LEXUS PARKING ASSIST-SENSOR SYSTEM 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.

General
Symptom	Suspected Area	See page
System does not operate at all (self-check function does not operate)	Clearance warning ECU power source circuit	Click here
	Clearance sonar main switch circuit	Click here
	Vehicle wire harness or connector (BEAN communication)	Click here
	Clearance warning ECU	Click here
	Satellite switch (clearance sonar main switch)	Click here
	Combination meter	Click here

Sonar Function
Symptom	Suspected Area	See page
Ultrasonic sensor (clearance sonar) does not operate (self-check function operates normally)	Front left sensor (ultrasonic sensor) malfunction	Click here
	Front right sensor (ultrasonic sensor) malfunction	Click here
	Rear left sensor (ultrasonic sensor) malfunction	Click here
	Rear right sensor (ultrasonic sensor) malfunction	Click here
	Clearance warning ECU	Click here
Ultrasonic sensor (back sonar) does not operate (self-check function operates normally)	Rear left center sensor (ultrasonic sensor) malfunction	Click here
	Rear right center sensor (ultrasonic sensor) malfunction	Click here
	Clearance warning ECU	Click here
Open circuit is displayed in self-check function	Front left sensor (ultrasonic sensor) malfunction	Click here
	Front right sensor (ultrasonic sensor) malfunction	Click here
	Rear left sensor (ultrasonic sensor) malfunction	Click here
	Rear right sensor (ultrasonic sensor) malfunction	Click here
	Rear left center sensor (ultrasonic sensor) malfunction	Click here
	Rear right center sensor (ultrasonic sensor) malfunction	Click here
	Clearance warning ECU	Click here
Combination meter (shift indicator) operates normally, but detection operates when shift lever in P, or detection does not operate when shift lever is not in P	Vehicle wire harness or connector (BEAN communication)	Click here
	Clearance warning ECU	Click here
Combination meter (speedometer) operates normally, but errors occur when vehicle speed exceeds 6 mph (10 km/h)	Vehicle wire harness or connector (BEAN communication)	Click here
	Clearance warning ECU	Click here
	Combination meter	Click here
Combination meter (shift indicator) operates normally, but detection operates when shift lever is not in R, or does not operate with the shift lever in R (rear ultrasonic sensor)	Vehicle wire harness or connector (BEAN communication)	Click here
	Clearance warning ECU	Click here
Freeze condition is displayed in self-check function	Remove ice, mud or snow from the ultrasonic sensor	-

Buzzer Function
Symptom	Suspected Area	See page
Sonar detection operation is normal but buzzer operation is intermittent	No. 1 clearance warning buzzer circuit	Click here
	Clearance warning ECU	Click here

Display Function
Symptom	Suspected Area	See page
Detection operation is normal but sonar displays of multi-information display do not appear	Vehicle wire harness or connector (BEAN communication)	Click here
	Clearance warning ECU	Click here
	Combination meter	Click here
Detection operation is normal but sonar displays of display and navigation module display do not appear*1	Vehicle wire harness or connector (BEAN communication)	Click here
	Clearance warning ECU	Click here
	Display and navigation module display	Click here

*1: w/ Navigation System