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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 4 of 5
  1. Aug 23, 2021 #31
    truckin24

    truckin24 Bobtail Member

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    Sep 1, 2019
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    you are right i was wrong. it's neutral. slept a few times since i've driven it!
     
    truckin24, Aug 23, 2021
    truckin24, Aug 23, 2021
    #31
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  3. Aug 25, 2021 #32
    biopure22

    biopure22 Light Load Member

    87
    51
    Aug 22, 2021
    0
    any luck?
     
    biopure22, Aug 25, 2021
    biopure22, Aug 25, 2021
    #32
  4. Aug 25, 2021 #33
    RocketyMan

    RocketyMan Medium Load Member

    527
    309
    Jun 5, 2015
    0
    Sorry, I forgot to report back to the PM on this issue.

    The TCU is located on the left side of the transmission:
    upload_2021-8-25_13-27-15.png

    The 30 amp fuse is the supply to the TCU that needs to be checked:

    upload_2021-8-25_13-28-12.png

    Disconnect the connector to the TCU and verify any water intrusion and also determine if that circuit is a short to ground (with batteries disconnected). Pin 38 to on the TCU is the batt supply. DO NOT poke and prod the pin on the TCU connector--use something that won't compromise the pin. Be careful!


    One thing that I need to reiterate, is that when verifying the J1939, you need to make sure the batteries are DISCONNECTED in order to statically test the terminating resistors. With both 120 ohm terminating resistors installed, you should see a value of roughly 60 ohms--with batteries DISCONNECTED.

    The majority of the concern here seems to be on the DRIVER side of the Powertrain:
    upload_2021-8-25_13-36-31.png
     

    Attached Files:

    RocketyMan, Aug 25, 2021
    RocketyMan, Aug 25, 2021
    #33
    biopure22 and QUALITYTRUCK Thank this.
  5. Aug 28, 2021 #34
    truckin24

    truckin24 Bobtail Member

    32
    8
    Sep 1, 2019
    0
    Sorry for the slow reply. Have been tied down with other stuff and didn't get to work on it until today. OHMs read 62 touching pin c and d. Looked all under truck and didn't see any places where wires were rubbing or anything. I am at a loss and going to have to call a professional truck mechanic I guess. Thanks all for the help and I will post back when I find out what it is!
     
    truckin24, Aug 28, 2021
    truckin24, Aug 28, 2021
    #34
    biopure22 Thanks this.
  7. Aug 30, 2021 #35
    biopure22

    biopure22 Light Load Member

    87
    51
    Aug 22, 2021
    0
    ah man dang..:(..no worries bro,i appriciate you keeping me updated,i really want to know now since its not what i thought,i hope you get it figured out!
     
    biopure22, Aug 30, 2021
    biopure22, Aug 30, 2021
    #35
    truckin24 Thanks this.
  8. Sep 9, 2021 #36
    truckin24

    truckin24 Bobtail Member

    32
    8
    Sep 1, 2019
    0
    Sorry for the slow update. Didn't have any updates until today. Got it towed last week. Guy at the shop was in a hurry today on the phone but said it was something with the transmission sending unit? Or control module? Whatever it was he said it's an easy fix but expensive and he doesn't know how easy/quick he can get the part. he's going to call back when he gets time and I'll get clarification.

    Hoping I didn't mess it up by having the battery charger on it trying to get it started. I'll feel like an idiot. Can't imagine it wouldn't have something built into it like a fuse that would blow. I almost feel like that would be it since it was fine when it was parked 6 months ago and then batteries were dead and I tried to jump it and no dice.

    Thanks all for the help you are great people!
     
    truckin24, Sep 9, 2021
    truckin24, Sep 9, 2021
    #36
    biopure22, flood and stuckinthemud Thank this.
  9. Sep 10, 2021 #37
    truckin24

    truckin24 Bobtail Member

    32
    8
    Sep 1, 2019
    0
    Went to the shop today and transmission computer apparently is bad. Can’t believe it but I guess it’s $2500 for a new one. Is it often these just go bad? Ugh. Any place to buy reman or off a salvage truck? Thanks guys.
     

    Attached Files:

    truckin24, Sep 10, 2021
    truckin24, Sep 10, 2021
    #37
  10. Sep 10, 2021 #38
    biopure22

    biopure22 Light Load Member

    87
    51
    Aug 22, 2021
    0
    #### ☹️
     
    biopure22, Sep 10, 2021
    biopure22, Sep 10, 2021
    #38
  11. Apr 1, 2022 #40
    Bwasz

    Bwasz Bobtail Member

    1
    0
    Apr 1, 2022
    0
    Did you end up getting the part? If so did it fix it? We have the SAME issue right now.
     
    Last edited: Apr 2, 2022
    Bwasz, Apr 1, 2022
    Bwasz, Apr 1, 2022
    #40
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