Engine Coolant Temperature (ECT) Sensor
- Ensure ignition is off. Disconnect electrical connector from ECT sensor. The ECT sensor is located in engine coolant passage near cylinder head or thermostat housing. To verify wire colors for proper identification, see appropriate wiring diagram information in articles listed below:
- Using ohmmeter, check resistance between ECT sensor electrical terminals. Resistance should be within specification at designated temperature. See Fig 1. Replace ECT sensor if resistance is not within specification.
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