B1C3B 1ST Row Driver Retractor Pretensioner Circuit Shorted Together

B1C3B code - The Occupant Restraint Controller (ORC) monitors the resistance of the driver seat belt retractor tensioner circuits. The ORC has detected low resistance between the driver seat belt retractor tensioner circuits.

B1C3B code
Possibel causes B1C3B code:
- Circuit driver seat belt retractor tensioner line 1 shorted to the driver seat belt retractor tensioner line 2 circuit
- Driver seat belt retractor pretensioner
- Occupant Restraint Controller (ORC)

Diagnostic test B1C3B code

Step 1. Select 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 4.

Step 2. Check for shorted driver seat belt retractor tensioner

Turn the ignition off disconnect the 12volt battery. Disconnect the driver seat belt retractor tensioner connector. Check connector - clean and reapir as necessary.
With the scan tool, read the active ORC DTC.

Does the scan tool display B1C3B?

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 a short to driver seat belt retractor tensioner line 2 circuit

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

Is the resistance below 10k Ohms?

Yes, repair the driver seat belt retractor tensioner line 1 circuit for a short to the driver seat belt retractor tensioner line 2 circuit.

No, if the ORC is dropped at any time, it must be replaced. Replace the ORC and perform the Airbag system verification.

Step 4. Stored ORC DTC

With the scan tool record and erase all DTC from all airbag system modules.
If any active codes are present they must be resolved before diagnosing any stored codes.
Using the wiring diagram as a guide, inspect the wiring and connector.
With the scan tool monitor active codes as you work through the following steps.
If codes are related to the Driver Airbag circuits, rotate the steering wheel from stop to stop.
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, Occupant Restraint (ORC) and perform the appropriate diagnostic procedure.
No, no problem found at this time. Erase all codes before returning vehicle to customer.

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