auto not shifting 1ggte/a340e no auto computer

[Stomps]

hey... does anybody know what wires go between the ECU and auto transmission computer? 1ggte/a340 combo..

my bro's gearbox refuses to shift out of 1st.. we recently put a 1ggte and auto into his cresta.. but didnt get the auto tranny computer to go with it..

the gear came out of an gx81... im guessing they run a separate auto box controller? can anyone confirm..

ma70's ran one..

could there be any other reason for it not shifting?


cheers..

Stomps

[Stomps]

or better yet..

can anyone detail how exactly these boxes shift..

what wires need to be connected to where?
i know its basic, but there is only one thing left to sort on my bro's x70 cresta..
auto gearbox not shifting.. which involves automatic gearboxes and wiring..both of which i know fuck all about..

so please.. any info will be appreciated..

Stomps

[CrUZida]

Not all Toyota's of that vintage have separate auto ecu's.
I'm fairly certain that the 7MGE Cressida runs an integrated ecu, where as the 7MGTE Supra runs separate ones.

But without the ecu, the box won't shift. - so it sounds like you need one (if it was integrated it would have expected it all to just work)
L will be 1st
2 will be Drive
and D will be Overdrive.
You will have no 2nd gear.

Have a look at the ECT wiring in the MA70 TSRM to get an idea of what needs to be wired.

[Stomps]

Ah ok.. It seems like it's integrated...

It feels like it needs a speed sensor wire connected.. Where does the speed sensor wire come from and plug into the ecu..

Stomps

[Z2TT]

I'm almost certain that all 1g-gte/A340E's had the box controlled by the ECU. Find the ECU Pinouts for the 1g-gte and work from there.

[RA35GT]

Ah ok.. It seems like it's integrated...

It feels like it needs a speed sensor wire connected.. Where does the speed sensor wire come from and plug into the ecu..

Stomps

Should be an output from the dash.

Also may be another one from the gearbox.

(it only needs one of those, I can't remember which one, but it may throw codes if the other is missing)

The diagram from here http://www.toymods.net/forums/showth...=1g-gte+pinout would suggest its integrated

[CrUZida]

Either one is needed.
The one from the gearbox SHOULD go through the engine loom, directly to the ecu, so assuming that is working, then the gearbox should shift.

How well is it wired?
Do the solenoids have 12V ?

[Stomps]

Um... Well it's wired ok I guess..

What input does it go to on the ecu? Spd 2?

I couldn't find a spd1 on the wiring diagram..

Dunno about 12v to solenoids.. ATM it's behaving like my auto did in the soarer when I cut the pink speed wire to the ecu.. Sorta hi stall like... It will free rev a bit if you hoof it, then finally smash into a gear at hi rpm..

I'm guessing speed signal missing..

Which wire is it off the box? Any idea

Stomps

cheers all btw

[Stomps]

Hey, little bit more info... Yous threw me a bit when you said wire from the dash.. It's an analog speedo so I don't think there is a wire from the dash.. Or is there.. It's an sx70 cresta..

The speedo works fine just from the cable going from the gearbox.. There was an output plug from the box with 2 wires coming out.. It was never connected coz there wasn't anything to plug it into..

Stomps

[big_zop]

What normally happens when there is a mechanical speedometer is that the speedo cable feeds the cluster and the the cluster then 'creates' a digital speed that is fed into the ecu. This is what the people above a referring to.

Due to it being part of the wiring from the cluster to the ECU, it may not be connected as i assume you are running the factory engine harness and have modified the vehicle looms to suit?

If you can tell me what month/year, i can have a look at the wiring diagrams for you.

[CrUZida]

If the sensor on the rear of the box isn't plugged in (note, this is NOT the speedo sensor, but a different one), AND the signal from the dash is not connected, it won't shift gears.

Fix one or the other and it will be fine.

[pandaah]

the 1ggte/a304e combo is integrated on the engine ecu... ive got one at home if that helps?.. yellow plug

[TTCorona]

I got my 1GGTE with an auto (No idea what model) It came with a seperate ECU for run the auto..
There was also a heap of extra wires in the loom i had to remove that went from the Main ECU to the Auto ECu and presumably to the actual auto itself...

I still have this seperate AUTO ECU, and a STD turbo Main ECU as well if you are interested....

[Stomps]

Hey, ahh cheers Big Zop.. I thought they meant there was a separate wire
running to the dash from the auto box..

Ok, judging by what rudi and cruzida have said about how the box should behave when not controlled by anything:

L= 1
2=D (3)
D= od

I'm confident that it is being controlled by something.. So the ECT must be integrated as there is no other box in sight.. So all we need to do is run the speed signal wire from either the dash or gearbox to get it sorted..

I'm not sure what model 1g it is.. I'll confirm a bit later..so can anyone confirm that this wire runs to SP2 or SPD2 or whatever it is?

Cheers again.. My bro is dying to get this car driving properly...

Stomps

[CrUZida]

That shift pattern is what happens when it has NO control (ie, the ect ecu is unplugged, no power, something like that).

When you have no speed wires I found that mine just hunted between gears a LOT, and was very hesistant to change into overdrive.

SPD is the wire from the dash to the ecu (it should be already behind the glovebox, L-W from *memory*)
SP2 is the sensor on the back of the gearbox.