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01 Tacoma not shifting automatically

Discussion in 'Technical Chat' started by BBMOffroad, Feb 7, 2015.

  1. Feb 7, 2015 at 7:31 PM
    #1
    BBMOffroad

    BBMOffroad [OP] BBM Offroad

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    My 01 tacoma with a factory 3.4l and automatic transmission isn't shifting ever since I removed the stock gauge cluster. I have aftermarket gauges but not running a speedo. If I plug in my gauge 2 it shows speed as we jumped 2 of the wires together. Has to be something else I'm missing.
     
  2. Feb 7, 2015 at 8:52 PM
    #2
    gearcruncher

    gearcruncher Well-Known Member

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    Great white North 51.0333° N, 93.8333° W
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    2010.TRD.SportDCLB4x4Limited leather package
    TRD Sport Rally -5 speed automatic Limited ,Factory heated leather seats ,chrome package,Super white with front windows tinted to 35 % Dick Cepek DC-2 wheels Summer tires - Good year silent armor P265/65R17 Winter tires - Good year P265/65R17 Ultra Ice studded Illuminated 4x4 switch TRD 3rd brake light cover ($20) TRD seat belt shoulder protectors (5). ($50) TRD ...B pillar emblems ($20) TRD rear slider sticker with devil horns ( $6) TRD summer floor matts ($60) TRD steering wheel emblem ($20) TRD floor pedals .($95) TRD shorty antenna ($14) TRD front Windshield emblems ($17) TRD head pillows .($60) TRD head rest protectors TRD door scuff protection $20 TRD floor matt emblems ($40) TRD tow plug emblem . ($40) TRD cigarette lighter with LED.($35) TRD tissue dispenser ($12) TRD front bezel emblems ($9) TRD door emblems ($6) TRD lanyards($9) TRD lisence plates with TRD bolts($50) TRD fender emblems TRD center caps Part Number:PT904-35070-CC ($80) TRD cd
    The transmission is computer controlled .
    With this said , your computer needs to read a vehicle speed in order to upshift .
    If you had the dash removed , there is a good chance the computer in the truck does not see the vehicle moving forward , therefore ----no upshift
    Here is some reading for ya . This transmission works identical to yours
    http://www.tacomaworld.com/forum/te...warner-340-series-transmissions-write-up.html
     
  3. Feb 8, 2015 at 6:28 AM
    #3
    BBMOffroad

    BBMOffroad [OP] BBM Offroad

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    There's a ton of info there. But I'm seeing the info needed to fix my issue. With the scan gauge installed it's telling me speed other then I know it's way off do to axle gearing. Roughly 30mph off do to gearing. With the scan gauge reading speed through the obd2 port I'd assume the Ecm is getting the signal. But I read somewhere about possibly 2 speed sensors?
     
  4. Feb 8, 2015 at 7:06 AM
    #4
    gearcruncher

    gearcruncher Well-Known Member

    Joined:
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    Great white North 51.0333° N, 93.8333° W
    Vehicle:
    2010.TRD.SportDCLB4x4Limited leather package
    TRD Sport Rally -5 speed automatic Limited ,Factory heated leather seats ,chrome package,Super white with front windows tinted to 35 % Dick Cepek DC-2 wheels Summer tires - Good year silent armor P265/65R17 Winter tires - Good year P265/65R17 Ultra Ice studded Illuminated 4x4 switch TRD 3rd brake light cover ($20) TRD seat belt shoulder protectors (5). ($50) TRD ...B pillar emblems ($20) TRD rear slider sticker with devil horns ( $6) TRD summer floor matts ($60) TRD steering wheel emblem ($20) TRD floor pedals .($95) TRD shorty antenna ($14) TRD front Windshield emblems ($17) TRD head pillows .($60) TRD head rest protectors TRD door scuff protection $20 TRD floor matt emblems ($40) TRD tow plug emblem . ($40) TRD cigarette lighter with LED.($35) TRD tissue dispenser ($12) TRD front bezel emblems ($9) TRD door emblems ($6) TRD lanyards($9) TRD lisence plates with TRD bolts($50) TRD fender emblems TRD center caps Part Number:PT904-35070-CC ($80) TRD cd
    Here are the inputs the ecm has to see in order for the transmission to function
    http://www.customtacos.com/tech.old.../06toyrm/06toypdf/06rmsrc/rm2006ta/026000.pdf

    If you look at the diagram on the pdf , it looks like the speed signal goes into the dash and then to the ecm .
    Do you have abs on the truck ?
    There are three speed sensors . input speed sensor , output speed sensor and vehicle speed sensor . The sensor you need to concentrate on drives the dash speedometer .
    Do you have a wiring diagram for your truck ?
     
