On-Board Diagnostic [Engine Control System L3 With TC) - (1 Of 4): 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 .)
- If a DTC does not exist and the MIL does not illuminate or flash, diagnose the applicable symptom troubleshooting. (See QUICK DIAGNOSTIC CHART ).
  
  Fig 1: DTC - Flow Chart
  Courtesy of MAZDA MOTORS CORP.
  
  Call out for Fig 1
  
  *: Malfunction Indicator Lamp (MIL), Generator Warning Light, Security Light