Yes many VW's share the "same" cluster, audi TT and Golf4 interchange.....I got some pinouts today from someone from a UK TT forum....oh well heres his mail:
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Roderick,While nothing is impossible I think you are underestimating the complexity
of what you are trying to do...Your biggest problem will be to disable the
immobilizer chip - which wont be easy as the immobilizer code must tie up
with the code read by the transponder off a key, so unless you have the
matching key you will need to get one (and the matching barrel) and somehow
persuade an Audi dealer to recode the pod to the key...which he wont do
unless its in a car.. I ahve heard of a (dubious) organisation that claims
to be able to do the recodes independently of Audi but have no idea who they
are. Unless the immobilzer is disabled the pod will not function
sufficiently to be useful... you cant see the key and barrel in my pic...
Secondly, once you managed the above problem, the pod then looks for the
engine management system over the high-speed CANBus (even the early ones
with no 'Comfort' CANBus still do this). If it can't find it then various
alarms go off... and the pod disables many functions and the DIS will show
an DEF warning although the basics are usable...
For speedo and rev counter you will need to supply pulses at the appropriate
rate, pulse width, voltage and shape... 1 pulse per mph and 1 pulse per rev
For temp and fuel gauges you will need to provide appropriate variable
resistances to sensor ground and calibrate them, mimicing the TT's temp and
fuel senders
Anyhow, here are the pinouts and other info you may find useful... good luck
Irving...
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Now I only want use the speedo/tacho/coolant temp/fuel level gauges and turn lights/warning lights so I hope I can work around all the digital stuff..the connector itself has individual pins for the input of the above....the trick is to make them function right
does this match up with the fiero?:
For speedo and rev counter you will need to supply pulses at the appropriate
rate, pulse width, voltage and shape... 1 pulse per mph and 1 pulse per rev
