B1C1C

B1C1C-PASSENGER ACTIVE HEADREST CONTROL CIRCUIT MISMATCH

For a complete wiring diagram, refer to the Wiring Information

Theory of Operation

The Passenger Active Headrest signal circuit is driven by a solenoid that also uses a diode in parallel. The single electrical component of the AHR (Active Headrest) unit is the latch-release solenoid. The solenoid is connected by a two way pigtail wire and harness connector. The pigtail wire and 2 way connector are routed through the center of one of the headrest support posts and down through the guide sleeve to the interior of the seat back, where it connects to the seat wire harness. The solenoid is grounded at an independent dedicated ground. The AHR components itself cannot be repaired. If damaged or ineffective, the AHR (Active Headrest) must be replaced as a new assembly. If upon inspection the AHR has deployed it can be reset following the proper reset method. Occupant Restraint Controller - Removal. Also if the already deployed Driver or Passenger AHR are latched in the locked position please see the scan tool miscellaneous functions to set the latch in the unlock or deployed position. Please be very observant and careful, the scan tool should never be used to actually deploy a known good non-deployed Driver or Passenger AHR.

- When Monitored:
The Occupant Restraint Controller (ORC) continuously monitors the Driver and Passenger Head Restraint Solenoid circuits for head restraint messages. The Driver and Passenger Head Restraint communication and on board diagnostics are powered by the ORC signal.

- Set Condition:
The Totally Integrated Power Module (TIPM) sends a configuration message to the ORC containing the Driver and Passenger configuration status. This DTC will set if the ORC is not configured for Driver and Passenger Head Restraint and receives the Driver and Passenger Restraint communication messages on the Head Restraint Solenoid circuits.





1. VERIFY ACTIVE DTC

NOTE: Make sure the battery is fully charged.

1. Turn the ignition on.
2. With the scan tool, read the ORC DTCs.

Does the scan tool display active B1C1C-PASSENGER ACTIVE HEADREST CONTROL CIRCUIT MISMATCH DTC?

Yes

- Go To 2

No

- Test Complete, the condition or conditions that originally set this DTC are not present at this time.
- Perform the RESTRAINTS SYSTEM INTERMITTENT TEST. Restraints System Intermittent Condition Test.

2. VERIFY ORC CONFIGURATION
1. Replace or reprogram the TIPM. Totally Integrated Power Module (TIPM) - Removal.
2. Perform the BODY VERIFICATION TEST. Body Verification Test.
3. Turn the ignition on.
4. With the scan tool, read the ORC DTCs.
5. Cycle the ignition Off and then On.
6. With the scan tool, read the ORC DTCs.

Does the scan tool display active B1C1C-PASSENGER ACTIVE HEADREST CONTROL CIRCUIT MISMATCH DTC?

Yes

- Replace the ORC. Occupant Restraint Controller - Removal.
- Perform the RESTRAINTS SYSTEM INTERMITTENT TEST. Restraints System Intermittent Condition Test.

No

- Test Complete, the condition or conditions that originally set this DTC are not present at this time.
- Perform the RESTRAINTS SYSTEM INTERMITTENT TEST. Restraints System Intermittent Condition Test.