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Home >> Mazda >> 2024 >> CX-90 Turbo Select >> Repair and Diagnosis >> Transmission >> Automatic Trans >> On-Board Diagnostic - Automatic Transaxle (Mm8AX-EC) >> DTC U1103-00: Can Communication: Communication Error To Selector Lever (At-Bus)

DTC U1103-00: Can Communication: Communication Error To Selector Lever (At-Bus)

System malfunction location CAN communication: Communication error to selector lever (AT-bus)
Detection condition
  • The TCM cannot receive CAN signal from selector lever.

    Precondition 

  • Battery voltage is the standard or more.
Fail-safe
  • If a communication error occurs with the selector lever (CAN bus No. 2) at the same time, inhibits driving (neutral) when the vehicle is stopped.
Possible cause
  1. Malfunction in wiring harness (including connector/terminal) between selector lever and TCM (See CIRCUIT INSPECTION .) (See CONNECTOR INSPECTION .)
  2. Selector lever malfunction (Refer to [SELECTOR LEVER COMPONENT REMOVAL/INSTALLATION ] in service information).
  3. Control valve body malfunction (TCM malfunction) (Refer to [CONTROL VALVE BODY REMOVAL/INSTALLATION ] in service information).
Repeatability verification procedure
  1. Clear the DTC recorded in the memory. (See CLEARING DTC .)
  2. Perform the following procedure to ensure that the DTC has been resolved:
    • Switch the ignition ON (engine off or on).
G16689597Courtesy of MAZDA MOTORS CORP.
1 TCM
2 Selector lever