The cooling fan at the radiator is not starting whem the engine gets hot. The fan is ok, gave it some 12v from the battery to see. The "reader" that sits at the engine works fine too,as it´new. soo it somting between thats not giving a signal to the fan to get going???
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Cooling fan prob!!!!!!!!!!
- Thread starter Michael
- Start date
The cooling fan at the radiator is not starting whem the engine gets hot. The fan is ok, gave it some 12v from the battery to see. The "reader" that sits at the engine works fine too,as it´new. soo it somting between thats not giving a signal to the fan to get going???
maybe the fanswitch not pricy only around £5-10 but can be fidderly to change
Weel I have been at Reno, and they looked like a BIG ?????, changed the CTS reader on the left side of the engine,or what it´s called, but the one I had was fine! Still don´t work, so i´m going there on monday to have a word with them
I almost knew more about it, than the guys at Reno, and I´m not even a mecanic. Told them it wasn´t going to work........They looked like they didnt know what to do, and now my temp- meter in the dash is fu*ked to!!!
I thought the fan was controlled by the switch in the thermostat housing:
http://www.mcmillan-uk.com/clio/PICT2067.JPGhttp://www.mcmillan-uk.com/clio/PICT2067.JPG
thats correct.the computer has a defect mode where if there is an open circuit on the inj temp sensor it constantly runs the cooling fan.if you unplug the sensor and the fan kicks in you know all the wiring,relays etc are ok.the problem would then seem to be the sensor itself.
the ecu controls the fan via a relay in the engine fuse box on the n/s/f inner wing.what happens when you unplug the temp sensor on the engine? check the relays as they suffer from being corroded by water ingress.Quote: Originally posted by Michael on 13 March 2004
Code is: CB0D F008026
But i´m sure there is no fan temp switch........Can the ECU loose the data, since it dont make the signal? must be a wire or somthing, but have had a multimeter on to check, and they seems ok
When I unplug the sensor nothing happens.........Have looked at the relays in the box near the inner wing, and tryed to switch them as there is 2. The metalpins was not correded and seemed ok. Will check them again and take some WD 40 and spray the pins mabye his will solve it...........The sensor is brand new and I saw the engine temp. at Reno . as they had their computer connected to my car. The reading was correct.........
I have now tested the relay with 12v and it´s ok........When i make the connection with a wire the fan starts, so the signal from the ECU is not made. Had the multimeter on the wirepin at the relay socket but can´t find it in the socket that goes on the ECU??? should there be a wire from the ECU to the relay? In that case I think its broken and that is why I can´t get a reading.
there is a wire from the ecu to the relay.the ecu supplys an earth to the relay which activates it.the relay has 4 wires to it.2 thickiss wires(1 is a ing feed and one goes to the fan moter) the other 2 thinner wires are 1 is an ing feed and the other is the switchable earth from the ecu).cant check the exact pin locations until i can see a wiring diagram because there all at work.
