Problem Symptoms Table [10/2014 - 09/2017]

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.
When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored.
When the millimeter wave radar sensor assembly is replaced with a new one, adjustment of the radar sensor beam axis must be performed.
When replacing the combination meter assembly, make sure to replace it with a new one.
After replacing the brake booster with master cylinder assembly (skid control ECU), perform linear valve offset learning and calibration.
Refer to CALIBRATION [10/2014 - 05/2019]

DYNAMIC RADAR CRUISE CONTROL SYSTEM

Symptom	Suspected Area	Link
The cruise control main switch cannot be turned on.	CAN communication system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 09/2017]
	Cruise control switch circuit	Refer to Cruise Control Switch Circuit [10/2014 - 09/2017]
	Cruise main indicator light circuit	Refer to Cruise Main Indicator Light Circuit [10/2014 - 09/2017]
	Combination meter assembly	Refer to REMOVAL [10/2014 - 09/2017]
	Driving support ECU assembly	Refer to REMOVAL [10/2014 - 09/2017]
	ECM	Refer to REMOVAL [10/2014 - ]
Switching using the MODE switch is not possible.	CAN communication system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 09/2017]
	Cruise control switch circuit	Refer to Cruise Control Switch Circuit [10/2014 - 09/2017]
	Combination meter assembly	Refer to REMOVAL [10/2014 - 09/2017]
	Driving support ECU assembly	Refer to REMOVAL [10/2014 - 09/2017]
	ECM	Refer to REMOVAL [10/2014 - ]
Switching using the vehicle-to-vehicle switch is not possible.	CAN communication system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 09/2017]
	Distance control switch circuit	Refer to Distance Control Switch Circuit [10/2014 - 09/2017]
	Combination meter assembly	Refer to REMOVAL [10/2014 - 09/2017]
	Driving support ECU assembly	Refer to REMOVAL [10/2014 - 09/2017]
Cannot set in the constant speed control mode.	CAN communication system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 09/2017]
	Electronically controlled brake system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 05/2019]
	Hybrid transaxle system	Refer to ON-VEHICLE INSPECTION [10/2014 - ]
	Cruise control switch circuit	Refer to Cruise Control Switch Circuit [10/2014 - 09/2017]
	Stop light switch circuit	Refer to DTC C1A4B: Stop Light Relay Circuit [10/2014 - 09/2017]
	Integration control and panel assembly	Refer to REMOVAL [10/2014 - ]
	ECM	Refer to REMOVAL [10/2014 - ]
	Driving support ECU assembly	Refer to REMOVAL [10/2014 - 09/2017]
Cannot set in the vehicle-to-vehicle distance control mode.	CAN communication system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 09/2017]
	Electronically controlled brake system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 05/2019]
	Hybrid transaxle system	Refer to ON-VEHICLE INSPECTION [10/2014 - ]
	Millimeter wave radar sensor assembly is dirty	-
	Millimeter wave radar sensor assembly beam axis not adjusted	Refer to ADJUSTMENT [10/2014 - 09/2017]
	Cruise control switch circuit	Refer to Cruise Control Switch Circuit [10/2014 - 09/2017]
	Wiper signal circuit	Refer to Wiper Signal Circuit [10/2014 - 09/2017]
	Millimeter wave radar sensor assembly	Refer to REMOVAL [10/2014 - 09/2017]
	Integration control and panel assembly	Refer to REMOVAL [10/2014 - ]
	Combination meter assembly	Refer to REMOVAL [10/2014 - 09/2017]
	ECM	Refer to REMOVAL [10/2014 - ]
	Driving support ECU assembly	Refer to REMOVAL [10/2014 - 09/2017]
Canceled during constant speed control.	CAN communication system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 09/2017]
	Electronically controlled brake system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 05/2019]
	Hybrid transaxle system	Refer to ON-VEHICLE INSPECTION [10/2014 - ]
	Cruise control switch circuit	Refer to Cruise Control Switch Circuit [10/2014 - 09/2017]
	Stop light switch circuit	Refer to DTC C1A4B: Stop Light Relay Circuit [10/2014 - 09/2017]
	Integration control and panel assembly	Refer to REMOVAL [10/2014 - ]
	ECM	Refer to REMOVAL [10/2014 - ]
	Driving support ECU assembly	Refer to REMOVAL [10/2014 - 09/2017]
Canceled during vehicle-to-vehicle control.	CAN communication system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 09/2017]
	Electronically controlled brake system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 05/2019]
	Millimeter wave radar sensor assembly is dirty	-
	Millimeter wave radar sensor assembly beam axis not adjusted	Refer to ADJUSTMENT [10/2014 - 09/2017]
