np89 Posted February 21, 2015 Share Posted February 21, 2015 Hey Guys, Trying to help out a new member "Ashloys" who bought a Mkiv 93" RZ TT Auto recently. The car was bought with the flashing O/D Off & Slip Cont Lights flashing and when the fault code was read it was 89, which is an Autobox Fault. I have removed and reinstalled the unbranded speedo converter, although is colour coded the same as a thor one, made no difference, TRAC Fuse is fine, Wiggled the main ecu loom, car actually cut out but didnt solve the issue or make any difference to it, Tried the odo plug mod joining the pink wire to the blue/red wire, made no difference. Anyone any ideas or managed to solve this problem? Thanks in advance Niall Quote Link to comment Share on other sites More sharing options...
np89 Posted February 21, 2015 Author Share Posted February 21, 2015 Just re-set the sub throttle position sensor there (if it was the right one), Reset the ECU and started the car, thought i had nearly got it but the same problem still persists. Quote Link to comment Share on other sites More sharing options...
ashloys Posted February 22, 2015 Share Posted February 22, 2015 Was literally just about to start a thread here. Glad you did, as you've described/worded everything better than I would have. lol Cheers. Quote Link to comment Share on other sites More sharing options...
np89 Posted February 22, 2015 Author Share Posted February 22, 2015 Thought id update you all on the code 89 issue with his car. Ive completely removed the unbranded speedo converter/delimiter and returned all the wiring to standard. Checked the sub throttle position sensor and reset it. Found a missing bulb in the clocks for the green slip cont light, replaced it. He is mossing the main beam bulb but cant see that being it. The pin 2 vehicle speed sensor seems loose in the ecu and at some point someone has replaced the speed sognal wire to the odo with another one and the pin clip seems loose in it but i cant find anything else wrong with it. The bulb in the slip cont button doesn't work but i dont think its connected. Does anyone have any ideas? I dont really have much more time to look at it for him Quote Link to comment Share on other sites More sharing options...
np89 Posted February 22, 2015 Author Share Posted February 22, 2015 Any suggestions? Chris Wilson looking in your direction Quote Link to comment Share on other sites More sharing options...
inazone Posted February 25, 2015 Share Posted February 25, 2015 Check cable to the tps, I had a similar issue. When I had my Clifford alarm installed, the installer initially tapped into this wiring for the auto start, however changed his mind. Overtime the cable broke and I had an intermittent fault. Fixed it by splicing a new piece of wire in. Never had a problem since. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted February 25, 2015 Share Posted February 25, 2015 Concentrate your search around the TPS and the throttle motor, their wiring, set up and freedom of movement of the motor and check for a worn or noisy carbon track on the TPS. Quote Link to comment Share on other sites More sharing options...
np89 Posted February 27, 2015 Author Share Posted February 27, 2015 Just to update people on this for future ref, I turned the car over to the guys at SSI as I was out of time to look at it again myself. Turned out it was the Trac ECU itself, which was replaced - I personally feel I would have not figured this out except as a last resort so +1 for Colin at SSI. I am also old the "buffer mod" was carried out but I have no idea what this is? Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted February 27, 2015 Share Posted February 27, 2015 "Buffer mod"? Never heard of that... As for your diff mount enquiry, I would only ever suggest people fit solid monts to all 4 corners of the diff, just fitting 2 will make the solid ones do all the work and may result in casting failure. they do make the diff transmit more noise. A lot more noise if it's a whiner or droner. Quote Link to comment Share on other sites More sharing options...
np89 Posted February 27, 2015 Author Share Posted February 27, 2015 A search suggests its something to do with a fault in the Odo itself in the "buffer" circuit i.e dry solder joins etc. Yea I Think I am just going to solid bush the 4 corners of the subframe and the diff, as poly mounts are not available consistently for all of the subframe or all of the diff Quote Link to comment Share on other sites More sharing options...
Supraleeturbo Posted February 27, 2015 Share Posted February 27, 2015 This happens when the odo is unplugged and the car is started meaning someone down the line has been driving with it unplugged so the mileage won't be right either Quote Link to comment Share on other sites More sharing options...
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