Problem Symptoms Table [10/2019 - 10/2023]

HINT:

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.

STOP AND START SYSTEM

Symptom	Suspected Area	Link
Stop and start system does not operate	Stop and start system operation prohibition based on the battery conditions (Refer to "Stop and Start System does not Operate (Battery Condition)")	Refer to Stop and Start System does not Operate (Battery Condition) [11/2018 - 10/2023]
	Engine hood courtesy switch circuit	Refer to Engine Hood Courtesy Switch Circuit [11/2018 - 10/2023]
	Driver door courtesy switch circuit (system prohibits control)	Refer to SYSTEM DESCRIPTION [10/2019 - 12/2021] , or refer to SYSTEM DESCRIPTION [12/2021 - 10/2022] , or refer to SYSTEM DESCRIPTION [10/2022 - 10/2023]
	Driver door courtesy switch circuit (CAN communication DTC U0140-87)	Refer to DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module Missing Message; DTC U0131-87: Lost Communication with Power Steering Control Module Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0151-87: Lost Communication with Restraints Control Module Missing Message; DTC U0164-87: Lost Communication with HVAC Control Module Missing Message; DTC U023A-87: Lost Communication with Image Processing Module "A" Missing Message; DTC U1110-87: Lost Communication with Intuitive Parking Assist Module Missing Message [11/2018 - 10/2023]
	Driver door courtesy switch circuit	Refer to Door Courtesy Switch Circuit [11/2018 - 10/2023]
	Driver seat belt buckle switch circuit (system prohibits control)	Refer to SYSTEM DESCRIPTION [10/2019 - 12/2021] , or refer to SYSTEM DESCRIPTION [12/2021 - 10/2022] , or refer to SYSTEM DESCRIPTION [10/2022 - 10/2023]
	Driver seat belt buckle switch circuit (CAN communication DTC U0140-87)	Refer to DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module Missing Message; DTC U0131-87: Lost Communication with Power Steering Control Module Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0151-87: Lost Communication with Restraints Control Module Missing Message; DTC U0164-87: Lost Communication with HVAC Control Module Missing Message; DTC U023A-87: Lost Communication with Image Processing Module "A" Missing Message; DTC U1110-87: Lost Communication with Intuitive Parking Assist Module Missing Message [11/2018 - 10/2023]
	Front seat inner belt assembly LH	Refer to Driver Side Seat Belt Warning Light does not Operate [11/2018 - 08/2020] , or refer to Driver Side Seat Belt Warning Light does not Operate [08/2020 - ]
	Air conditioning system (system prohibits control)	Refer to SYSTEM DESCRIPTION [10/2019 - 12/2021] , or refer to SYSTEM DESCRIPTION [12/2021 - 10/2022] , or refer to SYSTEM DESCRIPTION [10/2022 - 10/2023]
	Air conditioning system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ]
	Brake booster vacuum is low (system prohibits control)	Refer to SYSTEM DESCRIPTION [10/2019 - 12/2021] , or refer to SYSTEM DESCRIPTION [12/2021 - 10/2022] , or refer to SYSTEM DESCRIPTION [10/2022 - 10/2023]
	Brake booster vacuum is low	Refer to DTC P0555-00: Brake Booster Pressure Sensor(running); DTC P0555-2A: Brake Booster Pressure Sensor Signal Stuck In Range [11/2018 - 10/2023]
	Backup boost converter circuit	Refer to Backup Boost Converter Circuit [10/2019 - 08/2020] , or refer to Backup Boost Converter Circuit [08/2020 - 12/2021] , or refer to Backup Boost Converter Circuit [12/2021 - 10/2022] , or refer to Backup Boost Converter Circuit [10/2022 - 10/2023]
	Park/Neutral position switch assembly circuit	Refer to Neutral Position Switch Circuit [10/2019 - 10/2023]
	Starter signal circuit	Refer to Starter Signal Circuit [10/2019 - 08/2020] , or refer to Starter Signal Circuit [08/2020 - 12/2021] , or refer to Starter Signal Circuit [12/2021 - 10/2023]
