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What causes the cooling fan speed sensor circuit to go bad on GM vehicles?
Wiki User
∙ 16y ago
The cooling fan speed sensor itself is not the culprit. The visco electric fan clutch goes into a lock-up state and the sensor picks up the overspeed condition.
Essentially the fluid silicone material inside goes hard and breaks up and then small pieces get stuck in the valve mechanisms. This causes the clutch to loose it's ability to release.
www.trailvoy.com has all the answers about the Trailblazer/Envoy/Brava platform vehicles
Wiki User
∙ 16y ago
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How does the cooling fan circuit work?
There is a temperature sensor in the motor. When it gets hot enough it completes a circuit and causes a relay to close and turns the fan on. There is power to the fan all the time, the sensor and relay supply the ground for the fan Engine cools down, the sensor opens and shuts the fan off.
Location of thermostat sensor to turn on engine cooling fans?
Most vehicles locate that sensor close to the thermostat housing.
What causes 1998 Honda civic o2 sensor heater circuit code?
9 time out of 10, the heater circuit internal to the sensor has failed. Replace the sensor.
Temp sensor causes car noT to start?
Yes, on some vehicles.
What causes P0533 and P0532?
P0532 A/C Refrigerant Pressure Sensor Circuit LowInputP0533 A/C Refrigerant Pressure Sensor Circuit HighInputP0533 -A/C Refrigerant Pressure Sensor Circuit High Input.possible causes, ACP circuit short to GND or SIGRTN.VREF circuit open.Damaged PCM.Open ACP circuit.Damaged ACP sensor.Possible Solution verify vref between 4 and 6 volts.
Cooling fan won't run for radiator What could cause this?
There is a sensor that detects temperature to turn the fan on in some vehicles, this sensor may need to be replaced.
What causes an O2 heater circuit malfunction on a IS 300?
The oxygen sensor is "done". It should be replaced.
What causes engine code p0193?
P0193 Fuel Rail Pressure Sensor Circuit High Input
What is Engine code 660?
Engine code 660 can mean different things for different vehicles. In motorcycles, it can mean that a circuit to a light is shut off or there is a bad fuse. In motor vehicles it pertains to the MAP (Manifold Absolute Pressure) sensor or an oxygen sensor.
Why does the cooling fan only come on when jumping the b a connections in the aldl 1992 sl1 sensor ohms are fine 5 volts going to sensor I have trouble codes 13 32 could that have to do with it?
Dtc you listed are the following 13 O2S Circuit 32 EGR Error doubtfull this has any thing to do with a cooling fan, only if there is a ECT sensor problem. Is you car overheating, and what is the coolant temp? At a certain temp seen by the ECM then the ECM will turn on the coolant fan. Usually in GM vehicles at 220 deg F and run till ECT is at about 200 deg F. Should provide more info what the problem you are having with the cooling fan. If access to a scan tool observe the ECT and when the fan turns on when running the vehicle. The Cowboy... Can pretty much guarantee the coolant sensor is faulty. The sensor is in the back of the head in the middle and has 2 wires to it The one wire sensor beside is for the coolant gauge. Check the sensor When you remove it you will find hairline cracks on the element of the sensor that causes improper readings.
What would cause the cooling fan to constantly run on a Mazda 626 1999 model?
Answer: If you mean your radiator cooling fan, it most likely is a grounded or shorted circuit from the "cooling fan sensor" (internal) or a pinched wire. Depends on when it happened: was there any work done prior to this happening? IF not, then the sensor is most likely the issue. In this case, once you find it (normally the sensor is screwed into the bottom of the radiator), unplug one of the wires (or remove the connector) and see if the cooling fan continues to run, if the fan turns off, then replace the sensor.
Where is the Subaru coolant temperature sensor located?
The coolant temperature sensor on a Subaru is located on top of the engine near the upper radiator hose. It constantly updates the vehicles computer to regulate the speed of the cooling fan.
