Occupant Restraint Controller (ORC)

U1175-00-LOST IGNITION STATUS MESSAGE

For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The Electronic Pedestrian Protection Module (EPPM) receives the ignition status message over the CAN C bus from the Electronic Ignition System.

- When Monitored:
Ignition on.

- Set Condition:
The EPPM doesn't receive a vehicle ignition switch status signal from the Electronic Ignition System (EIS) over the CAN C bus for 25 seconds to set the active code. The EPPM receives a vehicle speed signal for over one second to recover and change to a stored code. The Airbag Warning Lamp (AWL) on while faulted condition is active.





Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting Procedure.

1. ACTIVE DTC

NOTE: For vehicle communication problems, use the scan tool to refer to the Network Review Screen. The screen depicts a high level view of the vehicle network. Fault and problem areas appear in red. Selecting any of the network components allows access to the source of the problem.

1. Ignition on, engine not running.
2. With a scan tool, select View DTCs.

Is the status Active for this DTC?

Yes

- Go To 2

No

- Perform the INTERMITTENT CONDITION diagnostic procedure. Intermittent Condition Test

2. U0121-LOST COMMUNICATION WITH ANTI-LOCK BRAKE SYSTEM (ABS) CONTROL MODULE ALSO SET
1. With a scan tool, select View DTCs.

Is the DTC U0121-LOST COMMUNICATION WITH ANTI-LOCK BRAKE SYSTEM (ABS) CONTROL MODULE OR ANY LOST COMMUNICATION DTCS also set?

Yes

- Perform the U0140-00-Lost Communication with BCM diagnostic procedure. U0140-00

No

- Replace and program the Powertrain Control Module (PCM). Powertrain Control Module - Removal.
- Perform the PCM/POWERTRAIN VERIFICATION TEST. Powertrain Verification Test.