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Test H: Temperature Gauge Inaccurate

  1. Disconnect Sensor

    Ensure temperature sensor connector is in good condition. Turn ignition off. Disconnect coolant temperature sensor. Turn ignition off. If temperature gauge indicates does not indicate cold, go to next step. If temperature gauge indicates cold, go to step 3).

  2. Check Red/White Wire For Short To Ground

    Turn ignition off. Measure resistance of Red/White wire between coolant temperature sender connector and ground. If resistance is more than 10 k/ohms, go to step 4). If resistance is less than 10 k/ohms, repair Red/White wire. Retest system.

  3. By-Pass Temperature Sensor

    Connect a jumper wire between the 2 pins of temperature sensor harness connector. If temperature gauge indicates hot, replace coolant temperature sensor. If temperature gauge does not indicate hot, go to step 5).

  4. Check Red/White Wire For Short To Ground

    Turn ignition off. Disconnect instrument cluster harness connector C237. Measure resistance between instrument cluster harness connector C237 pin No. 9 (Red/White wire) and ground. If resistance is more than 10k/ohms, repair/replace instrument cluster. If resistance is less than 10 k/ohms, repair short to ground in Red/White wire. Check gauge operation.

  5. Check Red/White Wire & Pink/Orange Wire For Open

    Turn ignition off. Disconnect instrument cluster harness connector C237. Measure resistance between C237 pin No. 9 (Red/White wire) and pin No. 5 (Pink/Orange wire). If resistance is less than 5 ohms, repair/replace instrument cluster. If resistance is greater than 5 ohms, repair open Red/White or Pink/Orange wire. Retest system.
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