Radiator and Condenser Fans Common Circuit Troubleshooting

NOTE: Do not use this troubleshooting procedure if only one fan is inoperative, or it the compressor is inoperative, refer to the symptom troubleshooting index.

1.Check the No. 9 (20A) and No. 11 (20A) fuses in the under-hood fuse/relay box, and the No. 30 (7.5A) fuse in the under-dash fuse/relay box.

Are the fuses OK?


YES - Go to 2.


NO - Replace the fuse(s), and recheck.n


2.Remove the condenser fan relay from the under-hood fuse/relay box.

3.Turn the ignition switch ON (II).

4.Measure the voltage between the No. 3 terminal of the condenser fan relay 4P socket and body ground.

Is there battery voltage?


YES - Go to 5.


NO - Repair open in the wire between the No. 30 fuse in the under-dash fuse/relay box and the condenser fan relay.n


5.Turn the ignition switch OFF.

6.Reinstall the condenser fan relay.

7.Make sure the A/C switch is OFF, and the engine coolant temperature is below 30°C (199°F).

8.Turn the ignition switch ON (II).

9.Measure the voltage between the No. 12 terminal of ECM/PCM connector E (31P) and body ground with the ECM/PCM connectors connected.

Is there battery voltage?


YES - Check for loose wires or poor connections at ECM/PCM connector E (31P). If the connections are good, substitute a known-good ECM/PCM, and recheck. If the symptom/indication goes away, replace the original  ECM/PCM.n


NO - Repair open in the wire between the radiator fan relay, the condenser fan relay, and the ECM/PCM.n