B1C4F 1st Row Passanger Seat Belt Buckle Tensioner Circuit Shorted Together

B1C4F code - The ORC sends out a 40 mA diagnostic current on each squib voltage supply circuit at power up and every 200 ms thereafter while the ignition is in on. The module then monitors the return wire to deternine the state of the circuit. This DTC sets when the ORC detects both circuits of the same squib are shorted together for more than 2.6 seconds. This DTC transitions from active to shorted when the module sees a recovery from the shorted together condition for greater than 2.6 seconds.

Possible causes B1C4F code:
- Passenger seat belt tensioner line 2 circuit shorted to the passenger seat belt tensioner line 1 circuit
- Passenger seat belt buckle tensioner
- Occupant Restraint Controller (ORC)

Diagnostic test B1C4F code

Step 1. Determine active or stored DTC

Make sure the battery is fully charged
Turn the ignition on, with the scan tool read all active ORC DTCs.

Is the DTC active or stored?

Active, go to step 2.
Stored, perform the Airbag intermittent kondisi.

Step 2. Check for shorted passanger seat belt buckle tensioner

Turn the ignition off, disconnect the 12 volt battery and wait two minutes before proceeding.
Disconnect the passanger seat belt buckle tensioner harness connector. Check the connectors, cleand and repair as necessary.

Turn the ignition onm 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, read the active ORC DTCs.

Does the scan tool display B1C4F code?

Yes, go to step 3.
No, turn the ignition off, disconnect the 12 volt battery and wait two minutes before proceeding. Replace the passanger seat belt buckle tensioner. Perform the Airbag system verification.

Step 3. Check passenger seat belt tensioner line 1 circuit for a short to passenger seat belt tensioner line 2 circuit

Turn the ignition off, disconnect the 12volt battery and wait two minutes before proceeding.
Disconnect the ORC harness connectors. Check the connectors, celan and repair as necessary.

Measure the resistance between the passenger seat belt tensioner line 1 circuit and the passenger seat belt tensioner line 2 circuit at the passenger seat belt buckle tensioner harness connector.

Is the resistance below 15K Ohms?

Yes, repair the short between the passenger seat belt tensioner line 1 circuit and the passenger seat belt tensioner line 2 circuit.
No, if the Occupant Restraint Controller (ORC) is dropped at any time, it must be replaced. Failure to take the proper precautions can result in accidential airbag deployment. Replace the ORC, perform the Airbag system verification.

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