Club 80-90 Forums

OOP. I just found an old post of yours Syncroandy. It shows how to wire the relay properly and I noticed this... 'Sender earth' -> ECU Sender earth input (not chassis earth) - commonly Brown/Blue It was a post about LED bulbs and the F47 signal I shall remedy that as soon as the proper relays arrive...

Well the changeover relay did the trick it seems. No hesitation and no fault codes so the ECU is seeing feasible signals from the brake switches and happy to ignore the fact that I'm apparently not using the clutch. When the new relays and the m10x 1.0 taps have arrived and I get a dry afternoon spa...

Scratch that! I misunderstood the open/closed relay meanings on the wiring diagrams and I need a changeover relay to break the circuit on the for F47 and F36. Which means that I will need a separate relay for the clutch if I go with my brake light switch on the banjo bolt. That will have to signal a...

Sorted I think. I had a very complex test setup with a separate relay for brake 2 and clutch and was initially ignoring brake 1. I took a feed from the rear brake light at the rear lamp connector temporarily and an earth from the side of the engine bay and got the relays working but still had the pa...

Nope, it was not active anyway. I activated it and still have the annoying pause. From the fact that it was the S13-2 cruise control switch that I had to separate, and that I had no engine hesitation when they were connected suggests that the ECU needs to see them connected initially and then discon...

On Sunday, I fitted the Brickwerks resistor and deleted the remainder of the EGR vacuum stuff, fitted the original red blue and black 3.5mm pipes to the shiny new n75 valve for the wastegate control (now have boost everywhere I go unless I go over 15psi ish which then trips limp mode so presume it i...

There's no way to join them and I am barking up the wrong tree?

1997 AHU ETDI The question is: When I first pull away in the van, it starts moving then has an annoying momentary drop in revs after which it is fine. Pulling away from my driveway, on a bend, if I have forgotten to rev it thoroughly before I try to pull away, I make a very ungainly and sometimes da...

Yes, I bought a brand new immo box in a panic when I had immobiliser issues recently (it was just a blown fuse which I found thanks to this forum), thought I could plug it in and start the van, but no, the Ecu presumably, needs to be told that it has a new immo box. I thought it was just a communica...

Does anyone know a way to find the 4 digit pin that VCDS requires to be able to do things like add new keys? I've been reading a lot of forums but I'm going round in circles. It is a golf MK 3 AHU engine, ECU, immobiliser and keys but I need to add a spare key and the nerd in me would like to be abl...

OK...new question  :D When i fit my brand new immobiliser box with the original key and coil thingy, I cant start the van so I am guessing that it will need to be programmed to the ECU. Does anyone here have a clue as to how to do that? I have Vcds lite, registered version and it happily talks to th...

I think I will buy a new one and keep the current one as a spare. In my panic last week I bought a brand new immobiliser unit which I shall be fitting and keeping my currently still working but 28 year old one as a spare. I have a whole new threads worth of questions now having had my head in tdi mo...

Thank you very much for your very useful response cobblers. I had assumed (like with the K line) that if I could talk to the ecu via the obd port which is tied into the immobiliser unit, then it must all be getting power. It takes power from the ignition live feed for the stereo. Which also happens ...

Awesome, thank you. I'll try not to forget my multimeter tomorrow and report back.

1997 VW Golf AHU tdi in a T3 van. Installed in 2014 I went to leave work the other evening and the van started for a second and then died. I am used to this happening occasionally when I forget to insert the golf key into the golf barrel and transponder ring in its hidden position. I checked the key...