2022 Mazda 3 BaseFACTORY OEM SERVICE PROCEDURE

LIMITED i-stop FUNCTION OPERATION TIME: Notes

LIMITED I-STOP FUNCTION OPERATION TIME (SKYACTIV-G - US) DESCRIPTION AND POSSIBLE CAUSE

Troubleshooting item Limited i-stop function operation time
Description
  • Frequency of which i-stop function operates is low.
  • Frequent occurrence of engine restarting other than for driving vehicle from stop.
Possible cause
NOTE:
  • To ensure electric vehicle system reliability, restart the engine regardless of the vehicle condition after 120 s have elapsed since the i-stop function operated.
  • DTCs are stored in the following modules.
    • PCM
    • DC-DC converter (Mazda M Hybrid)
    • Mazda M Hybrid battery
    • Integrated starter generator (ISG)
    • Dash-electrical supply unit
    • Electronically controlled brake unit
    • SAS control module
    • TCM
    • EPS control module
    • Body control module (BCM)
Battery voltage low during i-stop function operation 
  • Insufficient battery recharge while engine is running
    • Low recharge effect
      • Integrated starter generator (ISG) malfunction (part, system, control malfunction)
      • Large amount of vehicle power consumption
  • High electrical load from aftermarket electrical accessories
  • Mazda M Hybrid battery malfunction (remaining capacity is low, duct of floor under cover No. 1 (RH) is clogged, or Mazda M Hybrid battery is deteriorated)
False detection of engine starting conditions 
  • False detection of battery voltage
False recognition of driver performing engine start operation 
  • False detection of released brake pedal
    • Brake fluid pressure sensor (built-into electronically controlled brake unit) malfunction
  • False detection of steering wheel operation
    • Steering angle sensor initialization malfunction
    • EPS control module malfunction
    • Steering angle sensor malfunction
System wiring diagram
  • Not applicable
Connector diagram
  • Not applicable
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.