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Soul
Newbie


Joined: 26 Oct 2016
Posts: 3



PostPosted: Wed Nov 02, 2016 12:45 pm    Post subject: Reversing lights stuck on Reply with quote

Hi folks
I currently have the reversing lights, camera and mirror dipping function stuck on.
Looking through forums etc I have no clear answer.
It's a tiptronic and I think the switch that operated these functions must be under the selector lever.
More worrying is a post about an ecu fault.
I have had the car just over a week so am pretty new to this.
It's a 4.5 turbo 2003.
Access to a wiring diagram for this part of the circuit would be good if anyone as this please?
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Demort
Paul Ricard


Joined: 21 Mar 2015
Posts: 3250
Location: Sussex


PostPosted: Wed Nov 02, 2016 9:48 pm    Post subject: Reply with quote

Its probably going to be the muti function switch on the gearbox thats faulty , i think this is really a garage job as you need a tester on the car for fault codes and to look at actual values of the switch as gears are selected.

Theres nothing i can think of to help you diagnose without equipment im afraid .
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Soul
Newbie


Joined: 26 Oct 2016
Posts: 3



PostPosted: Thu Nov 03, 2016 11:00 am    Post subject: Reply with quote

Demort wrote:
Its probably going to be the muti function switch on the gearbox thats faulty , i think this is really a garage job as you need a tester on the car for fault codes and to look at actual values of the switch as gears are selected.

Theres nothing i can think of to help you diagnose without equipment im afraid .


Thanks for the idea.
I have just been reading about the switch and although it feeds the reverse lights it also feeds the Transmission TCM which I would expect to not be happy to let me drive normally. I assume this input lets the TCM know it's in reverse and to select Reverse on the Gearbox.
I tried removing the fuse for the lights last night (No55) R/H fuse box according to the manual but this didn't work and the suspension warning came on, on the dash.
I need better light so will wait for the weekend now to do more detailed work.
The foil fuse box layout on the panel is not helpful with a torch. Just reflects the light and you still can't read it.
I have now got a flat battery also which I planned on changing anyway (it was sluggish starting and I can't see where in the history it was changed).
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Soul
Newbie


Joined: 26 Oct 2016
Posts: 3



PostPosted: Fri Dec 16, 2016 8:33 pm    Post subject: Reply with quote

The issue of reversing lights stuck on increased to
Bonnet open
Steering wheel moving on it's own
Seat moving on it's own
Hazards turning on
Anyway had a good look at just about all ecus I could find but could see no signs of water anywhere
I read the gateway ecu behind the steering wheel side of the dash connects all systems
One post said they had corroded connections on this from a burst rear washer pipe. This is what it turned out to be although the pipe had been replaced previously.
I have had to take it to a garage for repair and they are putting a second hand ecu in plus because Porsche will not sell the connector on it's own but as a full wiring loom they are soldering a secondhand connected in.
The ecu is the black one with connections top and bottom for info.
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