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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 34 (Electronically Controlled Brake System (HV) - Diagnostic Codes (05 Of 11)) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for HV Model) >> DTC C0540-16: Brake Pressure Sensor "A" Circuit Voltage Below Threshold; DTC C0540-1F: Brake Pressure Sensor "A" Circuit Intermittent; DTC C0540-29: Brake Pressure Sensor "A" Signal Invalid; DTC C0540-31: Brake Pressure Sensor "A" No Signal; DTC C0540-96: Brake Pressure Sensor "A" Component Internal Failure; DTC C122D-16: Brake Pressure Sensor "A" Supply Voltage Circuit Voltage Below Threshold; DTC C122D-17: Brake Pressure Sensor "A" Supply Voltage Circuit Voltage Above Threshold [12/2019 - ] >> Typical Malfunction Thresholds

Typical Malfunction Thresholds

WARNING: This page is about a different variant/trim than selected.
C053D (CASE 2)

Master cylinder pressure sensor Less than -0.744 MPa (-7.6 kgf/cm2 , -107 psi)
C0540 (CASE 1)

Master cylinder pressure sensor communication Invalid
C0540 (CASE 2)

Master cylinder pressure sensor level Higher than 23.328 MPa (237.9 kgf/cm2 , 3383 psi)
C0540 (CASE 3)

Master cylinder pressure sensor temperature level Higher than 150°C (302°F)
C0540 (CASE 4)

Brake booster pressure sensor data Invalid
C056B

Difference current master cylinder pressure and last master cylinder pressure Higher than 15 MPa (153.0 kgf/cm2 , 2175 psi)
C122E

Master cylinder pressure sensor power supply voltage 6.5 V or less
C122F

One of the following conditions is met -
Master cylinder pressure sensor power supply voltage Higher than 7.5 V
Master cylinder pressure sensor temperature Higher than 175°C (347°F)
Master cylinder pressure sensor current Higher than 50 mA
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