Cooling fan not coming on - ZX-6R Ninja kawasaki Motorcycles

you can disconnect the electrical plug on the rad cooling fan/s and run jumper wires directly to the motor contacts from the battery if it does not run replace the cooling fan motor. if the motor runs then check for a bad cooling fan relay. this is were its best to have a scan tool as you can see the coolant temp of the engine and the computer commanding the cooling fans to come on. if the computer commands the fans to come on then you have eliminated 2/3 of the system working.

Check cooling fan temp. switch.

1 fan is for cooling the motor and the other fan comes on when the ac is turned on or its very warm outside it 2 stage

Relay Driven Dual Cooling Fan Diagnostics

you can disconnect the fan(s) and run 12 volts directly to the fans to see if they are working...you need to check the following parts: there should be a fuse panel located inside the engine compartment...check the cooling fan fuses, the cooling fan relay, and possibly the cooling fan sensor located on the engine

then its probably a defective evaporator fan in the evaporator coil section of the freezer,if the fan doesn't run it won't move the cooled air and can't cool anything properly

Chevy dealer says will not come on until temperature reaches 219 f

The Cooling fan is Wired in in such a way so as to Automaticly Turn on Cooling Fan If the A/C is Switched ON. If "WITHOUT the A/C on" The Cooling Fan Doen NOT come ON Untill Engine. is @ 210-230 Degrees
There IS a Problem with the Engine COOLING SYSTEM, A Faulty Coolant Temp Sensor Will Cause this Problem. The Cooling fan is Also A Candidate For Testing.

Answering your Quwstion YES The Engine Coolant Temperture Sensor Tells the ECM What the TEMP Is and the ECM Grounds the Cooling FAN Relay to Turn ON Cooling FAN. Temp Sensor is the Usual Culpret, BUT Relay Comes in a CLOSE Second. Hope this Helps !!!

First question to you is.. Have you checked the wiring or ECU codes?




check the cooling fan switch on the back of the block, unplug the connector and jumper.
2 wires, turn ignition on and fan should come on...

if it does-----replace the cooling fan switch
if it doesnt----- go to the cooling fan relay on the pass side inner fender
panel behind the headlight and check it, besides the fan itself and the fuse, those are the only things in the system.

there is a relay in the junction box under the hood if the cooling fan is not coming on when the engine is at 180 degress you can take the a/c clutch relay and switch it with the fan relay. if the fans come on it's the relay if it still doesn't it's the temp sensor on the fan unit....please rate this