Thursday, April 06, 2006 - 06:38 am, by: Chris Davey(Chris_davey)
Don't know pinouts. But get this wiring diagram and have a look. AFAIK it comes from the back of the gearbox (closer to the rear of car). Last paragraph.
How to install MV automatics manaulising shift box for Toyota A340e automatic
I have a jzx90 Chaser 1jz-gte and automatic in my car. It uses the whole Chaser loom and dash. Because of this I cannot simply chop the old wires off and connect them to the shift box instead. If I did this, I would lose my gear indicators on the dash.
Find plug A (which comes from the shifter, over the gearbox and to the passenger side) and get a shift light and test which wire is which. On my car it goes like this 1 Park green 2 Drive brown 3 Second peach 4 Low yellow 5 Power black 6 Nuetral pink
So that is the input side of the shifting sorted. Next is the output side.
The automatic gearbox shifts using 2 solenoids. Which gear is selected depends on which solenoids are receiving power. (http://www.cygnusx1.net/supra/library/TSRM/at/AT_012.html see table 2 for more information) These wires come from the tailshaft end of the gearbox and are black, white and yellow. You have to find plug “I” and cut the black and white wires. The black wire is Solenoid A and the white wire is solenoid B. These are not spliced in as we don’t want the stock ecu sending signals to these. These 2 wires are then plugged into the shift box as indicated in the instructions.
Finally, we must connect the power and ground to the shift box. The power should have a 10amp fuse on it and it should pass through the OD switch. This is because when the OD switch is switched on, it will cut power to the shift box and therefore the solenoids and when the solenoids are not powered, 4th gear is selected.
The other solenoid in the gearbox is used to control the lockup function. This is normally switched on when you are up to cruise speed and under light load. We can also wire this to a button so that we can manually activate it. This can cause damage to the gearbox under WOT so be careful. This effectively reduces the amount of energy wasted in the automatic and puts more power to the wheels. Just like fixing a slightly slipping clutch in a manual. To do this we can get the yellow wire from the “I” plug and run it to a button. This button should be a pop in pop out style not one that you have to hold down (Like the power button in my car). I recommend a button because if you forget to turn the lockup off the car will stall when you slow down. (Just like stopping in a manual without putting the clutch in).
Thursday, April 06, 2006 - 04:13 pm, by: Chris Davey(Chris_davey)
Thanks mate
That is something I have yet to change actually. I will have to do it. When I wired the positive wire to the shift box through the o/d switch it blew a fuse. (don’t know which one but dash didn’t work) So in the end I used the negative to the shift box and sent that through the o/d switch.
After installing it, you have to be careful when testing to make sure that it is selecting the right gears. If there is no power to the shift box for the whole time it will shift 1-3-4 and o/d won’t do anything when you turn it on. This can fry the box if you are hammering it so have to be careful testing.
Thursday, April 06, 2006 - 04:43 pm, by: Ronny Jeremy(Ronnie)
My negative is also going through my OD switch, But I had a problem with 4th gear and it ending up being left over voltage and wouldn’t select for 5 seconds or not at all.
Solenoids run on 12v, but they also continue working with only 1 volt, once the relay was connected, she instantaneously shifted hard and fast
Thursday, April 06, 2006 - 04:53 pm, by: Chris Davey(Chris_davey)
so you have a relay on your negative wire going through OD switch then?
I haven't fully tested mine yet as I installed it and then attempted to wire the wolf 3d properly. Didn't work. Bought microtech and have been waiting for it to arrive ever since.
How much was the unit? Im looking at going a power FC or something similar. Does controll the auto like its standard and shift up and down gears automatically?