Lexus IS250 IS220d GSE20 ALE20 - DOOR LOCK
ENTRY AND START SYSTEM - SYSTEM DIAGRAM
| Transmitting ECU (Transmitter) | Receiving ECU | Signals | Communication method |
| Combination meter | Certification ECU | Vehicle speed signal | BEAN |
| Power source control ECU | Certification ECU | Alarm control signal Power source control ECU information | BEAN |
| Certification ECU | Combination meter | Shift position warning signal (A/T) "Single beep" sound control signal "Intermittent beep" sound control signal "Beep buzzer" sound control signal | BEAN |
| Main body ECU RH | Certification ECU | Door lock / unlock position signal Courtesy light switch signal Alarm signal Destination signal Vehicle type handle signal Door electrical key operation switch signal Door lock output operate signal Wireless door lock/unlock signal DTC erase signal DTC response signal | BEAN |
| ECM | Certification ECU | Engine speed signal | BEAN/CAN |
| ID code box | Certification ECU | Matching request random number signal EEP ROM access malfunction Model code matching signal Model code mismatching signal ECM code receiving status Engine start permission request signal Engine start permission response signal S code matching result signal S code registration status signal S code registration mode signal L code matching result signal ECM communication signal The number of registered key response signal Diagnosis mode switching signal The number of registered key signal | LIN |
| Certification ECU | ID code box | 3 bit code request signal ID code matching result signal The number of registered key signal Vehicle type handle signal | LIN |
| ID code box | Certification ECU Steering lock ECU | L code registration mode signal Diagnosis mode request signal DTC clear request signal L code registration status signal | LIN |
| Steering lock ECU | Certification ECU ID code box | Steering lock request signal Steering unlock signal Steering lock confirmation Steering unlock confirmation Diagnosis response signal Steering unlock drive relay signal Steering lock drive relay signal Steering lock motor operation signal | LIN |
| Power source control ECU | Certification ECU | Shift position P signal (A/T) Power ON operation status signal Engine starting status ACC relay operating status IG relay operating status | LIN |
| Power source control ECU | Steering lock ECU | Steering lock relay power supply status | LIN |
| Steering lock ECU | Certification ECU Power source control ECU | Steering lock catching malfunction signal Push button start malfunction signal Engine operation signal | LIN |