Auto Troubles :-(
Auto Troubles :-(
OK so heres the run down of the car
1985 Brumby
G1S1 Liberty EJ22 Motor and Matching ECU and Loom
2000 GTB Auto Box with matching TCU and Loom
4" lift and 30" tyres
i have only just put the auto in and struggling to get it going properly
currently it takes off in first, but as soon as you try to accelerate or go any faster than about 10kmh it changes up to 2nd and struggles
the tiptronic + and - dont seem to make any difference either
once your up and running, it will kick back a gear when you boot it (not back to 1st tho) and it also seems to want to change up a gear well before it needs to
if anyone has suggestions of anything i can test, or try, or any info on how the box works in general it would be much appreciated!
cheers
Johnny
1985 Brumby
G1S1 Liberty EJ22 Motor and Matching ECU and Loom
2000 GTB Auto Box with matching TCU and Loom
4" lift and 30" tyres
i have only just put the auto in and struggling to get it going properly
currently it takes off in first, but as soon as you try to accelerate or go any faster than about 10kmh it changes up to 2nd and struggles
the tiptronic + and - dont seem to make any difference either
once your up and running, it will kick back a gear when you boot it (not back to 1st tho) and it also seems to want to change up a gear well before it needs to
if anyone has suggestions of anything i can test, or try, or any info on how the box works in general it would be much appreciated!
cheers
Johnny
- vincentvega
- Senior Member
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- Location: Brisvegas
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you have taken on quite a challenge there mate!
If you had stuck with an early auto (< 99) i could help you out greatly with this, but the later stuff is foreign to me.
I would be starting with the wiring diagram for the GTB auto. look at all the connections between the TCU and box and make sure they are all present. Then look at any interconnections between the TCU and the ECU.. thats where you are going to struggle.
What have you done for speedo inputs into the TCU? Does the GTB box have an electronic speedo drive for the dash?
If you had stuck with an early auto (< 99) i could help you out greatly with this, but the later stuff is foreign to me.
I would be starting with the wiring diagram for the GTB auto. look at all the connections between the TCU and box and make sure they are all present. Then look at any interconnections between the TCU and the ECU.. thats where you are going to struggle.
What have you done for speedo inputs into the TCU? Does the GTB box have an electronic speedo drive for the dash?
brumbyrunner wrote:And just to clarify the real 4WD thing, Subarus are an unreal 4WD.
all the box > TCU wiring is untouched
i have connected up a few sensors and power and earths as well
there are 2 speed sensors inside the box and one on the TC turbine thingy
im assuming there is a fron and rear half of the box speed sensors to control the VTD Centre Diff
the wiring diagrams i have are pretty helpfull but theres 5 or 6 wires the go between the TCU and ECU and thats all i can find out abuot them...
i have not connected up any of the steering wheel shift buttons or any of the dash lights etc (i wouldnt have thought they would stop the box from working)
i can post up relevent diagrams if you want to have a look see
i have connected up a few sensors and power and earths as well
there are 2 speed sensors inside the box and one on the TC turbine thingy
im assuming there is a fron and rear half of the box speed sensors to control the VTD Centre Diff
the wiring diagrams i have are pretty helpfull but theres 5 or 6 wires the go between the TCU and ECU and thats all i can find out abuot them...
i have not connected up any of the steering wheel shift buttons or any of the dash lights etc (i wouldnt have thought they would stop the box from working)
i can post up relevent diagrams if you want to have a look see
- vincentvega
- Senior Member
- Posts: 2446
- Joined: Tue Oct 04, 2005 10:00 am
- Location: Brisvegas
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mate you need to find a service manual that shows what the wires between the TCU and ECU are.
Also what polarity is the throttle sensor in a 2000 GTB? My guess would be opposite to a Gen1... so you might need to invert the signal.
