Lexus IS250 IS220d GSE20 ALE20 - PARK ASSIST / MONITORING
CLEARANCE SONAR SYSTEM - PROBLEM SYMPTOMS TABLE
| Symptom | Suspected area | See page |
| System does not operate at all (self-check function does not operate) | Clearance warning ECU power source circuit | |
| Clearance sonar main switch (satellite switch) circuit | ||
| 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 | |
| Front right sensor (ultrasonic sensor) malfunction | ||
| Rear left sensor (ultrasonic sensor ) malfunction | ||
| Rear right sensor (ultrasonic sensor) malfunction | ||
| Clearance warning ECU | - | |
| Ultrasonic sensor (back sonar) does not operate (self-check function operates normally) | Rear left center sensor (ultrasonic sensor ) malfunction | |
| Rear right center sensor (ultrasonic sensor) malfunction | ||
| Clearance warning ECU | - | |
| Sonar detection operation is normal but buzzer operation is intermittent | 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) | |
| 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) | |
| Clearance warning ECU | - | |
| Multi-display | - | |
| Open circuit is displayed in self-check function | Front left sensor (ultrasonic sensor) malfunction | |
| Front right sensor (ultrasonic sensor) malfunction | ||
| Rear left sensor (ultrasonic sensor ) malfunction | ||
| Rear right sensor (ultrasonic sensor) malfunction | ||
| Rear left center sensor (ultrasonic sensor ) malfunction | ||
| Rear right center sensor (ultrasonic sensor) malfunction | ||
| Operating indicator does not illuminate | Clearance sonar main switch (satellite 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) | |
| Vehicle wire harness or connector (BEAN communication) | ||
| 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) | |
| 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) | |
| Buck-up light switch malfunction (for M/T model) | ||
| Vehicle wire harness or connector (BEAN communication) | ||
| Vehicle wire harness or connector (CAN communication (for A/T model)) | ||
| Clearance warning ECU | - |
LEXUS IS250, IS220d / GSE20 ALE20