Pinpoint Tests AH: The Cruise Control On Indicator Is Never/Always On

Instrumentation, Message Center and Warning Chimes

Pinpoint Test AH: The Cruise Control On Indicator Is Never/Always On

Normal Operation

The Instrument Panel Cluster (IPC) receives the cruise control on signal from the PCM over the High Speed Controller Area Network (HS-CAN) communication bus. When the cruise control is turned on but not engaged, the PCM sends a message to the IPC to illuminate the cruise control on indicator.

If the cruise control on message is missing for less than 5 seconds, the cruise control on indicator remains in the last indication mode (on or off) based upon the last known good message received. If the cruise control on message is missing for more than 5 seconds, the IPC sets DTC U0100:00 in continuous memory and defaults the cruise control on indicator off.

NOTE: If DTC U0100:00 is set in the IPC, other observable symptoms may be an inoperative speedometer, tachometer or odometer.

This pinpoint test is intended to diagnose the following:

- PCM
- IPC


PINPOINT TEST AH: THE CRUISE CONTROL ON INDICATOR IS NEVER/ALWAYS ON

-------------------------------------------------
AH1 CHECK THE SPEED CONTROL OPERATION

- Check the cruise control system for correct operation.
- Does the cruise control operate correctly?

Yes
GO to AH2.

No
REFER to Cruise Control Testing and Inspection.

-------------------------------------------------
AH2 CARRY OUT THE IPC DEALER TEST MODE

- Ignition ON.
- Enter the IPC dealer test mode.
- Scroll through the displays to TELLTALE TEST and monitor the cruise control on (amber) indicator.
- Does the cruise control on (amber) indicator illuminate when in the dealer test mode and turn off when in normal operation mode?

Yes
GO to AH3.

No
INSTALL a new IPC. REFER to Instrument Panel Cluster (IPC) Instrument Panel Cluster (IPC). TEST the system for normal operation.

-------------------------------------------------
AH3 RETRIEVE THE RECORDED DTCs FROM THE IPC SELF-TEST

- Check for recorded DTCs from the IPC self-test.
- Is DTC U0100:00 recorded?

Yes
GO to Pinpoint Test BF. Pinpoint Tests BF: DTC U0100:00

No
INSTALL a new PCM. TEST the system for normal operation.

-------------------------------------------------