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Volkswagen Passat 1,9D TDI PD AVB 2004 - Fault for brake light switch #

Posted by Paul Howd on December 13, 2012, 4:42 pm

Year of Manufacture *: 2004
Engine Size and Code *: AVB
( Optional ) Scanner Used: Vag-Com

Am getting fault for brake switch. Tred new swich on grounds that they are common fault and inexpensive but to no avail.

Further investigation revealed that I am getting a residual 7.5 volts on one of the terminals on the brake switch connector that goes directly to the ECU even when it is disconnected. This should be 0v under these circumstances! (Autodata online has decided not to work so I cannot give you the actual terminal no, I had hoped to look it up while posting ) and I am assuming that this is causing the ECU to generate a fault code

It got too cold/dark for further investigation today but am wondering if anybody has seen this one before

Re: Volkswagen Passat (2004) 1,9D TDI PD AVB

Posted by Ian Baxter <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT1560' width='330' height='300' border=0 style='border:none;'> on December 13, 2012, 6:23 pm, in reply to "Volkswagen Passat (2004) 1,9D TDI PD AVB"
Ian Baxter

Hello Paul,
I may be a mile off but I would also check brake light bulbs for correct type and fitment.

Ian

Re: Volkswagen Passat (2004) 1,9D TDI PD AVB

Posted by Phillip Winkworth on December 13, 2012, 10:29 pm, in reply to "Volkswagen Passat (2004) 1,9D TDI PD AVB"
Message modified by board administrator December 14, 2012, 3:20 pm

Hi

What's the problem with the switch, fault code? I see you have vagcom have you scanned it and posted it on their site

Re: Volkswagen Passat (2004) 1,9D TDI PD AVB

Posted by Paul Howd <iframe src='https://members.boardhost.com/ukautotalk8/info/user=UKAT5151' width='330' height='300' border=0 style='border:none;'> on December 14, 2012, 9:16 am, in reply to "Re: Volkswagen Passat (2004) 1,9D TDI PD AVB"
Paul Howd

I will try that next time I see the car (After the weekend)

I finally got AD Online working last night (Worked under Firefox but not IE) and further investigation of the wiring diagrams suggests that the engine management one is somewhat "Misleading"

Will report back after I have returned to the car and checked light units.

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