Xsara Vts Cooling Fan Staying On

[danpug 1]

I just changed the ecu coolant temp sensor on my xsara but now the fan is on permanemtly. Any ideas what could be causing this?

[Anthony 1,000]

Was it on permenantly before swapping the sensor?

 

On Phase 2 Xsara VTS's the cooling fan is controlled through the main ECU temp sensor AFAIK - on Phase 1's it's done using the seperate brown "Bitron" sensor.

[danpug 1]

Was it on permenantly before swapping the sensor?

 

On Phase 2 Xsara VTS's the cooling fan is controlled through the main ECU temp sensor AFAIK - on Phase 1's it's done using the seperate brown "Bitron" sensor.

 

No it was fine. Sounds like is that then, do i need to change back to the original green sensor and get a new brown one then?

[danpug 1]

I've swapped back to the original green sensor and the fan is still staying on...........

[Alastairh 47]

Is that an old or new sensor? Check the pins are making good contact. I've seen something similar on a ph2 vts before.

[danpug 1]

The replacement sensor was brand new, i've put the old one back on now. Its a phase 1 i presume being an R reg.

[welshpug 1,627]

green is for the ecu, brown for the fan.

 

fans will come on with the brown sensor unplugged as a failsafe, could be the control unit playing up, its a black bitron unit though im not sure where it is on the xsara, its under the nearside inner wing on a 306