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Thread: 2020 Dodge Challenger 5.7 - Won't Read or Write

  1. #1
    Potential Tuner
    Join Date
    Mar 2023
    Posts
    4

    2020 Dodge Challenger 5.7 - Won't Read or Write

    Good afternoon HPT community,

    I am reaching out to see if anyone else has run into a problem like this. I read/write 2018+ Mopar vehicles every week and have for over 4 years now. Never run into this problem, however I am concerned this may be a new form of micro protection that has not been sorted out (assuming the car was recently updated at a dealer).

    When trying to read the stock/original software VCM Editor produces the message stating "Controller Init: Failed To Start" - such as if the Smart Access cable isn't installed. The PCM will ID / gather info.

    I am running the latest VCM beta, the Smart Access cable is installed in the gateway behind the UConnect screen / Nav in the center of the dash. I have looked everywhere under the dash and center console to double check there isn't another module somewhere else.

    I have also tested the same MPVI3+ & Smart Access cable on 3 other Mopar's currently in our shop (2023 Rubicon 392, 2019 5.7 Challenger, and a 2018 392 Charger. No issues at all.

    Lastly, I have removed the PCM and applied the patch from HPT to unlock it (with Alientech KESS3), KESS3 had no issue communicating, reading and writing via boot mode. This was performed after originally trying to read the vehicle out (bone stock all original) with no success.


    Protocol Info: ISO 15765-2: Standard 11 bit Normal, J1962: CAN 500 kb/s

    ECM: 7E8, CAN, ECM -EngineControl - GPEC2A, 2018+ Dodge
    VIN: 2C3CDZBT4LH242811 - 2020 Dodge Challenger R/T, 5.7 L, V8
    Serial: T00EP2700J25PV
    OS: 68428218AC
    Base OS: G2A20P05V12.0_ENGV12.0_TXXVXX.X_0
    Calibration IDs: 68428218AB
    Calibration VNs: B5F3C553
    Basic PIDs: 52
    Controller Type ID By OS: 21126

    TCM: 7E9, CAN, TCM -TransmisCtrl - ZF8HP, Dodge
    Serial: T09UN279081330
    OS: 68428223AC
    Base OS: PRM23000_00000
    Calibration IDs: 68428223AC
    Calibration VNs: 575770A1
    Basic PIDs: 12
    Controller Type ID By OS: 21060

  2. #2
    Advanced Tuner N2speed's Avatar
    Join Date
    Mar 2021
    Location
    Pompano Beach FL
    Posts
    433
    For what I know the patch system from Alientech does not work with HP Tuners
    www.n2speed.com
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