I have a problem with my 2004 Shogun 3.2 DiD and I need to trace the wiring between the auto transmission and the transmission ECU. Can anyone help me with the wiring diagrams for this vehicle please ?

I have the workshop manual (PWJE0001) but the wiring information is very limited and doesn''t show the interconnection details. I think that I need the Electrical Wiring Manual; (PHJE0001).

Would be willing to compensate postage / effort. Could swap workshop manual.

Cheers, John

Is there any specific reason , issue that yu are having. like need to kno the shift solenoid wiring and seed sensor etc

Hi Kit

I have had an intermittent issue where the AT changes gear for no apparent reason, causing a discontinuity in drive power. Initial OBD diagnostics revealed some problem codes indicating communications issues between the engine ECU and the transmission ECU.

I have also noticed that the cruise control drops out intermittently (again a problem code was returned by the ECU) and the traction control warning light come on at higher speeds but goes out when I back off the throttle a bit.

I have been driving in auto at low speed but then change to manual control at higher speeds in case the AT has a 'fit' and decides to change into first at full speed. :o

The problem has not re-occured in the last week so I want to do some data logging using my Elmscan OBD interface and a laptop so that I can try and capture what is going on when the fault occurs. It would also be useful to do some separate logging of the transmission solenoid control wires to see what is going on during a fault incident. Any advice / data appreciated.

Cheers, John

That is rough one , Im spossed to have a few Pajero manuals , i could look thru and try to get sumthin scanned up of the electrical. Have yu checked the plug ins at the TCM? has yur speedometer ever acted erratic? . I have seen these a couple times in a 1998-2003 Pajero . On the 2003 there was an issue with a wheel speed sensor. That model , like many Mitsubishi models with INVECS II like my Diamante , and the Steptronic/Invecs variant in my Triton where yu can manually shift up and down gears, the TCM and ECM pic up the vehicle speed using the wheel speed sensors and there is no speed sensor on the transmission unit itself. On the 2003 there was an issue with the wheel speed sensor , , the rear speed sensor at the axle , it was giving the ecm and tcm a diffrent speed than the front wheel speed sensors were , making the traction light come on at times and also making the transmission shift erratically. On The 1998 it was the TPS , giving the TCM incorrect throttle positioning , so even if the throttle was fully open , the sensor was giving a partial open signal making the transmission shift prematurely. On the last 2 cases the TCM was just faulty , it sent failure data communication codes to teh ECM(ecm to tcm communication link error) also at times downshifting and cutting engiune power and emmiting the traction control light. And errattic shifting patterns.

Thanks for your detailed reply Kit.



Yes, I've given it a visual inspection plugged in. I haven't unplugged the cable at the TCM yet. I also have an issue with my OBDII scantool at the moment and I didn't want to loose any recent Trouble codes until I had downloaded them.



Not that I've noticed, but then I havn't really been looking too hard at it.

My transmission is INVECS II with tiptronic manual mode (V5A5A)



The symptoms that you described seem to fit the behaviour that I have seen very closely.

I will take a look at monitoring the wheel speed sensor outputs. Do you know what the fix was to this issue ?

I will also do a visual inspection of the TCM to saee if I can spot anything. I am an electronics engineer by profession so I should be able to see anything physically damaged.

If you get a chance to send me some of the electrical wiring diagrams then I would be very grateful.

Many Thanks, John

HI John ,

on the last 2 issues i had mentioned that had erratic issues as yurs and also illuminated the traction light and enabled the traction at times i replaced the TCM . I was trying to see if i had any wiring that i can get to yu but alot of wut i did in tihs cases were the same as yu alot of tech work and scanner work . yur an electrical engineer? cool , Im a mechanical engineer ha ha ha.

That transmission yu have is the same one that is on my Triton but i i think yur controls and setup is more closelly to that of my car.Things yu need to look for , my car is a 1997 Diamante VR-S with Super INVECS II , the transmission is a W5A51 , so we both have identical controls and setup since they are both 5 speed and AWD. Should be like my transmission there is no speed sensor directlly mounted to the transmission , with INVECS II and Steptronic. The speed is calculated to the TCM and ECM by the individual wheel speed sensors, these wheel speed sensors work in conjunction with the ABS and traction control system along with INVECS .

In regular D range , the TCM calculates all the individual wheel speed , normally they are all the same (anything more then 3-5 mph and higher differance between wheel speeds will cause a "low traction" issues between the TCM and Traction units and power delivery will be delayed) Also the TCM receives Throttle position Sensor input readings , This aids the transmission at shifting points , by knowing the varied position of the throttle , as in if it reads the throttle is 75 percent open it will prolonged shifts for maximum acceleration. If the TCM has an issue calculating and reading TPS signal , it can be an internal TCM fault and cause premature shifting , but not shifting out to a lower gear as in 2nd or 1st while cruising.

Also the TCM monitors the transmission on these models the input shaft speed against the engines RPM , so the TCM can gauge engine load in a gear , and also vary shifting pressure when it performs shifts. Loss of data to the input shaft sensor can cause sloppy shiftings , adrupt downshift , very hard shifts.

Things to look for with the scanner :
Engine load , the individual wheel speed is important , there should not be any variance more than 1 MPH at any given time on straight aways . Throttle Position load /position should be watched also. Transmission shift pressure, and gear range selection on the Scanner. I hope that any of this helps .

Anytime , Kit

Thanks for the advice Kit, I'll take a look at those wheel sensor outputs and let you know what I find.

Cheers, John