STEP 3. Measure the sensor supply voltage at engine coolant temperature sensor harness side connector.
(1) Disconnect the engine coolant temperature sensor connector and measure at the harness side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal WTS line and ground.- Voltage should be between 4.5 and 4.9 volts.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the measured voltage between 4.5 and 4.9 volts?
Go to Step 5. Go to Step 4.