Typical Enabling Conditions
WARNING: This page is about a different car, the 2025 Lexus NX 350h, 2024 Lexus NX 350h, 2023 Lexus NX 350h, and 2022 Lexus NX 350h. However, it is still accessible from the selected car via links, so may be relevant.
CASE1-1
| Monitor runs whenever the following DTCs are not stored | C0573 (Case 2): Accumulator pressure sensor internal malfunction C0573 (Case 3): Accumulator pressure sensor invalid data C0573 (Case 4): Accumulator pressure sensor lost communication C0574: Brake booster motor pressure sensor stuck C0577 (Case 1): Reaction force pressure sensor lost communication C0577 (Case 2): Reaction force pressure sensor internal malfunction C0577 (Case 3): Reaction force pressure sensor invalid data C0578: Reaction force pressure sensor exceeded learning limit C0594: Brake booster motor performance C05A1 (Case 1): Servo pressure sensor lost communication C05A1 (Case 2): Servo pressure sensor internal malfunction C05A1 (Case 3): Servo pressure sensor invalid data C05A2: Servo pressure sensor exceeded learning limit C05C0: Brake pedal position sensor learning not complete C05C1: Brake pedal position sensor learning not complete C1100 (Case 1): Brake pedal position sensor voltage circuit/open C1100 (Case 2): Brake pedal position sensor invalid data C1103 (Case 1): Brake pedal position sensor voltage circuit/open C1103 (Case 2): Brake pedal position sensor invalid data C110F: Brake system voltage circuit low C121F: Brake system voltage performance C1256: Brake booster motor pressure too low C12FA: Brake system voltage power supply relay open circuit C12FB: Brake system voltage power supply relay circuit high C1345: Brake pressure control solenoid open current learning not complete C13D9: Brake pressure control solenoid pressure too low C140F: Brake booster motor circuit open C141C (Case 1): Brake booster motor relay output shorted high C141C (Case 2): Brake booster motor freewheeling MOS output shorted high C141C (Case 3 to 10): Brake booster motor gate voltage output functional C141D: Brake booster motor open circuit C141E: Brake booster motor circuit high C1451: High pressure hydraulic tube air bleeding not complete C1496: Reaction force pressure sensor voltage circuit low C1497: Reaction force pressure sensor voltage circuit high C1498: Servo pressure sensor voltage circuit low C1499: Servo pressure sensor voltage circuit high C149E: Accumulator pressure sensor voltage circuit low C149F: Accumulator pressure sensor voltage circuit high C14B4: Reaction force pressure sensor intermittent/erratic C14C4: Servo pressure sensor intermittent/erratic C14C7 (Case 3 to 9): Brake system voltage circuit low C14CA: Brake system voltage open circuit C14D3: Accumulator pressure sensor intermittent/erratic C14DE: Brake system voltage circuit low C14EE: Brake pressure control solenoid "C" stuck on C14F3: Brake pressure control solenoid SLA circuit low C14F4: Brake pressure control solenoid SLA circuit high C14FC: Brake pressure control solenoid SLR circuit low C14FD: Brake pressure control solenoid SLR circuit high C1509: Brake pressure control solenoid SSA circuit low C150A: Brake pressure control solenoid SSA circuit high C150C: Brake pressure control solenoid "F" stuck on C150F: Brake pressure control solenoid SGH circuit low C1510: Brake pressure control solenoid SGH circuit high P057A: Brake pedal position sensor invalid data P057C: Brake pedal position sensor open circuit P057D: Brake pedal position sensor circuit high P057E: Brake pedal position sensor intermittent/erratic 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 P05FF: Brake position / reaction force pressure correlation U0129: Lost communication with ECB*_ECU (C-Bus) |
| All of the following conditions are met | - |
| Servo pressure sensor fail | Not detected |
| Brake-by-wire controlled mode | On |
| ABS/TRAC/VSC operation | Off |
| Vehicle | Not running |
| Brake | On |
*: Electronically Controlled Brake System
CASE1-2
