Mikecaprice
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VT 5lt to VS S3 wiring conversion
Introduction
you to can so what they say cant be done
I have written this guide on how to rework VT 5lt engine looms into VS S3 engine looms the rework its self is not difficult to do the hard part is knowing what goes where and why so I have written this guide as basic and as comprehensive as possible I highly recommend looking at and having the loom diagrams on hand and double check each wire with a multimeter as you go
this is written with assumed knowledge that you are capable to do the mechanical side of the conversion and have the required VN to VS parts cross member / mounts, tail shaft, radiator exhaust power steering hoses ect the VT power steering pump alternator can be used in a VS with no issues and only require minor changes
the VT ECU auto/man is the same as the VS S3 auto/man only requires a memcal swap or rewrite with a VS S3 tune
no you can not use a vs or vt v6 ecu they only have 6 injector drivers
be careful with ebay specials some may claim to be VS S3 when they are VT with VATS removed and will cause the cell / engine light to be on and not function for fault codes and cause other issues
for my conversion I used https://mrmodule.com.au/ https://www.ebay.com.au/usr/mrmodule
Mr Module was super helpful and knew exactly was after very quick with postage full instructions included brand new aftermarket memcal I highly recommend him I got him to burn me a short memcal with DRRS the 195kw S3 ute recall replacement for CNPD
DRRR is the manual VS S3 recall replacement for CNPC 195kw same as you would find in a vs maloo
All VT looms have a knock sensor so the 195kw tune will work just fine
Parts needed
VT 5lt engine loom auto or manual
Sacrificial VS V6 engine loom or at a minimum the 2 engine bay plugs 1 under dash plug 1 full length green single temp sensor wire and 1 AC plug if using VS AC compressor
Tools needed small flat heads wire cutters wire strippers soldering iron solder heat shrink electrical connector pick set or small 1mm round screw driver grind 2 flat sides on it and put a slight curve in the end Multi-meter or test light with power source electrical tape and optional choice of beverages
Some connections are repeated throughout the top half are from the PCM / ECU plugs and pins to their respective locations and the latter half is a complete list of the VS plugs and pins to their respective locations for easy cross reference and checking with multi-meter / test light and to assist those who are colour blind and some VT 5lt engine loom wire colours do not match up to their corresponding body loom colours I am led to believe that some wire colours where carried over from the VS and others are to do with the 5lt being a unintended hang over as the VT was only meant to be V6 and LS1 so there is some weird cross over limbo going on with the 5lt looms
There are some unused wires repurposed to minimise the amount of tape and conduit required to be removed and added to reduce the chances of wire breakage you can strip the loom add remove as much or as little as you like but I have laid it out as simple as possible K.I.S.S.
Electrical work especially to this degree tends to scare the **** out of people can’t blame them when you have looms wide open wires everywhere and lose track of things
A3 red / black VT serial data remove replace with red / black VS plug 3 pin 4 serial data terminates at OBD2 port pin 9
A8 red / black cont +12v VT plug 3 pin 6 to VS plug 1 pin 4
B8 red / black cont +12v VT plug 3 pin 6 to VS plug 1 pin 4
B3 green /black to ac transducer remove
C5 violet /white speed signal to cluster remove
D13 grey D14 grey/black o2 sensor
this o2 sensor is the one used in a VS located in the left side of the Y pipe but in VT is located in the right catalytic convertor down pipe
VT headers extractors do not fit the VS body so VN thru VS are required (lh vt cast iron header is the same as vn thru vs however the rh is vt only)
The o2 sensor wires will either need to be extended to reach over the top of the transmission to the passenger’s side or a second o2 sensor bung fitted to the driver’s side
D15 violet D16 violet/black lh o2 sensor some memcal tunes may use this sensor some don’t ask your memcal supplier tuner about if only using 1 o2 sensor you may swap D15/D16 into D13/D14 which will then reach the left Y pipe o2 sensor unmodified
F12 blue power eco switch remove
