B1C4E 1st Row Passenger Seat belt Buckle Tensioner Circuit Open

B1C4E 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 against 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 an open on the squib circuit for more than 2.6 seconds. This DTC transitions from active to stored when the module sees a recovery from an open condition for greater than 2.6 seconds.

Possible causes B1C4E code:
- Passenger seat belt tensioner line 2 circuit open
- Passenger seat belt tensioner line 1 circuit open
- Passenger seat belt buckle tensioner
- Occupant Restraint Controller (ORC)

Diagnostic test B1C4E 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 DTCa.

Is the DTC active or stored?

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

Step 2. Check for open 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 not place in intact undeployed airbag down on a hard surface, the airbag will propel into the air if accidentially.

Turn the ignition on, then 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 B1C4E code?

Yes, go to step 3.
No, replace the passenger seat belt buckle tensioner. Perform the Airbag system verification.

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

Turn the ignition off, disconnect the 12 volt battery and wait two minutes before proceeding.
Disconnect the ORC harness connectors. Measure the resistance of the passenger seat belt tensioner line 1 circuit between the passenger seat belt buckle tensioner harness connector and ORC harness connector.

Is the resistance below 1.0 Ohms?

Yes, go to step 4.
No, repair or replace the passenger seat belt tensioner line 1 circuit.

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

Measure the resistance of the passenger seat belt tensioner line 2 circuit between the passenger seat belt buckle tensioner harness connector and the ORC 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. Failure to take the proper precautions can result in accidental airbag deployment. Replace the ORC, perform the Airbag system verification.

No, repair or replace the passenger seat belt tensioner line 2 circuit for an open.

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