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Location:
Adelaide, SA
Registered:
May 2002
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1G-GTE and GA61 tacho
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Wed, 29 September 2004 12:54
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Hi all,
I'm having no luck with getting my tacho to work with the new engine. Maybe i'm just not seeing it, but I cant for the life of me work out where to send the tacho signal! Not to mention my inability to work out where to get the signal from. I suppose the wire on one of the plugs might be it right?
And why would a 1G-GTE be hunting at idle speed, but running fine with any throttle?
Thanks
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Location:
Adelaide
Registered:
August 2004
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Re: 1G-GTE and GA61 tacho
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Wed, 29 September 2004 13:07
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Induction leak somewhere ?
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Location:
Adelaide, SA
Registered:
May 2002
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Re: 1G-GTE and GA61 tacho
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Wed, 29 September 2004 13:24
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I guess it could be, i'll know tommorow since i'm going to re-do the clamps.
Any more ideas?
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Location:
Perth
Registered:
August 2003
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Re: 1G-GTE and GA61 tacho
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Wed, 29 September 2004 17:01
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don't you need a "tacho-modulator" or something to translate the signal?
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Location:
Adelaide, SA
Registered:
May 2002
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Re: 1G-GTE and GA61 tacho
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Wed, 29 September 2004 21:14
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Do I?
My car had a 6 cylinder originally, and now it has another...
The coil was originally one of those oil filled ones with ignitor strapped on top of it, now it's a transformer coil, but surely it still sends out the same pulse?
I dunno, thats why i'm asking 
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Location:
Newcastle, NSW, Australia
Registered:
May 2002
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Re: 1G-GTE and GA61 tacho
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Wed, 29 September 2004 22:14
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I'd say you don't have the correct wire connected. The tacho signal from the 1GGTE is the same as the original engine. Check your wiring.
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Location:
Brisbane
Registered:
July 2002
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Re: 1G-GTE and GA61 tacho
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Wed, 29 September 2004 23:14
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you can get it straight out of the coil w/ ignitor from ur 1g.. one of the lines going to it
thats where i got it for my 1j
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Location:
Adelaide, SA
Registered:
May 2002
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Re: 1G-GTE and GA61 tacho
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Wed, 29 September 2004 23:33
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Thats what I was thinking actually
Thanks!
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Location:
Brisbane
Registered:
July 2002
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Re: 1G-GTE and GA61 tacho
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Thu, 30 September 2004 00:00
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yah, as far as all these people needing a tacho booster for the 1jz.. i dont see why they wasted the money
oh well
tell us if it works
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Location:
Adelaide, SA
Registered:
May 2002
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Re: 1G-GTE and GA61 tacho
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Thu, 30 September 2004 08:02
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Narp, no go!
Can a MA61 owner please check where the tacho signal wire is in the engine bay? Or tell me where it is? I just want to confirm before I go insane.
I tried hooking up a crappy aftermarket tacho (cheapo one) and it wouldnt read, i tried one of those tach/dwell things too and it was reading 6000rpm
This is getting annoying.
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Location:
Adelaide
Registered:
May 2002
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Re: 1G-GTE and GA61 tacho
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Thu, 30 September 2004 08:48
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there is a wire coming off the ecu plug that is a tacho signal wire output, Dave wired this to my autometer tacho.
all you need to find out is which wire on your tacho is the signal wire and connect it to the ecu tacho signal wire.
Brendon
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Location:
south east - melbourne
Registered:
March 2004
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Location:
Brisbane
Registered:
July 2002
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Re: 1G-GTE and GA61 tacho
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Thu, 30 September 2004 10:18
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| HyDrA wrote on Thu, 30 September 2004 18:02 |
Narp, no go!
Can a MA61 owner please check where the tacho signal wire is in the engine bay? Or tell me where it is? I just want to confirm before I go insane.
I tried hooking up a crappy aftermarket tacho (cheapo one) and it wouldnt read, i tried one of those tach/dwell things too and it was reading 6000rpm
This is getting annoying.
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all u need to do to check is get a test light.. hook the clip onto wire and run it against some metal and it will flicker and shit on tacho(if urs is dig)
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Location:
PNG
Registered:
June 2002
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Re: 1G-GTE and GA61 tacho
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Thu, 30 September 2004 10:20
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Gidday
If you have a look in Gallery on this site you will find the pin outs for the taco.
Craig
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Location:
Adelaide, SA
Registered:
May 2002
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Re: 1G-GTE and GA61 tacho
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Thu, 30 September 2004 15:51
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I'll play with it more tommorow...
I think the AFM is dodgy!! The ECU spat out an error code relating to the air intake temp sensor... i believe this is built into the AFM (cant see it been anywhere else )
Anyone got a spare good AFM they wanna lend me?
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Registered:
May 2002
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Re: 1G-GTE and GA61 tacho
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Fri, 01 October 2004 11:40
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I dunno if you've sorted this already but...
The tach would've taken signal from the -ve terminal on your old oil filled coil (I think, I don't have much experience with the MA61) this can either be attached to the tach signal that comes through the firewall (one of the pins on the 3 plugs that are next to the ECU plugs) or, from memory, the middle wire that enters the coil on the 1G coil. I had it hooked up like this before I realised there was a signal wire in the cabin. just test it first with a pin through the insulation.
if you want to test you have the right wire for your tacho, you could always rapidly hit it against an earth to get a signal? i dunno how the digi dash will like it though, ask someone else first...
