Outback VTD project 2017 - Subaru Outback - Subaru Outback Forums
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post #1 of 7 (permalink) Old 01-11-2017, 04:34 PM Thread Starter
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Join Date: Oct 2015
Location: Montreal, Canada
Car: 2001 Outback H6 canadian edition with JDM Lancaster VTD 4EAT
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Wink Outback VTD project 2017

My new project is the conversion of my Outback to a full VTD car

I already have on my H6 a JDM VTD transmission since my swap in June 2016
My car came originally with a MPT transmission and still has a MPT computer
Currently I'm running the car as a daily driver with the FWD fuse in
This prevents the computer to send pulses to the AWD solenoid
On a stock MPT transmission the car would be FWD but since I have a VTD one the car is AWD full time
Except that there's zero control on the transmission for the torque distribution, the transmission is acting like with a central open differential because I don't have a VTD compatible computer

all the VTD computers have 3 connectors B54, 55 and 56 but none-VTD cars are fitted with a harness and computer made with 2 connectors also called B54 and 55 but incompatible

swapping a computer = redoing the whole harness , cramped under the car , wire by wire .... no way there's like 40 of them

my solution !
First I bought a transmission computer from a plain 2001 Legacy , with the 2 connectors system, I opened the computer and desoldered the whole thing
I also took from a Outback VDC the 3 connectors using a big cutter
on Ebay I bought a WRX 2002 transmission computer, that car had a full VTD system and no VDC

first step was doing a whole mapping of the signals , 2 versus 3 connectors, not a single wire is going to the same pin number
second step was soldering a wire on every pin on the connector removed from the Legacy computer







next step later this week , merging the connectors from the VDC harness to my new wires

more to come

Brucey, Numbchux, GrogD and 1 others like this.

2001 Canadian Outback H6, same interior as a VDC without the VDC, now riding on a JDM Lancaster VTD transmission

1999 Dodge Avenger aka Black Beauty, my summer beast
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post #2 of 7 (permalink) Old 01-11-2017, 06:17 PM
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Location: DFW TX
Car: '01 OBW 3.0 VDC 159,000 Miles
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whoah. I'll stick with wrenches. *VERY IMPRESSED*

bob.oconnor.5030 likes this.

I give advice for free, you get what you pay for.
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post #3 of 7 (permalink) Old 01-12-2017, 05:06 PM Thread Starter
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Car: 2001 Outback H6 canadian edition with JDM Lancaster VTD 4EAT
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map of the wires
first line is always 2 connectors TCM B54 and B55
second line is 3 connectors TCM B54, B55 and B56 position of the same signal
and annotations if the WRX is different than the Outback

“1” range switch B54 1
b55 7
Torque control cut signal B54 2
b55 10
AT OIL TEMP” warning light B54 3
b56 10 signal out to a bulb
wrx b56 11 led pull to ground
AT diagnosis signal (Waveform) B54 4
b56 21
2-4 brake timing solenoid B54 5
b54 16
Shift solenoid 1 B54 7
b54 22
2-4 brake duty solenoid B54 8
b54 18
Line pressure duty solenoid B54 9
b54 9
“2” range switch B54 10
b55 6
Cruise set signal B54 11
b55 22
FWD indicator light B54 12
none
Torque control signal 1 B54 13
b56 5
Low clutch timing solenoid B54 14
b54 15
Transfer duty solenoid B54 15
b54 6
Lock-up duty solenoid B54 16
b54 7
2-4 brake dropping resistor B54 17
non
Line pressure dropping resistor B54 18
non
ABS signal B54 19
b55 21
Torque control signal 2 B54 21
b56 14
Ignition power supply B54 23
b54 23
Ignition power supply B54 24
b54 24
Throttle position sensor power supply B55 1
b54 2
Throttle position sensor B55 2
b54 3
Rear vehicle speed sensor B55 3
b55 24
Engine speed signal B55 4
b55 17
Front vehicle speed sensor B55 5
b55 18
Back-up power supply B55 6
b56 1
Data link signal (Subaru Select Monitor) B55 7
b56 15
“D” range switch B55 8
b55 4
System ground line B55 9
b56 19
b54 21
Sensor ground line 1 B55 10
b54 10
b54 21
b54 20
b55 9
ATF temperature sensor B55 11
b54 11
Torque converter turbine speed sensor B55 12
b55 8
Vehicle speed output signal B55 13
b56 17
FWD switch B55 14
none (possible b55 20 ?)
“R” range switch B55 17
b55 3
“3” range switch B55 18
b55 5
Intake manifold pressure signal B55 20
b54 1
Sensor ground line 2 B55 21
b55 9
“N” range switch B55 22
b55 14
“P” range switch B55 23
b55 1
Brake switch B55 24
b55 12
extra
vdc +
b56 9
vdc -
b56 18
power mode indicator
b56 11
power mode switch
b55 23
snow hold
b55 16
kick down switch
b55 11
Numbchux, GrogD and Bgilly like this.

