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Home >> Mazda >> 2004 >> MX-5 Miata Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System >> Pcm Inspection >> GND Circuit Inspection
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GND Circuit Inspection

  1. Turn the ignition switch to LOCK.
  2. Disconnect the PCM connectors.
  3. Inspect for continuity between the PCM GND terminals and body GND using an ohmmeter.
    • If not as specified, repair the related harnesses for open circuit.
    Fig 1: Identifying PCM Ground Terminals
    G00989687Courtesy of MAZDA MOTORS CORP.
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