Lexus IS250 IS220d GSE20 ALE20 - CRUISE CONTROL
DYNAMIC RADAR CRUISE CONTROL SYSTEM - SYSTEM DIAGRAM
| Sender ECU | Receiver ECU | Signal | Line |
| ECM | Distance Control ECU (Cruise Control ECU) | A/T transmission signal Cruise control operation signal Accelerator pedal idle signal Set vehicle distance signal Brake demand response signal Stored vehicle speed signal Current vehicle speed signal Cruise control switch signal Brake control operation signal Cruise control demand torque signal Dynamic radar cruise designation signal Brake control interrupting signal Cruise control demand opening angle signal | CAN |
| Distance Control ECU (Cruise Control ECU) | ECM | Millimeter wave radar sensor beam axis deviation signal Millimeter wave radar sensor malfunction signal Dirt present on millimeter wave radar sensor signal Bad weather detection signal Communication error signal (from distance control ECU to millimeter wave radar sensor) Communication error signal (from ECM to distance control ECU) Communication error signal (from skid control ECU to distance control ECU) Yaw rate communication error signal Steering angle sensor communication error signal Distance control ECU voltage signal Dynamic radar cruise designation response signal Estimated vehicle speed signal Vehicle-to-vehicle distance signal Vehicle-to-vehicle distance control signal Brake control demand signal Throttle fully closed demand signal Approach warning signal (Skid control buzzer demand signal) Cruise target deceleration gradient signal Vehicle-to-vehicle distance control acceleration signal | CAN |
| ECM | Skid Control ECU | Cruise target deceleration gradient signal Cruise target deceleration signal Throttle fully closed demand signal Brake control demand signal Cruise control operation signal | CAN |
| Skid Control ECU | Distance Control ECU (Cruise Control ECU) | Wheel speed signal Speed sensor power drop signal Speed sensor condition signal Yaw rate sensor signal Yaw rate sensor zero point error signal | CAN |
| Skid Control ECU | ECM | Brake component malfunction signal Brake control malfunction signal Drive wheel slip signal Cruise control cancel signal Skid control buzzer malfunction signal Communication logic error signal (from ECM to skid control ECU) Brake demand response signal Brake control interrupting signal Brake control operation signal | CAN |
| Steering Angle Sensor | Distance Control ECU (Cruise Control ECU) | +B open circuit malfunction signal Sensor malfunction signal Steering angle signal Sensor zero point signal | CAN |
| Yaw Rate Sensor | Distance Control ECU (Cruise Control ECU) | Yaw rate sensor signal Yaw rate sensor voltage signal | CAN |
| ECM | Combination Meter (Meter ECU) | Cruise control diagnosis signal (DTC) Preceding vehicle detection signal Approach warning signal Vehicle-to-vehicle distance signal Dirt present on millimeter wave radar sensor signal Bad weather detection signal Vehicle-to-vehicle distance control signal Vehicle-to-vehicle distance control check mode signal Vehicle-to-vehicle distance control standby condition signal Constant speed cruise signal CRUISE indicator operation signal Cruise control warning signal Dynamic radar cruise warning signal Cruise control vehicle speed signal | CAN BEAN (Instrument Panel Bus) |
| Distance Control ECU (Cruise Control ECU) | Combination Meter (Meter ECU) | Millimeter wave radar sensor beam axis deviation signal Vehicle-to-vehicle distance signal Preceding vehicle detection signal | CAN BEAN (Instrument Panel Bus) |
| Cowl Side J/B RH ECU | ECM | ECT SNOW mode switch signal | CAN BEAN (Instrument Panel Bus) |
| Rain Sensor | Distance Control ECU (Cruise Control ECU) | HI operation signal | CAN BEAN (Door Bus) |
| Combination Switch | Distance Control ECU (Cruise Control ECU) | Turn switch signal Windshield wiper switch position signal | CAN BEAN (Steering Column Bus) |
| Steering Pad Switch (Distance Control Switch) | ECM | Steering pad switch (Distance control switch) signal | CAN BEAN (Steering Column Bus) |