| Monitor runs whenever the following DTCs are not stored | C0573 (Case 2): Accumulator pressure sensor internal malfunction C0573 (Case 3): Accumulator pressure sensor invalid data C0573 (Case 4): Accumulator pressure sensor lost communication C0574: Brake booster motor pressure sensor stuck C0577 (Case 1): Reaction force pressure sensor lost communication C0577 (Case 2): Reaction force pressure sensor internal malfunction C0577 (Case 3): Reaction force pressure sensor invalid data C0578: Reaction force pressure sensor exceeded learning limit C0594: Brake booster motor performance C05A1 (Case 1): Servo pressure sensor lost communication C05A1 (Case 2): Servo pressure sensor internal malfunction C05A1 (Case 3): Servo pressure sensor invalid data C05A2: Servo pressure sensor exceeded learning limit C05C0: Brake pedal position sensor learning not complete C05C1: Brake pedal position sensor learning not complete C1100 (Case 1): Brake pedal position sensor voltage circuit/open C1100 (Case 2): Brake pedal position sensor invalid data C1103 (Case 1): Brake pedal position sensor voltage circuit/open C1103 (Case 2): Brake pedal position sensor invalid data C110F: Brake system voltage circuit low C121F: Brake system voltage performance C1256: Brake booster motor pressure too low C12FA: Brake system voltage power supply relay open circuit C12FB: Brake system voltage power supply relay circuit high C1345: Brake pressure control solenoid open current learning not complete C13D9: Brake pressure control solenoid pressure too low C140F: Brake booster motor circuit open C141C (Case 1): Brake booster motor relay output shorted high C141C (Case 2): Brake booster motor freewheeling MOS output shorted high C141C (Case 3 to 10): Brake booster motor gate voltage output functional C141D: Brake booster motor open circuit C141E: Brake booster motor circuit high C1451: High pressure hydraulic tube air bleeding not complete C1496: Reaction force pressure sensor voltage circuit low C1497: Reaction force pressure sensor voltage circuit high C1498: Servo pressure sensor voltage circuit low C1499: Servo pressure sensor voltage circuit high C149E: Accumulator pressure sensor voltage circuit low C149F: Accumulator pressure sensor voltage circuit high C14B4: Reaction force pressure sensor intermittent/erratic C14C4: Servo pressure sensor intermittent/erratic C14C7 (Case 3 to 9): Brake system voltage circuit low C14CA: Brake system voltage open circuit C14D3: Accumulator pressure sensor intermittent/erratic C14DE: Brake system voltage circuit low C14EE: Brake pressure control solenoid "C" stuck on C14F3: Brake pressure control solenoid SLA circuit low C14F4: Brake pressure control solenoid SLA circuit high C14FC: Brake pressure control solenoid SLR circuit low C14FD: Brake pressure control solenoid SLR circuit high C1509: Brake pressure control solenoid SSA circuit low C150A: Brake pressure control solenoid SSA circuit high C150C: Brake pressure control solenoid "F" stuck on C150F: Brake pressure control solenoid SGH circuit low C1510: Brake pressure control solenoid SGH circuit high P057A: Brake pedal position sensor invalid data P057C: Brake pedal position sensor open circuit P057D: Brake pedal position sensor circuit high P057E: Brake pedal position sensor intermittent/erratic 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 P05FF: Brake position / reaction force pressure correlation U0129: Lost communication with ECB*_ECU (C-Bus) |
| All of the following conditions are met | - |
| Servo pressure sensor fail | Not detected |
| Brake-by-wire controlled mode | On |
| ABS/TRAC/VSC operation | Off |
| Vehicle | Running |
| Brake | On |
*: Electronically Controlled Brake System
CASE1-3
| Monitor runs whenever the following DTCs are not stored | C0573 (Case 2): Accumulator pressure sensor internal malfunction C0573 (Case 3): Accumulator pressure sensor invalid data C0573 (Case 4): Accumulator pressure sensor lost communication C0574: Brake booster motor pressure sensor stuck C0577 (Case 1): Reaction force pressure sensor lost communication C0577 (Case 2): Reaction force pressure sensor internal malfunction C0577 (Case 3): Reaction force pressure sensor invalid data C0578: Reaction force pressure sensor exceeded learning limit C0594: Brake booster motor performance C05A1 (Case 1): Servo pressure sensor lost communication C05A1 (Case 2): Servo pressure sensor internal malfunction C05A1 (Case 3): Servo pressure sensor invalid data C05A2: Servo pressure sensor exceeded learning limit C05C0: Brake pedal position sensor learning not complete C05C1: Brake