  5. Feb 8, 2015 at 7:16 AM
    #5
    BBMOffroad

    BBMOffroad [OP] BBM Offroad

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    Truck never had abs. It does have the ect button on the dash though. Cruise control has been discontinued at the steering wheel do to quick release and aftermarket steering wheel. I don't have a full diagram. I can't open the link in tapatalk acting weird since CT is part of auto guide.

    Off the factory cluster plug. I soldiered a green/red and green/orange together. After that is when scan gauge started reading speeds again
     
  6. Feb 8, 2015 at 7:27 AM
    #6
    gearcruncher

    gearcruncher Well-Known Member

    Joined:
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    Great white North 51.0333° N, 93.8333° W
    Vehicle:
    2010.TRD.SportDCLB4x4Limited leather package
    TRD Sport Rally -5 speed automatic Limited ,Factory heated leather seats ,chrome package,Super white with front windows tinted to 35 % Dick Cepek DC-2 wheels Summer tires - Good year silent armor P265/65R17 Winter tires - Good year P265/65R17 Ultra Ice studded Illuminated 4x4 switch TRD 3rd brake light cover ($20) TRD seat belt shoulder protectors (5). ($50) TRD ...B pillar emblems ($20) TRD rear slider sticker with devil horns ( $6) TRD summer floor matts ($60) TRD steering wheel emblem ($20) TRD floor pedals .($95) TRD shorty antenna ($14) TRD front Windshield emblems ($17) TRD head pillows .($60) TRD head rest protectors TRD door scuff protection $20 TRD floor matt emblems ($40) TRD tow plug emblem . ($40) TRD cigarette lighter with LED.($35) TRD tissue dispenser ($12) TRD front bezel emblems ($9) TRD door emblems ($6) TRD lanyards($9) TRD lisence plates with TRD bolts($50) TRD fender emblems TRD center caps Part Number:PT904-35070-CC ($80) TRD cd
    Are you getting any codes with the scan guage ? If the transmission is not shifting , there should be a code stored in the ecm memory identifying why the transmission doesnt shift
    The instrument cluster could be responsible for changing the ac signal from the speed sensor to a dc signal in order for the ecm to read the information .
     
  7. Feb 8, 2015 at 7:31 AM
    #7
    BBMOffroad

    BBMOffroad [OP] BBM Offroad

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    There was no codes last I checked. I'll check again when I go to pull the truck off the trailer
     
  8. Feb 8, 2015 at 10:33 AM
    #8
    BBMOffroad

    BBMOffroad [OP] BBM Offroad

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    There is no code stored.

    coming off the sender, there's a pink-power, Green/red- signal, blue-ground.

    I have green/red attached to green/orange. That should send the signal the ecu. In theory that should send the signal to the ecu. Wondering if the blue off the sensor needs to be grounded to the chassis.
     
  9. Feb 8, 2015 at 10:45 AM
    #9
    gearcruncher

    gearcruncher Well-Known Member

    Joined:
    Nov 1, 2012
    Member:
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    Messages:
    7,173
    Gender:
    Male
    First Name:
    Canadain bumper technician
    Great white North 51.0333° N, 93.8333° W
    Vehicle:
    2010.TRD.SportDCLB4x4Limited leather package
    TRD Sport Rally -5 speed automatic Limited ,Factory heated leather seats ,chrome package,Super white with front windows tinted to 35 % Dick Cepek DC-2 wheels Summer tires - Good year silent armor P265/65R17 Winter tires - Good year P265/65R17 Ultra Ice studded Illuminated 4x4 switch TRD 3rd brake light cover ($20) TRD seat belt shoulder protectors (5). ($50) TRD ...B pillar emblems ($20) TRD rear slider sticker with devil horns ( $6) TRD summer floor matts ($60) TRD steering wheel emblem ($20) TRD floor pedals .($95) TRD shorty antenna ($14) TRD front Windshield emblems ($17) TRD head pillows .($60) TRD head rest protectors TRD door scuff protection $20 TRD floor matt emblems ($40) TRD tow plug emblem . ($40) TRD cigarette lighter with LED.($35) TRD tissue dispenser ($12) TRD front bezel emblems ($9) TRD door emblems ($6) TRD lanyards($9) TRD lisence plates with TRD bolts($50) TRD fender emblems TRD center caps Part Number:PT904-35070-CC ($80) TRD cd

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