Symptom Troubleshooting [Engine Control System MZI-3.7]: Foreword

• When the customer reports a vehicle malfunction, check the malfunction indicator lamp (MIL) indication and diagnostic trouble code (DTC), then diagnose the malfunction according to the following flowchart:
  • If a DTC exists, diagnose the applicable DTC inspection. (See DTC TABLE article.)
  • If no DTC exists and the MIL does not illuminate or flash, diagnose the applicable symptom troubleshooting. (See QUICK DIAGNOSTIC CHART .)
    Fig 1: Troubleshooting Engine Control System Work Flow Diagram

    Courtesy of MAZDA MOTORS CORP.

*: Malfunction Indicator Lamp (MIL), Generator Warning Light, Security Light