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Home >> Lexus >> 2022 >> LS 500h AWD >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System (W/O Advanced Park) - Diagnostic Codes (1 Of 3) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Advanced Park) >> DTC C1202: Master Reservoir Level Malfunction [10/2020 - 10/2023] >> Typical Malfunction Thresholds

Typical Malfunction Thresholds

C1202 (CASE 1)

All of the following conditions are met -
Brake fluid level warning switch (brake master cylinder reservoir assembly) state for 10 seconds or more On
Brake booster with accumulator pump assembly operation for 10 seconds or more On
Brake On
C1202 (CASE 2)

Both of the following conditions are met -
Brake fluid level warning switch (brake master cylinder reservoir assembly) remains on after skid control ECU power on On
Brake On
C120F

Brake fluid level warning switch (brake master cylinder reservoir assembly) voltage Higher than 4.07 V, and less than 7.5 V
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