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Home >> Lexus >> 2021 >> LS 500h RWD >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System (W/O Advanced Park) - Diagnostic Codes (1 Of 3) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Advanced Park) >> DTC C1203: ECM Communication Circuit Malfunction [10/2020 - 10/2023] >> Component Operating Range

Component Operating Range

All of the following conditions are met -
Test Mode Off
EEPROM read-in Complete
Grade information Decision and Concordance from a storage memory
Drive train information Decision and Concordance from a storage memory
Steering wheel information Decision and Concordance from a storage memory
Vehicle spec information There is write-in