Pinpoint Test D: Incorrect Temperature Gauge Indication

Instrumentation, Message Center and Warning Chimes

Pinpoint Tests

Pinpoint Test D: Incorrect Temperature Gauge Indication

Normal Operation

The PCM receives the Engine Coolant Temperature (ECT) status through hardwired circuitry to the ECT sensor. The Instrument Cluster (IC) receives the ECT data from the PCM over the communication network. The IC monitors the ECT data received from the PCM and commands the ECT gauge pointer.

This pinpoint test is intended to diagnose the following:

- PCM
- IC



PINPOINT TEST D: INCORRECT TEMPERATURE GAUGE INDICATION

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D1 RETRIEVE THE RECORDED DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND PCM SELF-TESTS


- Check for recorded PCM DTCs from the continuous and on-demand self-tests.
- Are any DTCs recorded?

Yes
REFER to Computers and Control Systems Information.

No
GO to D2.

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D2 CARRY OUT THE IC COOLANT TEMPERATURE GAUGE ACTIVE COMMAND USING THE SCAN TOOL


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: IC DataLogger.
- Select the IC temperature gauge (ENGCOOLNT) active command on and off while monitoring the temperature gauge.
- Does the temperature gauge start at C (cold) when at 0%, and move to H (hot) at 100%?

Yes
INSTALL a new PCM. 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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