Was the Instrument Cluster Diagnostic System Check performed?

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Go to Step 2

Go to Diagnostic System Check - Instrument Cluster

1. Install the scan tool.
2. Select SPECIAL FUNCTIONS from the INSTRUMENT CLUSTER menu.
3. Command the coolant temperature gauge from H to C.

Does the gauge respond when commanded?

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Go to Step 3

Go to Step 4

1. Disconnect C105.
2. Turn ON the ignition switch.
3. Use a DMM to measure the voltage at terminal 11.

Is the voltage within the specified range?

B+

Go to Step 5

Go to Step 6

Replace the instrument cluster.

Is the replacement complete?

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Go to Step 8

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Check between terminal 11 of C105 and terminal 1 of C115 for an open circuit.

Was a circuit problem found and repaired?

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Go to Step 8

Go to Step 7

Locate and repair open circuit.

Was a circuit problem found and repaired?

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Go to Step 8

Go to Step 4

Replace the engine coolant temperature gauge sensor.

Is the replacement complete?

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Go to Step 8

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1. Connect all connectors and components that were removed in previous steps.
2. Verify that the coolant temperature guage operates properly.

Does the coolant temp gauge operate properly?

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System OK

Go to Step 2