Radiator Cooling Fan: Testing and Inspection

Radiator Cooling Fan Control System Check

Wiring Diagram
Refer to Radiator Cooling Fan Control System Circuit Diagram.

Troubleshooting

WARNING:
Keep hands, tools, and clothing away from radiator cooling fan to prevent personal injury. This fan is driven by electric motor that can turn on whether or not the engine is running. The fan motor can start automatically in response to ECT sensor signal if ignition switch is at "ON" position.

NOTE:
^ For details about engine cooling fan operation, refer to "Cooling Fan Operation Description":
^ Before beginning troubleshooting, be sure to read Precautions for ECM Circuit Inspection.
^ When measuring circuit voltage, resistance and/or pulse signal of ECM.

Step 1-4:

Step 4-8:

Step 8-11:

Step 11-14: