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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Electronically Controlled Brake System (HV) - Diagnostic Codes (07 Of 11)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC C1256-09: Accumulator Low Pressure Abnormality Component Failure [10/2021 - 11/2023] >> Monitor Strategy

Monitor Strategy

WARNING: This page is about a different variant/trim than selected.
Related DTCs C1256: Brake booster motor pressure too low
Required Sensors/Components (Main) Brake booster with accumulator pump assembly
Brake actuator (brake booster with master cylinder assembly)
Required Sensors/Components (Related) No. 2 skid control ECU (brake actuator assembly)
Brake actuator (brake booster with master cylinder assembly)
Stop light switch assembly
Frequency of Operation Continuous
Duration 1.698 to 9 seconds (Time depends on auxiliary battery voltage): C1256 (Case 1-1)
3 seconds: C1256 (Case 1-2)
33 to 99 seconds (Time depends on auxiliary battery voltage): C1256 (Case 1-3)
MIL Operation Immediately
Sequence of Operation None
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