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Home >> Mazda >> 2021 >> CX-3 AWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> On-Board Diagnostics - Transaxle >> On-Board Diagnostic System DTC Inspection >> Reading DTCs Procedure >> CMDTC self test

CMDTC self test

  1. Connect the M-MDS to the DLC-2.
  2. After the vehicle is identified, select the following items from the initialization screen of the M-MDS.
    1. Select "Self Test".
    2. Select "Modules".
    3. Select "TCM".
    NOTE:
    • Freeze frame data/snapshot data appears at the top of the help screen when the displayed DTC is selected.

    Freeze frame data

    • The freeze frame data consists of data for vehicle and transaxle control system operation conditions when malfunctions in the transaxle control system are detected and stored in the TCM.
    • Freeze frame data is stored at the instant the malfunction indicator lamp illuminates, and only a part of the DTC data is stored.

    Snapshot data

    • The data for all DTCs currently detected is stored.

    Recorded DTC timing

    • For DTCs with one drive cycle, data is recorded during the malfunction determination period.
    • For DTCs with two drive cycles, data is recorded during non-determination (1st diagnosis) periods.
  3. Then, select the "Retrieve CMDTCs" and perform procedures according to the directions on the M-MDS screen.
  4. Verify the DTC according to the directions on the screen.
    • If any DTCs are displayed, perform troubleshooting according to the corresponding DTC inspection.
  5. After completion of repairs, clear all DTCs stored in the TCM. (See CLEARING DTCS PROCEDURES .)