Diesel Data: Automotive Repair

Radiator Cooling Fan Motor: Testing and Inspection

COOLING FAN MOTOR COMPONENT INSPECTION [LF, L3]
1. Perform the cooling fan control system inspection.
- If the cooling fan control does not operate properly, inspect the following.
- ECT sensor
- A/C switch
- A/C refrigerant pressure switch (High/low pressure)
- A/C refrigerant pressure switch (Middle pressure)
- VSS
- A/C magnetic clutch
- Fan control module power supply circuit
- Fan control module ground circuit
- Fan control signal circuit (between fan control module terminal B and PCM terminal 1Y*1, 1W*2, 1R*3)
- If the all items are normal, replace the cooling fan component.
*1: California emission regulation applicable model
*2: Except for California emission regulation applicable model with LF ATX
*3: Except for California emission regulation applicable model with LF MTX, L3