	STA signal circuit	Refer to STA Signal Circuit [11/2018 - 08/2020] , or refer to STA Signal Circuit [08/2020 - 12/2021] , or refer to STA Signal Circuit [12/2021 - 10/2023]
	Starter inrush current reduction relay circuit	Refer to Starter Inrush Current Reduction Relay Circuit [11/2018 - 12/2021] , or refer to Starter Inrush Current Reduction Relay Circuit [12/2021 - 10/2023]
	Crankshaft position sensor	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - 08/2020] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2020 - ]
	ECM	Refer to TERMINALS OF ECM [10/2019 - 08/2020] , or refer to TERMINALS OF ECM [08/2020 - 12/2021] , or refer to TERMINALS OF ECM [12/2021 - ]
	Vacuum sensor assembly	Refer to ON-VEHICLE INSPECTION [11/2018 - ]
	Brake booster assembly	Refer to ON-VEHICLE INSPECTION [11/2018 - ]
	Oil pump with solenoid assembly (for 2WD)	Refer to PROCEDURE - Step 5
	Oil pump with solenoid assembly (for AWD)	Refer to PROCEDURE - Step 5
	Starter assembly	Refer to INSPECTION [11/2018 - 08/2020] , or refer to INSPECTION [08/2020 - 12/2021] , or refer to INSPECTION [12/2021 - ]
	The deceleration sensor zero point calibration is performed	Refer to REGISTRATION [10/2019 - 12/2021] , or refer to REGISTRATION [12/2021 - 10/2022] , or refer to REGISTRATION [10/2022 - 10/2023]
	Deceleration sensor (airbag ECU assembly)	Refer to ON-VEHICLE INSPECTION [11/2018 - 08/2020] , or refer to ON-VEHICLE INSPECTION [08/2020 - ]
	Skid control ECU (brake actuator assembly)	Refer to TERMINALS OF ECU [11/2018 - 12/2021] , or refer to TERMINALS OF ECU [12/2021 - ]
	CAN communication system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ]
	Engine stop and start ECU	Refer to TERMINALS OF ECU [10/2019 - 12/2021] , or refer to TERMINALS OF ECU [12/2021 - 10/2022] , or refer to TERMINALS OF ECU [10/2022 - 10/2023]
	Battery*1	Refer to ON-VEHICLE INSPECTION [11/2018 - 10/2023]
	Wire harness or connector	-
Starter assembly does not operate	Battery	Refer to ON-VEHICLE INSPECTION [11/2018 - 10/2023]
	Starter assembly	Refer to INSPECTION [11/2018 - 08/2020] , or refer to INSPECTION [08/2020 - 12/2021] , or refer to INSPECTION [12/2021 - ]
	Park/Neutral position switch assembly (for 2WD)	Refer to INSPECTION [11/2018 - ]
	Park/Neutral position switch assembly (for AWD)	Refer to INSPECTION [11/2018 - ]
	Smart key system (for start function)	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - 08/2020] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2020 - 12/2021] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2021 - 10/2023]
	Starter signal circuit (SFI system)	Refer to Starter Signal Circuit [11/2018 - 08/2020] , or refer to Starter Signal Circuit [08/2020 - 12/2021] , or refer to Starter Signal Circuit [12/2021 - ]
	Starter signal circuit	Refer to Starter Signal Circuit [10/2019 - 08/2020] , or refer to Starter Signal Circuit [08/2020 - 12/2021] , or refer to Starter Signal Circuit [12/2021 - 10/2023]
Cranking speed decreases	Battery	Refer to ON-VEHICLE INSPECTION [11/2018 - 10/2023]
	Starter inrush current reduction relay circuit	Refer to Starter Inrush Current Reduction Relay Circuit [11/2018 - 12/2021] , or refer to Starter Inrush Current Reduction Relay Circuit [12/2021 - 10/2023]
	Starter assembly	Refer to INSPECTION [11/2018 - 08/2020] , or refer to INSPECTION [08/2020 - 12/2021] , or refer to INSPECTION [12/2021 - ]
Stop and start cancel indicator does not operate	Combination meter assembly	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ]
	Indicator circuit (CAN communication system)	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ]
	Engine stop and start ECU	Refer to TERMINALS OF ECU [10/2019 - 12/2021] , or refer to TERMINALS OF ECU [12/2021 - 10/2022] , or refer to TERMINALS OF ECU [10/2022 - 10/2023]
