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Starting issue Cascadia 2014

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by A gear per tire, Sep 13, 2021.

  1. Sep 13, 2021 #1
    A gear per tire

    A gear per tire Bobtail Member

    40
    10
    Jan 26, 2019
    0
    I have a starting issue with a Cascadia, the starter was replaced, I checked the wiring in the Powertrain harness from MCM 21pin connector to starter and thermistor switch in between. By passed that switch at the starter but it is still the same. The starter sounds like ut engages for a second then cuts off internal Sam Cab relay clicks. Also checked wiring from sam cab connector X19 pin 3 to the powertrain harness and its also fine. Anyone got a similar issue? Checked the clutch switch and its also working good.
     
    A gear per tire, Sep 13, 2021
    A gear per tire, Sep 13, 2021
    #1
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  3. Sep 13, 2021 #2
    Ross_Tech

    Ross_Tech Light Load Member

    133
    134
    Aug 31, 2021
    Michigan
    0
    Obviously check your battery and connections first, but also there used to be a problem on Cascadia's where the VSS was too sensitive, and during cranking the MCM would see a vehicle speed and disengage the starter. If you have access to Diagnostic Link you can check in there, as well as all the other starter interlocks.
     
    Ross_Tech, Sep 13, 2021
    Ross_Tech, Sep 13, 2021
    #2
  4. Sep 20, 2021 #3
    A gear per tire

    A gear per tire Bobtail Member

    40
    10
    Jan 26, 2019
    0
    Will check, ty there is a problem that i noticed. A fault relating to CAN communication between mcm cpc and acm. Also batteries were checked and there was a ground to the back of the starter that was not connected. Installed the ground and it still did the same.
     
    A gear per tire, Sep 20, 2021
    A gear per tire, Sep 20, 2021
    #3
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