	Cruise control switch circuit	Refer to Cruise Control Switch Circuit [10/2014 - 09/2017]
	Wiper signal circuit	Refer to Wiper Signal Circuit [10/2014 - 09/2017]
	Hybrid transaxle system	Refer to ON-VEHICLE INSPECTION [10/2014 - ]
	Millimeter wave radar sensor assembly	Refer to REMOVAL [10/2014 - 09/2017]
	Integration control and panel assembly	Refer to REMOVAL [10/2014 - ]
	Combination meter assembly	Refer to REMOVAL [10/2014 - 09/2017]
	ECM	Refer to REMOVAL [10/2014 - ]
	Driving support ECU assembly	Refer to REMOVAL [10/2014 - 09/2017]
Hunting (vehicle speed does not stabilize) during constant speed control.	CAN communication system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 09/2017]
	Electronically controlled brake system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 05/2019]
	Millimeter wave radar sensor assembly is dirty	-
	ECM	Refer to REMOVAL [10/2014 - ]
	Driving support ECU assembly	Refer to REMOVAL [10/2014 - 09/2017]
Hunting (vehicle speed does not stabilize) during vehicle-to-vehicle control.	CAN communication system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 09/2017]
	Electronically controlled brake system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 05/2019]
	ECM	Refer to REMOVAL [10/2014 - ]
	Driving support ECU assembly	Refer to REMOVAL [10/2014 - 09/2017]
Cannot cancel by CANCEL switch operation.	Cruise control switch circuit	Refer to Cruise Control Switch Circuit [10/2014 - 09/2017]
Cannot cancel by CANCEL switch operation.	ECM	Refer to REMOVAL [10/2014 - ]
Cannot cancel by shift lever operation.	Hybrid transaxle system	Refer to ON-VEHICLE INSPECTION [10/2014 - ]
	Shift lock control unit assembly	Refer to REMOVAL [10/2014 - ]
	Shift lever position sensor	Refer to REMOVAL [10/2014 - ]
	ECM	Refer to REMOVAL [10/2014 - ]
Cannot cancel by brake operation.	Stop light switch circuit	Refer to DTC C1A4B: Stop Light Relay Circuit [10/2014 - 09/2017]
Cannot cancel by brake operation.	Driving support ECU assembly	Refer to REMOVAL [10/2014 - 09/2017]
Cannot cancel by wiper HI operation.	Wiper signal circuit	Refer to Wiper Signal Circuit [10/2014 - 09/2017]
	ECM	Refer to REMOVAL [10/2014 - ]
	Driving support ECU assembly	Refer to REMOVAL [10/2014 - 09/2017]
Control cannot be canceled while vehicle is stopped.	Seat belt warning system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - ]
	Theft deterrent system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - ]
	Door courtesy switch circuit	Refer to Door Courtesy Switch Circuit [10/2014 - ]
	Back door courtesy switch circuit	Refer to Back Door Courtesy Switch Circuit [10/2014 - 05/2019]
Even though the millimeter wave radar sensor is not dirty, "Clean Sensor" is displayed.	Millimeter wave radar sensor assembly	Refer to REMOVAL [10/2014 - 09/2017]
The warning buzzer does not sound.	Skid control buzzer circuit	Refer to DTC C1A4A: Skid Control Buzzer Circuit [10/2014 - 09/2017]
	Check millimeter wave radar sensor assembly installation position	Refer to INSTALLATION [10/2014 - 09/2017]
	Millimeter wave radar sensor assembly	Refer to REMOVAL [10/2014 - 09/2017]
	Driving support ECU assembly	Refer to REMOVAL [10/2014 - 09/2017]
Even though the proximity warning buzzer sounds, brake control is not performed (when decelerating).	CAN communication system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 09/2017]
	Electronically controlled brake system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2014 - 05/2019]
	ECM	Refer to REMOVAL [10/2014 - ]
	Driving support ECU assembly	Refer to REMOVAL [10/2014 - 09/2017]
Cruise control SET indicator light is not displayed (during cruise control).	Cruise set indicator light circuit	Refer to Cruise SET Indicator Light Circuit [10/2014 - 09/2017]
	Combination meter assembly	Refer to REMOVAL [10/2014 - 09/2017]
	Driving support ECU assembly	Refer to REMOVAL [10/2014 - 09/2017]
Cruise control indicator light continues to display.	Driving support ECU assembly	Refer to REMOVAL [10/2014 - 09/2017]
Nothing displayed on the multi-information display in combination meter assembly.	Combination meter assembly	Refer to REMOVAL [10/2014 - 09/2017]
Even though cruise control system is canceled, buzzer does not sound.	Combination meter assembly	Refer to REMOVAL [10/2014 - 09/2017]
Even though the electric parking brake is operating, control cannot be canceled (w/ Full-speed Following Function).	Parking brake ECU assembly	Refer to REMOVAL [10/2014 - 05/2019]
	Driving support ECU assembly	Refer to REMOVAL [10/2014 - 09/2017]