Engine auto stop control does not operate

Precautions: Precautions for Diagnosing Trouble · Precautions for Servicing ENG A-STOP System · Precautions for Replacing ENG A-STOP Control Module · Precautions for Control Systems · General safety (00)

NOTE:

•Perform ENG A-STOP system check referring to ENG A-STOP System Check before performing this ENG A-STOP System Symptom Diagnosis.
•ENG A-STOP control module monitors the battery condition through input signals from the battery voltage and electric load current sensor & battery temperature sensor, etc., and performs the ENG A-STOP control only when it judges that the battery is in a fully charged condition.
•In case the battery discharge is suspected (e.g. when the vehicle has not been used for a long time.), disconnect the negative (–) cable at the battery and recharge the battery.
When recharging the battery without disconnecting the negative (–) cable at the battery, it will be necessary to drive the for maximum 3 hours before the ENG A-STOP control module judges that the battery is fully charged, during which the ENG A-STOP system does not operate.

Condition	Possible Cause	Action
Engine auto stop control does not operate	Lighting or blinking MIL	Check DTC. •M16A model: •K14C model: •D16AA model:
	Faulty CPP switch (M/T model)	Check CPP switch. •CPP No.1 switch: •CPP No.2 switch:
	Faulty G sensor	Check G sensor.
	Faulty ENG A-STOP OFF switch	ENG A-STOP OFF Switch Inspection
	Faulty neutral position switch (M/T model)	Neutral Position Switch Inspection (M/T Model)
	Faulty brake light switch (A/T model / twin clutch system model)	Brake Light Switch Inspection
	Faulty G sensor (A/T model / twin clutch system model)	Yaw Rate / G Sensor Assembly On-Vehicle Inspection
	Faulty brake master cylinder pressure sensor (A/T model / twin clutch system model)	Brake Master Cylinder Pressure Sensor On-Vehicle Inspection
	Faulty APP sensor (A/T model / twin clutch system model)	Check APP sensor. •M16A model: •K14C model: •D16AA model:
	Faulty driver door switch	Front and Rear Door Switch Inspection
	Faulty driver seat belt buckle switch	Front Seat Belt Assembly Inspection
	Faulty generator	Check charging system. •M16A model: •K14C model: •D16AA model:
	Faulty ECT sensor	Check ECT sensor. •M16A model: •K14C model: •D16AA model:
	Faulty throttle body (M16A model / K14C model)	Check throttle body. •M16A model: •K14C model:
	Faulty battery	Check battery. •M16A model: •K14C model: •D16AA model:
	Faulty HVAC control module (auto A/C model)	Inspection of HVAC Control Module and Its Circuits:Automatic Type
	Faulty ECM	Check ECM and its circuit. •M16A model: •K14C model: •D16AA model:
	Faulty ESP^® system	ESP® System Check
	Faulty twin clutch system (twin clutch system model)	Twin Clutch System Check
	Faulty ENG A-STOP control module	Inspection of ENG A-STOP Control Module and Its Circuits