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Radiator and A/C Condenser Fan Common Circuit Troubleshooting




Radiator and A/C Condenser Fan Common Circuit Troubleshooting

NOTE:

- Do not use this troubleshooting procedure if the A/C compressor is inoperative. Refer to the symptom troubleshooting index.
- Before doing any symptom troubleshooting, check for powertrain DTCs Initial Inspection and Diagnostic Overview.

1. Remove the radiator fan relay and A/C condenser fan relay from the auxiliary under-hood relay box, and test them Testing and Inspection.

Are the relays OK?

YES -

Go to step 2.

NO -

Replace the relays.

2. Reinstall the relays.

3. Jump the SCS line with the HDS.

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

4. Disconnect ECM/PCM connector A (49P).

5. Connect the ECM/PCM connector A6 to body ground with a jumper wire.





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

Do the fans run?

YES -

Check for loose wires or poor connections at ECM/PCM connector A (49P). If the connections are good, substitute a known-good ECM/PCM, and recheck. If the symptom/indication goes away, replace the original ECM/PCM Service and Repair.

NO -

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

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