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Volkswagen Transporter 1.9 AXC 2004 - Code P1654 and cooling fan issue - Fixed #

Posted by Mike Burgess on August 15, 2011, 7:49 pm

Year of Manufacture *: 2004
( Optional ) Engine Code or CC: AXC

Hi

I have a Volkswagen Transporter 1.9 2004, with and engine management code P1654. (Check DTC memory of instrument cluster). I have tried to clear the code but it still returns. I have an issue with the cooling fan staying on all the time. I have checked both radiator and temp sensors, but I am not sure if there is a fault with the ECU bolted to the left hand chassis near the fan sensor.Could this be the reason I can not clear the code.

Mike

Re: Volkswagen Transporter 1.9 P1654 code and cooling fan issue

Posted by aidan birley <iframe src='https://members4.boardhost.com/ukautotalk/info/user=UKAT2879' width='330' height='300' border=0 style='border:none;'> on August 15, 2011, 8:09 pm, in reply to "Volkswagen Transporter 1.9 P1654 code and cooling fan issue"
Aidan Birley

Mike

Can you do a global scan ? What codes are in the instruments ?

cheers Aidan

Re: Volkswagen Transporter 1.9 P1654 code and cooling fan issue

Posted by Mark Carter <iframe src='https://members4.boardhost.com/ukautotalk/info/user=UKAT1428' width='330' height='300' border=0 style='border:none;'> on August 15, 2011, 9:02 pm, in reply to "Re: Volkswagen Transporter 1.9 P1654 code and cooling fan issue"
Mark Carter

Hi, as Aidan says, this is what is known as a remote code. There will be a code in the instruments that the engine ECU has received via the CAN bus system and is reacting to. HTH

Regards Mark

Modern cars, Its all wizardry and witchcraft

Re: Volkswagen Transporter 1.9 P1654 code and cooling fan issue

Posted by Mike Burgess <iframe src='https://members4.boardhost.com/ukautotalk/info/user=ukat3060' width='330' height='300' border=0 style='border:none;'> on August 15, 2011, 10:02 pm, in reply to "Re: Volkswagen Transporter 1.9 P1654 code and cooling fan issue"

Hi Aidan. The only code I get when checking instruments is G17 out side air temperature, this will not clear.

Re: Volkswagen Transporter 1.9 P1654 code and cooling fan issue

Posted by Mike Burgess <iframe src='https://members4.boardhost.com/ukautotalk/info/user=ukat3060' width='330' height='300' border=0 style='border:none;'> on August 15, 2011, 10:09 pm, in reply to "Re: Volkswagen Transporter 1.9 P1654 code and cooling fan issue"
Michael Burgess

I will check out the out side sensor in the morning and report from there.

Re: Volkswagen Transporter 1.9 P1654 code and cooling fan issue

Posted by Mark Carter <iframe src='https://members4.boardhost.com/ukautotalk/info/user=UKAT1428' width='330' height='300' border=0 style='border:none;'> on August 15, 2011, 10:29 pm, in reply to "Re: Volkswagen Transporter 1.9 P1654 code and cooling fan issue"
Mark Carter

The Engine ECU can use this Info for plausibility checking of its own sensors.

Which one of the door mirrors is damaged?

Regards Mark.

Modern cars, Its all wizardry and witchcraft

Re: Volkswagen Transporter 1.9 P1654 code and cooling fan issue

Posted by Mike Burgess <iframe src='https://members4.boardhost.com/ukautotalk/info/user=ukat3060' width='330' height='300' border=0 style='border:none;'> on August 16, 2011, 8:01 am, in reply to "Re: Volkswagen Transporter 1.9 P1654 code and cooling fan issue"
Michael Burgess

Hi Mark. None of the door mirrors are damaged on this vehicle, but I will check to see if it has become disconnected.

Re: Volkswagen Transporter 1.9 P1654 code and cooling fan issue

Posted by Mark Carter <iframe src='https://members4.boardhost.com/ukautotalk/info/user=UKAT1428' width='330' height='300' border=0 style='border:none;'> on August 17, 2011, 6:34 pm, in reply to "Re: Volkswagen Transporter 1.9 P1654 code and cooling fan issue"
Mark Carter

Hi Mike,

How did you get on?

Regards Mark

Modern cars, Its all wizardry and witchcraft

Re: Volkswagen Transporter 1.9 P1654 code and cooling fan issue

Posted by Mike Burgess <iframe src='https://members4.boardhost.com/ukautotalk/info/user=ukat3060' width='330' height='300' border=0 style='border:none;'> on August 17, 2011, 9:42 pm, in reply to "Re: Volkswagen Transporter 1.9 P1654 code and cooling fan issue"

Hi Mark. Sorry I am a bit late getting back on this one, I could not find any connection problems with the mirrors. I did find a sensor behind the front grill, could this be the one on my vehicle. I am thinking that I may have a fault with the relay unit, that is fixed to the body near the lower radiator sensor.

Re: Volkswagen Transporter 1.9 P1654 code and cooling fan issue

Posted by Mark Carter <iframe src='https://members4.boardhost.com/ukautotalk/info/user=UKAT1428' width='330' height='300' border=0 style='border:none;'> on August 17, 2011, 10:47 pm, in reply to "Re: Volkswagen Transporter 1.9 P1654 code and cooling fan issue"
Mark Carter

Yes it is behind the front bumper/pannel.

I would sort the Temp sender before doing anything else.HTH

Regards Mark

Modern cars, Its all wizardry and witchcraft

Fixed #

Posted by Mike Burgess on August 30, 2011, 8:11 pm, in reply to "Re: Volkswagen Transporter 1.9 P1654 code and cooling fan issue"
Message modified by board administrator August 31, 2011, 8:14 am

Hi sorry I am late again at getting back to this one. I did check out the out side temp sensor, and found the wire broken up in the off side front wing area. It looks like some one had removed the bumper and forgot to disconnect the wires and pulled them apart. After repairing this the fan then ran correctly. Many thanks Mark for pointing me in the right direction.

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