Results 1 to 4 of 4

Thread: more on Puma MY09 2.4 immobiliser

  1. #1
    Join Date
    Aug 2012
    Location
    Tewantin (NOOSA area)
    Posts
    636
    Total Downloaded
    0

    more on Puma MY09 2.4 immobiliser

    Following on from:


    https://www.aulro.com/afvb/90-110-130-defender-county/250541-2007-immobiliser-strikes-yet-again.html



    After about 3 yrs – since xfer case intermediate shaft re-bushing and rebuild I have not had a 10AS immobiliser issue. Unfortunately it has again raised its ugly head. On a tray to get it home, disconnect both plug on the module and leave it overnight, reconnect plugs in morning and “starts”! (Cranks)


    Using the awful LR circuit diagrams and using the appropriate connector numbers , another book! I managed to “pin out” the plugs and relate them to their respective wires and circuits.


    Long story – short, by following the various wires to sources and destinations I have nutted out that all the ECU does is to provide earth for the “start relay” This sort of concurs with some of my other (aftermarket) ECU computers. In the main they only complete many circuits by providing switching to an earth for signals from and to microprocessors , transistors and mosfets etc. Either on of off!


    In the puma 2.4 the immobiliser output is fed through the instrument panel and then to the ECU. If the ECU doesn’t get the correct signals it will not provide an earth for one leg of the start relay .


    However, the actual instrument panel doesn’t care and all the instruments, lights etc work. Sucker just won’t crank – that is the actual immobilising function. No crank no start!

    As far as I am aware there is no fuel cut off immobiliser function, apart from the “shutdown” from the ECU when keyed to “off” and it switches off the injectors.


    So, thinks if one were to provide a separate switchable earth path for the Start Relay to ECU line the 2.4 will crank, and if he cranks he will start.

    A get home mode??? One would still need to pull the plugs off of the immobiliser module, wait, and replace to get back all of the other related functions, door locks etc.

    Comments thoughts suggestions????

    Cheers

    Rick F

  2. #2
    Join Date
    Feb 2007
    Location
    Yass NSW
    Posts
    5,551
    Total Downloaded
    0
    I'd be sorely tempted to just wire the immobiliser circuit to earth, maybe with a relay and a hidden switch for immobilisation.

    Regards,
    Tote
    Go home, your igloo is on fire....
    2014 Chile Red L494 RRS Autobiography Supercharged
    MY2016 Aintree Green Defender 130 Cab Chassis
    1957 Series 1 107 ute - In pieces

    Assorted Falcons and Jeeps.....

  3. #3
    Join Date
    Dec 2014
    Location
    Brisbane
    Posts
    203
    Total Downloaded
    0
    I’d love to hear how you go with this.

  4. #4
    Join Date
    Aug 2012
    Location
    Tewantin (NOOSA area)
    Posts
    636
    Total Downloaded
    0
    Will let yooz all know, still have one final fling with switching he sucker off with the T4 box. A few weeks yet

    Cheers

    RF

Tags for this Thread

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Search AULRO.com ONLY!
Search All the Web!