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

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests

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

Normal Operation

The Instrument Cluster (IC) receives the cruise control data from the PCM over the High Speed Controller Area Network (HS-CAN). When the cruise control is engaged, the PCM provides a signal to the IC to illuminate the cruise control indicator.

This pinpoint test is intended to diagnose the following:

- Cruise control system
- PCM
- IC



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

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R1 CHECK THE CRUISE CONTROL OPERATION


- Verify the cruise control operates.
- Does the cruise control operate correctly?

Yes
GO to R2.

No
REFER to Fire Suppression System.

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R2 CARRY OUT THE IC INDICATOR LAMP ACTIVE COMMAND USING THE SCAN TOOL


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: IC DataLogger.
- Select the IC cruise control indicator (SC_SET) active command on and off. Observe the cruise control indicator.
- Does the cruise control indicator illuminate when selected on and turn off when selected off?

Yes
INSTALL a new PCM. REFER to Computers and Control Systems. TEST the system for normal operation.

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

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