DSD Information System
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 Enabling Conditions

Typical Enabling Conditions

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

Monitor runs whenever the following DTCs are not stored C0540 (Case 1): Pressure sensor verify communication
C0540 (Case 2 to 4): Pressure sensor range check
C056B: Pressure sensor intermittent/erratic
C1103 (Case 1): Brake pedal position sensor voltage circuit/open
C1103 (Case 2): Brake pedal position sensor invalid data
C122E: Pressure sensor input out of range low
C122F: Pressure sensor input out of range high
P057A: Brake pedal position sensor invalid data
P05DB: Brake pedal position sensor invalid data
P05DD: Brake pedal position sensor open circuit
P05DE: Brake pedal position sensor circuit high
P05DF: Brake pedal position sensor intermittent/erratic
P05E0: Brake pedal position sensor "A"/"B" correlation
Pressure sensor fail (C0540, C122F, C056B) Not detected
C0540 (CASE 1)

Monitor runs whenever the following DTCs are not stored C122E: Pressure sensor input out of range low
C122F: Pressure sensor input out of range high
Both of the following conditions are met -
Master cylinder pressure sensor power supply effective invalidity Valid
Master cylinder pressure sensor power supply voltage Higher than 6.5 V, and less than 7.5 V
C0540 (CASE 2 AND 3)

Monitor runs whenever the following DTCs are not stored C0540 (Case 1): Pressure sensor verify communication
C122E: Pressure sensor input out of range low
C122F: Pressure sensor input out of range high
All of the following conditions are met -
Master cylinder pressure sensor communication Valid
Master cylinder pressure sensor power supply effective invalidity Valid
Master cylinder pressure sensor power supply voltage Higher than 6.5 V
C0540 (CASE 4)

Monitor runs whenever the following DTCs are not stored C0540 (Case 1): Pressure sensor verify communication
C0540 (Case 2 and 3): Pressure sensor range check
C056B: Pressure sensor intermittent/erratic
C122E: Pressure sensor input out of range low
C122F: Pressure sensor input out of range high
All of the following conditions are met -
+BS voltage Less than 8.5 V
Master cylinder pressure sensor temperature Less than 175°C (347°F)
Master cylinder pressure sensor current Less than 0.05 A
Master cylinder pressure sensor power supply voltage Higher than 6.5 V, and less than 7.5 V
C056B

Monitor runs whenever the following DTCs are not stored C0540 (Case 1): Pressure sensor verify communication
C122E: Pressure sensor input out of range low
C122F: Pressure sensor input out of range high
All of the following conditions are met -
Master cylinder pressure sensor power supply effective invalidity Valid
Master cylinder pressure sensor power supply voltage Higher than 6.5 V, and less than 7.5 V
Master cylinder pressure sensor communication Valid
C122E

Monitor runs whenever the following DTCs are not stored C137C: Brake system voltage input out of range low
All of the following conditions are met -
Master cylinder pressure sensor temperature Less than 175°C (347°F)
Master cylinder pressure sensor current Less than 50 mA
+BS voltage 8.5 V or more
C122F

Monitor runs whenever the following DTCs are not stored None
Both of the following conditions are met -
Master cylinder pressure sensor power output On
Pressure power sensor power fail (ECU management) Off