2005: MX-5 MIATA: Notes

• Using the OBD-II drive mode, the monitoring item requested by OBD-II regulations can be easily diagnosed.
• Performing the Drive Mode inspects the OBD-II system for proper operation and must be performed to ensure that no additional DTCs are present.
• The OBD-II drive mode is divided into the specific drive mode and single drive mode.
• For the specific drive mode, specified drive modes have been set for each individual monitoring item requested by OBD-II regulations, and they can be diagnosed individually. For the single drive mode, the entire monitoring item requested by OBD-II regulations can be diagnosed.
• The following modes are in the specific drive mode. The applicable system is diagnosed by driving in the following drive modes.
  • Mode 1 (PCM Adaptive Memory Produce Drive Mode)
  • Mode 2 (EGR System Repair Verification Drive Mode)
  • Mode 3 (HO2S heater, HO2S, and TWC Repair Verification Drive Mode)
  • Mode 4 (EVAP System Repair Verification Drive Mode)
• The following systems are diagnosed with the single drive mode.
  • EGR system
  • Oxygen sensor (HO2S)
  • Oxygen sensor heater
  • Catalytic converter (TWC)
  • Fuel, misfire and evaporative emission (EVAP) system
  CAUTION:

  • While performing the Drive Mode, always operate the vehicle in a safe and lawful manner.
  • When the WDS or equivalent is used to observe monitor system status while driving, be sure to have another technician with you, or record the data in the WDS or equivalent using the PID/DATA MONITOR AND RECORD function and inspect later.
  NOTE:

  • Vehicle speed and engine speed detected by the PCM may differ from that indicated by the speedometer and tachometer. Use the WDS or equivalent to monitor vehicle speed.
  • If the OBD-II system inspection is not completed during the Drive Mode, the following causes are considered:
    • The OBD-II system detects the malfunction.
    • The Drive Mode procedure is not completed correctly.
  • Disconnecting the battery will reset the memory. Do not disconnect the battery during and after Drive Mode.
  • The WDS or equivalent can be used at anytime through the course of the Drive Mode to monitor the completion status. Monitoring can be done by viewing the ON BOARD SYSTEM READINESS menu.
  • The OBD monitoring status can be confirmed with the ignition switch operation. During KOEO, the MIL illuminates for a fail-light inspection forapprox.17 s.  The OBD monitoring status is confirmed after the fail-light inspection.
    • If all of the diagnosis is completed even one time, the MIL will continue to illuminate.
    • If all of the diagnosis is not completed, the MIL flashes forapprox.7 s  , and then it illuminates until the engine is started.