Radiator and A/C Condenser Fans Common Circuit Troubleshooting

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

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

Are the fuses OK?

YES | - | Go to Step 2 .
NO | - | Replace the fuse(s), and recheck.■

1. Remove the A/C condenser fan relay from the under-hood fuse/relay box.

1. Turn the ignition switch ON (II).

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

Is there battery voltage?

YES | - | Go to Step 5 .
NO | - | Repair open in the wire between the No. 30 fuse in the under-dash fuse/relay box and the A/C condenser fan relay.■

1. Turn the ignition switch OFF.

1. Reinstall the A/C condenser fan relay.

1. Make sure the A/C switch is OFF, and the engine coolant temperature is below 93 °C (199 °F).

1. Turn the ignition switch ON (II).

1. 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 .■
NO | - | Repair open in the wire between the radiator fan relay, the A/C condenser fan relay, and the ECM/PCM.■