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Thread: My new IID tool and the faults I've found - and what do they mean?

  1. #1
    Homestar's Avatar
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    My new IID tool and the faults I've found - and what do they mean?

    So, just got my hands on my new GAP diagnostics IID tool. What a great bit of kit - been playing for the last hour with it.

    Now, the reason I bought it was to clear the EAS faults I had, and confirm that the flat front right air bag was faulty. Well, after reading the faults (in the EAS), I only got 64 - ARTICULATION VALIDITY FAULT and nothing else. I reset the fault, and to my surprise the FR air bag inflated! - Great.... BUT, when I went for a drive the AIR SUSPENSION INACTIVE came up again after a couple of corners and it is the same fault - I am guessing an intermitant fault with a wheel height sensor???

    When I clear the fault, the suspension goes up and down as it should, and when you view the wheel heights using the IID tool, they all show that they are changing, although they aren't even - is this normal???

    Any advise, ideas or opinions would be appreciated, as I know it isn't the air bag itself now, but not sure exactly what it may be...

    I also had 18 other faults that I cleared, but I'm not sure of what half of them were.

    Cheers - Gav
    If you need to contact me please email homestarrunnerau@gmail.com - thanks - Gav.

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    Gav
    Not sure but your compressor may need a re-build kit. Sounds familiar to some I've seen on Fullfatr

    Also here is a link to a comprehensive list of the fault codes.

    TroubleCodes.net- engine & OBD2 Trouble Codes and Technical info & Tool Store.

    Laurie

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    Thanks Laurie, but the compressor is almost brand new, and punching out 188PSI. The car goes up and down quite fast. I've been reading some stuff on other forums, and the majority seem to point towards the wheel height sensor, which is what I first thought, but I am wondering now how to confirm this. Mind you at $36 it ain't gunna kill me if I go out an buy one...

    Nice list of fault codes - I have been looking for something like that.

    Cheers - Gav
    If you need to contact me please email homestarrunnerau@gmail.com - thanks - Gav.

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    ARTICULATION VALIDITY FAULT = the ECU thinks - "A height sensor has indicated that the suspension has moved to a position that should be mechanically impossible."

    Essentially this is one of the analogue problems I referred to in another thread, the ECU is receiving a voltage from that sensor that is well out of range. This may be very intermittent as either there is a bad connection or short in the loom or the semiconductor material in the sensor is breaking down. Check connectors then replace height sensor. Question is where is the voltage going? If it is over voltage it is the sensor for sure (unless a small short in loom) - under voltage (more likely) is either sensor or connector.

    Laurie's list is only for OBD2 standard codes. Remember LR only followed the standard for the Engine ECU.

    Gav, your IID has paid for its self already.
    L322 3.6TDv8 Lux

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    Quote Originally Posted by harlie View Post

    Gav, your IID has paid for its self already.
    Absolutely! I'm one happy chappy at the moment. About to go and play a bit more and see if I can narrow it down.

    Cheers - Gav
    If you need to contact me please email homestarrunnerau@gmail.com - thanks - Gav.

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    Well, definately strange figures coming from the front RH sensor - it is way out compared to the others, and had a couple of odd figures while going up and down, so I think I'll bung a new sensor in there, and do a calibration of the system and see where that gets me.
    If you need to contact me please email homestarrunnerau@gmail.com - thanks - Gav.

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    Can you swap the sensors from side to side as per the P38... just a thought to confirm dud sensor... cheers
    MY99 RR P38 HSE 4.6 (Thor) gone (to Tasmania)
    2020 Subaru Impreza S ('SWMBO's Express' )
    2023 Ineos Grenadier Trialmaster (diesel)

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    Quote Originally Posted by Hoges View Post
    Can you swap the sensors from side to side as per the P38... just a thought to confirm dud sensor... cheers
    Good thought, but there are different part numbers for each side - I have had a look though, and that could be just a different bracket - not sure. They aren't expensive anyway - even in Aus, only $85 - I can get one landed from Old Blighty for about $55 - ($36 plus postage), but not going to bother for that amount.

    Cheers - Gav
    If you need to contact me please email homestarrunnerau@gmail.com - thanks - Gav.

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    Quote Originally Posted by bacicat2000 View Post
    .....
    and had a couple of odd figures while going up and down,
    .....
    Well done Gav.

    This would make me believe it is the sensor too. It will be a really odd figure that will trigger the inactive faults. A loom problem would be more likely with road vibration ect, and I would expect it to appear normal most of the time with the odd huge variation.

    Can you take the sensor arm off the suspension component and move it by hand, simulate road bumps.
    L322 3.6TDv8 Lux

  10. #10
    zedcars Guest
    Just a point.
    On L322's can bus errors, erroneous codes and junk in programs can affect sub systems.

    I have found that the air suspension can best be described as a sub system of the abs system when looking for faults which is higher up in the command chain.

    Go to the ABS system and check for can bus faults and erroneous codes, clear it our with your scanner then go to the EAS and recheck for faults. Sometimes they are often eliminated when the ABS is working properly.

    Just a thought.
    Dennis
    zedcars

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