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Home >> Toyota >> 2021 >> RAV4 LE, FWD >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System (W/O Vacuum Brake Booster) - Diagnostic Codes (4 Of 8) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Vacuum Brake Booster) >> DTC C124A-05: ECM Communication System Programming Failure [12/2021 - ] >> Monitor Description

Monitor Description

When one of the following conditions is met at a certain vehicle speed or more, the No. 2 skid control ECU (brake actuator assembly) judges that there is a learning malfunction, the MIL is illuminated and a DTC is stored.