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Trouble Code Access

  1. Use Self Diagnostic Checker (49 H018 9A1) and System Selector (49 B019 9A0) to retrieve trouble codes. Connect one lead of self diagnostic checker to ground and the other to system selector. Connect system selector to diagnostic connector. If system selector is not available, connect a jumper wire between terminals TEN and GND. See Fig 1 .
  2. With ignition on and engine stopped, observe CHECK ENGINE light or Malfunction Indicator Light (MIL). Note trouble codes. If light remains on continuously, MIL circuit is grounded or ECU is defective.
  3. The code will be repeated, or other codes will be flashed if more than one is stored. If more than one code is stored, codes will be displayed in order of lowest to highest. See TROUBLE CODE IDENTIFICATION chart for diagnostic procedure.
Fig 1: Locating Self-Diagnostic Connector (MPV 3.0L)
G94H44989Courtesy of MAZDA MOTORS CORP.
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