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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 (2 Of 3) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Advanced Park) >> DTC C1256: Accumulator Low Pressure [10/2020 - 10/2023] >> Monitor Strategy

Monitor Strategy

Related DTCs C1256: Accumulator pressure too low
Required Sensors/Components (Main) brake booster with accumulator pump assembly
Brake actuator assembly
Required Sensors/Components (Related) Skid control ECU assembly
Brake actuator assembly
Stop light switch assembly
Brake booster with accumulator pump assembly
Brake pedal stroke sensor assembly
Frequency of Operation Continuous
Duration 1.7 to 9 seconds (Time depends on accumulator pump motor voltage): C1256 (Case 1)
3 seconds: C1256 (Case 2)
33 to 99 seconds (Time depends on accumulator pump motor voltage): C1256 (Case 3)
MIL Operation Immediately
Sequence of Operation None