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Thread: Engine Electrical system fault.

  1. #1

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    Engine Electrical system fault.

    Mostly when this comes on you get the bong and the TRC light comes one and wont go off.

    This is because this fault disables the TRC, switching it off. All the cars that I have seen this fault on have had the TRC turned off, this is not to say that some may not.

    This is the Klingon fault you will see on your dash.
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  2. #2

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    As I said, all the cars that I have had with this fault code showing have always had the TRC light on also.

    This is the light, it is far right on the dash.
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    If you have this fault you need to follow this to see what fault codes you have.

    Lift the diagnostic port cover that is under the bonnet.

    get a 3 pin plug and put a plug end in these three port holes.

    E1 -- TC -- TS.

    Your port will be dirty and covered in grease, use this picture to find the right ports.
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    Once this is done, get in the car and start it up.

    You will find that the Klingon fault message has gone and you will have a new message in green with a white square block to the right hand side.

    Once you see this, hit the scroll button on the switch bottom right of the dash, it will scroll through all the options.

    These being, A/D (gear box) ABS -- SUS -- TRC, if you have a UZZ32 you will also get a 4WS option.

    ALL (except the A/D) will say "No good" ABS - NG, TRC - NG, SUS-NG, but dont worry about this, mostly its because the car isnt moving and the ABS ECU is not receiving any input from the sensors on the wheels. Forget these unless you have a problem with that part of the car.

    Press the scroll button until it shows TRC - NG, it will have the white square on the right.

    Once you have this, wait for about a minute or two, you will then get a list of numbers, take these down. The car I am working on right now has 3 numbers, 24 - 45 - 51. We can get to this later.

    When the fault codes have finished being listed a white square will come up on the left hand side, this is the indicator to tell you it has finished scrolling and it will start over again until you turn it off.
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    Now at least you know what is wrong with your car.

    Sorry, but that even made me Like fook it does.

    I had 24 -45-51.

    Lets do these next.

    Error code TRC 24.

    Here you go.
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    Error code TRC 26 details.
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    I took this unit off, cleaned it up, sprayed it with WD40 to clean it, cleaned the wiring loom, put it back together and it made no difference.

    I took one from a good unit I had and changed them over, still the same, I know believe that this unit is good, but the Klingon is telling me that it is at fault.

    Maybe the TRC EUC is lying ????

    I continued.

  8. #8

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    Error code TRC 45.

    Here we go again.....................
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    Ok then, you have all got that haven't you, so I don't need to go into that again

    HOURS I spent deciphering that, I have got it now so its another thing I am happy with.


    I took this unit off as I did the other one, again I cleaned it, sprayed it with WD40 and cleaned/checked the wires, I put it all back and again it was the same, So I changed it for another and again it was the same, so again I thing that this is NOT at fault and again I was being lied to.

    I can tell you that when I had this fault on Loaded I did fix the problem by changing these throttle position sensors, so you might be lucky with your car and your problem might be in this area.

  10. #10

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    Next is Error code TRC 51.

    All the book gives you is this.

    It tells you that the TRC ECU is at fault.
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  11. #11

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    Right then, lets get that TRC ECU out of there and have a look.

    I took it off and changed it for 2 that I have here.

    It sits behind the glove box, you have to take that off to get to it.
    In the picture below it is the silver one left of the black one that is left of the green one.

    I thought that as the throttle control sensors were ok it had to be the TRC ECU and that even though every time I fitted a different ECU I thought it had to be bad so I tried another one.

    But every time I checked the fault code was still there.

    Now I am thinking that the ABS is connected to the TRC, so I wonder if the ABS ECU is at fault, and it is feeding a bad signal to the TRC ECU?, so I tried 4 of those, and again every time I tried it and started the car the fault was still there.

    Argggggggggggggggggggggggg

    Here is the TRC ECU.



    The other two ECU's are the main engine ECU and the ABS one, they are under the carpet on the passenger's side foot well.

    Pull the carpet back, remove the cover and they sit there held in with one 10 mill nut each, they are easy to get to.

    The ECU with the numbers 32 on it is the main engine ECU, the other to the left of that one shows it is the ABS ECU.

    As I said I change both of these many times and here are the ones I have in stock,
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  12. #12

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    This is ball cocks, the Klingon message and the fault codes and the workshop manuals tell me it is either the throttle control sensors, or the ECU and it is neither.

    You have no idea how many hours it takes to do all this as every time you have to suck it and see.

    I stopped and walked away, had some lunch, had some thoughts about burning the car to the ground and wondering what else it could be.

    Did I check the TRC and ABS relays and the fuse ????

    Of course I did, here are the relays and the TRC fuse in the main fuse box so you know what to look for. I changed the relays for another 32 I have here that I know to be good, and strangely enough it made no difference



    Picture 1 is obviously the relay box.

    Picture 2 is the main fuse box and the cover says that this is the fuse for the TRC

    Picture 3 is the workshop manual picture for the TRC fuse. Dunno why these should be different.

    Picture 4 is the fuse box next to you drivers foot behind the panel is it is the live for the TRC ECU.

    Why these show differences I dont know, and as none of them were blown I dont know what each does.

    At least you can check all of them if you have this problem.
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    Ok then, I have checked the throttle sensors, the relays, the fuses, the ECU's and even the tyres and water in the rad, and still it aint fixed.

    I have been on it about 8 hours now and this does not include the hours late night and today reading up and the trials and errors putting bits on and then taking them off again.

    IT STILL DON'T WORK.

    Right then, lets try the main ECU.

    NO BLOODY BONG, all good, so after all that it was the main ECU, it must be knackered inside.

    At bloody last



    You all know what this means ?

    I STILL aint been beat by a Soarer


    Now to add the bill up.

    Sorry Brian Hahahahahahaahahahahahah.

  14. #14

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    I sorted this today, yet another Soarer saved by the sanctuary.

  15. #15

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    Well done! You must have some patience
    I have a problem with my TRC in that after the engine swap it does'nt work and thus is disconnected, now every time i start the car i get an annoying bong and "trc" which stays on permentaly is there any way of fooling the TRC ecu into thinking all is well? I might just leave it for you to play with in a few months [i plan on bringing the car across the water for you to do a few jobs at the end of the summer if you can fit me in]

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