Lexus IS250 IS220d GSE20 ALE20 - CAN COMMUNICATION
CAN COMMUNICATION SYSTEM (for LHD) - FAIL-SAFE CHART
| FAIL-SAFE FUNCTION |
When communication fails in any of the CAN bus lines (communication lines), a fail-safe function(s) will operate. The fail-safe function that is specified for each system operates to prevent those systems from malfunctioning.
Effects on each system when communication is impossible. (For further details, see the pages for each system.)
| Function | ECM | Skid Control ECU | Steering Angle Sensor | Yaw Rate Sensor | Distance Control ECU | Condition when communication is impossible | DTC detection (Driver detectable) |
| VSC Control (Controls driving force while VSC is in operation) | ○ | ● | ○ | ○ | - | VSC function stops | Detectable (Light comes on) |
| Dynamic Radar Cruise (Maintains vehicle-to- vehicle distance) | ○ | ○ | - | - | ● | Vehicle-to-Vehicle distance control does not operate | Detectable (Light comes on) |
| Pre-crash Control (Requests braking and seat belt tightening when an unavoidable collision possibility is detected) | - | ○ | - | - | ○ | Pre-crash is inoperative | Detectable (Light comes on) |
| Electric power steering (Outputs the assist current) | ○ | ○ | ○ | - | - | Control continues with steering assist force based on a vehicle speed of 100 km/h (62.2 mile/h) or equivalent | Detectable (Light comes on) |
| Parking assist monitor system (exterior view from rear of vehicle while reversing) | ○ | - | ○ | - | - | Parking assist monitor system function stops | Detectable (recognized when vehicle direction is not displayed) |
| Meter Display (Displays operation condition and DTCs) | ○ | ○ | - | - | - | Light does not come on or remains on | Can be recognized due to abnormal operation of the light |
| Function | Seat belt control ECU | Gateway ECU | Power steering ECU | Television Camera ECU | Condition when communication is impossible | DTC detection (Driver detectable) |
| VSC Control (Controls driving force while VSC is in operation) | - | - | - | - | VSC function stops | Detectable (Light comes on) |
| Dynamic Radar Cruise (Maintains vehicle-to- vehicle distance) | ○ | - | - | - | Vehicle-to- Vehicle distance control does not operate | Detectable (Light comes on) |
| Pre-crash Control (Requests braking and seat belt tightening when an unavoidable collision possibility is detected) | ● | - | - | - | Pre-crash is inoperative | Detectable (Light comes on) |
| Electric power steering (Outputs the assist current) | - | - | ● | - | Control continues with steering assist force based on a vehicle speed of 100 km/h (62.2 mile/h) or equivalent | Detectable (Light comes on) |
| Parking assist monitor system (exterior view from rear of vehicle while reversing) | - | - | - | ● | Parking assist monitor system function stops | Detectable (recognized when vehicle direction is not displayed) |
| Meter Display (Displays operation condition and DTCs) | - | ● (Meter) | - | ○ | Light does not come on or remains on | Can be recognized due to abnormal operation of the light |
- HINT:
●: Control master
○: System related
LEXUS IS250, IS220d / GSE20 ALE20