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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 36 (Electronically Controlled Brake System (HV) - Diagnostic Codes (06 Of 11)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC C123D-00: IG2 Malfunction [12/2019 - 11/2023] >> Monitor Description

Monitor Description

WARNING: This page is about a different variant/trim than selected.

During normal operation, the voltage at IG1 and IG2 change mutually; however, if the voltages do not change mutually such as when IG1 is on and IG2 is off, the No. 2 skid control ECU (brake actuator assembly) judges that there is an open in the IG2 circuit and illuminates the MIL and stores this DTC.

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