W/Harness Inspection

Engine Control
P0480 Fan 1 Control Circuit - Inspection/Repair:_:W/Harness Inspection

Terminal and Connector inspection

1. Many malfunctions in the electrical system are caused by poor harness and terminal connections.
Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?






Power Circuit Inspection

Check Voltage
1. IG "OFF" and disconnect Cooling fan module connector.
2. IG "ON".
3. Measure voltage between power supply terminal of Cooling fan module harness connector and chassis ground.

Specification :Approx. 12V








4. Is the measured voltage within specification ?






Control Circuit Inspection

Check signal waveform
1. IG "OFF" and disconnect Cooling fan module connector.
2. IG "ON".
3. Check if the cooling fan is controlled in the way of PWM control by ECM when the cooling system operates.








4. Is the measured signal waveform normal?