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Home >> Mazda >> 2004 >> MPV ES >> Repair and Diagnosis >> Transmission >> Automatic Trans >> On-Board Diagnostic [Automatic Transmission] >> Automatic Transaxle On-Board Diagnostic Function >> Diagnostic Trouble Codes Reading Procedure >> Using the voltmeter

Using the voltmeter

  1. Turn the ignition switch OFF.
  2. Connect the DLC located in the transaxle compartment terminal TAT and ground using a jumper wire.
    CAUTION:
    • Connecting to the wrong DLC terminal may cause a malfunction. Carefully connect only to the specified terminal.
  3. Connect the negative battery lead of voltmeter (20 V range) to the data link connector terminal FAT, and the positive lead to the data link connector terminal +B.
  4. Turn the ignition switch ON.
  5. The voltmeter indicates the battery positive voltage for approx. 3 seconds,  then indicates 0V. 
    Fig 1: DTC Reading Procedure Using Voltmeter
    G00992490Courtesy of MAZDA MOTORS CORP.
  6. Read the DTCs indicated by the movement of the voltmeter's needle. If DTC is not detected, the needle does not move.
    NOTE:
    • Code No. indication by the voltmeter's needle is as shown.
  7. If any DTCs is indicated, inspect the appropriate area and repair if necessary.
    Fig 2: Diagnostic Trouble Code Indication Pattern
    G00992491Courtesy of MAZDA MOTORS CORP.