| 1. | Check the malfunction indicator lamp (MIL). Does the malfunction indicator lamp come on? YES - Refer to the fuel and emissions section.n NO - Go to 2. |
| 2. | Turn the ignition switch OFF. |
| 3. | Disconnect the ECM sensor 2P connector. |
| 4. | Disconnect climate control unit connector A (12P). |
| 5. | Turn the ignition switch ON (II). Measure the voltage between the No.12 terminal of climate control unit connector A (12P) and body ground.
Is there about 5 V? YES - Check for loose wires or poor connections at climate control unit connector A (12P) 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.n NO - Repir open in the wire between the climate control unit and the ECT sensor.n |