Cooling fan not coming on

P0526
In order to maintain proper powertrain cooling requirements, and to reduce the cooling fan noise as it is in use, the PCM uses a signal from the cooling fan to assess its speed. If the speed of the fan is higher or lower than the manufacturer’s specifications, the PCM will store the code P0526.

What causes the P0526 code?
In most cases, the P0526 code is caused by a faulty cooling fan motor. However, this code may also be stored due to:

Faulty cooling fan relay
Corroded or loose electrical components
Faulty engine coolant temperature sensor
Shorted or open electrical wiring, which may cause a blown fuse
Faulty cooling fan

check fuses and coolant temp sensor
the coolant temperature sensor unit ( that is SENSOR not gauge sender unit) sends a report to the ecm to turn on the radiator fan when the temp is reached
If the fan is not coming on then the circuit is broken--sensor, wires ,fuses relay, fan-ecm
all have to be checked out

I need year--make--model to look up wiring info?

Check the temperature sender that controls the fan . Also check the fan fuse and relay in the underwood fuse and relay box.

check fuses and relay for the fan . Replace the coolant temperature sensor ( not the temperature gauge sender unit)

replace thermostat

I would first check the fan relays make sure they are good ..If no problem there then i would disconnect the wires going to the cooling fan..turn on your a/c ..that should activate the fan even if the vehicles cold ..see if you have voltage across the wires plug the meter right into the wire you should have 12 volts..if you do then its the fan..if the fan comes on during a/c but dont come when vehicle gets hot,then its probably the temperature senser that tells the fan to come on..Its located near the thermostat.

Hi,
Firstly check that the engine is actually over heating, you may have a faulty water temperature sender unit.
Also check your gauge is ok, disconnect the water temp sender wire and the gauge should either go to hard hot or cold. If neither happens your gauge is faulty.
Let me know how you get on.
Also check your fans are coming on to cool the radiator, if the engine is getting to over half way on the temperature gauge and the fans are not coming on then you have a faulty coolant fan sensor.
Replace this and you should be ok after that.
Thanks
Jason

u should check for a faulty thermostat first, they are only a few quid and easily replaced. if no change ur most likely faults are a blocked radiator or faulty water pump. u dont sayhow old ur van is but after the thermostat go to the radiator, when its hot check the bottom of the rad to make sure its hot, also brown water means u need to bback flush ur cooling system. even tho u have changed some sensors doesnt mean u got the fan switch sender, dash board sender and fan sender tend to be different sensors, so just double check.

If the radiator fan isn't coming on I would check the coolant temperature sensor which tells the fan to turn on. Check your owners manuel for locations of fuses or relays that control the fan. Lastly you can unplug the fan and direct jumper it to make sure the motor isn't burnt out. I hope this helps.