CST activates on the hwy. | FerrariChat
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CST activates on the hwy.

Discussion in '360/430' started by Thepenman, Jan 26, 2024.

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  1. Thepenman

    Thepenman Rookie

    May 7, 2014
    12
    Miami FL
    Full Name:
    Jonathan Penner
    #1 Thepenman, Jan 26, 2024
    Hi all. Long time no chat. New issue. CST light and system activates on the highway going straight. It cuts the power at hwy speeds. Not cool. We think it’s a bad module. Agreed? When the computer was connected to the car. The e diff fault came up.
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  2. flash32

    flash32 F1 Veteran

    Aug 22, 2008
    6,939
    Central NJ
    Full Name:
    Dominick
    #2 flash32, Jan 27, 2024
    I would say it may be a pressure issue that causing low pressure at times to the ediff thus causing the error
    Here are some timings you should do

    Key on engine off ..with a stopwatch how long does pump run and stay off ..do multiple times
    How.many shifts so you get 1 to n to 1 with key on engine off before pump activates
    So the same with engine running
    Drive at 25 straight and tell me how freq pump goes on

    A diag tool connected to monitor circuit pressure is easier for when the car is running to time off times
     

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