Radiator and A/C Condenser Fan Common Circuit Troubleshooting

Radiator and A/C Condenser Fan Common Circuit Troubleshooting

NOTE: Do not use this troubleshooting procedure if the A/C compressor is inoperative. Refer to the symptom troubleshooting index. Heating/Air Conditioning

1. Remove the radiator fan relay and A/C condenser fan relay from the under-hood fuse/relay box, and test them.

Are the relays OK?

YES - Go to step 2.

NO - Replace the relays.

2. Reinstall the relays.
3. Connect the ECM/PCM connector E (31P) terminal No. 12 to body ground with a jumper wire.






4. Turn the ignition switch ON (II).

Do the fans run?

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.

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