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93 5.2 Throttle Sensors

Discussion in 'Cherokee' started by TinyInkognegroT, Oct 19, 2019.

  1. Oct 19, 2019 at 1:27 PM
    #1
    TinyInkognegroT

    TinyInkognegroT [OP] Well-Known Member

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    What is the names of these three sensors on the throttle body... And what they are used for? I've tested all three of them with a multimeter with the key turned on and I'm getting no voltages from any wire
     

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  2. Oct 19, 2019 at 3:39 PM
    #2
    Awrench

    Awrench Well-Known Member

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    1) MAP sensor vac sensor
    2) TPS throttle position sensor
    3) IAC Idle Air controller - controls idle RPM

    throttle body.jpg
     
  3. Oct 19, 2019 at 3:52 PM
    #3
    Awrench

    Awrench Well-Known Member

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    with KOEO VT/WT wire is 5v referance on MAP and TPS.

    The IAC will not always have 12v
     

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  4. Oct 20, 2019 at 6:20 AM
    #4
    TinyInkognegroT

    TinyInkognegroT [OP] Well-Known Member

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    So I'm not supposed to get voltages from the TPS wires or the map wires?
     
  5. Oct 20, 2019 at 9:46 AM
    #5
    Awrench

    Awrench Well-Known Member

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    yes the system will have voltage on the MAP and TPS, the wiring diagram shows which wires.

    KOEO there will be a 5v referance and a signal return.
    If the PCM did not receive a TPS/MAP signal then a code for that component would set

    Voltages will be in the 5v and lower range.
     
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  6. Oct 20, 2019 at 3:41 PM
    #6
    TinyInkognegroT

    TinyInkognegroT [OP] Well-Known Member

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    How am I supposed to test these wires? And I ran a multimeter on them the first time with the key turned on, I got no voltages.
     
  7. Oct 21, 2019 at 5:38 AM
    #7
    Awrench

    Awrench Well-Known Member

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    might be the relay to PCM timing out, need to check that. With sensor plugged in or disconnected there should be 5v on the VT/WT wire .

    Is that color in the 3 wire connector to both MAP and TPS?
    The diagram I added above details the connector pinout.
     
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  8. Oct 21, 2019 at 9:28 AM
    #8
    TinyInkognegroT

    TinyInkognegroT [OP] Well-Known Member

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    Yes the Violet and white wire and the black and blue wire are on both the TPS and MAP Sensors. Where can I find that relay?
     
  9. Oct 21, 2019 at 2:59 PM
    #9
    TinyInkognegroT

    TinyInkognegroT [OP] Well-Known Member

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    Where can I find the relay and how do I test it?
     
  10. Oct 22, 2019 at 2:51 AM
    #10
    Awrench

    Awrench Well-Known Member

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    lets try this - is there 12v at injectors/ at coil?

    If the MAP and TPS were not sending a signal the engine would not operate correctly, AND a code would set.
    What are we checking for?
     
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  11. Oct 22, 2019 at 4:27 AM
    #11
    TinyInkognegroT

    TinyInkognegroT [OP] Well-Known Member

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    Well every time I start it up whether it's been sitting overnight or sitting for 5 minutes, it's either the engine or transmission let's acting sluggish as if it's clogged or congested. Slow hard shifts and I have to hold the gas down to let it clear up and drive decently. If it's the transmission, the only thing I can think of is adding that quart of Lucas on top of full transmission fluid and maybe that overfilled my transmission and causing it to act sluggish
     
  12. Oct 22, 2019 at 5:37 AM
    #12
    aggrex

    aggrex Well-Known Member

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    Tuffy>AEV>TTO>JW>STech>EVOcage>MagnaFlow>SpiderTrax>RockHard>TF>SpringTail>67design>Bolt>GPCA>Curt>
    I get a bit sluggish during happy hour too! Check trans fluid level and drain accordingly. Too little or too much can cause similar issues. Make sure to use the correct trans fluid.
     
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  13. Oct 22, 2019 at 5:38 AM
    #13
    TinyInkognegroT

    TinyInkognegroT [OP] Well-Known Member

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    Here are some older videos of the same problem, watch my RPMS
    And just to double-check, the correct transmission fluid is ATF 4 and not Dex Merc ?
     
  14. Oct 22, 2019 at 5:40 AM
    #14
    TinyInkognegroT

    TinyInkognegroT [OP] Well-Known Member

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    Do the drain pans for the 46rh and the 46re differ from each other or are they the same? I'm asking because I found a pan that has a drain plug but the website for advance Auto parts says it's for a 46re and it fits my 93 Grand Cherokee with a 5.2... I was just curious if it would fit my 46rh so that way I can easily drain my transmission fluid without having to take off the whole pan.
     
  15. Oct 22, 2019 at 5:42 AM
    #15
    aggrex

    aggrex Well-Known Member

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    I'm at work pretending to work. I think we had this discussion before and dex merc was not correct
     
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  16. Oct 22, 2019 at 5:45 AM
    #16
    TinyInkognegroT

    TinyInkognegroT [OP] Well-Known Member

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    I got to be at work in 30 minutes to play work too LOL yeah I'm sure we had this discussion before I just have so much things going on I tend to forget
     
  17. Oct 22, 2019 at 12:25 PM
    #17
    TinyInkognegroT

    TinyInkognegroT [OP] Well-Known Member

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    PHOTO_20191022_131009.jpg PHOTO_20191022_141607.jpg PHOTO_20191022_131009.jpg
    Heres the fluid level. And I just read the dipstick, says to use ATF or Dex 2...so what's the difference between the two ?
     
    Last edited: Oct 22, 2019
  18. Oct 22, 2019 at 2:21 PM
    #18
    aggrex

    aggrex Well-Known Member

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    I would just use some quality brand Dexron II/III trans oil. Check owners manual for trans capacity
     
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