Fan control problems.
rhandwor
06-17-2018, 06:35 PM
What sends the signal to the high speed radiator fan circuit. I think the ECU completes the ground for the high speed relay.
My other vehicles had two fans and the ac was turned on the other fan run. This vehicle has a two speed fan. Does the coolant temperature sensor tell the ECU when the temperature is high and completes the ground for the high speed relay.
My other vehicles had two fans and the ac was turned on the other fan run. This vehicle has a two speed fan. Does the coolant temperature sensor tell the ECU when the temperature is high and completes the ground for the high speed relay.
rhandwor
06-19-2018, 06:44 PM
What sends the signal to the high speed radiator fan circuit. I think the ECU completes the ground for the high speed relay.
My other vehicles had two fans and the ac was turned on the other fan run. This vehicle has a two speed fan. Does the coolant temperature sensor tell the ECU when the temperature is high and completes the ground for the high speed relay.
I hooked up my scanner and put it on data stream and monitored the operating temperature. A new Gates thermostat fixed the problem.
I used a logic probe and the high speed relay was getting proper signal, This vehicle will set a code when unplugged.
My other vehicles had two fans and the ac was turned on the other fan run. This vehicle has a two speed fan. Does the coolant temperature sensor tell the ECU when the temperature is high and completes the ground for the high speed relay.
I hooked up my scanner and put it on data stream and monitored the operating temperature. A new Gates thermostat fixed the problem.
I used a logic probe and the high speed relay was getting proper signal, This vehicle will set a code when unplugged.
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