Radiator and Condenser Fans Common Circuit Troubleshooting

1.Check the No. 1 (20A) and No. 4 (20A) fuses in the under-hood fuse/relay box, and the No. 14 (10A) 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. 14 fuse in the under-dash fuse/relay box and the radiator fan relay socket, and the condenser fan relay socket.n


5.Turn the ignition switch OFF.

6.Reinstall the condenser fan relay.

7.Make sure the A/C switch is OFF.

8.Turn the ignition switch ON (II).

9.Measure the voltage between the No. 6 terminal of ECM/PCM connector B (24P) 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 B (24P). 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 socket, the condenser fan relay socket and the  ECM/ PCM.n