Ianswebb Posted February 7, 2021 Share Posted February 7, 2021 Hello everyone, I have an issue I hope you can聽help with.. As the title states I have an intermittent starting issue with my 2007 A4 CVT. Seemingly, without rhyme or reason when turning the key, all the聽dash lights come on as expected but when I go one step further and try to start the car there is nothing, no dimming of lights, no starter solenoid聽clicking, nothing!聽 Yet I'll try another time and it will start bang on cue. The battery is good and the grounds are good. I'm getting voltage to the starter motor, although I am yet to test the switch wire. I don't have any fault codes as yet, namely because i'm only running VCDS lite聽馃槵聽and can't access all the modules. There is one thing I've noticed when it is playing up.. When all the聽dash lights are on, the 'Automatic Selector Lever Lock' (between P and R)聽light does not come on and the selector can be moved without pressing the brake pedal, ordinarily light would be on and pressing the brake pedal releases the lock.聽聽 This points me in the direction of the brake light switch, although the brake lights appear to work fine. Anyone got any advances on this theory? Ian聽聽聽聽 Quote Link to comment Share on other sites More sharing options...
Magnet Posted February 7, 2021 Share Posted February 7, 2021 Hello Ian, I too would go with your theory, and couple it with checking the Park switch -as starting points (pardon the pun). Kind regards,聽 Gareth.聽 Quote Link to comment Share on other sites More sharing options...
Ianswebb Posted February 7, 2021 Author Share Posted February 7, 2021 Hi Gareth, All puns gratefully received. Laugh of you cry, right!?..聽and thanks for mucking in!聽I'll give TPS a shout聽tomorrow. The brake switch I've just taken out聽is a genuine part although聽I'm going to hazard a guess and say its not a factory original. It doesn't seem dusty enough to me, although there some slight rubbing marks on top, so who knows聽馃. None the less for that I think I'll go聽for the same again.聽 Regarding the Park Switch.. is that the same as a neutral safety switch? (Apologies if that is a really daft question, I'm new to the world of automatic gearboxes). To date, I haven't had any key release issues. Ian Quote Link to comment Share on other sites More sharing options...
Ianswebb Posted February 11, 2021 Author Share Posted February 11, 2021 Got a bit of an update.. First off TPS don't sell to regular members of the public! I'm sure I walked in to one of their branches years ago and bought some stuff, but perhaps聽I didn't. Oh well!.. Got a new brake light switch from the dealer, and was pleasantly surprised that it only cost 拢17. Unfortunately, it didn't work. I have however unearthed a fault code from聽the 'Instruments' module... 01315 - Transmission Control Module 004 - No signal/Communication聽聽 The control module part number is 8E0 920 982 N Would anyone happen to know where this bad boys is located? I'd like to make sure all the connections are clean from there back to the TCM so I can聽start ruling everything out,聽in a vain attempt to avoid聽sliding聽down the slippery slope that is TCM repair/replacement (dealer quoted 拢1327inc vat(part only)聽and said that it would need coding aswell 馃ぎ). 聽 Ian Quote Link to comment Share on other sites More sharing options...
Ianswebb Posted February 14, 2021 Author Share Posted February 14, 2021 May well have found my issue.. Way聽dodgy connection on fuse 31! Specifically the right connector. Not too sure how easy that is going to be to replace..聽I'm going to hazard a guess and say it's gonna be a ball ache聽馃槧. None the less for that, I've wedged the fuse in for now so there is good contact, while I decide how best to tackle it. Ian Quote Link to comment Share on other sites More sharing options...
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