B1C29 Left Side Seat Thorax Squib 1 Open

B1C29 code - The Occupant Restraint Controller (ORC) monitors the resistance of the left seat squib circuits. The ORC will set this DTC if it detects an open or high resistance on the left seat squib circuits.

B1C29
Wiring diagram B1C29 code
Possible cause B1C29 code:
- Left seat squib line 1 circuit open
- Left seat squib line 2 circuit open
- Left seat squib Airbag
- Occupant Restraint Controller (ORC)

Diagnostic test B1C29 code

Step 1. Determine active or stored DTC

Turn the ignition on, with the scan tool read the active ORC DTC.

Select ACTIVE or STORED:

ACTIVE, go to step 2.
STORED, go to step 5.

Step 2. Check for open squib circuits in left seat squib Airbag

Turn the ignition off disconnect the 12 volt battery and wait two minutes before proceeding. Disconnect the left seat squib airbag connector. Do not place an intact non-deployed seat squib airbag facw down on a hard surface, the airbag will propel into the air if accidentially deployed.

Connect the SRS load tool kit 8443A and SRS load tool jumper to the left seat squib airbag connector.

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

Does the scan tool display B1C29 code?

Yes, go to step 3.
No, turn the ignition off disconnect the 12 volt battery and wait two minutes before proceeding. Replace the left seat squib airbag, perform the Airbag system verification.

Step 3. Check left seat squib line 1 circuit for an open

Turn the ignition off disconnect the 12 volt battery and wait two minutes before proceeding. Disconnect the SRS load tool Kit 8443A and SRS load tool jumper from the left seat squib airbag connector. Disconnect the ORC connector. Check connectors, clean and repair as necessary.

Connect the SRS load tool adaptor 8443-32-L to the ORC connectors. Measure the resistance of the left seat squib line 1 circuit between the left seat squib airbag connector and the SRS load tool adaptor 8443-32-L cavity C2-6.

Is the resistance below 1.0 Ohm?

Yes, go to step 4.
No, repair the left seat squib line 1 circuit for an open or high resistance.

Step 4. Check left seat squib line 2 circuit for an open

Measure the resistance of the left seat squib line 2 circuit between the left side seat squib airbag connector and the SRS load tool adaptor 8443-32-L cavity C2-5.

Is the resistance below 1.0 Ohm?

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.

Step 5. Checking stored or intermittent codes

Diagnose and repair all active codes before diagnosing stored codes.
With the scan tool, record and erase all Airbag system module DTC. Turn the ignition off disconnect the 12 volt battery and wait two minutes before proceeding.

Using the wiring diagram/schematic as a guide, inspect the related wiring and conenctors for chafed, pierced, pinched, and partially broken wires, and for broken, bent, pushed out, corroded, and contaminated terminals. Repair as necessary.

Reconnect all disconnected  components and harness connectors. Turn the ignition on, then reconnect the 12 volt battery and wait rwo minutes before proceeding.
With the scan tool, monitor for active codes while performing the following:
- Wiggle the wiring harness and connectors of the related airbag circuit.
- Continue the test until either a code becomes active or the problem area is isolated.

In the previous steps you have attempted to recreate the conditions responsible for setting the DTC in question/causing the intermittent condition.

Are any ACTIVE DTC present?

Yes, refer to SITEMAP/LABELS - DTC B CODES (SRS) and perform the aproppriate diagnostic procedure.
No, no problem found at this time. Erase all codes before returning the vehicle to the customer.

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