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Thread: JZX90 Cruise Control Limit.

  1. #1
    Junior Member 1st year Apprentice
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    Default JZX90 Cruise Control Limit.

    Have searched this forum and found that the circuit boards for Soarer and Celsior have the facility to either bridge or unbridge the limit of 108K.

    My JZX90 MarkII board is similar in layout to the Soarer, it has the same connector size and pin arrangement but there is no obvious facility to override the 108K limit.

    The attached boards illustrate what I mean. Can anyone help?

  2. #2
    Junior Member Grease Monkey ripfast's Avatar
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    Default Re: JZX90 Cruise Control Limit.

    try plugging a soarer one in
    1985 VK Commodore with 1JZ-GTE
    1989 GZ20 GT-T Soarer with 1G-GTE
    2008 IS250 with not enough power

  3. #3
    Senior Citizen Chief Engine Builder "Z" UTE's Avatar
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    Default Re: JZX90 Cruise Control Limit.

    Arthur, I have done the cruise control mod, on both Soarer, and Celsior.
    If your board is the same as the Soarer, solder a bridge between 2 terminals
    The Celsior, is even simpler, cut 1 wire.

    For pictures, and tutorials, on both, visit: www.soarercentral.com.au

    cheers Chuck.
    "What man can build, man can fix!"
    MS51Crown Coupe,
    GSV40R Aurion luxo tourer. One TA22 currently receiving some TLC prior to paint One RS56 Crown ute under construction, 2 x TA22's awaiting rebuilds. Toyota Crown RS47J ute in need of serious TLC. Toyota Crown Custom Wagon MS53 daily hauler stocko!

  4. #4
    Junior Member 1st year Apprentice
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    Default Re: JZX90 Cruise Control Limit.

    Thanks for the two replies. I have looked at both boards mentioned and the mods are as you say quite simple.

    Just as luck would have it my board is different to both Soarer and Celsior boards. There is no provision to cut or insert a bridge.

    The pin layout of the JZX90 board is the same as the Soarer but have been told that the pin usage is different. The Soarer socket that accepts the plug is also slightly different.

    If anyone has a wiring diagram for a JZX90 cruise control I could compare it to the Soarer and possibly rearrange the pin layout to achieve some compatability.

    Have not given up yet but still need help.

  5. #5
    Junior Member 1st year Apprentice
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    Default Re: JZX90 Cruise Control Limit.

    One of the moderators has a sense of humour. I might have been a first year apprentice 40 years ago. How does retired aircraft engineer sound instead?

  6. #6
    Senior Citizen Chief Engine Builder "Z" UTE's Avatar
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    Default Re: JZX90 Cruise Control Limit.

    Quote Originally Posted by Arthur
    One of the moderators has a sense of humour. I might have been a first year apprentice 40 years ago. How does retired aircraft engineer sound instead?

    Arthur, we all start on these forums as 1st year apprentice. Automatically generated !!

    Where did you do your engineer training?


    cheers Chuck.
    "What man can build, man can fix!"
    MS51Crown Coupe,
    GSV40R Aurion luxo tourer. One TA22 currently receiving some TLC prior to paint One RS56 Crown ute under construction, 2 x TA22's awaiting rebuilds. Toyota Crown RS47J ute in need of serious TLC. Toyota Crown Custom Wagon MS53 daily hauler stocko!

  7. #7
    Junior Member 1st year Apprentice
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    Default Re: JZX90 Cruise Control Limit.

    Queensland and Northern Territory Aerial Services. The programme wouldn't accept just "Qantas".

  8. #8
    Senior Citizen Chief Engine Builder "Z" UTE's Avatar
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    Default Re: JZX90 Cruise Control Limit.

    Good stuff Arthur.

    Was the xxx90 series sold to the USA, or any country other than Japan.?
    Japan, is the only place where that cruise restriction of 108kph is law, so source a cruise control computer from OS other than Japan..


    cheers Chuck.
    "What man can build, man can fix!"
    MS51Crown Coupe,
    GSV40R Aurion luxo tourer. One TA22 currently receiving some TLC prior to paint One RS56 Crown ute under construction, 2 x TA22's awaiting rebuilds. Toyota Crown RS47J ute in need of serious TLC. Toyota Crown Custom Wagon MS53 daily hauler stocko!

  9. #9
    Junior Member 1st year Apprentice
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    Default Re: JZX90 Cruise Control Limit.

    JZX90/100's were the offerings to a pampered local market only so it would appear my best option is to modify a Soarer circuit board as the operating mechanism is the same. It will come down to whether the JZX90 computer recognises the Soarer board.

  10. #10
    Sucks to be a Domestic Engineer YelloRolla's Avatar
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    Default Re: JZX90 Cruise Control Limit.

    Quote Originally Posted by Arthur
    Queensland and Northern Territory Aerial Services. The programme wouldn't accept just "Qantas".
    needs minimum of 10 characters to register as a reply.
    YelloRolla's KE20 1/4mi = 11.32 @ 119mph @ 22psi on slicks
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