A/C Condenser Fan Circuit Troubleshooting

A/C Condenser Fan Circuit Troubleshooting

NOTE: Do not use this troubleshooting procedure if the fans are also inoperative with the A/C on. Refer to the symptom troubleshooting index. Heating/Air Conditioning

1. Check the No. 11 (30 A) fuse in the under-hood fuse/relay box, and the No. 10 (7.5 A) fuse in the under-dash fuse/relay box.

Are the fuses OK?

YES - Go to step 2.

NO - Replace the fuses, and recheck. If the fuses blow again, check for a short in the No. 11 (30 A) and No. 10 (7.5 A) fuses circuits

2. Remove the A/C condenser fan relay from the under-hood fuse/relay box, and test it.

Is the relay OK?

YES - Go to step 3.

NO - Replace the A/C condenser fan relay.

3. Measure the voltage between the No. 2 terminal of the A/C condenser fan relay 4P socket and body ground.






Is there battery voltage?

YES - Go to step 4.

NO - Replace the under-hood fuse/relay box.

4. Connect the No. 1 and No. 2 terminals of the A/C condenser fan relay 4P socket with a jumper wire.






Does the A/C condenser fan run?

YES - Go to step 5.

NO - Go to step 8.

5. Disconnect the jumper wire.
6. Turn the ignition switch to ON (II).
7. Measure the voltage between the No. 4 terminal of the A/C condenser fan relay 4P socket and body ground.






Is there battery voltage?

YES - Repair open in the GRN wire between the A/C condenser fan relay and the ECM/PCM.

NO - Repair open in the wire between the No. 10 (7.5 A) fuse in the under-dash fuse/relay box and the A/C condenser fan relay.

8. Disconnect the jumper wire.
9. Disconnect the A/C condenser fan 2P connector.
10. Check for continuity between the No. 1 terminal of the A/C condenser fan relay 4P socket and the No. 2 terminal of the A/C condenser fan 2P connector.






Is there continuity?

YES - Go to step 11.

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

11. Check for continuity between the No. 1 terminal of the A/C condenser fan 2P connector and body ground.






Is there continuity?

YES - Replace the A/C condenser fan motor.

NO - Check for an open in the wire between the A/C condenser fan and body ground. If the wire is OK, check for poor ground at G301.