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Home >> Toyota >> 2022 >> Avalon XLE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 103 (Electronically Controlled Brake System - Diagnostic Codes (C1202-C1300) (Hybrid)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC C1256: Accumulator Low Pressure [04/2018 -] >> Typical Enabling Conditions

Typical Enabling Conditions

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ALL

Monitor runs whenever the following DTCs are not stored C121E (Pump motor circuit high)
C14D0 (Accumulator pressure sensor voltage circuit check)
C14D1 (Accumulator pressure sensor lost communication)
C14D2 (Accumulator pressure sensor internal malfunction)
C14D3 (Accumulator pressure sensor intermittent/erratic)
C14D4 (Case 1) (Accumulator pressure sensor invalid data)
C14D4 (Case 2) (Accumulator pressure sensor intermittent)
CASE 1

All of the following conditions are met -
Accumulator pressure sensor fail Not detected
Accumulator pressure Less than 17.1 MPa (174.4 kgf/cm2 , 2480 psi)
Brake Off
Brake system voltage 1 (VM1) Higher than 6.92 V
CASE 2

All of the following conditions are met -
Accumulator pressure sensor fail Not detected
Accumulator pressure Less than 17.1 MPa (174.4 kgf/cm2 , 2480 psi)
Pump motor control circuit high Not detected
Brake Off
Brake system voltage 1 (VM1) Higher than 6.92 V
CASE 3

Both of the following conditions are met -
Accumulator pressure sensor fail Not detected
Accumulator pressure Less than 17.1 MPa (174.4 kgf/cm2 , 2480 psi)
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