Pinpoint Test 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 (Instrument Panel Cluster) 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 (Instrument Panel Cluster) 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 (Instrument Panel Cluster) , other observable symptoms may be an inoperative speedometer, tachometer or odometer.
This pinpoint test is intended to diagnose the following:
- PCM
- IPC (Instrument Panel Cluster)
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 Fire Suppression System.
AH2 CARRY OUT THE IPC (Instrument Panel Cluster) DEALER TEST MODE
- Ignition ON.
- Enter the IPC (Instrument Panel Cluster) 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 (Instrument Panel Cluster). REFER to Instrument Panel Cluster (IPC) . TEST the system for normal operation.
AH3 RETRIEVE THE RECORDED DTCs FROM THE IPC (Instrument Panel Cluster) SELF-TEST
- Check for recorded DTCs from the IPC (Instrument Panel Cluster) self-test.
Is DTC U0100:00 recorded?
Yes
GO to Pinpoint Test BF. Pinpoint Test BF: DTC U0100:00
No
INSTALL a new PCM. TEST the system for normal operation.