No crank on Frieghtliner Cascadia 2016

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by myfuture, Jun 6, 2020.

  1. myfuture

    myfuture Bobtail Member

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    Jun 6, 2020
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    Hello,

    The starter motor on my 2016 Cascadia Automatic Transmission does not crank. There is no power coming to the magnetic switch. Starter motor itself is good. I tested the motor by supplying 12 volts to the magnetic switch. What else should I check? The neutral position sensor? Where is located and how do I check it?
     
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  3. Rideandrepair

    Rideandrepair Road Train Member

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    Check the wires going to the relay/selinoid, it should be on firewall, between steering column, and wiper motor.
     
  4. uncleal13

    uncleal13 Road Train Member

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    Cascadia relay is located on the starter on top of the solenoid. It’s called an IMS, integrated magnetic switch.
     
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  5. uncleal13

    uncleal13 Road Train Member

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    The starter also has an OCP over crank protection (thermo over heat) switch located on the end of the starter motor facing the front of the truck.
    The start signal from the MCU goes to the OCP switch first, then the IMS relay on top of the starter, which then triggers the starter solenoid.
     
  6. mixingconcrete

    mixingconcrete Light Load Member

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    Apr 14, 2019
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    Look on the starter and see if you can spot a plug going into it, it has 2 wires. Make sure it is plugged in and those wires not damaged. It is the overcrank protector. If those wires are not plugged in or damaged then the truck wont start. We had this problem once due to a damaged wire that rubbed on the frame.
     
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  7. Motto

    Motto Light Load Member

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    Apr 10, 2020
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    There are few lockup features that will prevent starter to go on. Your truck has auto trans and i dont know what can prevent starter to start. I would go to place who has diagnosticlink software. Diagnosticlink has a routine that shows why starter is not coming on.
     
    Last edited: Jun 8, 2020
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