Also what polarity is the throttle sensor in a 2000 GTB? My guess would be opposite to a Gen1... so you might need to invert the signal.
brumbyrunner wrote:And just to clarify the real 4WD thing, Subarus are an unreal 4WD.
so far ive found 3 manuals that have those wires on them. the auto trans section says it goes to the ECU and to refer to the ECU Section, and the ECU section says refer to Auto Trans section... grrr
i just found some troubleshooting things that work off the power light, so ill wire one of those in and see what i can find
I know what input the TPS needs for the TCU and wired it up to suit
also going to try my local subaru service place, and see if i can find a workshop manual for anything with a tiptronic auto
i just found some troubleshooting things that work off the power light, so ill wire one of those in and see what i can find
I know what input the TPS needs for the TCU and wired it up to suit
also going to try my local subaru service place, and see if i can find a workshop manual for anything with a tiptronic auto
Just a random suggestion but you wouldn't be stuck in a get home mode or any thing stupid would it?
87 targa brumby (Neglected),
92 targa brumby (weekend runabout),
97 Lifted Outback (Dailey drive),
05 outback safety (Too cheap to pass up),
90 model liberty (was to be scrapped instead sold to workmate)
+ others.
92 targa brumby (weekend runabout),
97 Lifted Outback (Dailey drive),
05 outback safety (Too cheap to pass up),
90 model liberty (was to be scrapped instead sold to workmate)
+ others.
- Gannon
- Senior Member
- Posts: 4580
- Joined: Sat Nov 05, 2005 10:00 am
- Location: Bowraville, Mid Nth Coast, NSW
2 of the wires that run directly between the TCU and ECU are the "torque signal" which makes the ECU retard the ignition timing while its changing gear. It to reduce shift shock.
But i doubt thats your issue
Are you using the tiptronic shifter?
It has a microswitch to differentiate between normal and sportshift when you push the lever sideways into the sportshift position. This isnt stuck on is it?
But i doubt thats your issue
Are you using the tiptronic shifter?
It has a microswitch to differentiate between normal and sportshift when you push the lever sideways into the sportshift position. This isnt stuck on is it?
Current rides: 2016 Mitsubishi Triton GLS & 2004 Forester X
Ongoing Project/Toy: 1987 RX Turbo EA82T, Speeduino ECU, Coil-pack ignition, 440cc Injectors, KONI adjustale front struts, Hybrid L Series/ Liberty AWD 5sp
Past rides: 92 L series turbo converted wagon, 83 Leone GL Sedan, 2004 Liberty GT Sedan & 2001 Outback
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Ongoing Project/Toy: 1987 RX Turbo EA82T, Speeduino ECU, Coil-pack ignition, 440cc Injectors, KONI adjustale front struts, Hybrid L Series/ Liberty AWD 5sp
Past rides: 92 L series turbo converted wagon, 83 Leone GL Sedan, 2004 Liberty GT Sedan & 2001 Outback
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- vincentvega
- Senior Member
- Posts: 2446
- Joined: Tue Oct 04, 2005 10:00 am
- Location: Brisvegas
- Contact:
torque cut wont be causing this problem. my TCU is missing its torque cut signal and it shifts fine.
as I said earlier mate you need to tick off 1 by 1 every connection into the TCU until you come across the cause of this.
you never did really answer the question of TPS polarity. the ECU will require a 5-0v signal because thats the way Gen1 worked.
Gen 2 on have 0-5v tps signal so I assume your GTB TCU would be expecting this.
I would look at the TPS voltages at the TCU and ECU andcheck they are correct... if the GTB TCU does need the 0-5v signal you will need a circuit to invert it.
as I said earlier mate you need to tick off 1 by 1 every connection into the TCU until you come across the cause of this.
you never did really answer the question of TPS polarity. the ECU will require a 5-0v signal because thats the way Gen1 worked.
Gen 2 on have 0-5v tps signal so I assume your GTB TCU would be expecting this.
I would look at the TPS voltages at the TCU and ECU andcheck they are correct... if the GTB TCU does need the 0-5v signal you will need a circuit to invert it.
brumbyrunner wrote:And just to clarify the real 4WD thing, Subarus are an unreal 4WD.