TOYOTA PARKING ASSIST-SENSOR SYSTEM(for 8 Sensor Type) PROBLEM SYMPTOMS TABLE

Tip:

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

Table 1. General
Symptom	Suspected Area	Link
System does not operate at all (self-check function does not operate)	Proceed to "Clearance Warning ECU Power Source Circuit"	Click here
	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Clearance warning ECU assembly (for LHD)	Click here
	Clearance warning ECU assembly (for RHD)	Click here
System cannot be turned off	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Clearance warning ECU assembly (for LHD)	Click here
	Clearance warning ECU assembly (for RHD)	Click here

Table 2. Sonar Function
Symptom	Suspected Area	Link
Frozen indication is displayed	Proceed to "Sensor Frozen Indication (Dirty or Frozen)"	Click here
Combination meter assembly (shift indicator) operates normally, but detection operates when shift lever is in P, or detection does not operate when shift lever is in any position except P (front ultrasonic sensor)	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Clearance warning ECU assembly (for LHD)	Click here
	Clearance warning ECU assembly (for RHD)	Click here
Combination meter assembly (shift indicator) operates normally, but detection operates when shift lever is in any position except R or does not operate with the shift lever in R (rear ultrasonic sensor)	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Clearance warning ECU assembly (for LHD)	Click here
	Clearance warning ECU assembly (for RHD)	Click here
Detection operation operates even when vehicle speed exceeds operation condition speed	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Clearance warning ECU assembly (for LHD)	Click here
	Clearance warning ECU assembly (for RHD)	Click here

Table 3. Buzzer Function
Symptom	Suspected Area	Link
Sonar detection operation is normal but buzzer operation is intermittent	Cheak that the temporarily mute function is not in operation	-
	Proceed to "Clearance Warning Buzzer Circuit"	Click here
	Clearance warning ECU assembly (for LHD)	Click here
	Clearance warning ECU assembly (for RHD)	Click here

Table 4. Display Function
Symptom	Suspected Area	Link
Detection operation is normal but clearance sonar indicator does not illuminate	Combination meter assembly	Click here
Detection operation is normal but no sonar displays appear	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Clearance warning ECU assembly (for LHD)	Click here
	Clearance warning ECU assembly (for RHD)	Click here
Detection operation is normal but sonar displays of multi-information display do not appear	Combination meter assembly	Click here
	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Clearance warning ECU assembly (for LHD)	Click here
	Clearance warning ECU assembly (for RHD)	Click here
Detection operation is normal but sonar displays of multi-display do not appear	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Navigation receiver assembly (w/ Navigation System)	Click here
	Radio and display receiver assembly (w/ Audio and Visual System [for Radio and Display Type])	Click here
	Clearance warning ECU assembly (for LHD)	Click here
	Clearance warning ECU assembly (for RHD)	Click here