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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 34 (Electronically Controlled Brake System (HV) - Diagnostic Codes (05 Of 11)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC C0594-00: Brake Booster Motor "A" Performance [11/2023 - ] >> Monitor Description

Monitor Description

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The No. 2 skid control ECU (brake actuator assembly) monitors the voltage of the pump motor.

When the voltage of the pump motor is practically equal to that when on for a long period of time, the No. 2 skid control ECU (brake actuator assembly) judges that the pump motor is operating for an abnormally long time and illuminates the MIL and stores a DTC.

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