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Dead Zf?


MeatWod

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  • Member For: 17y 7m 6d
  • Gender: Male
  • Location: Baldivis

Hi guys I think my ZF may have died :( well the TCM at least... I pulled the car out of the garage to work on my carputer (located in the passenger foot well behind the kick panels) I then went to start it an hour or two later and it wont turn over!

it's nothing battery related. It's missing the earth at the starter relay after checking the schematics the earth comes from the transmission loom into the PCM then out of the PCM to the relay, I can chase the earth going into the PCM but it doesn't come out :(.

If you manually earth the relay the car will start and idle fine. There is no fault codes, and the gear selection on the dash cluster is blank.. so I'm guessing the TCM isn't sending the right signal to the PCM to say hi im working send the earth through to the relay.

I've checked all the looms down in the passenger footwell reseated them all, the manual told me the transmission earths (pin 13 & 16 from memory) are earthed there but I couldn't find them for the life of me... did find them in the engine back in a loom that sits right next to the pcm & in to the actual PCM it's self so I don't think it's an earth issue, but more likely it isn't sending a CAN or w/e it uses type signal to the PCM

if you do start the car by bypassing that earth its in serious limp mode(not that there is any lights or anything on the dash & my OBDII adapter doesn't pick up any faults) it just basically has no drive at all will SLOWLY creep forward and you cant rev over 2k. Gear selections are REALLY rough as well through P,R,D etc

Any ideas :( probably going to have to end up towing it to fraud. Has anyone had a TCM fail and what were the symptoms??

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  • ʎǝʞuoɯ ɹoıuǝs
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  • Member For: 16y 6d
  • Gender: Male

Ford would be the last place I'd take it IMHO. you go there with a problem saying since working on the carputer the tranny module has packed it in, oh and also mention that its got 360rwkw.

surely you could ring a few tranny places/tuners for some help.

what state are you in?

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  • Here since the start...
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  • Member For: 21y 7m 27d
  • Gender: Male
  • Location: Victoria

I doubt many would know as much as a dealer.

Not all dealers are the same though. My dealership has an excellent understanding of the cars and will happily work on modified cars.

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  • Member For: 17y 7m 6d
  • Gender: Male
  • Location: Baldivis

Well yeah I assume I've managed to disconnect something, I didn't go near the gear selector thou id done all that work ages ago with the ICC etc, only went in behind the passenger kick panel, where there is 2 or 3 loom connectors Im sort of guessing there is a loose wire in one of them but itd take me about 4yrs to find it.. if that's even the problem!

Like I said the transmission earths are supposed to be in that area but im pretty confident they aren't there I had a pretty thorough look and I can trace them to the PCM anyway so I don't think I've damaged that...

My main concern is if maybe I had unseated the loom connector then tried to start it and its arc'd out and actually fried something?? I dunno ill have another play next time im home there isnt many wires coming out of the tranny. If you fully disconnect the transmission loom it doesn't even change a thing...

I think ill pull the loom off the old ladys zf and see what symptoms she gets, hers is a FG thou... That should be fairly safe to do no?

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