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

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests

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

Normal Operation

The cruise control status information is sent to the Instrument Cluster (IC) 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 concern
- PCM
- IC



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

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Q1 CHECK THE CRUISE CONTROL OPERATION


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

Yes
GO to Q2.

No
REFER to Fire Suppression System.

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Q2 RETRIEVE THE RECORDED DTCs FROM THE IC SELF-TEST


- Check for recorded IC DTCs from the self-test.
- Are any DTCs recorded?

Yes
For DTC U1900, REFER to Information Bus.

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

No
GO to Q3.

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Q3 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 (CRUISE) active command. Command the cruise control indicator on and off. Observe the cruise control indicator.
- Does the cruise control indicator illuminate when commanded on, and turn off when commanded 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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