E12 blue oil pressure sensor remove connect to blue wire from F12
VT plug 3 pin 1 to VS plug 2 pin 2
Removing F12 and E12 and joining them saves on opening up loom to redirect oil pressure wire from the ECU to the VS plugs as the VT oil pressure light is controlled by the BCM and retains the same blue colour for simplicity
F5 blue P/N safety switch remove not needed if using the VS P/N safety switch on the shifter
F6 blue / white ac fan relay control wire
VT plug 2 pin 3 to VS plug 2 pin 6
F7 blank add yellow / black trip computer / fuel usage VS plug 3 pin 8
F8 red / white VT crank sense wire remove replace with brown / white from VS plug 3 pin 1
F12 blue PWR / ECO switch remove replace with blue PWR /ECO switch from VS plug 3 pin 2
(F12 blue PWR / ECO switch remove leave blank for manual)
VS 6 pin plug referred to as plug 1
Vs plug 1 pin 1 violet not used on v8
VS plug 1 pin 2 pink IGN +12v to VT plug 2 pin 2 pink IGN +12v engine sensors
VS plug 1 pin 3 green / white fuel pump relay control to VT plug 1 pin 5 green / white fuel pump relay control
VS plug 1 pin 4 red IGN +12v to VT plug 2 pin 7 red IGN +12v injectors and pin 8 light green IGN +12v coil
VS plug 1 pin 5 pink / blue IGN +12v transmission power to VT plug 1 pin 6 pink / blue IGN +12v transmission power goes to pin 4 on round transmission plug
VS plug 1 pin 6 red / black battery cont +12v PCM to VT plug 3 pin 6 red / black battery cont +12v PCM
VS 8 pin plug referred to as plug 2
VS plug 2 pin 1 blank
VS plug 2 pin 2 blue oil pressure switch to VT plug 3 pin 1 blue PWR / ECO switch refer E12 F12
VS plug 2 pin 3 green coolant temp sensor gauge to VT plug 2 pin 8 light green park neutral safety switch open T junction at drivers side injectors locate light green wires test probe to confirm the VT plug 2 pin 8 to P/N switch and not the light green shift solenoid from PCM C2
Remove conduit from 2 pin temp sensor to injectors loosely tape the green single temp wire along the 2 wire temp sensor replace the conduit and tape up as you see fit to the t junction cut to an length to meet the light green and attach together saves opening up 3/4 of the loom to add 1 wire from the strut tower plugs all the way down to the 2 pin temp sensor
VS plug 2 pin 4 brown tacho signal coil neg to VT plug 3 pin 3 brown / red tacho signal
VS plug 2 pin 5 blue / white cooling fan relay control VT plug 1 pin 7 blue / white high speed fan relay control
VS plug 2 pin 6 green / black AC relay control to VT plug 2 pin 3 light green / black AC relay control
VS plug 2 pin 7 green AC clutch to VT plug 2 pin 4 green
If using VT AC compressor no need to change plug if using VS AC compressor you will need to change plug on VT loom the 2nd wire is black to loom earth don’t need to do anything with it if fitting VS AC compressor probably wouldn’t hurt to put an earth ring terminal on it and put it to the ac compressor
VS plug 2 pin 8 brown AC request to VT plug 1 pin 2 violet / white VSS speed signal C5 pull and move to E11 to use as AC high pressure switch / climate control
VS 8 pin plug under dash plug next to ECU
VS plug 3 pin 1 brown white brake fail to F8
VS plug 3 pin 2 blue PWR / ECO switch to PCM F12
VS plug 3 pin 3 white / black diagnostic test enable to PCM F14
VS plug 3 pin 4 red / black serial data to A3 remove VT red / black serial data
VS plug 3 pin 5 pink PCM IGN +12v to A4 remove VT pink / black
VS plug 3 pin 6 violet / white VSS to C5
VS plug 3 pin 7 yellow / black fuel usage signal to F7
VS plug 3 pin 8 brown / white to F5
For simplicity I have labeled and numbered each plug for easier reference
I highly recommend marking the VT plugs the 2 black plugs look very much the same
this guide should also work in a VR only difference I found being plug 1 is a differnt size vs being larger but the pin out is the same
however I havent done this in a VR which would need a VATS removed tune so procede with caution
VS 6 PIN PLUG 1
1 VIOLET 2 PINK 3 GREEN/WHITE
4 RED 5 PINK/BLUE 6 RED/BLACK
VS 8 PIN PLUG 2
1 BLANK 2 BLUE 3 GREEN 4 BROWN
5 BLUE/WHITE 6 GREEN/BLACK 7 GREEN 8 BROWN
VS 9 PIN PLUG 3
1 BROWN/WHITE 2 BLUE 3 WHITE/BLACK 4 RED/BLACK
5 PINK 6 VIOLET/WHITE 7 BLANK 8 YELLOW/BLACK 9 BROWN/WHITE
VT YE110 PLUG 1
1 BLANK 2 VIOLET 3 RED/WHITE 4 BLUE
5 GREEN/WHITE 6 BLANK 7 BLUE 8 BLANK
VT YE111 plug 2
1 GREY/BLUE 2 PINK 3 LT GREEN/BLACK 4 GREEN
5 GREEN 6 GREY 7 RED 8 BLANK
VT YE112 PLUG 3
1 BLANK 2 PINK 3 BROWN 4 BLANK