Stop and start indicator does not operate	Combination meter assembly	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ]
	Indicator circuit (CAN communication system)	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2018 - ]
	Engine stop and start ECU	Refer to TERMINALS OF ECU [10/2019 - 12/2021] , or refer to TERMINALS OF ECU [12/2021 - 10/2022] , or refer to TERMINALS OF ECU [10/2022 - 10/2023]
Stop and start control cannot be canceled	ECAN terminal voltage	Refer to TERMINALS OF ECU [10/2019 - 12/2021] , or refer to TERMINALS OF ECU [12/2021 - 10/2022] , or refer to TERMINALS OF ECU [10/2022 - 10/2023]
Stop and start control cannot be canceled	Stop and start cancel switch circuit	Refer to Stop and Start Cancel Switch Circuit [11/2018 - 10/2023]
Engine not stopped by stop and start control (stop and start operation prohibited)	Engine hood courtesy switch circuit	Refer to Engine Hood Courtesy Switch Circuit [11/2018 - 10/2023]
	Driver side door courtesy switch circuit	Refer to Door Courtesy Switch Circuit [11/2018 - 10/2023]
	Stop light switch assembly	Refer to ON-VEHICLE INSPECTION [11/2018 - ]
	Engine stop and start ECU	Refer to TERMINALS OF ECU [10/2019 - 12/2021] , or refer to TERMINALS OF ECU [12/2021 - 10/2022] , or refer to TERMINALS OF ECU [10/2022 - 10/2023]
Multi-information display screen does not change after pressing steering pad switch assembly	Stop and start priority control system	Refer to Stop and Start Priority Control System [11/2018 - 10/2022] , or refer to Stop and Start Priority Control System [10/2022 - 10/2023]
Multi-information display screen changes without pressing steering pad switch assembly	Stop and start priority control system	Refer to Stop and Start Priority Control System [11/2018 - 10/2022] , or refer to Stop and Start Priority Control System [10/2022 - 10/2023]
An interruption message is not displayed in the combination meter assembly when the stop and start system cancel switch (eco run cancel switch assembly) is pressing and holding	Stop and start priority control system	Refer to Stop and Start Priority Control System [11/2018 - 10/2022] , or refer to Stop and Start Priority Control System [10/2022 - 10/2023]
The control mode changes but an interruption message is not displayed in the combination meter assembly	Stop and start priority control system	Refer to Stop and Start Priority Control System [11/2018 - 10/2022] , or refer to Stop and Start Priority Control System [10/2022 - 10/2023]
The control mode does not change but an interruption message is displayed in the combination meter assembly	Stop and start priority control system	Refer to Stop and Start Priority Control System [11/2018 - 10/2022] , or refer to Stop and Start Priority Control System [10/2022 - 10/2023]
Control mode returns to default mode after turning ignition switch to ON	Stop and start priority control system	Refer to Stop and Start Priority Control System [11/2018 - 10/2022] , or refer to Stop and Start Priority Control System [10/2022 - 10/2023]

*1: If the vehicle has not been used for a long time, the battery charge may be low and stop and start control operation may be prohibited. In this case, recharge the battery, initialize the integrated current value*2 and drive the vehicle approximately 5 to 40 minutes until stop and start control operation is permitted.
*2: Use the Techstream to perform Integrated Current Value Initialization.

Refer to REGISTRATION [10/2019 - 12/2021] , or refer to REGISTRATION [12/2021 - 10/2022] , or refer to REGISTRATION [10/2022 - 10/2023]

HINT:

If the Data List item "Integrated Current" is A-sec or more, it is not necessary to perform initialization.