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TCM Issue "Drive Authorization not Enabled"

187 Views 1 Replies Latest reply: 2026-01-16 14:18:01


  •   Level 1   
    (5) points
    Mark Thrasher
    2026-01-16 00:21:35
    Hello All,
     I have installed a new valve body assembly in a 2007 R350 (w251 Chassis) 722.9 transmission.  Conductor plate has been programmed and coded.  Everything appears to be correct...... however I can't get a "yes" in the drive authorization in the TCM.  Drive Authorization is showing "Yes" in the ECU.  Car starts fine..... Transmission selector has been taught properly..... can here the ISM actuating when Drive, Neutral or Reverse is selected..... but, the car won't move.  Hence....no "drive Authorization."  Have been on the phone a few times with Autel Support.... done the Data Log submission to the Engineers..... but... nothing is fixing the issue.  Just wondering if anyone has any insight?
    Thanks
    Mark
     

  •   Level 10   
    (8781) points

    2026-01-16 14:18:01 (Reply to:Mark Thrasher)

    Hi, this could be a problem with the security system(Das), due to a not correct battery
    voltage(weak battery)..0r it does
    Not recognize the key ,also check the brake light switch.
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