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Home >> Lexus >> 2022 >> LS 500h AWD >> 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] >> Typical Malfunction Thresholds

Typical Malfunction Thresholds

All of the following conditions are met A and B
A. Test mode Off
B. One of the following conditions is met -
Grade information Undetermined or different from a storage memory
Drive train information Undetermined or different from a storage memory
Steering wheel information Undetermined or different from a storage memory
Vehicle spec information There is no write-in