5 LT GREEN 6 VIOLET 7 TAN/BLUE 8 RED/BLACK
WHITE/BLACK
LEFT small flat head modified to de pin ecu plugs
BOTTOM RIGHT ecu plug comb remove to de pin ecu plugs replace before putting plugs into ecu as wires can be pulled out of plug wit out comb in place when removing plugs from ecu
TOP MIDDLE retainer tab on ecu wires
TOP RIGHT approximate position of tool to remove pins
MIDDLE BOTTOM tab inside ecu plug that the retainer catches on
To remove wires from ecu plugs push wire in to plug insert tool against the edge of the hole where the arrow is in bottom middle picture lever tool against edge feeling for the spring tension of the retainer and slowly pull wire and push in tool at the same time
Forcing the wire out of the plug by pulling will remove wire bending the retaining tab backwards potentially damaging it beyond use I highly recommend practicing on unused pins in the sacrificial VS engine loom plugs its not hard to do with some practice and feel for it
You don’t need to insert the tool all the way as it wont push the spring tab in instead causing it to catch on the edge of the tab inside the plug
To make the tool take a small flat head screw driver and grind a flat on opposite sides and put a small curve in the end of it
tools exist to de pin but the average person doesn’t have them or the use to buy a whole set of de pining picks to do 1 job once
Introduction
you to can so what they say cant be done
I have written this guide on how to rework VT 5lt engine looms into VS S3 engine looms the rework its self is not difficult to do the hard part is knowing what goes where and why so I have written this guide as basic and as comprehensive as possible I highly recommend looking at and having the loom diagrams on hand and double check each wire with a multimeter as you go
this is written with assumed knowledge that you are capable to do the mechanical side of the conversion and have the required VN to VS parts cross member / mounts, tail shaft, radiator exhaust power steering hoses ect the VT power steering pump alternator can be used in a VS with no issues and only require minor changes
the VT ECU auto/man is the same as the VS S3 auto/man only requires a memcal swap or rewrite with a VS S3 tune
no you can not use a vs or vt v6 ecu they only have 6 injector drivers
be careful with ebay specials some may claim to be VS S3 when they are VT with VATS removed and will cause the cell / engine light to be on and not function for fault codes and cause other issues
for my conversion I used https://mrmodule.com.au/ https://www.ebay.com.au/usr/mrmodule
Mr Module was super helpful and knew exactly was after very quick with postage full instructions included brand new aftermarket memcal I highly recommend him I got him to burn me a short memcal with DRRS the 195kw S3 ute recall replacement for CNPD
DRRR is the manual VS S3 recall replacement for CNPC 195kw same as you would find in a vs maloo
All VT looms have a knock sensor so the 195kw tune will work just fine
Parts needed
VT 5lt engine loom auto or manual
Sacrificial VS V6 engine loom or at a minimum the 2 engine bay plugs 1 under dash plug 1 full length green single temp sensor wire and 1 AC plug if using VS AC compressor
Tools needed small flat heads wire cutters wire strippers soldering iron solder heat shrink electrical connector pick set or small 1mm round screw driver grind 2 flat sides on it and put a slight curve in the end Multi-meter or test light with power source electrical tape and optional choice of beverages
Some connections are repeated throughout the top half are from the PCM / ECU plugs and pins to their respective locations and the latter half is a complete list of the VS plugs and pins to their respective locations for easy cross reference and checking with multi-meter / test light and to assist those who are colour blind and some VT 5lt engine loom wire colours do not match up to their corresponding body loom colours I am led to believe that some wire colours where carried over from the VS and others are to do with the 5lt being a unintended hang over as the VT was only meant to be V6 and LS1 so there is some weird cross over limbo going on with the 5lt looms
There are some unused wires repurposed to minimise the amount of tape and conduit required to be removed and added to reduce the chances of wire breakage you can strip the loom add remove as much or as little as you like but I have laid it out as simple as possible K.I.S.S.
