Radiator and A/C Condenser Fan High Speed Circuit Troubleshooting
Radiator and A/C Condenser Fan High Speed Circuit TroubleshootingNOTE:
- 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.
- Before performing symptom troubleshooting, check for powertrain DTCs.
1. Disconnect the A/C pressure switch 4P connector.
2. Turn the ignition switch ON (II).
3. Measure the voltage between the No. 3 terminal of the A/C pressure switch 4P connector and body ground.
Is there battery voltage?
YES - Go to step 4.
NO - Repair open in the wire between the radiator fan relay, the fan control relay and the A/C pressure switch.
4. Measure the voltage between the No. 2 terminal of the A/C pressure switch 4P connector and body ground.
Is there battery voltage?
YES - Replace the A/C pressure switch.
NO - Repair open in the wire between the A/C pressure switch and the A/C diode.