Lexus IS250 IS220d GSE20 ALE20 - PARK ASSIST / MONITORING
PARKING ASSIST MONITOR SYSTEM - FAIL-SAFE CHART
If the television camera ECU detects a malfunction, the fail safe functions shown in the table below operate.
| Malfunction parts | Detecting condition | Function "Manual Assist Mode" | Function "Parallel Parking Assist Mode" |
| Steering angle sensor | Transmission of sensor malfunction signal Open circuit in sensor signal | - | Switches to the "Manual Assist Mode" automatically |
| Transmission of neutral steering point correction incomplete signal. | - | Displays "System initializing" | |
| Communication malfunction between the steering angle sensor and television camera ECU | - | Switches to the "Manual Assist Mode" automatically | |
| Television camera assembly | Transmission of television camera malfunction signal | Stop signal reception and display a dark screen | |
| Television camera ECU | Malfunction of television camera ECU unit | Stops system operation | |
| Navigation ECU | No response from navigation ECU Transmission of navigation ECU malfunction signal | - | Switches to the "Manual Assist Mode" automatically |
LEXUS IS250, IS220d / GSE20 ALE20