TOYOTA 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.

TOYOTA Parking Assist-Sensor System
Symptom Suspected Area See page
System does not operate at all (Initial check function also does not operate) Proceed to "Clearance Warning ECU Power Source Circuit"

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Clearance warning ECU

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Although system operates, clearance warning buzzer does not sound Proceed to "Clearance Warning Buzzer Circuit"

Click here

Clearance warning ECU

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Rear corner and back sonar operates when shift lever is not in R, or does not operate even when shift lever is in R Initial check function

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Proceed to "Back Sonar Sensor LH Circuit"

Click here

Proceed to "Back Sonar Sensor RH Circuit"

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Proceed to "Rear Clearance Sonar Sensor LH Circuit"

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Proceed to "Rear Clearance Sonar Sensor RH Circuit"

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Proceed to "Reverse Signal Circuit"

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Clearance warning ECU

Click here

Detection operation is normal but back sonar or clearance sonar switch indicator does not illuminate Proceed to "Clearance Warning ECU Power Source Circuit"

Click here

Inspect back sonar or clearance sonar switch

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Clearance warning ECU

Click here