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Whats involved in removing water to air cooler of St165/ Getting error code 54.

Discussion in 'Diagnosis/Help' started by nereik23, Oct 24, 2012.

  1. nereik23

    nereik23 Well-Known Member

    Ok, so I havn't removed the water to air cooler off it, but the previous owner has, and he has left 1 diag code coming up on the dash. As in the title its error code 54, apparently it has something to do with the sensor not reading any resistance from the sensor which would have been connected to the tank when it was originally setup.

    Just wondering if anyone can run through the removal process and possible someway of getting rid of it. I'm think maybe there something that I have missed.

    SO far, I have tried bridging the connector, earth the neg side of it to the chassis and trying it again. Has still come up.

    Any suggestions??
     
  2. ST165-2765

    ST165-2765 Well-Known Member Donated!

    a code 54 can mean you have a low fluid level or it can mean your pump is not reading between 1.5 & 2.1 amps between pins 2 & 3

    your Turbo circuit
    [​IMG]

    the overall setup
    [​IMG]

    the two tests you can do
    [​IMG]
     
  3. nereik23

    nereik23 Well-Known Member

    Is this out of the Hanes manual? What book is this??
     
  4. lone wolf

    lone wolf Well-Known Member Donated!

    Those are the toyota workshop books. They can be accessed through the forums/site as well I believe.
     
  5. 4thgenceli

    4thgenceli Test Dummy

    Just use a resistor and trick it to think it's still there. Really though a code 54 won't do anything but stick you in low boost mode (limp mode).
     
  6. nereik23

    nereik23 Well-Known Member

    What size resistor would you think I should use? I cant seem to find any information of what the value of the actual sensor would have been to match it. I have a heap of them sitting around, should be able to come up with nearly any value. If I'm getting 54 the ECU goes into 'limp' mode? Are you serious, I thought it was a little sluggish when I took it on its test run.

    Also just to clarify everyone understands that the air cooler has been taken off, and I have no Top-Mount installed, its all been converted to front air cooled. So when you go to do this, you pretty much take all of this off

    [​IMG]

    And jump that inter-cooler level warning sensor and that's it right? Would there of been anything else altered besides this?

    The other thing is does anyone have a photo of what this plug looks like so I definatelty know I have the right one. I know it a 2 pin connector, and the one that needs to be bridged is a 2 pin connector, but some that I have seen, seem to be a bit big and rounder and sometimes grey, where mine is pretty much a small long oval shape plug which is blue. Ill take some photo's of everything tonight, just got a heap of goodies from repco yesterday to install also :D

    (ON a side note:) Went to Pedders to get all the suspension checked out. After all I did install it myself, just to make sure everything was safe. I did change the front suspension and did the conversion from 165 to 185 so I could get a little more choice in what aftermarket suspension I get in the future.

    So came out of their 28 point check with:

    [*]Bump stop (FRONT) - both damaged.


    [*]sway bar & bushes both oil soaked and splitting


    [*]steering gear RH boot split


    [*]CV Joints RH outer boot has a small hole


    [*]No Bump Stops @ REAR (But pretty sure there shouldn't be any there anyways?)

    As well as that I'm pretty sure I have a warped front rotar as well, so see if I can get that turned at the engineers place if its not too badly out.. Crossing fingers.


    [FONT=Verdana, Tahoma, Geneva, sans-serif]But back to my initial topic, I'll take some photos and even a video to show what I'm dealing with setup wise. Thanks again for every ones help! [/FONT]
     
  7. ST165-2765

    ST165-2765 Well-Known Member Donated!

    Your code 54 is being created because you don't have an intercooler water pump hooked up and the intercooler ECU
    knows theirs no resistance between pins 2 & 3.

    V=I*R (voltage = current * resistance)
    R= V/I
    R=12volts / 1.5 amps
    R= 8 ohms

    R=12volts / 2.1 amps
    R= 5.7 ohms

    You need a resistor between 5.7 & 8 ohms. It needs to be attached to the plug that went to your
    pump pins 2 & 3. Your code 54 is telling you that the pump is not running.

    For the fluid level just leave that plug unconnected pin 6, if you ground pin 6 it will also give you a code 54.

    [​IMG]
     

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