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No start. 2014 Cascadia. Ultrashift. J1939 No trans code on dash. Fuse? Please help.

Discussion in 'Freightliner Forum' started by truckin24, Aug 16, 2021.

Page 1 of 5
  1. Aug 16, 2021 #1
    truckin24

    truckin24 Bobtail Member

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    Have a 2014 Cascadia with ISX and a ultrashift that gets used seasonally. Went to start it a week ago and it was 100% dead. Tossed the charger on it for a few hours turned key on and not enough juice to start but no code. Charged a few more times and no dice and then the J1939 code No trans showed up. So it wouldn't even try to crank. Pulled the batteries and they were only 2 years old and they tested so low they said it almost has to have a drain or a short. Hooked up the new batteries with the hot cables and then checked with a test light and sure enough there is a short. Not sure where to go from here? Any ideas?
     
    truckin24, Aug 16, 2021
    truckin24, Aug 16, 2021
    #1
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  3. Aug 17, 2021 #2
    Judge

    Judge Road Train Member

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    The J1939 terminating resistor is located behind the radio near the windshield.

    50E7CB7A-398B-4889-B792-1EC154050CC8.jpeg

     
    Judge, Aug 17, 2021
    Judge, Aug 17, 2021
    #2
    biopure22 Thanks this.
  4. Aug 17, 2021 #3
    truckin24

    truckin24 Bobtail Member

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    Thanks for the reply. I wonder if "no trans" means it's not detecting the transmission. Or does that mean its transmitting info with that J1939 resistor?
     
    truckin24, Aug 17, 2021
    truckin24, Aug 17, 2021
    #3
  5. Aug 17, 2021 #4
    Judge

    Judge Road Train Member

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    I’d say it’s not transmitting, no transmission wouldn’t keep it from starting
     
    Judge, Aug 17, 2021
    Judge, Aug 17, 2021
    #4
    biopure22 Thanks this.
  7. Aug 17, 2021 #5
    truckin24

    truckin24 Bobtail Member

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    Well I did a little more digging and found a blown 30 amp fuse under the hood. It's labled as "TCU, BAT". Popped in a new fuse and it blew as soon as I put it in. Hoping someone here can help me out it's dead in the water right now and can't even get it to the shop. Hoping it's an easy fix but I can't find what is shorting and causing the blown fuse.
     
    truckin24, Aug 17, 2021
    truckin24, Aug 17, 2021
    #5
  8. Aug 18, 2021 #6
    QUALITYTRUCK

    QUALITYTRUCK Road Train Member

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    Power supply to transmission TCM may be rubbing on metal. TCM bolted to driver side of transmission. Will have 2 square plugs that look identical. Try to concentrate on harness towards front of truck. Cut zip ties, open split loom and observe. Warning. It will probably be a tight squeeze to fit up in there to do all of this.
     
    QUALITYTRUCK, Aug 18, 2021
    QUALITYTRUCK, Aug 18, 2021
    #6
  9. Aug 18, 2021 #7
    flood

    flood Road Train Member

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    no trans will keep it from starting.... the ecm must get a signal from the trans (trans in neutral for safety) before it will alow it to start

    Like a neutral safety switch on a car
     
    Last edited: Aug 18, 2021
    flood, Aug 18, 2021
    flood, Aug 18, 2021
    #7
    RocketyMan Thanks this.
  10. Aug 18, 2021 #8
    Judge

    Judge Road Train Member

    13,468
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    hm, never had an issue with that, most my vehicles never had that, new pickup will but no issues there, hadn’t thought of neutral switch
     
    Judge, Aug 18, 2021
    Judge, Aug 18, 2021
    #8
  11. Aug 18, 2021 #9
    flood

    flood Road Train Member

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    Every auto car/pu I've had newer then 1970 has required it be in N or P to start... even the standard 3,4 & 5 speeds required the clutch be pressed to start..
     
    flood, Aug 18, 2021
    flood, Aug 18, 2021
    #9
    RocketyMan Thanks this.
  12. Aug 19, 2021 #10
    RocketyMan

    RocketyMan Medium Load Member

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    I suspect water in a harness connector causing the fuse to blow immediately and also a short to GND somewhere like what was mentioned earlier.

    If you can supply last 6 of vin, I can point towards what circuits on the PDM and where to check.
     
    RocketyMan, Aug 19, 2021
    RocketyMan, Aug 19, 2021
    #10
    truckin24 Thanks this.
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