Accord EX Coupe V6-3.0L (2001)
Coolant Temperature Sensor / Switch HVAC: Testing and Inspection
1. Check the malfunction indicator lamp (MIL).
Does the malfunction indicator lamp come on?
YES - Refer to Computers/Testing/Diagnostic Strategies.
NO - Go to step 2.
2. Turn the ignition switch OFF.
3. Disconnect the ECT sensor 2P connector.
4. Disconnect the climate control unit 8P connector.
5. Turn the ignition switch ON (II).
6. Measure the voltage between the No.3 terminal of the climate control unit 8P connector and body ground.
Is there approximately 5 volts?
YES - Check for loose wires or poor connections at the climate control unit 8P connector and at the ECT sensor 2P connector. If the connections
are good, substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control
unit.
NO - Repair open in the wire between the climate control unit and the ECT sensor.