. Measure the resistance of the driver seat belt retractor tensioner line 1 circuit between the driver seat belt retractor tensioner connector cavity 2 and SRS harness connector.

Is the resistance below 1.0 Ohms?

Yes, go to step 4.
No, repair the driver seat belt retractor tensioner line 1 circuit for an open.

Step 4. Check driver seat belt retractor tensioner line 2 circuit for an open

Measure the resistance of the driver seat belt retractor tensioner line 1 circuit between the driver seat belt retractor tensioner connector cavity 1 and SRS harness connector.

Is the resistance below 1.0 Ohms?

Yes, if the Occupant Restraint Controller (ORC) is dropped at any time, it must be replaced. Replace the ORC. Perform the Airbag system verification.
No, repair the driver seat belt retractor tensioner line 1 circuit for an open.

Step 5. Stored ORC DTC.

Share this post