Electrical work especially to this degree tends to scare the **** out of people can’t blame them when you have looms wide open wires everywhere and lose track of things
A3 red / black VT serial data remove replace with red / black VS plug 3 pin 4 serial data terminates at OBD2 port pin 9
A8 red / black cont +12v VT plug 3 pin 6 to VS plug 1 pin 4
B8 red / black cont +12v VT plug 3 pin 6 to VS plug 1 pin 4
B3 green /black to ac transducer remove
C5 violet /white speed signal to cluster remove
D13 grey D14 grey/black o2 sensor
this o2 sensor is the one used in a VS located in the left side of the Y pipe but in VT is located in the right catalytic convertor down pipe
VT headers extractors do not fit the VS body so VN thru VS are required (lh vt cast iron header is the same as vn thru vs however the rh is vt only)
The o2 sensor wires will either need to be extended to reach over the top of the transmission to the passenger’s side or a second o2 sensor bung fitted to the driver’s side
D15 violet D16 violet/black lh o2 sensor some memcal tunes may use this sensor some don’t ask your memcal supplier tuner about if only using 1 o2 sensor you may swap D15/D16 into D13/D14 which will then reach the left Y pipe o2 sensor unmodified
F12 blue power eco switch remove
E12 blue oil pressure sensor remove connect to blue wire from F12
VT plug 3 pin 1 to VS plug 2 pin 2
Removing F12 and E12 and joining them saves on opening up loom to redirect oil pressure wire from the ECU to the VS plugs as the VT oil pressure light is controlled by the BCM and retains the same blue colour for simplicity
F5 blue P/N safety switch remove not needed if using the VS P/N safety switch on the shifter
F6 blue / white ac fan relay control wire
VT plug 2 pin 3 to VS plug 2 pin 6
F7 blank add yellow / black trip computer / fuel usage VS plug 3 pin 8
F8 red / white VT crank sense wire remove replace with brown / white from VS plug 3 pin 1
F12 blue PWR / ECO switch remove replace with blue PWR /ECO switch from VS plug 3 pin 2
(F12 blue PWR / ECO switch remove leave blank for manual)
VS 6 pin plug referred to as plug 1
Vs plug 1 pin 1 violet not used on v8
VS plug 1 pin 2 pink IGN +12v to VT plug 2 pin 2 pink IGN +12v engine sensors
VS plug 1 pin 3 green / white fuel pump relay control to VT plug 1 pin 5 green / white fuel pump relay control
VS plug 1 pin 4 red IGN +12v to VT plug 2 pin 7 red IGN +12v injectors and pin 8 light green IGN +12v coil
VS plug 1 pin 5 pink / blue IGN +12v transmission power to VT plug 1 pin 6 pink / blue IGN +12v transmission power goes to pin 4 on round transmission plug
VS plug 1 pin 6 red / black battery cont +12v PCM to VT plug 3 pin 6 red / black battery cont +12v PCM
VS 8 pin plug referred to as plug 2
VS plug 2 pin 1 blank
VS plug 2 pin 2 blue oil pressure switch to VT plug 3 pin 1 blue PWR / ECO switch refer E12 F12
VS plug 2 pin 3 green coolant temp sensor gauge to VT plug 2 pin 8 light green park neutral safety switch open T junction at drivers side injectors locate light green wires test probe to confirm the VT plug 2 pin 8 to P/N switch and not the light green shift solenoid from PCM C2
Remove conduit from 2 pin temp sensor to injectors loosely tape the green single temp wire along the 2 wire temp sensor replace the conduit and tape up as you see fit to the t junction cut to an length to meet the light green and attach together saves opening up 3/4 of the loom to add 1 wire from the strut tower plugs all the way down to the 2 pin temp sensor
