1J swap Tach not working

[A32Boost]

Just Recently Completed my swap but now my Tach dosent work i followed the swap guide and nothing

Specs:
I have a Early MA70 which Originally was auto
I swapped in a JZA70 1J, harness and ECU and i converted to 5spd

 

[87supraguy]

i replied to your thread about this on Supraforums... basically you need a Turbo guage cluster for the tach to work with the 1j

 

[A32Boost]

i replied to your thread about this on Supraforums... basically you need a Turbo guage cluster for the tach to work with the 1j

i have a turbo gauge cluster, my car was originally a 7mgte auto

 

[S.A. supra]

I'm having the same problem here. I swap my 1j from a 90 n/a in which the tach worked into a 89 turbo. the tach on the turbo worked before the swap also, but after the swap it doesn't work. I have to double check the wiring. What wiring diagram did you use?

 

[A32Boost]

I'm having the same problem here. I swap my 1j from a 90 n/a in which the tach worked into a 89 turbo. the tach on the turbo worked before the swap also, but after the swap it doesn't work. I have to double check the wiring. What wiring diagram did you use?

I used the diagram from the 1jz swap bible avail from sf, it said wire in the black wire from th jza harness to the black wire on the m1 connector on the ma70 harness, I forget the pin numbers , cause iam at work at the moment

 

[1wickedA70]

i replied to your thread about this on Supraforums... basically you need a Turbo guage cluster for the tach to work with the 1j

please dont post false information. you dont need a turbo gauge cluster for the 1j tach to work. any cluster from any year mk3 will work..make sure ur getting a tach signal from your harness

 

[S.A. supra]

I think think we used the same one
http://web.archive.org/web/20051216123950/www.1jz-gte.us/documents/SubDocs4/IG1(87-89).pdf

Does you oil pressure gauge work? My oil pressure gauge and my tach don't work. I still have to trace the wiring out and double check. But I'm just wondering if you had to do anything special to get your oil pressure gauge to work.

 

[1wickedA70]

i think the tach wire is the black and red wire in one of the ignitor plugs, your oil pressure will not work unless you get the adaptor from driftmotion to use the stock sensor.

http://store.driftmotion.com/static/i-1jzoilpressuresenderadapterhose.php

buy that, unscrew the stock 1jz oil pressure sensor from behind the AC compressor, screw one end of the adaptor from driftmotion where the stock 1jz sensor used to be. then screw the stock 7m oil sensor to the other end of the adaptor. after that you have to splice the oil pressure sensor wire, and wrap it around the stock 7m oil pressure sensor. forgot which wire exactly, but after that it should work..

 

[S.A. supra]

i think the tach wire is the black and red wire in one of the ignitor plugs, your oil pressure will not work unless you get the adaptor from driftmotion to use the stock sensor.

http://store.driftmotion.com/static/i-1jzoilpressuresenderadapterhose.php

buy that, unscrew the stock 1jz oil pressure sensor from behind the AC compressor, screw one end of the adaptor from driftmotion where the stock 1jz sensor used to be. then screw the stock 7m oil sensor to the other end of the adaptor. after that you have to splice the oil pressure sensor wire, and wrap it around the stock 7m oil pressure sensor. forgot which wire exactly, but after that it should work..

Sweet thanks for the info.

 

[f00g00]

My NA cluster didn't work so I needed the turbo cluster from my swap car on the failed 7MGTE swap (cracked block). I also took the old boost guage out and installed my batt indicator from the NA cluster and wired it in.

 

[OneJArpus]

From my understanding, a turbo tach is needed to work with out doing anything to the tach that is IF all the other wiring that was done was done properly. NA tachs IIRC need a lil wiring to work

 

[f00g00]

I used the 7MGTE tach in my NA cluster and it didn't work. I installed the turbo cluster in with the GTE tach and it did. I didn't try the resistor mod which is explained here.
http://www.4cefed.com/tech/natachchanges.jpg

 

[87supraguy]

i wouldn't consider it false information, it was information i recieved that worked for a few others all they did was switch their n/a cluster for a turbo cluster and their tach worked again... i asked for this information because i'm going through the same is issue only difference is my car originally was N/A... this is the route i'm going, instead of doing extra wiring work or resistor work... either way my suggestion isn't helping you... sorry about buddy

 

[Dr Tweak]

The n/a tach will not work with the 2JZ or 1JZ tach signal without modification. Most people use either a 7MGTE tach, a 1JZ (JZA70) tach, or a tach adapter like this one: http://www.phoenixtuning.com/zenstore/index.php?main_page=product_info&cPath=3_4&products_id=4

If you have a turbo tach and it still isn't working, then you need to check the wiring. Good luck

-Doc

 

[87supraguy]

sooo i wasn't Wrong! that's good to know i will be able to get my cluster working again.

 

[Dylan JZ]

mine worked when I first got my car, but then it stopped.. I checked the wiring and tried a few other tachs (even a 1GGTE tach), and none of them worked. I've since taken it out completely and gone aftermarket.

 

[A32Boost]

i tripple checked my wiring on the swap guide it says that the black wire is the tach signal from the m1 connector right?

 

[luckyMK3]

I am having the exact same problem as you "A32Boost", I know my wiring is correct. I hook up my multimeter to the tach signal and set it to ohms I can then see that I am getting something from the tach signal. On my multimeter I see a small graft climb up and back down with the RPM's of the engine, so I know I am getting a signal from the ignitor. My car was an original N/A so I change out the resistors on the back of the tack according to this web site http://www.autosoftsys.com/supra/tachcompare/ No luck though it did not work, so then I bought a tach from a left hand drive JZA70 thinking this would fix my problem........no luck, it did not work. I must be doing something wrong, all though when I hooked up a apexi neo to my stock ecu the tach on that display works perfectly. So maybe I can use the same signal that the apexi piggyback is using to get my tach to work. I will give this a shot and let you know my findings. This is driving me crazy :aigo: I have been driving my 1jz supra for over year now with no tach. Please advise.

 

[Dylan JZ]

I am having the exact same problem as you "A32Boost", I know my wiring is correct. I hook up my multimeter to the tach signal and set it to ohms I can then see that I am getting something from the tach signal. On my multimeter I see a small graft climb up and back down with the RPM's of the engine, so I know I am getting a signal from the ignitor. My car was an original N/A so I change out the resistors on the back of the tack according to this web site http://www.autosoftsys.com/supra/tachcompare/ No luck though it did not work, so then I bought a tach from a left hand drive JZA70 thinking this would fix my problem........no luck, it did not work. I must be doing something wrong, all though when I hooked up a apexi neo to my stock ecu the tach on that display works perfectly. So maybe I can use the same signal that the apexi piggyback is using to get my tach to work. I will give this a shot and let you know my findings. This is driving me crazy :aigo: I have been driving my 1jz supra for over year now with no tach. Please advise.

your symptoms are the same ones I had.. the stock tach will not operate from the same signal the AFC uses, I tried to no avail and eventually went aftermarket.

the aftermarket tach uses the same signal as the AFC though..

 

[A32Boost]

i really dont want to get a after market tack