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Thread: EAS ECU not responding

  1. 26th March 2015, 03:55 PM #1
    Keithy P38's Avatar
    Keithy P38
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    EAS ECU not responding

    Hey gurus!

    Got one that stumps me, maybe someone here has seen or heard of it before.

    I have been helping a mate out with EAS issues (it's electrical), can't read his ECU from my Nanocom for some reason. It reads all other ECU's no worries.

    I plugged it into my P38 and read/played with the EAS immediately. No dramas.

    Could it be the OBDII port? We pulled it down and cleaned the pins, made sure everything was connected to it, still no change.

    Could it be an issue with the delay timer relay? We tried two relays, both proven to work on my car beforehand with no change when plugged into his.

    ECU?
    ECU connector?
    Bad earth?

    Cheers
    Keithy
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  2. 26th March 2015, 03:57 PM #2
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    Scouse
    Scouse is offline OldBushie Gold Subscriber
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    It doesn't have that 'new' delay timer mod & has a normal relay fitted?
    IIRC, someone mentioned that the original relay is required for diagnostics.


    Failing that, I'd be checking the power supply to the ECU or swapping yours (or a spare) as a last resort.
    Scott
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  3. 26th March 2015, 04:30 PM #3
    Keithy P38's Avatar
    Keithy P38
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    It runs a normal delay timer relay. I have a yellow relay in mine, but ripped it out for testing.

    Other diagnostic tools cannot connect to his EAS either.

    Perhaps the OBDII plug needs to be replaced. Easier and cheaper than ECU swaps!

    Cheers
    Keithy
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  4. 26th March 2015, 05:39 PM #4
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    Scouse
    Scouse is offline OldBushie Gold Subscriber
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    Check the continuity between the diagnostic plug & the ECU.
    Pins 11(WLG) & 12(WK) go to the EAS ECU.
    Scott
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  5. 27th March 2015, 10:50 AM #5
    Keithy P38's Avatar
    Keithy P38
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    Cheers mate, will give it a shot!
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  6. 29th March 2015, 02:27 AM #6
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    BBS Guy
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    Keithy
    Although there are the 2 Data connections from the OBDII socket to the ECU already mentioned, Pin one (IIRC) of the OBDII is also used and forms a direct connection to the Timer relay to allow diagnostic equipment to control the power to the EAS ECU.

    This is required, as putting the EAS ECU into diagnostic communication mode can only be achieved in a very short time window after powering the EAS ECU up.

    So a lack of ability to control the power to to EAS ECU via the Timer relay and it's OBDII connection would result in an inability to talk to it diagnostically.

    I hope this helps

    Colin
    Colin
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    www.blackbox-solutions.com
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  7. 29th April 2015, 03:47 AM #7
    Keithy P38's Avatar
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    Just an update on this issue!

    We removed the seat and inspected the wiring to the ECU, turns out someone in the past may have had issues with this P38's suspension. I'm not sure how or why, but one of the wires going to the EAS ECU was exposed and shorting on the body every now and then. Believe it or not, the bright spark who tinkered with it had literally twisted the wires together, no electrical tape or solder, just a twist!

    We cut, replaced and soldered the wire and the suspension has been fantastic for over a week so far. I haven't tried to put my Nanocom over it as yet.

    Cheers
    Keithy
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