VS plug 2 pin 4 brown tacho signal coil neg to VT plug 3 pin 3 brown / red tacho signal
VS plug 2 pin 5 blue / white cooling fan relay control VT plug 1 pin 7 blue / white high speed fan relay control
VS plug 2 pin 6 green / black AC relay control to VT plug 2 pin 3 light green / black AC relay control
VS plug 2 pin 7 green AC clutch to VT plug 2 pin 4 green
If using VT AC compressor no need to change plug if using VS AC compressor you will need to change plug on VT loom the 2nd wire is black to loom earth don’t need to do anything with it if fitting VS AC compressor probably wouldn’t hurt to put an earth ring terminal on it and put it to the ac compressor
VS plug 2 pin 8 brown AC request to VT plug 1 pin 2 violet / white VSS speed signal C5 pull and move to E11 to use as AC high pressure switch / climate control
VS 8 pin plug under dash plug next to ECU
VS plug 3 pin 1 brown white brake fail to F8
VS plug 3 pin 2 blue PWR / ECO switch to PCM F12
VS plug 3 pin 3 white / black diagnostic test enable to PCM F14
VS plug 3 pin 4 red / black serial data to A3 remove VT red / black serial data
VS plug 3 pin 5 pink PCM IGN +12v to A4 remove VT pink / black
VS plug 3 pin 6 violet / white VSS to C5
VS plug 3 pin 7 yellow / black fuel usage signal to F7
VS plug 3 pin 8 brown / white to F5
For simplicity I have labeled and numbered each plug for easier reference
I highly recommend marking the VT plugs the 2 black plugs look very much the same
this guide should also work in a VR only difference I found being plug 1 is a differnt size vs being larger but the pin out is the same
however I havent done this in a VR which would need a VATS removed tune so procede with caution
VS 6 PIN PLUG 1
1 VIOLET 2 PINK 3 GREEN/WHITE
4 RED 5 PINK/BLUE 6 RED/BLACK
VS 8 PIN PLUG 2
1 BLANK 2 BLUE 3 GREEN 4 BROWN
5 BLUE/WHITE 6 GREEN/BLACK 7 GREEN 8 BROWN
VS 9 PIN PLUG 3
1 BROWN/WHITE 2 BLUE 3 WHITE/BLACK 4 RED/BLACK
5 PINK 6 VIOLET/WHITE 7 BLANK 8 YELLOW/BLACK 9 BROWN/WHITE
VT YE110 PLUG 1
1 BLANK 2 VIOLET 3 RED/WHITE 4 BLUE
5 GREEN/WHITE 6 BLANK 7 BLUE 8 BLANK
VT YE111 plug 2
1 GREY/BLUE 2 PINK 3 LT GREEN/BLACK 4 GREEN
5 GREEN 6 GREY 7 RED 8 BLANK
VT YE112 PLUG 3
1 BLANK 2 PINK 3 BROWN 4 BLANK
5 LT GREEN 6 VIOLET 7 TAN/BLUE 8 RED/BLACK
WHITE/BLACK
LEFT small flat head modified to de pin ecu plugs
BOTTOM RIGHT ecu plug comb remove to de pin ecu plugs replace before putting plugs into ecu as wires can be pulled out of plug wit out comb in place when removing plugs from ecu
TOP MIDDLE retainer tab on ecu wires
TOP RIGHT approximate position of tool to remove pins
MIDDLE BOTTOM tab inside ecu plug that the retainer catches on
To remove wires from ecu plugs push wire in to plug insert tool against the edge of the hole where the arrow is in bottom middle picture lever tool against edge feeling for the spring tension of the retainer and slowly pull wire and push in tool at the same time
Forcing the wire out of the plug by pulling will remove wire bending the retaining tab backwards potentially damaging it beyond use I highly recommend practicing on unused pins in the sacrificial VS engine loom plugs its not hard to do with some practice and feel for it
You don’t need to insert the tool all the way as it wont push the spring tab in instead causing it to catch on the edge of the tab inside the plug
To make the tool take a small flat head screw driver and grind a flat on opposite sides and put a small curve in the end of it
tools exist to de pin but the average person doesn’t have them or the use to buy a whole set of de pining picks to do 1 job once