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Home >> Mazda >> 2021 >> MX-5 Miata RF Club, Automatic Trans >> Repair and Diagnosis >> Transmission >> Automatic Trans >> On-Board Diagnostics - Automatic Transaxle >> On-Board Diagnostic System DTC Inspection >> Reading DTCs Procedure

Reading DTCs Procedure

  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:
    • Snapshot data appears at the top of the help screen when the displayed DTC is selected. 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 MMDS 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 .)