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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 C1020-00: Ignition Switch On/Start Position Malfunction [11/2023 - ] >> Monitor Description

Monitor Description

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

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