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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 106 (Electronically Controlled Brake System (HV) - Diagnostic Codes (01 Of 11)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC C0078-00: Different Diameter Tire [11/2023 - ] >> Monitor Description

Monitor Description

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The No. 2 skid control ECU (brake actuator assembly) monitors the output of the speed sensor. When there is a large difference between the output values of the speed sensors on the front wheels and rear wheels, the MIL is illuminated and a DTC is stored.

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