A/C Condenser Fan Circuit Troubleshooting

A/C Condenser Fan Circuit Troubleshooting

NOTE:

- Do not use this troubleshooting procedure if the radiator fan and/or the A/C compressor is inoperative. Refer to the symptom troubleshooting index.

- Before doing symptom troubleshooting, check for powertrain DTCs. Initial Inspection and Diagnostic Overview

1. Check the No. 5 (20 A) and No. 21 (7.5 A) fuses in the under-hood fuse/relay box.

Are the fuses OK?
YES - Go to step 2.

NO - Replace the fuse(s), and recheck. If the fuse(s) blow again, check for a short in the No. 5 (20 A) fuse and the No. 21 (7.5 A) fuse circuits.


2. Test the A/C condenser fan relay. Testing and Inspection

Is the relay OK?
YES - Go to step 3.

NO - Replace the relay circuit board.


3. Disconnect the A/C condenser fan 2P connector.

4. Disconnect under-hood fuse/relay box connector C (14P).

5. Check for continuity between the under-hood fuse/relay box connector C (5P) No. 3 terminal and the A/C condenser fan 2P connector No. 2 terminal.

Is there continuity?
YES - Go to step 6.

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






6. Check for continuity between the A/C condenser fan 2P connector No. 1 terminal 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 G302.