U1110-00

U1110-00-LOST VEHICLE SPEED MESSAGE

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

Theory of Operation

The Electronic Pedestrian Protection Module (EPPM) receives the vehicle speed signal over the CAN C bus from the Anti-lock Brake Module (ABS), Electronic Stability Program (ESP), and Electronic Stability Control (ESC).

- When Monitored:
Ignition on.

- Set Condition:
The EPPM does not receive a vehicle speed signal from the Anti-Lock Brake Module (ABS), Electronic Stability Program (ESP) and Electronic Stability Control (ESC) over the CAN C bus. The Airbag Warning Lamp (AWL) on while faulted condition is active. The AWL will go off as soon as the fault condition is removed and the fault causing the lamp to be "on" dematures.





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

Diagnostic Test

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 EPPM SYSTEM INTERMITTENT TEST diagnostic procedure. EPPM System Intermittent Test.

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

Do any of the following DTCS or any DTCS set, DTC U0121-LOST COMMUNICATION WITH ANTI-LOCK BRAKE SYSTEM (ABS) CONTROL MODULE, U0422-00-IMPLAUSIBLE DATA RECEIVED FROM BODY CONTROL MODULE (TIPM)?

Yes

- Testing and Inspection and perform the appropriate diagnostic procedure.

No

- Replace and program the Electronic Pedestrian Protection Module (EPPM). Electronic Pedestrian Protection Module - Removal.
- Perform the EPPM SYSTEM VERIFICATION TEST. EPPM System Verification Test.