Engine Coolant Temperature Sensor
WARNING: This page is about a different car, the 1999 Acura 3.0CL and 1999 Acura 2.3CL. However, it is still accessible from the selected car via links, so may be relevant.
- Check Malfunction Indicator Light (MIL). If light comes on, see appropriate ENGINE PERFORMANCE article. If light does not come on, turn ignition off. Remove stereo unit and disconnect climate control unit 20-pin connector. Disconnect engine coolant temperature sensor 2-pin connector. Measure voltage between ground and Red/White wire terminal of 20-pin connector. See Figure .
- If about 5 volts do not exist, repair open Red/White wire between climate control unit 20-pin connector and engine coolant temperature sensor. If about 5 volts do exist, check for loose wires or poor connections at climate control unit 20-pin connector and engine coolant temperature sensor.
- If connections are okay, substitute known-good climate control unit and recheck. If symptom does not exist after substituting known-good climate control unit, replace original climate control unit.