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U0002 and U110A only codes but still tons of issues

Discussion in 'Wrangler JK (2007-2017)' started by bigtuten1, Sep 2, 2021.

  1. Sep 2, 2021 at 2:52 PM
    #1
    bigtuten1

    bigtuten1 [OP] New Member

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    I’m stuck. Been working on this Jeep for a while now. It only throws two codes U110A (steering control module) and U0002. (Control Module). But I’m having so many other issues.
    1.A/C blower cuts out
    2 radio cuts out
    3 windows stop working
    4 won’t start
    5 gear indicators all light up
    6 clicking noise from trans tunnel area
    7 keyless entry doesn’t work
    8 alarm goes off
    9 traction control light comes on
    10 Security light comes on
    11 Tpms light comes on
    12 and last but not least it will not shift out of the current gear.

    these things only happen intermittently and sometimes won’t happen for days. I’ve replaced the TIPM and it was better for about a month but still happened. And when the Jeep sits for a while sometimes it’s fine after 5 minutes and other times it won’t start for hours. Today it’s been 8 hours. Replaced the starter relays, ignition module. The wiring harness (can bus) looks ok. Don’t see any obvious signs of wear or shorting out. Any help or ideas would be greatly appreciated.
     
  2. Sep 2, 2021 at 4:06 PM
    #2
    LYFZGOOD

    LYFZGOOD members

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    1998 Jeep Wrangler Sahara
    2.5” lift 32x11.50x15,cold air intake, Smittybuilt stainless steel Bumpers, rough county pocket flares,Rugged ridge seat covers and floor mats. Conversion LED headlights 20’ LED Light bar hardtop,soft top,bikini top.
    Wow what a mess. I would drive it to the worst side of town and leave the keys in it and the door open :boink:
     
    aggrex likes this.
  3. Sep 3, 2021 at 9:27 AM
    #3
    Awrench

    Awrench Well-Known Member

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    Where did you get tose code descriptions? fire them.

    My first thoughts -
    >> What did you do - is jeep modified, added ANYTHING, Anything to add?
    History - purchased from seller in Louisanna? Accident ?
    >> IIRC the TIPM has to be configured - yes it was done?
    Did you check for TSB's?


    U0002 : High Speed CAN Communication Bus Performance
    U110A : LOST COMMUNICATION WITH SCM (SAS)
     
  4. Sep 3, 2021 at 10:30 AM
    #4
    bigtuten1

    bigtuten1 [OP] New Member

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    Nothing has been changed from stock other than a more aggressive tire stock size. Purchased 3 years ago from a dealership in Missouri. No accidents. Car was registered in Missouri since purchased new. Tipm was configured.
     
  5. Sep 3, 2021 at 11:03 AM
    #5
    Awrench

    Awrench Well-Known Member

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    seeing communication codes- a scanner will be needed.
    I looked fr TSB's for those codes - nothing I could see as related.

    The differance between your description of code meaning and jeeps might have you changing direction of diagnostics.

    Do you have trouble trees for those codes?
     
  6. Sep 3, 2021 at 11:14 AM
    #6
    bigtuten1

    bigtuten1 [OP] New Member

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    I do not. Where can I get them?
     
  7. Sep 3, 2021 at 12:26 PM
    #7
    Awrench

    Awrench Well-Known Member

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    Why are you working this - not exactly a laymans type repair.

    Do you have a SCANNER - not a code reader? Something that wil communicate with the bus and the modules?

    Let me do a quick search for 2012 wrangler unlimited - (NOT a rubicon?) and those codes, no other codes is there?
     
    Groundfault likes this.
  8. Sep 4, 2021 at 10:20 AM
    #8
    Groundfault

    Groundfault Well-Known Member

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    5.7 V8 with Whipple Supercharger, TH350 w/B&M Shifter, NP205 TC, Dana 60 front 4.56, GM 14 bolt 10.5 rear 4.56, 4 wheel discs, Bilstein shocks, 6" lift on 37's, Autometer gauges, all led lighting and a few other things.
    I agree with Awrench. If you only have a code reader and not a scanner, it'll be almost impossible to isolate the problem. PCM/TCM, SCCM wiring harness connectors, ground faults, bad modules. You'll spend weeks taking stuff apart with the unlikely possibility that you'll find something obvious.
    Only simple things you can do are to check battery voltage, terminals all grounding points and check all of your fuses. If it all looks good, you'll probably have to take it to someone to have it scanned.
     
  9. Sep 4, 2021 at 10:26 AM
    #9
    bigtuten1

    bigtuten1 [OP] New Member

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    Thanks for the help guys. I found my local shop has the Chrysler tool to make the diagnosis. He’s a couple days behind but I will let you all know the outcome. His first initial impression was PCM was shot and would probably need replaced. But I’ll let you know
     
  10. Sep 4, 2021 at 11:00 AM
    #10
    Awrench

    Awrench Well-Known Member

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    Sorry I could NOT copy the entire trouble tree, but the shop will have it - something for you to study... let me know the progress, diagnoisis etc.
    top is U0002
    lower is U110A


    u0002.jpg
    U110A.jpg
     

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