B1C4D 1st Row Passenger Seat Belt Buckle Tensioner Circuit High

B1C4D code - When powered, the Occupant Restraint Controller (ORC) sends a test current to the squibs to verify the integrity of the squib and wiring. These circuits are maintained in a ''floating'' configuration at the module (connected to neither power nor ground) as protection againts inadvertent deployment.

The ORC sends out a 40 mA diagnostic current on each squib voltage supply circuit at power up and every 200ms thereafter while the ignition is in on. The module then monitors the return wire to determine the state of the circuit. This DTC sets when the ORC detects a short to voltage on the squib circuit for more than 2.6 seconds. This DTC transitions from active to stored when the module sees a recovery from a short to voltage for greater than 2.6 seconds.

Possible causes B1C4D code :
- Passenger seat belt tensioner line 2 circuit shorted to battery
- Passenger seat belt tensioner line 1 circuit shorted to battery
- Passenger seat belt buckle tensioner
- Occupant Restraint Controller (ORC)

Diagnostic test B1C4D code

Step 1. Determine active or stored DTC

Turn the ignition on.
With the scan tool, read all active ORC DTCs.

Is the DTC active or stored?

Active, go to step 2.
No, perform the Airbag intermittent kondisi.

Step 2. Check for shorted passenger seat belt buckle tensioner

Turn the ignition off, disconnect the 12 volt battery and wait two minutes before proceeding.
Disconnect the passenger seat belt buckle tensioner harness connector.
Do no place an intact unployed airbag face down on a hard surface, the airbag will propel into the air if accidentially deployed.

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

Does the scan tool display B1C4D code?

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

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

Turn the ignition off, disconnect the 12 volt battery and wait two minutes before proceeding.
Disconnect the ORC harness connectors.
Turn the ignition on, then reconnect the 12 volt battery and wait two minutes before proceeding.

Measure the voltage of the passenger seat belt tensioner line 1 circuit at the passenger seat belt buckle tensioner connector.
Measure the voltage of the passenger seat belt tensioner line 2 circuit at the passenger seat belt buckle tensioner connector.

Is there any voltage present on either circuit?

Yes, repair or replace the passenger seat belt buckle tensioner circuits with voltage present, and perform the Airbag system verification.
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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