How Do I Fix The Cooling Fan 1 Control Circuit Malfunction?

1. Replacing the VSS sensor.
2. Replacing the engine coolant temp sensor.
3. Repairing or replacing of the fan wiring harness.
4. Replacing cooling fan 1.
5. Repairing electrical connection issues.
6. Replacing AC pressure switch.
7. Replacing the fan control relay.

Does the PCM control the cooling fan?

The Powertrain Control Module (PCM)

monitors coolant temperature via a coolant sensor

and cycles the electric cooling fan(s) on and off as needed to fine-tune engine cooling.

What causes cooling fan to stop working?

Six things may prevent an electric cooling fan from coming on:

Defective temperature switch, coolant sensor or other sensor

.

Engine thermostat is stuck OPEN

(engine never gets hot enough to turn on the fan) Faulty fan relay.

How do I fix code p0691?

1. Replacement of the blown fuse.
2. Repair or replacement of the open or shorted wiring between the PCM and the fuse.
3. Repair or replacement of cooling fan relay.
4. Repair or replacement of cooling fan motor.

What is a fan 1 control circuit?

Diagnostic Trouble Code (DTC) P0480 stands for “Fan 1 Control Circuit.” The

engine cooling fan system is controlled and monitored by your vehicle's computer and various sensors

. The PCM detects the temperature increase through the coolant temperature sensor.

What to do when cooling fan stops working?

What happens if the cooling fan stops working? If your cooling fan stops working,

your engine could overheat

. This could cause damage to your engine parts. It's a serious issue and needs to be looked at by a garage.

How do I know if my fan control module is bad?

1. Cooling fans running for a long time. The cooling fans under the hood of your car are designed to keep the components of the system at a lower temperature. …
2. Cooling fans not running at all. …
3. Weakened air flow.

What is a cooling fan control module?

Description. The cooling fan module is

a complete electrical subsystem

. It is able to set the right speed for the fan. Due to the increasing amount of power consu- mers (power steering, air-conditioning etc.) it is necessary to protect the engine from overheating.

How do you test a PCM signal?

1. Your “check engine” light is on.
2. Other warning lights may be on, including traction control and ABS.
3. You lose fuel economy for no apparent reason.
4. Your car stutters when starting, requires multiple attempts, or won't start at all.
5. Stuttering or stalling during idling.

What controls the cooling fan?

The fans are controlled either with

a thermostatic switch or by the engine computer

, and they turn on when the temperature of the coolant goes above a set point. They turn back off when the temperature drops below that point. Rear-wheel drive cars with longitudinal engines usually have engine-driven cooling fans.

What happens if computer fan stops working?

A broken fan can cause your computer to overheat and damage internal components like the CPU, video card, hard drive and motherboard. Computer fans usually adjust their speed depending on the heat being generated by the computer. … If your computer's fan isn't working,

the hot air may have nowhere to go

.

Can I drive my car if the fan is not working?

Yes, technically

your engine does not need a cooling fan to operate

. … If the radiator does not have cool air blowing on it constantly, it will overheat eventually, so you'd need the perfect combination of weather and traffic to drive effectively without a radiator fan.

What happens if laptop cooling fan stops working?

This message usually appears when your laptop's fan isn't working properly, leaving your machine vulnerable to overheating. In most cases, your laptop shuts down

shortly after alerting you to your cooling problem

, effectively putting an end to your ability to keep using it.

How do I know if my cooling fan relay is bad?

1. The engine runs hot or overheats. …
2. The cooling fans don't work. …
3. The cooling fans keep running. …
4. Warning lights. …
5. Poor air conditioning performance. …
6. Swapping Relays. …
7. Measuring the Relay Coil's Resistance. …
8. Listening for Noises.

How do I test a fan relay?

1. Look at the markings on top or side of the relay case and locate the two control circuit terminals, which connect to the relay's coil, and the two power circuit terminals, which let electrical current pass to the fan. …
2. Connect the leads of an ohmmeter to the power terminals on the relay.

How do you bypass a cooling fan resistor?

The resistor just gives you the low speed fan. You can simply

bypass by unplugging the two wires connected to it and connect those together

. The result will be that when the low speed fan is called, you will get the full speed fan.