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Home >> Lexus >> 2019 >> ES 350 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 107 (Electronically Controlled Brake System (Hybrid) - Diagnostic Codes (1 Of 5)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC C1203: ECM Communication Circuit [06/2018 - ] >> Monitor Description

Monitor Description

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When the vehicle is being driven, if the vehicle information, drive type or steering wheel position cannot be confirmed, the memorized data does not match or other related information cannot be stored such as when the ECU that was installed when the vehicle left the factory is changed or the EEPROM is malfunctioning, the skid control ECU (brake booster with master cylinder assembly) illuminates the MIL and stores this DTC.

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