1. Welcome to Jeeps.net!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Jeep discussion topics
    • Transfer over your build thread from a different forum to this one
    • Communicate privately with other Jeep owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

DTC 93 ZJ

Discussion in 'Grand Cherokee' started by TinyInkognegroT, Oct 9, 2019.

  1. Oct 9, 2019 at 6:45 PM
    #1
    TinyInkognegroT

    TinyInkognegroT [OP] Well-Known Member

    Joined:
    May 26, 2019
    Member:
    #3261
    Messages:
    533
    Gender:
    Male
    Vehicle:
    1993 Grand Cherokee Limited 5.2L AWD
    Here are the new codes...
    12 - Direct battery input to PCM was disconnected within the last 50 Key-on cycles.

    45 - Overdrive solenoid - open or shorted condition detected in overdrive solenoid circuit.

    37 - An open or shorted condition detected in the torque converter part throttle unlock solenoid control circuit. (3 speed auto RH trans. Only). Incorrect input state detected for the Park/Neutral switch. Auto. only.

    51 - A lean air/fuel mixture has been indicated by an abnormally rich correction factor. (O2 sensor)
     
  2. Oct 10, 2019 at 6:16 AM
    #2
    Awrench

    Awrench Well-Known Member

    Joined:
    May 12, 2018
    Member:
    #2303
    Messages:
    889
    Gender:
    Male
    Vehicle:
    3 jeeps
    what do you want to know, what can we add?
     
    TinyInkognegroT [OP] likes this.
  3. Oct 10, 2019 at 7:16 AM
    #3
    TinyInkognegroT

    TinyInkognegroT [OP] Well-Known Member

    Joined:
    May 26, 2019
    Member:
    #3261
    Messages:
    533
    Gender:
    Male
    Vehicle:
    1993 Grand Cherokee Limited 5.2L AWD
    More curious about code 37 than anything,
    Code 37 is new and I'm not understanding what it means and what to look for. Except that it does seem like my torque converter is locked or doesn't unlock at high speeds on the highway
     
  4. Oct 10, 2019 at 10:02 AM
    #4
    Awrench

    Awrench Well-Known Member

    Joined:
    May 12, 2018
    Member:
    #2303
    Messages:
    889
    Gender:
    Male
    Vehicle:
    3 jeeps
    this is a 46RH trans - the code 37 makes sense with accompanying 45 as these are the "electrical" portion of the trans - and I suspect they have NO voltage. A fuse, elec connector, OD switch or wiring.

    Good news
    I suspect your 4th gear and TCC are inoperative At this time, as if they were functioning you would have trans issues.


    Bad news
    these old POS ZJ's are the old chrysler shop manuals, I would rather have a prostate exam than look for a limited model (5.2L) wiring diagram. I will get it for you -its a jeep thing. I Will add later.

    37.jpg
     
  5. Oct 10, 2019 at 11:23 AM
    #5
    Awrench

    Awrench Well-Known Member

    Joined:
    May 12, 2018
    Member:
    #2303
    Messages:
    889
    Gender:
    Male
    Vehicle:
    3 jeeps
    next at transmission a 3 wire connector, is it plugged in, tight secure, with key on is there 12v on center wire LB wire (Light Blue)
     
    TinyInkognegroT [OP] likes this.
  6. Oct 10, 2019 at 12:48 PM
    #6
    Awrench

    Awrench Well-Known Member

    Joined:
    May 12, 2018
    Member:
    #2303
    Messages:
    889
    Gender:
    Male
    Vehicle:
    3 jeeps
    as mentioned at left rear of trans - match the connector in diagram with what you have...


    I bottle Pappy Van Winkle’s Family Reserve Bourbon 15 Year Old should do it.
     

