B1C38 1ST Row Driver Retractor Pretensioner Circuit Low
October 15, 2019
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B1C38 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 low resistance on the driver seat belt retractor tensioner circuits.
Possible causes B1C38 code:
- Driver seat belt retractor tensioner line 1 circuit or driver seat belt retractor tensioner line 2 circuit shorted to ground
- Driver seat belt retractor tensioner
- Occupant Restraint Controller (ORC)
Is the DTC active or stored?
ACTIVE, go to step 2.
STORED, go to step 4.
Turnn 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 B1C38 code?
Yes, go to step 3.
No, replace the driver seat belt retractor tensioner, perform the Airbag system verification.
Disconnect the ORC connectors, connect the SRS load tool adaptor 8443-32-L to the ORC C2 connector. Measure the resistance of the driver seat belt retractor tensioner line 1 circuit between ground and the driver seat belt retractor tensioner connector.
Measure the resistance of the driver seat belt retractor tensioner line 1 circuit between ground and the driver seat belt retractor tensioner connector.
Is the resistance below 10K Ohms on either circuit?
Yes, repair the driver seat belt retractor tensioner circuits for a short to ground.
No, if the Occupant Restraint Controller (ORC) is dropped at any time, it must be replaced. Replace the ORC, perform the Airbag system verification.
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| Wiring B1C38 |
- Driver seat belt retractor tensioner line 1 circuit or driver seat belt retractor tensioner line 2 circuit shorted to ground
- Driver seat belt retractor tensioner
- Occupant Restraint Controller (ORC)
Diagnostic test B1C38 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?
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 retractor tensioner connector. Connect the SRS load tool kit 8443A and the SRS load tool jumper to the driver seat belt retractor tensioner connector.Turnn 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 B1C38 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 ground
Turn the ignition off disconnect the 12volt 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 C2 connector. Measure the resistance of the driver seat belt retractor tensioner line 1 circuit between ground and the driver seat belt retractor tensioner connector.
Measure the resistance of the driver seat belt retractor tensioner line 1 circuit between ground and the driver seat belt retractor tensioner connector.
Is the resistance below 10K Ohms on either circuit?
Yes, repair the driver seat belt retractor tensioner circuits for a short to ground.
No, if the Occupant Restraint Controller (ORC) is dropped at any time, it must be replaced. Replace the ORC, perform the Airbag system verification.
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