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Home >> Lexus >> 2019 >> ES 350 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 107 (Electronically Controlled Brake System (Hybrid) - Diagnostic Codes (1 Of 5)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC C120F: Open in Master Reservoir Level Switch Circuit [06/2018 - ] >> Monitor Description

Monitor Description

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When the voltage at terminal LBL of the skid control ECU (brake booster with master cylinder assembly) is a specific value or more (open circuit judgment range) for a certain amount of time, the skid control ECU (brake booster with master cylinder assembly) judges that there is an open in the fluid warning switch circuit and illuminates the MIL and stores this DTC.

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