LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2007 >> IS 350 >> Repair and Diagnosis >> Accessories & Equipment >> Warning Systems >> Park Assist/Monitoring >> Intuitive Parking Assist System >> Problem Symptoms Table
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

Symptom Suspected area Reference
System does not operate at all (self-check function does not operate) Clearance Warning ECU Power Source Circuit Clearance Warning ECU Power Source Circuit 
Clearance sonar main switch circuit Clearance Sonar Main Switch Circuit 
Replace clearance warning ECU -
Satellite switch (clearance sonar main switch) -
Ultrasonic sensor (clearance sonar) does not operate (self-check function operates normally) Front left sensor (ultrasonic sensor) malfunction DTC B2232 Front Left Sensor Malfunction 
Front right sensor (ultrasonic sensor) malfunction DTC B2235 Front Right Sensor Malfunction 
Rear left sensor (ultrasonic sensor) malfunction DTC B2237 Rear Left Sensor Malfunction 
Rear right sensor (ultrasonic sensor) malfunction DTC B2241 Rear Right Sensor Malfunction 
Clearance warning ECU -
Ultrasonic sensor (back sensor) does not operate (self-check function operates normally) Rear left center sensor (ultrasonic sensor) malfunction DTC B2238 Rear Left Center Sensor Malfunction 
Rear right center sensor (ultrasonic sensor) malfunction DTC B2239 Rear Right Center Sensor Malfunction 
Clearance warning ECU -
Sonar detection operation is normal but buzzer operation is intermittent No. 1 clearance warning buzzer circuit No. 1 Clearance Warning Buzzer Circuit 
Clearance warning ECU -
Detection operation is normal but sonar displays of multi-information display do not appear Vehicle wire harness or connector (BEAN communication) SYSTEM DESCRIPTION
Clearance warning ECU -
Combination meter -
Detection operation is normal but sonar displays of multi-display do not appear Vehicle wire harness or connector (BEAN communication) SYSTEM DESCRIPTION
Clearance warning ECU -
Multi-display -
Open circuit is displayed in self-check function Front left sensor (ultrasonic sensor) malfunction DTC B2232 Front Left Sensor Malfunction 
Front right sensor (ultrasonic sensor) malfunction DTC B2235 Front Right Sensor Malfunction 
Rear left sensor (ultrasonic sensor) malfunction DTC B2237 Rear Left Sensor Malfunction 
Rear right sensor (ultrasonic sensor) malfunction DTC B2241 Rear Right Sensor Malfunction 
Rear left center sensor (ultrasonic sensor) malfunction DTC B2238 Rear Left Center Sensor Malfunction 
Rear right center sensor (ultrasonic sensor) malfunction DTC B2239 Rear Right Center Sensor Malfunction 
Operating indicator does not illuminate Clearance sonar main switch (satellite switch) circuit Clearance Sonar Main Switch Circuit 
Satellite switch (clearance sonar main switch) -
Freeze condition is displayed in self-check function Remove ice, mud or snow from the ultrasonic sensor -
Combination meter operates normally, but detection operates when shift lever position is P, or detection does not operate when shift lever is not on P Park/neutral position switch malfunction (for A/T model) INSPECTION
Vehicle wire harness or connector (BEAN communication) SYSTEM DESCRIPTION
Clearance warning ECU -
Combination meter operates normally but errors occur when vehicle speed exceeds 6 mph (10 km/h) Vehicle wire harness or connector (BEAN communication) SYSTEM DESCRIPTION
Clearance warning ECU -
Combination meter -
The system operates with the shift lever not in R, or does not operate with the shift lever is R position (rear ultrasonic sensor) Park/neutral position switch malfunction (for A/T model) INSPECTION
Back-up light switch malfunction (for M/T model) INSPECTION
Vehicle wire harness or connector (BEAN communication) SYSTEM DESCRIPTION
Vehicle wire harness or connector (CAN communication (for A/T model)) SYSTEM DESCRIPTION
Clearance warning ECU -