LEXUS PARKING ASSIST-SENSOR SYSTEM PROBLEM SYMPTOMS TABLE

Note

The vehicle is equipped with a Supplemental Restraint System (SRS) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the precaution for Supplemental Restraint System.

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After turning the engine switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

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When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

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 or frozen 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	CAN communication system	Click here
	Meter / gauge system	Click here
	Proceed to "Clearance Warning ECU Power Source Circuit"	Click here
	Steering pad switch assembly	Click here
	Spiral with sensor cable sub-assembly	Click here
	Clearance warning ECU assembly	Click here
System cannot be turned off	CAN communication system	Click here
	Meter / gauge system	Click here
	Data List / Active Test (Clearance Sonar ECU)	Click here
	Steering pad switch assembly	Click here
	Spiral with sensor cable sub-assembly	Click here
	Clearance warning ECU assembly	Click here

Sensor Function
Symptom	Suspected Area	Link
Frozen indication is displayed in self-check function.	Proceed to "Sensor Frozen Indication (Dirty or Frozen)"	Click here
Combination meter assembly (shift selection) operates normally, but detection operates when shift position is in P, or detection does not operate when shift position is in any position other than P (front sensor)	CAN communication system	Click here
	Clearance warning ECU assembly	Click here
Combination meter assembly (shift selection) operates normally, but detection operates when shift position is not in R, or does not operate with shift position in R (rear sensor)	CAN communication system	Click here
	Clearance warning ECU assembly	Click here
Combination meter assembly (speedometer) operates normally, but detection does not operate when vehicle speed meets operation condition, or detection operates when vehicle speed does not meet operation condition (front sensor)	CAN communication system	Click here
	Clearance warning ECU assembly	Click here

Buzzer Function
Symptom	Suspected Area	Link
Sensor detection operation is normal but buzzer operation is intermittent	Check that the temporary mute function is not operating	-
	Proceed to "Clearance Warning Buzzer Circuit"	Click here

Display Function
Symptom	Suspected Area	Link
Detection operation is normal but clearance sonar indicator does not illuminate	CAN communication system	Click here
	Combination meter assembly: Perform Active Test (Indicat. Clearance Sonar LCD)	Click here
	Combination meter assembly	Click here
	Clearance warning ECU assembly	Click here
Detection operation is normal but all sensor displays do not appear	CAN communication system	Click here
	Clearance warning ECU assembly	Click here
Detection operation is normal but sensor displays do not appear on multi-information display	CAN communication system	Click here
	Combination meter assembly	Click here
	Clearance warning ECU assembly	Click here
Detection operation is normal but sensor displays do not appear on the multi-display	CAN communication system	Click here
	Multi-display	Click here
	Television camera assembly	Click here
	Clearance warning ECU assembly	Click here
Detection operation is normal but sensor displays do not appear on the headup display (meter mirror sub-assembly)*	CAN communication system	Click here
	Headup display system	Click here
	Clearance warning ECU assembly	Click here