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2nd-July-2009, 21:11
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Senior Member
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Join Date: Sep 2008
Location: Rotherham uk
Posts: 5,384
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Re: how do i......
as soon as aircon goes on temp rises and fans dont kick in, i suspect fans are faulty, once its confirmed i can replace em or find the bloody fault. the mod would be a good idea tho for peace of mind!
__________________
running the world's first P38 with a pre-heater on it, yep it's toasty again allright (new unit in, this very morning, piece of piss) !!!
fuck the new year, it cold and miserable!!
Quote:
Originally Posted by kds
Well gav, from reading threads on here you.re clued up on computer stuff, fix engines, know door locks inside out and now learning to sign, I take my hat off to you sir an all round top bloke
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2nd-July-2009, 21:34
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Senior Member
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Join Date: Feb 2009
Location: Near Poitiers SW France
Posts: 2,219
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Re: how do i......
Quote:
Originally Posted by The Mad Hat Man
I would suggest it is the ECU trigger that is faulty.
If you dont want ECU control, just leave it in the manual mode - but it gives the option of reverting to ECU control easily if you ever have to.
I believe Fuse 8 is HEVAC, along with Radio and Cigar lighter (easy tap in there).
I believe the HEVAC ECU gets a squarewave signal from the ABS ECU,via the BeCM to control fan speed - might be checking this stuff to.
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The only thing that controls the fan speed unless I have missed something is the Trinary switch 1 on the air con, road speed may well control switch on and off. The alternator also provides a signal to HEVAC to say the engine is running.
Last edited by Datatek; 2nd-July-2009 at 21:36.
Reason: addition
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3rd-July-2009, 00:08
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Senior Member
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Join Date: Jul 2007
Location: Edenderry, Co. Offaly, Ireland
Posts: 3,290
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Re: how do i......
Operation of the fans can be forced for test purposes with diagnostics with the engine ECU software module to confirm their operation.
The trinary switch is fitted to the receiver/dryer located behind the front bumper..passenger side.
You could remove the grille, disconnect the harness plug to the fans and put a 12v+ wire to the Black & Red and Black & Brown wires to the fans and a second ground wire to the other spare pins on the fan plug leads. This will tell if the motors are ok, whereas the diagnostics force will prove the output from the ECU, via the relays to the fans. I fitted a supplementary temperature sensor set at 98deg on/90deg off to mine. Got an inlet manifold to top hose elbow for a 3.9 Classic which is tapped to take a temperature sensor, made up an adaptor to take the new sensor which has a M20 thread, mounted an external relay below the fuse box and used the sensor to trigger the relay coil, putting a fused 12v+ to the fan supply via the normally open relay contacts.I did this becuse I tow a twin axle caravan and was concerned in case the trinary switch failed, which it hasn't and I can also advise that the setup has never had cause to operate.
The sensor was Interpart and got it from a motor factors over here, they are used for triggering electric radiator fans.
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3rd-July-2009, 08:37
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Senior Member
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Join Date: Sep 2008
Location: Rotherham uk
Posts: 5,384
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Re: how do i......
why cant it just feckin work!! could bad earthing cause it not to work because ive had a couple of strange things happen lately!!!!
__________________
running the world's first P38 with a pre-heater on it, yep it's toasty again allright (new unit in, this very morning, piece of piss)!!!
fuck the new year, it cold and miserable!!
Quote:
Originally Posted by kds
Well gav, from reading threads on here you.re clued up on computer stuff, fix engines, know door locks inside out and now learning to sign, I take my hat off to you sir an all round top bloke
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3rd-July-2009, 09:04
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Senior Member
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Join Date: Sep 2008
Location: Rotherham uk
Posts: 5,384
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Re: how do i......
fans work, jumpered pins 3 & 5 on each of the following in turn:
relay 18 - both fans half mode
relay 13 - one fan full speed
relay 14 other fan full speed.
so where do i go from there, its obviosly in need of a signal. how do i provide a signal??
also had it on t4 thursday and the fella said he couldnt get it to force the fans, he didnt really try!!! AND he couldnt comunicate with the airbag system. he said the wires are corroded and its not letting him in. the wires for engine ecu arnt corroded cos he got in!! and as you know i can operate eas!!!
good job he didnt charge me!!!
__________________
running the world's first P38 with a pre-heater on it, yep it's toasty again allright (new unit in, this very morning, piece of piss)!!!
fuck the new year, it cold and miserable!!
Quote:
Originally Posted by kds
Well gav, from reading threads on here you.re clued up on computer stuff, fix engines, know door locks inside out and now learning to sign, I take my hat off to you sir an all round top bloke
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3rd-July-2009, 09:12
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Join Date: Apr 2009
Location: liverpool
Posts: 2,769
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Re: how do i......
i just had mine read and said the same but did add could well be wire behind stering wheel but did not have time to look at it igot airbag light on and srs
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3rd-July-2009, 09:19
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Senior Member
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Join Date: Sep 2008
Location: Rotherham uk
Posts: 5,384
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Re: how do i......
if its the rotary coupler then its gonna be expensive. check the blue plug is in the dash binnacle tho, take cover off under steering, the flat, interior coloured bit, and make sure there are 2 plugs in the speedo box!
__________________
running the world's first P38 with a pre-heater on it, yep it's toasty again allright (new unit in, this very morning, piece of piss)!!!
fuck the new year, it cold and miserable!!
Quote:
Originally Posted by kds
Well gav, from reading threads on here you.re clued up on computer stuff, fix engines, know door locks inside out and now learning to sign, I take my hat off to you sir an all round top bloke
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3rd-July-2009, 09:23
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Join Date: Apr 2009
Location: liverpool
Posts: 2,769
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Re: how do i......
going to have a look on sat feel like shit today think igot man flu horn gone off as well no end to silly things at least it still running touch wood
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3rd-July-2009, 09:38
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Senior Member
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Join Date: Oct 2007
Location: Gondwanaland
Posts: 8,902
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Re: how do i......
Quote:
Originally Posted by j the range
going to have a look on sat feel like shit today think igot Swine flu horn gone off as well no end to silly things at least it still running touch wood
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__________________
No sig
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3rd-July-2009, 10:21
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Senior Member
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Join Date: Jul 2007
Location: Edenderry, Co. Offaly, Ireland
Posts: 3,290
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Re: how do i......
Get it on Rovacom or Autologic.
You need to have the check done in order to find that the output is present from the engine ecu when triggered.
I have not heard my fans working for years, but all is well. It's like saying "My airbags don't work" everytime you hit a pothole!!
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