B1C4C 1st Row Passenger Seat Belt Buckle Tensioner Circuit Low

B1C4C code - When powered, the Occupant Restraint Controller (ORC) sends a test current to the squibs to the 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. Use of the SRS load tool adapter tool provides a test point as well as a method for opening the shorting bar connections within the harness connector.

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 determine the state of the circuit.

The DTC sets when the ORC detects a short to ground 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 ground for greater than 2.6 seconds.

Possible causes B2C4C code :
- Passenger seat belt tensioner line 2 circuit shorted to ground
- Passenger seat belt tenisoner line 1 circuit shorted to ground
- Passenger seat belt buckle tensioner
- Occupant Restraint Controller (ORC)

Diagnostic test B1C4C code

Step 1. Determine active or stored DTC

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

Is the DTC ACTIVE or STORED?

ACTIVE, go to step 2.
STORED, perform the Airbag intermittent kondisi.

Step 2. Check for shorted passenger seat belt buckle tensioner circuit

Turn the ignition off, disconnect the 12volt battery and wait two minutes before proceeding.
Disconnect the passenger seat belt buckle tensioner harness connector.
Do not place an intact undeployed airbag face down on a hard surface, the airbag will propel into the air in accidentially deployed.

Check the connectors - clean and repair as neccesary.
Turn the ignition on, then reconnect the 12volt battery and wait two minutes before proceeding.
With the scan tool, read the active ORC DTCs.

Does the scan tool display B1C4C code?

Yes, go to step 3.
No, turn the ignition off, disconnect the 12volt battery and wait two minutes before proceeding. Replcae the passenger seat belt buckle tensioner. 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 ground

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

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

Is the resistance below 6K Ohms on either circuit?

Yes, repair or replace the passenger seat belt buckle tensioner circuits with a resistance below 6K Ohms.
No, if the Occupant Restraint Controller (ORC) is dropped at any be replaced. Replace the ORC, perform the Airbag system verification.

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