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Vitara Wiring Harness and ECU Pinout
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Author:  Boneheimer [ Tue Jan 17, 2012 5:21 am ]
Post subject:  Vitara Wiring Harness and ECU Pinout
:helloo:

Have been doing a little bit of research, and looking for a wiring diagram for a vitara in order to splice looms.
I have checked with my local suzuki dealership and they're too busy to help, I also asked google, but probably the wrong thing, so....

I was wondering when the switch over date is for the vitara wiring diagram in the 95-96 period, as all the wiring diagrams I've seen are for either 91-95 models, or 96-98.

So basically my question is which wiring diagram should I be using?
( I ask this because it's not always so simple as build date, eg. my moto is an 09 build, but a 2010 model. )


Details; Vitara
Type: E-TA02C - (SE416?)
Engine: G16B - 16 valve
Build date: November 95

Also the distributor is the 7 pin variant if this helps

Cheers :wink:
Author:  royce [ Tue Jan 17, 2012 6:29 am ]
Post subject:  Re: Vitara Wiring Harness
7 pin dissy and 3 wire afm I would go with the later version

but easiest to look at both looms and compare pinouts of key things like the dissy and ecu powers
Author:  Boneheimer [ Tue Jan 17, 2012 7:53 am ]
Post subject:  Re: Vitara Wiring Harness
royce wrote:
7 pin dissy and 3 wire afm I would go with the later version


This is what I was thinking, but will compare the pinouts as you said, thanks royce
Author:  Boneheimer [ Tue Jan 17, 2012 11:04 pm ]
Post subject:  Re: Vitara Wiring Harness and ECU Pinout
Ok, so based on the wires I traced i'm pretty sure that I'm running the 96+ configuration.

I had a look at my ecu pinout by taking the cover off, and this is what I found:

Image

Which is a completely different system to that on the best wiring diagram I could find HERE

If anyone knows how these two systems relate, or if there is a better pinout diagram available please let me know, as I ran out of welding gas and can't get any more today :cry: leaving wiring as the only thing I can do for now...
Author:  JrZook [ Tue Jan 17, 2012 11:11 pm ]
Post subject:  Re: Vitara Wiring Harness and ECU Pinout
Do you have both looms? Where abouts in Cairns are ya?
Author:  Boneheimer [ Tue Jan 17, 2012 11:17 pm ]
Post subject:  Re: Vitara Wiring Harness and ECU Pinout
Yep, both out of the cars, I'm out at Clifton beach
Author:  Boneheimer [ Wed Jan 18, 2012 4:32 am ]
Post subject:  Re: Vitara Wiring Harness and ECU Pinout
Ok, so I've been looking further, and still have NFI how to do this.
I have done a little bit of trimming on the wiring diagram itself, to leave what I think is vital for a M/T vitara.

Even with cutting all of the auto crap out of the diagram i'm still at a loss to how the ecu and diagram pinouts relate.

For example the orange wire from the distributor goes to "B4" on the diagram, but IRL it goes to the pin marked "G" on the ecu. :evil:

I'll attach the updated wiring diagram as well, it's a WIP.
Author:  royce [ Wed Jan 18, 2012 5:06 am ]
Post subject:  Re: Vitara Wiring Harness and ECU Pinout
it will make more sense if you use wire colours and focus only on any circuit that isnt between teh ECU and something you can plug into teh engine
Author:  Boneheimer [ Wed Jan 18, 2012 8:01 am ]
Post subject:  Re: Vitara Wiring Harness and ECU Pinout
The majority of the wire colours don't match up, might have to go back to local suzuki dealer and hassle them for the correct diagram...
Author:  Rhinoman [ Wed Jan 18, 2012 8:12 pm ]
Post subject:  Re: Vitara Wiring Harness and ECU Pinout
Boneheimer wrote:
Which is a completely different system to that on the best wiring diagram I could find HERE


I'm pretty sure that is a US diagram for an OBD2 ECU with four connectors. Yours is OBD1, I don't recognise the number on the connector, what part number is the ECU? do you have an immobiliser? the pin out is different if you do. The connector pin numbers are usually all messed up on these ECUs, I've no idea why. The real pin numbers are molded in the mating half of the connector.
On most wiring diagrams looking staright into the ECU connector, right hand connector is A1 is top right, A11 top left, A12 is bottom right, A22 bottom left.
Left hand connector, follows the same pattern with B1 top right and B26 bottom left.
I'm currently hacking a 16V ECU - one of my tasks for tomorrow is to scan the schematic. I'll post a link up when I've done that. Out of interest can you please post a picture of the complete PCB? Thanks.

Edit: on the shematic I have A4 is the orange wire which tallies witth what you have.
Author:  Boneheimer [ Wed Jan 18, 2012 9:54 pm ]
Post subject:  Re: Vitara Wiring Harness and ECU Pinout
Rhinoman wrote:
I'm pretty sure that is a US diagram for an OBD2 ECU with four connectors. Yours is OBD1


This is correct, there was only one O2 sensor on the donor Vit.

