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

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests

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

Normal Operation

The Instrument Panel Cluster (IPC) receives the cruise control engaged 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 IPC to illuminate the cruise control engaged indicator.

If the cruise control engaged message is missing for less than 5 seconds, the cruise control engaged indicator remains in the last indication mode (on or off) based upon the last known good message received. If the cruise control engaged message is missing for more than 5 seconds, the IPC sets DTC U0100:00 in continuous memory and defaults the cruise control engaged 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 AG: THE CRUISE CONTROL ENGAGED INDICATOR IS NEVER/ALWAYS ON

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AG1 CHECK THE CRUISE CONTROL OPERATION


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

Yes
GO to AG2.

No
REFER to Fire Suppression System.

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AG2 CARRY OUT THE IPC INDICATOR LAMP CONTROL ACTIVE COMMAND USING THE SCAN TOOL


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: IPC DataLogger .
- Select the IPC cruise control engaged indicator (CRUISE) active command. Command the cruise control engaged indicator on and off while observing the cruise control engaged indicator.
- Does the cruise control engaged indicator illuminate when commanded on, and turn off when commanded off?

Yes
GO to AG3.

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

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AG3 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.

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