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

Instrumentation, Message Center and Warning Chimes

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

Normal Operation

The Instrument Cluster (IC) receives the cruise control signal from the PCM over the High Speed Controller Area Network (HS-CAN) communication bus. When the cruise control is engaged, the PCM sends a message to the IC (Instrument Cluster) to illuminate the cruise control indicator. If the cruise control message is missing for more than 5 seconds, the IC (Instrument Cluster) sets DTC U0100 in continuous memory and defaults the cruise control indicator off. If the cruise control message is deemed invalid for more than 5 seconds, the IC (Instrument Cluster) sets DTC U2023 in continuous memory and defaults the cruise control indicator off.

NOTE: If DTC U0100 is set in the IC (Instrument Cluster), other observable symptoms may be an inoperative speedometer, tachometer or odometer.

This pinpoint test is intended to diagnose the following:

- PCM

- IC (Instrument Cluster)

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

X1 CHECK THE CRUISE CONTROL OPERATION

- Check the cruise control system for correct operation.

Does the cruise control operate correctly?

Yes
GO to X2.

No
REFER to Fire Suppression System.

X2 CARRY OUT THE IC (Instrument Cluster) INDICATOR LAMP CONTROL ACTIVE COMMAND USING THE SCAN TOOL

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: IC (Instrument Cluster) DataLogger.

- Select the IC (Instrument Cluster) cruise control indicator (CRUISE) active command. Command the cruise control indicator on and off while observing the cruise control indicator.

Does the cruise control indicator illuminate when commanded on and turn off when commanded off?

Yes
GO to X3.

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

X3 RETRIEVE THE RECORDED DTCs FROM THE IC (Instrument Cluster) SELF-TEST

- Check for recorded IC (Instrument Cluster) DTCs from the self-test.

Are any DTCs recorded?

Yes
For DTC U0100, GO to Pinpoint Test AO. Pinpoint Test AO: DTC U0100

For DTC U2023, RETRIEVE and REPAIR all non-network DTCs in the PCM and other modules on the network. REFER to the Computers and Control Systems Information and Body Control Systems for a list of all DTCs.

For all other DTCs, REFER to DTC Charts. Instrumentation, Message Center and Warning Chimes

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