Tim.
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Location:
Brisbane
Registered:
May 2002
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Re: 1G-GTE and GA61 tacho
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Fri, 01 October 2004 12:10
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Yeah what he said, the MA61 tacho expects an analog signal from the coil. Provided you have the correct wire hooked up the the correct terminal on the coil, it should work. You can't use the digital tacho signal from the ECU unless you use one of Grant's magical tacho boosters (which I'm using on the 2JZ).
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Location:
Adelaide, SA
Registered:
May 2002
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Re: 1G-GTE and GA61 tacho
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Fri, 01 October 2004 14:13
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I'm using an analogue instrument cluster.
I think i've got the right wire on the 1G-GTE coil (which is a transformer coil?), the black one?
I will get pics tommorow.
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Location:
Brisbane
Registered:
May 2002
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Re: 1G-GTE and GA61 tacho
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Sat, 02 October 2004 12:06
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Analogue intstrument cluster works the same as digital... they both expect an analog signal from an ignition coil.
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Registered:
May 2002
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Re: 1G-GTE and GA61 tacho
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Sun, 03 October 2004 04:08
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here, I found my coil, and my camera, both at the same time. Then I got confused, cause it seems I have striped 2 wires comming off the coil, some trial-and-error it seems. I can assure you one of these wires will give you the signal. I would assume the black one, seeings we're looking for a -ve signal, but I probably thought that in the first place then it may have been wrong, necessitating me stripping the blue wire to have another go.
Good luck.
Tim
[Updated on: Sun, 03 October 2004 04:10]
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Location:
Adelaide, SA
Registered:
May 2002
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Re: 1G-GTE and GA61 tacho
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Thu, 07 October 2004 05:31
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Ahh ok, thanks. So I take the signal directly from the coil instead of off the ignitor?
Taking it from the ignitor signal wire seems to not work.
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: 1G-GTE and GA61 tacho
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Thu, 07 October 2004 05:33
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Yeah, now hurry up and go outside and try it.
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: 1G-GTE and GA61 tacho
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Thu, 07 October 2004 05:57
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| HyDrA wrote on Thu, 07 October 2004 13:31 |
Ahh ok, thanks. So I take the signal directly from the coil instead of off the ignitor?
Taking it from the ignitor signal wire seems to not work.
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Ignitor signal should work.
Every other wiring diagram I've looked at has a tacho output built into the ignitor.
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Location:
Adelaide, SA
Registered:
May 2002
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Re: 1G-GTE and GA61 tacho
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Thu, 07 October 2004 06:28
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Should work, but didn't!
Both the blue and black wires on the coil caused the tacho to read RPM But only under a no-load situation. As soon as I started to rev the engine a bit, the tacho jumped around as if it wasnt getting enough signal.
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Registered:
May 2002
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Re: 1G-GTE and GA61 tacho
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Thu, 07 October 2004 15:26
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hmmmm...I can't remember if I actually drove the car with it hooked up like that...
Any reason you can't take the signal from the wiring harness??
(Don't you hate it when you go to look at some 1G wiring and realise you haven't installed acrobat reader so you have to find a cd with it on and....blahblahblah...) (then you reach for the closest commercially prouced cd's only to find out it's the only on in the WORLD that doesn't have it...)
here, try this
I think it's where I had mine hooked up when I was driving.
That reminds me of something funny, when I first wired it up, I had the coil powered from the dash electrics, so whenever the engine got over 4.5K the dash fuse would blow and kill the engine...
Tim.
PS sorry for my dribble back there, it's late and I'm up to my 8th Initial D ep straight. Good Luck.
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Location:
Adelaide, SA
Registered:
May 2002
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Re: 1G-GTE and GA61 tacho
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Thu, 07 October 2004 15:56
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That wire is a direct wire to the ignitor tacho signal wire, and the -IGN wire on the diag connector... tried it already, no go.
Funny thing - whenever I used the indicators the tacho would suddenly work, but only when the lights were on, whenever the flashed off, the tacho would go silly again...
I hate electrics.
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: 1G-GTE and GA61 tacho
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Thu, 07 October 2004 16:03
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| HyDrA wrote on Thu, 07 October 2004 23:56 |
Funny thing - whenever I used the indicators the tacho would suddenly work, but only when the lights were on, whenever the flashed off, the tacho would go silly again...
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Then check the earths.
I wouldn't be surprised if the tacho is earthing through the indicator circuit.
Does the tacho work fine with the parking lights on too?
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Location:
Adelaide, SA
Registered:
May 2002
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Re: 1G-GTE and GA61 tacho
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Thu, 07 October 2004 16:05
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Nope, I was testing it with the lights on 
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Registered:
May 2002
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Re: 1G-GTE and GA61 tacho
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Fri, 08 October 2004 00:21
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yeah, it's a electrical gremlin mate. Check the tacho wiring under the dash.
Tim.
(by the way I ended up watching the entire initial d season 2 last night...I just got hooked.)
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