2001 Canadian Outback H6, same interior as a VDC without the VDC, now riding on a JDM Lancaster VTD transmission

1999 Dodge Avenger aka Black Beauty, my summer beast
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post #4 of 7 (permalink) Old 01-15-2017, 05:34 PM Thread Starter
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2/3 done




I found something weird when I started the third row
the VDC harness have no wire at the ABS signal input

2001 Canadian Outback H6, same interior as a VDC without the VDC, now riding on a JDM Lancaster VTD transmission

1999 Dodge Avenger aka Black Beauty, my summer beast
AlainB is online now  
post #5 of 7 (permalink) Old 01-15-2017, 05:49 PM
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Very cool! Instead of having the computer control the VTD, why not put in a manual VTD controller? My understanding is that the VTD transfer system, multiplate clutch, and gearset is extremely similar to the STI's DCCD system. A lot of folks on the WRX forums (since they have VTD in the 4eats as well) have posted about trying to make a manual VTD controller and at this point, there might be some aftermarket ones out there that allow you use the STi's DCCD switches for manual control, or have the aftermarket computer control automatically.

2001 Outback H6 VDC Wagon - 297k mi and counting
Mods: Mainly maintenance plus stainless braided brake lines, Hawk HPS, CAI, HIR high beams, additional trans cooler, 17mm rear sway bar

2002 Outback 2.5 4EAT base model - 174k mi and NOT counting
Mods: Super blown tranny

2003 BMW 540i 6-sp M Sport
Mods: Setrab oil cooler, M60 manifold swap, Eibach rear sway bar, 6 piston BBK with 2 piece floating rotors, e60 short shift kit, BC coilovers, resonator delete, elec fan conversion
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post #6 of 7 (permalink) Old 01-15-2017, 05:57 PM Thread Starter
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going with anything aftermarket is too much money to spend on something just for the fun of it
my total cost will be under $100 $30 for the WRX computer $15 of shipping $40 for the donor computer a few $ of heatshrink and pieces of wires

the WRX computer does a full VTD control including some nice thing like putting the car in third gear to get some compression when the ABS is working to stop the car

I don't know if the Power mode and the Snow hold mode are still in the software of the WRX I will need to add a few wires for that, soldered straight on the pc board inside

2001 Canadian Outback H6, same interior as a VDC without the VDC, now riding on a JDM Lancaster VTD transmission

1999 Dodge Avenger aka Black Beauty, my summer beast
AlainB is online now  
post #7 of 7 (permalink) Old 01-15-2017, 08:58 PM Thread Starter
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Car: 2001 Outback H6 canadian edition with JDM Lancaster VTD 4EAT
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so according to the service manual the h6 vdc has no connection between the ABS and the TCU while the european H4 VDC does on pinB55 21
that explains why I don't have a wire there
looking at the WRX manual it does need it

so next step soldering a few new wires and making them secure and splicing them in the new harness plus a new connector the extra features I want to try

2001 Canadian Outback H6, same interior as a VDC without the VDC, now riding on a JDM Lancaster VTD transmission

1999 Dodge Avenger aka Black Beauty, my summer beast
AlainB is online now  
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