COOLING FAN SYSTEM(w/ Towing Package) PROBLEM SYMPTOMS TABLE

Tip:

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table.

Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.

Table 1. Cooling Fan System
Symptom	Suspected Area	Link
Cooling fans do not operate	CAN communication system (for LHD with Central Gateway ECU)	Click here
	CAN communication system (for LHD without Central Gateway ECU)	Click here
	CAN communication system (for RHD with Central Gateway ECU)	Click here
	CAN communication system (for RHD without Central Gateway ECU)	Click here
	Engine coolant temperature sensor	Click here
	Cooling fan motor	Click here
	No. 2 cooling fan motor	Click here
	FAN NO. 1 relay	Click here
	FAN NO. 2 relay	Click here
	Cooling fan circuit	Click here
	Cooling fan ECU	Click here
	No. 2 Cooling fan ECU	Click here
	ECM	Click here
Cooling fans do not stop (continue to operate)	CAN communication system (for LHD with Central Gateway ECU)	Click here
	CAN communication system (for LHD without Central Gateway ECU)	Click here
	CAN communication system (for RHD with Central Gateway ECU)	Click here
	CAN communication system (for RHD without Central Gateway ECU)	Click here
	Engine coolant temperature sensor	Click here
	Cooling fan circuit	Click here
	Cooling fan ECU	Click here
	No. 2 Cooling fan ECU	Click here
	ECM	Click here
Cooling fan speed does not change	CAN communication system (for LHD with Central Gateway ECU)	Click here
	CAN communication system (for LHD without Central Gateway ECU)	Click here
	CAN communication system (for RHD with Central Gateway ECU)	Click here
	CAN communication system (for RHD without Central Gateway ECU)	Click here
	Cooling fan circuit	Click here
	Cooling fan ECU	Click here
	No. 2 Cooling fan ECU	Click here
	ECM	Click here