Rhinoman wrote:
What part number is the ECU?


I'm not sure where the part number is? The serial is JE331B761B - Mitsubishi type.

Rhinoman wrote:
Do you have an immobiliser?


Unsure

Rhinoman wrote:
The real pin numbers are molded in the mating half of the connector.


Neither the male or female plugs have any numbers molded into them, the circuit board has eight pin ID's printed on it, in the image above you can see the pin numbers derived from those. You can see a few of the actual pin numbers in the image below.

Rhinoman wrote:
Out of interest can you please post a picture of the complete PCB? Thanks.


By PCB you mean printed circuit board? If so I tried to keep the image as large as possible for detail.
Image

Hopefully this helps :wink:
Author:  Rhinoman [ Thu Jan 19, 2012 7:11 am ]
Post subject:  Re: Vitara Wiring Harness and ECU Pinout
The ECU has the chip fitted for an immobiliser but that may not mean that there is one. The immo ECUs have the fuel pump wire on a different pin to stop you swapping in a non-immo ECU so if you check for that wire that will tell you which one you have.
The other change between ECUS is the EGR valve which can be either a vacuum operated version or a stepper motor, that one is pretty obvious when you check the EGR itself.
Schematic is now here:

http://www.rhinopower.org/repairs/schem ... ematic.pdf

http://www.rhinopower.org/repairs/schem ... te_key.pdf

Thanks for the pic, it looks similar to the 58B90 that we got here. The part number is on the case it will be 33920-something
Cheers
James
Author:  Boneheimer [ Thu Jan 19, 2012 7:47 am ]
Post subject:  Re: Vitara Wiring Harness and ECU Pinout
Rhinoman wrote:
The part number is on the case it will be 33920-something


Here's a pic of the case sticker with the part number:
Image

Thanks for those diagrams and keys, I'll have a look at them tonight, might also have a look on your rhino power forum, looks like it has a lot of useful info. :wink:
Author:  Boneheimer [ Thu Jan 19, 2012 10:08 am ]
Post subject:  Re: Vitara Wiring Harness and ECU Pinout
Just putting this here to keep track of my thoughts and remind me what I have to do tomorrow :roll:

Most of the wires from Rhinoman's diagram match up, but I have yet to trace wires to their respective components to double check.


Things that didn't match up:

A2 - Colour mismatch - trace [Engine start switch]
A5* - Wire present, when diagram shows blank - trace
A17 - Colour mismatch - trace [Diag. switch terminal?]
A21* - No wire, when diagram indicates wire [Fuel pump relay]
B1 - Colour mismatch - trace [Ground]
B2 - Colour mismatch - trace [Ground]
B3 - Colour not indicated on diagram, assume black?
B7 - Colour mismatch - trace [TP Sensor]
B16 - Colour mismatch - trace [Data link connector]
B17 - Diagram shows EGR stepper motor wire, if no stepper motor then WTF is this wire doing here? - trace
B19 - Wire present, when diagram shows blank - trace
B20 - Colour not indicated on diagram, assume black?
B22* - No wire, when diagram indicates wire, also colour not indicated on diagram, assume black? [Ignition switch]

* = terminal which has been newly added or modified to installation of immobiliser control system
Edit: ^^ I'm guessing this is what Rhinoman was talking about above with the immobiliser chip
Author:  tazmanier [ Thu Jan 19, 2012 11:24 am ]
Post subject:  Re: Vitara Wiring Harness and ECU Pinout
Hey mate, this is a screen shot of an PDF that someone has scanned from a haynes or some other manual. so far from ideal I know but If you send me an e-mail I will send the PDF at least. Its for the latter model Vit. Worked a treat for mine and I have an engine from a 96 Vit. dont know what month.

Image

The kicker with this diagram (and mabey yours) is its labled as if you are looking at the back of the plug ie. the plugs are pluged in to the ECU and your looking at it from the back. Took me 6 months of fumblin through it to work that out. But once I did it all matched up apart from 1 or 2 colour mismatches.

-TAZ
Author:  Rhinoman [ Thu Jan 19, 2012 11:55 am ]
Post subject:  Re: Vitara Wiring Harness and ECU Pinout
That diagram is from here:

http://www.rhinopower.org/repairs/schem ... m-g16b.pdf

I didn't post it originally because I find it so difficult to use for the reason that you stated above. I keep meaning to produce a pinout sheet for it.
From your list of problems I suspect Taz is correct and the pinout is an early pin out (59B series not 57B) although there are a few differences on the PCB.
The list of difference for the later 16V immo and non-immo didn't scan properly earlier but its here:

http://www.rhinopower.org/repairs/schem ... hanges.pdf
Author:  zayzuki [ Mon Oct 04, 2021 11:29 am ]
Post subject:  Re: Vitara Wiring Harness and ECU Pinout
anyone know how to connect the tcc for 57b series ecu am seeing 2 wire on the diagram and 3 wire on the transmission
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