Home

Toyota Workshop

GSIC - Global Service Information Center

INTELLIGENT PARKING ASSIST SYSTEM > PROBLEM SYMPTOMS TABLE

for Preparation Click here

NOTICE:

The following inspection procedure of the intelligent parking assist is described on the assumption that the navigation system is normal. If navigation system has any malfunction, first proceed with troubleshooting of the navigation system.

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.

General
Symptom	Suspected Area	See page
When reverse (R) has been selected, the intelligent parking assist image is not displayed (navigation display is still displayed).	Proceed to "ECU Power Source Circuit"	Click here
	Reverse signal circuit (Navigation System)	Click here
	Navigation ECU sub-assembly	Click here
	Parking assist ECU	Click here
When reverse (R) has been selected, the intelligent parking assist image is not displayed (screen is black).	Proceed to "Image from Camera for Intelligent Parking Assist is Abnormal"	Click here

Display Malfunction
Symptom	Suspected Area	See page
Image from camera for the intelligent parking assist is abnormal.	Proceed to "Image from Camera for Intelligent Parking Assist is Abnormal"	Click here
	Parking assist ECU	Click here

Switch Malfunction
Symptom	Suspected Area	See page
The illumination of the parking assist pre support switch assembly does not illuminate.	Parking assist pre support switch assembly inspection	Click here
	Harness or connector	-
The touch switches on the navigation ECU sub-assembly display do not operate at all.	Touch SW inspection (Navigation System)	Click here
	Navigation ECU sub-assembly	Click here
	Parking assist ECU	Click here

Pre Support Function Malfunction
Symptom	Suspected Area	See page
Pre support function does not operate.	Pre support function operation condition (System Description)	Click here
	Signal check (Diagnosis System)	Click here
	Parking assist ECU	Click here
When the target parking position is set after pre support operation, the initial display position of the target parking space is very far from the actual parking space.	Pre support function (System Description)	Click here
	Notes for ultrasonic sensor (Precaution)	Click here
	Ultrasonic sensor	Click here
	Front bumper cover	Click here
	Parking assist ECU	Click here
"Check IPA System. Have your vehicle checked by a dealer." is displayed on the pre support screen.	Parking assist ECU	Click here
	Signal check (Diagnosis system)	Click here
"IPA not available now." is displayed on the pre support screen.	Parking assist ECU	Click here
"IPA not available now." is displayed on the pre support screen though the steering angle neutral point has been corrected.	Spiral cable with sensor sub-assembly	Click here
	Steering angle setting (Diagnosis System)	Click here
	Parking assist ECU	Click here

Intelligent Parking Assist Function Malfunction
Symptom	Suspected Area	See page
The vehicle width extension lines do not overlap with the predicted path lines when the steering wheel is centered.	Check the installation of steering wheel	-
	Steering angle setting (Diagnosis System)	Click here
	Check the installation of rear television camera assembly	Click here
	Height control sensor vehicle height difference setting	Click here
	Rear television camera optical axis adjustment	Click here
	Parking assist ECU	Click here
The predicted path lines stop before the steering wheel is turned to the lock position.	Steering angle setting (Diagnosis System)	Click here
"Check IPA System. Have your vehicle checked by a dealer." is displayed on the intelligent parking assist screen.	Parking assist ECU	Click here
Projected course guide lines are not displayed on the intelligent parking assist screen.	Parking assist ECU	Click here
"System initializing." is displayed.	Correct the steering angle neutral point	Click here
"System initializing." is displayed though the steering angle neutral point has been corrected.	Spiral cable with sensor sub-assembly	Click here
	Steering angle setting (Diagnosis System)	Click here
	Parking assist ECU	Click here
"System not ready." is displayed.	Parking assist ECU initialization	Click here
"System not ready." is displayed though the parking assist ECU initialization has been performed.	Parking assist ECU	Click here
Assist operation stops frequently ("System cannot assist under current conditions." is displayed).	Inspect the tires (tire size, tire pressure, tire wear)	-
	Parking assist ECU	Click here
Assist operation stops frequently ("Use on flat surface." is displayed).	Parking assist ECU	Click here
The set parking position and actual parking position are misaligned either to the right or left in parallel parking mode.	Parallel parking offset (Diagnosis System)	Click here
A rear bumper edge and a bumper reference line swerve at the intelligent parking assist screen.	Check the installation of the rear television camera assembly	Click here
	Height control sensor vehicle height difference setting	Click here
	Rear television camera optical axis adjustment	Click here
Parts of the bumper reference line are not displayed.	Height control sensor vehicle height difference setting	Click here
Parts of the bumper reference line are not displayed.	Rear television camera optical axis adjustment	Click here
The vehicle does not move to the set parking position.	Vehicle does not move to set parking position	Click here
When the target parking position is set, the initial display position of the target parking space is very far from the actual parking position.	Notes for ultrasonic sensor (Precaution)	Click here
	Ultrasonic sensor	Click here
	Front bumper cover	Click here
	Parking assist ECU	Click here
"CHK" message(s) are displayed on the SIGNAL CHECK screen.	"CHK" message(s) are displayed on the SIGNAL CHECK screen	Click here
A back door open warning message is displayed even after the back door is closed.	"Message indicating back door is open is displayed even after back door is closed"	Click here

Guide Voice Malfunction
Symptom	Suspected Area	See page
The guide voice for the intelligent parking assist system is inaudible or too quiet (the voice for the navigation system is normal).	Check DTCs (Navigation System)	Click here
	Parking assist ECU	Click here
	Navigation ECU sub-assembly	Click here