    Attached Files:

    TinyInkognegroT [OP] likes this.
  7. Oct 19, 2019 at 1:29 PM
    #7
    TinyInkognegroT

    TinyInkognegroT [OP] Well-Known Member

    Joined:
    May 26, 2019
    Member:
    #3261
    Messages:
    533
    Gender:
    Male
    Vehicle:
    1993 Grand Cherokee Limited 5.2L AWD
    I've got all the codes to clear except for 51. How can I troubleshoot and fix trouble code 51? 51 is a lean mixture of air and fuel
     
  8. Oct 19, 2019 at 1:44 PM
    #8
    Awrench

    Awrench Well-Known Member

    Joined:
    May 12, 2018
    Member:
    #2303
    Messages:
    889
    Gender:
    Male
    Vehicle:
    3 jeeps
    look for a vacuum leak, check fuel pressure with a gauge as a bad pump will force fuel trim ++ to comp fpr low pressure.

    Try the carb cleaner spray trick to find vac leaks- 5.2 check the valey pan gasket.
    Should be you tube tutorials on both - carb cleaner to find vac leaks, AND dodge 5.2 intake gasket leak
     
    TinyInkognegroT [OP] likes this.
  9. Oct 19, 2019 at 2:16 PM
    #9
    TinyInkognegroT

    TinyInkognegroT [OP] Well-Known Member

    Joined:
    May 26, 2019
    Member:
    #3261
    Messages:
    533
    Gender:
    Male
    Vehicle:
    1993 Grand Cherokee Limited 5.2L AWD
    Okay I'll do those things, what do you think about the map sensor being faulty? I read that the map sensor plays a big part in fuel-air mixture
     
  10. Oct 19, 2019 at 4:03 PM
    #10
    Awrench

    Awrench Well-Known Member

    Joined:
    May 12, 2018
    Member:
    #2303
    Messages:
    889
    Gender:
    Male
    Vehicle:
    3 jeeps
    there is no indicator or reason to suspect MAP.

    TPS checks MAP and MAP checks TPS - the 2 sensors react to the other sensor changing.
    A wot would see a decreasing manifold vac.
    A increasing MAP would expect to see a closed TPS.
     
    TinyInkognegroT [OP] likes this.
  11. Oct 20, 2019 at 6:35 AM
    #11
    TinyInkognegroT

    TinyInkognegroT [OP] Well-Known Member

    Joined:
    May 26, 2019
    Member:
    #3261
    Messages:
    533
    Gender:
    Male
    Vehicle:
    1993 Grand Cherokee Limited 5.2L AWD
    Like this ?
    https://youtu.be/mw_wYRER3gQ
     
  12. Oct 20, 2019 at 9:02 AM
    #12
    TinyInkognegroT

    TinyInkognegroT [OP] Well-Known Member

    Joined:
    May 26, 2019
    Member:
    #3261
    Messages:
    533
    Gender:
    Male
    Vehicle:
    1993 Grand Cherokee Limited 5.2L AWD
    He has a 5.9.The vacuum lines are different from the 5.2 and I can't find the same source of hoses that he's removing on my 5.2 to test the plenum
     
  13. Oct 21, 2019 at 3:57 AM
    #13
    TinyInkognegroT

    TinyInkognegroT [OP] Well-Known Member

    Joined:
    May 26, 2019
    Member:
    #3261
    Messages:
    533
    Gender:
    Male
    Vehicle:
    1993 Grand Cherokee Limited 5.2L AWD
    Except code 12, I have no more DTC codes
     
  14. Oct 21, 2019 at 4:44 AM
    #14
    Awrench

    Awrench Well-Known Member

    Joined:
    May 12, 2018
    Member:
    #2303
    Messages:
    889
    Gender:
    Male
    Vehicle:
    3 jeeps
    THE IDEA is to spray and listen for the change in engine sound -RPM or runing rough or smoothing out BUT you should clearly hear a change.

    Spray around vacuum lines, fittings, manifold mating surfaces, where inj plug into manifold, this is a general check of many areas not just manifold valley pan ie the 5.9L video.

    Lean condition also check exhaust leaks, fuel pressure, but I would first suspect vac leak.
     
To Top