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Test D: Temperature Gauge Inaccurate

  1. Turn ignition off. Disconnect Engine Coolant Temperature (ECT) sensor connector. ECT sensor is located on right rear side of engine. Connect fused jumper between ECT sensor Blue/White wire terminal and ground. Turn ignition on. If temperature gauge indicates "H", replace ECT sensor. Retest system. If temperature gauge does not indicate "H", go to next step.
  2. Turn ignition off. Disconnect instrument cluster connector C267A. Measure resistance of Blue/White wire between ECT sensor connector terminal and instrument cluster connector C267A terminal No. 2. Resistance should be less than 5 ohms. See Figure. Measure resistance between ground and instrument cluster connector C267A terminal No. 2 (Blue/White wire). Resistance should be more than 10 k/ohms. If both resistances are as specified, replace instrument cluster and retest. See ELECTRONIC INSTRUMENT CLUSTER  under REMOVAL & INSTALLATION. If either resistance is not as specified, repair open or short to ground in Blue/White wire. Retest system.
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