A/C Condenser Fan High Speed Circuit Troubleshooting

A/C Condenser Fan High Speed 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. Connect the HDS to the DLC.

2. Check the DTCs by selecting the DTC MENU (DTCs) from the HDS Initial Inspection and Diagnostic Overview.

Is DTC P0532, P0533, P2184, and/ or P2185 indicated?

YES -

- DTC P0532 indicated: Go to A/C pressure sensor circuit low voltage troubleshooting DTC Troubleshooting.
- DTC P0533 indicated: Go to A/C pressure sensor circuit high voltage troubleshooting DTC Troubleshooting.
- DTC P2184 indicated: Go to ECT sensor 2 circuit low voltage troubleshooting DTC Troubleshooting.
- DTC P2185 indicated: Go to ECT sensor 2 circuit high voltage troubleshooting DTC Troubleshooting.

NO -

Go to step 3.

3. Check the No. 47 (30 A) and No. 31 (7.5 A) fuses in the under-dash fuse/relay box.

Is the fuse OK?

YES -

Go to step 4.

NO -

Replace the fuse(s), and recheck. If the fuse(s) blow again, check for a short in the No. 47 (30 A) and No. 31 (7.5 A) fuses circuit.

4. Remove the fan control relay from the auxiliary under-hood fuse/relay box, and test it Testing and Inspection.

Is the relay OK?

YES -

Go to step 5.

NO -

Replace the fan control relay.

5. Turn the ignition switch to ON (II).

6. Measure the voltage between fan control relay 5P socket terminal No. 5 and body ground.





Is there battery voltage?

YES -

Go to step 7.

NO -

Repair an open in the wire(s) between the under-dash fuse relay box, the A/C diode A, and the fan control relay.

7. Turn the ignition switch to LOCK (0).

8. Check for continuity between fan control relay 5P socket terminal No. 2 and body ground.





Is there continuity?

YES -

Go to step 9.

NO -

Check for an open in the wire between the fan control relay and body ground. If the wire is OK, check for poor ground at G401.

9. Remove the A/C condenser fan relay from the auxiliary under-hood relay box.

10. Check for continuity between fan control relay 5P socket terminal No. 3 and A/C condenser fan relay 4P socket terminal No. 3.





Is there continuity?

YES -

Go to step 11.

NO -

Repair an open in the wire between the fan control relay and the A/C condenser fan relay.

11. Jump the SCS line with the HDS.

NOTE: This step must be done to protect the powertrain control module (PCM) from damage.

12. Disconnect PCM connector A (49P).

13. Check for continuity between A/C condenser fan relay 4P socket terminal No. 3 and PCM connector A (49P) terminal No. 45.





Is there continuity?

YES -

Go to step 14.

NO -

Repair an open in the wire between the A/C condenser fan relay and the PCM.

14. Measure the voltage between body ground and A/C condenser fan relay 4P socket terminals No. 1 and No. 4 individually.





Is there battery voltage?

YES -

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

NO -

Repair an open in the wire(s) between the under-dash fuse/relay box, the A/C diode B, and the A/C condenser fan relay.