Normal Operation
For all speed control systems, the PCM sends a signal through circuit VES10 (WH) to the speed control switches which passes through the clockspring. The return signal is sent through circuit RES08 (GN/BN) and the clockspring. The speed control system deactivates when the brake pedal is applied or the speed control OFF switch is pressed. On vehicles with the adaptive cruise control system, the Cruise-Control Module (C-CM) communicates with the Instrument Panel Cluster (IPC), ABS module and PCM over the High Speed Controller Area Network (HS-CAN). A fault in the C-CM causes an inoperative condition for the speed control system and a message is displayed in the message center.
DTC DESCRIPTION CHART
| DTC Description | Fault Trigger Conditions |
|---|---|
|
A continuous DTC that sets when the C-CM does not receive the electronically-controlled deceleration activity status message from the ABS module. |
|
A continuous DTC that sets when the C-CM does not receive the ignition switch position (gateway) message from the IPC . |
|
A continuous DTC that sets when the ABS module does not receive the adaptive cruise control brake status message from the C-CM . |
|
A continuous DTC that sets when the ABS module receives invalid data from the C-CM . |
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- PCM not configured for speed control
- Speed control switch
- Speed control sensor alignment (with adaptive cruise control)
- Digital Transmission Range (TR) sensor
- Vehicle speed signal
- PCM
- C-CM (with adaptive cruise control)
- ABS module (with adaptive cruise control)
- IPC (with adaptive cruise control)