ecu....some help

Paul4x4 wrote: I can't really help with your problem, but at least I can tell you that a/c system works on it's own, and the ecu has nothing to do with it.

are you sure? i remember when i was wiring in the facelift dash to mine i looked at the wiring diagram and there was one or two wires from the heater controls that went to the ecu.

toph wrote:

Paul4x4 wrote: I can't really help with your problem, but at least I can tell you that a/c system works on it's own, and the ecu has nothing to do with it.

are you sure? i remember when i was wiring in the facelift dash to mine i looked at the wiring diagram and there was one or two wires from the heater controls that went to the ecu.

No, I wasn't sure :laugh:

But now I dug up some wiring diagrams, and it seems like you're right. There's one wire coming from the ecu, and that controls the fan relay and the compressor relay. But if the compressor is working, there is nothing wrong there, so the problem is still at the fan.

I think that the a/c is working, but because the fan doesn't work, condenser won't cool down the gas in the system back into liquid form. That's why there's no cooled air coming inside the car.

So, I still believe that when the fan problem is solved, everything works after that.

It sounds like there is two problems here , fan is one and if the air in the car is not that cool then most likely it is your reciver dryer that is most likely to be at fault.

Steve.

Paul you have absolute right....the fan must work , differently it does not function the a/c.
Steve the pressure checked with a manometer... the a/c compressor is working if i short-circuit the relay.
No cool air will come to the cabin until the a/c compressor start working---->fan problem

tasos wrote: Paul you have absolute right....the fan must work , differently it does not function the a/c.
Steve the pressure checked with a manometer... the a/c compressor is working if i short-circuit the relay.
No cool air will come to the cabin until the a/c compressor start working---->fan problem

Ok, if the compressor doesn't turn on like it should, then the fan relay might be broken. In the wiring diagram it shows that ecu gives a signal to the fan relay, and then the fan relay activates the compressor relay. But if the fan relay is ok, the problem might be in the ecu after all. :blink:

Sorry I read your post wrong.

Can you post or pm me the wiring diagram, and I can advise you from there.


Steve