TOYOTA PARKING ASSIST-SENSOR SYSTEM(except Hatchback) PROBLEM SYMPTOMS TABLE

Tech Tips

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 an open circuit indication is displayed by the self-check function, check for DTCs and troubleshoot according to each inspection procedure.

General
Symptom	Suspected Area	Link
System does not operate at all	Proceed to "Clearance Warning ECU Power Source Circuit"	Click here
	Proceed to "Clearance Sonar Main Switch Circuit"	Click here
	Clearance warning ECU assembly*1	Click here
	Clearance warning ECU assembly*2	Click here
System can not be turned off	Proceed to "Clearance Sonar Main Switch Circuit"	Click here
	Clearance warning ECU assembly*1	Click here
	Clearance warning ECU assembly*2	Click here

Sonar Function
Symptom	Suspected Area	Link
Combination meter assembly (shift selection) operates normally, but detection operates when park (P) has been selected, or detection does not operate when a shift state other than park (P) has been selected (front sonar)	CAN communication system	Click here
	Clearance warning ECU assembly*1	Click here
	Clearance warning ECU assembly*2	Click here
Combination meter assembly (shift selection) operates normally, but detection operates when a shift state other than reverse (R) has been selected, or does not operate with reverse (R) selected (rear sonar)	CAN communication system	Click here
	Clearance warning ECU assembly*1	Click here
	Clearance warning ECU assembly*2	Click here
Combination meter assembly (speedometer) operates normally, but detection does not operate when vehicle speed satisfies operation condition, or detection operates when vehicle speed does not satisfy operation condition (front sonar)	CAN communication system	Click here
	Clearance warning ECU assembly*1	Click here
	Clearance warning ECU assembly*2	Click here

Buzzer Function
Symptom	Suspected Area	Link
Sonar detection operation is normal but buzzer operation is intermittent	Proceed to "Clearance Warning Buzzer Circuit"	Click here
	Clearance warning ECU assembly*1	Click here
	Clearance warning ECU assembly*2	Click here

Display Function
Symptom	Suspected Area	Link
Detection operation is normal but sonar displays of multi-information display do not appear	CAN communication system	Click here
	Combination meter assembly	Click here
	Clearance warning ECU assembly*1	Click here
	Clearance warning ECU assembly*2	Click here