pedal position sensor learning not complete C1100 (Case 1): Brake pedal position sensor voltage circuit/open C1100 (Case 2): Brake pedal position sensor invalid data C1103 (Case 1): Brake pedal position sensor voltage circuit/open C1103 (Case 2): Brake pedal position sensor invalid data C110F: Brake system voltage circuit low C121F: Brake system voltage performance C1256: Brake booster motor pressure too low C12FA: Brake system voltage power supply relay open circuit C12FB: Brake system voltage power supply relay circuit high C1345: Brake pressure control solenoid open current learning not complete C13D9: Brake pressure control solenoid pressure too low C140F: Brake booster motor circuit open C141C (Case 1): Brake booster motor relay output shorted high C141C (Case 2): Brake booster motor freewheeling MOS output shorted high C141C (Case 3 to 10): Brake booster motor gate voltage output functional C141D: Brake booster motor open circuit C141E: Brake booster motor circuit high C1451: High pressure hydraulic tube air bleeding not complete C1496: Reaction force pressure sensor voltage circuit low C1497: Reaction force pressure sensor voltage circuit high C1498: Servo pressure sensor voltage circuit low C1499: Servo pressure sensor voltage circuit high C149E: Accumulator pressure sensor voltage circuit low C149F: Accumulator pressure sensor voltage circuit high C14B4: Reaction force pressure sensor intermittent/erratic C14C4: Servo pressure sensor intermittent/erratic C14C7 (Case 3 to 9): Brake system voltage circuit low C14CA: Brake system voltage open circuit C14D3: Accumulator pressure sensor intermittent/erratic C14DE: Brake system voltage circuit low C14EE: Brake pressure control solenoid "C" stuck on C14F3: Brake pressure control solenoid SLA circuit low C14F4: Brake pressure control solenoid SLA circuit high C14FC: Brake pressure control solenoid SLR circuit low C14FD: Brake pressure control solenoid SLR circuit high C1509: Brake pressure control solenoid SSA circuit low C150A: Brake pressure control solenoid SSA circuit high C150C: Brake pressure control solenoid "F" stuck on C150F: Brake pressure control solenoid SGH circuit low C1510: Brake pressure control solenoid SGH circuit high P057A: Brake pedal position sensor invalid data P057C: Brake pedal position sensor open circuit P057D: Brake pedal position sensor circuit high P057E: Brake pedal position sensor intermittent/erratic 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 P05FF: Brake position / reaction force pressure correlation U0129: Lost communication with ECB*_ECU (C-Bus) |
| All of the following conditions are met | - |
| Servo pressure sensor fail | Not detected |
| Brake-by-wire controlled mode | On |
| ABS/TRAC/VSC operation | Off |
| Up / downstream communication | Valid |
| Brake | Off |
*: Electronically Controlled Brake System
CASE1-4
| Monitor runs whenever the following DTCs are not stored | C0573 (Case 2): Accumulator pressure sensor internal malfunction C0573 (Case 3): Accumulator pressure sensor invalid data C0573 (Case 4): Accumulator pressure sensor lost communication C0574: Brake booster motor pressure sensor stuck C0577 (Case 1): Reaction force pressure sensor lost communication C0577 (Case 2): Reaction force pressure sensor internal malfunction C0577 (Case 3): Reaction force pressure sensor invalid data C0578: Reaction force pressure sensor exceeded learning limit C0594: Brake booster motor performance C05A1 (Case 1): Servo pressure sensor lost communication C05A1 (Case 2): Servo pressure sensor internal malfunction C05A1 (Case 3): Servo pressure sensor invalid data C05A2: Servo pressure sensor exceeded learning limit C05C0: Brake pedal position sensor learning not complete C05C1: Brake pedal position sensor learning not complete C1100 (Case 1): Brake pedal position sensor voltage circuit/open C1100 (Case 2): Brake pedal position sensor invalid data C1103 (Case 1): Brake pedal position sensor voltage circuit/open C1103 (Case 2): Brake pedal position sensor invalid data C110F: Brake system voltage circuit low C121F: Brake system voltage performance C1256: Brake booster motor pressure too low C12FA: Brake system voltage power supply relay open circuit C12FB: Brake system voltage power supply relay circuit high C1345: Brake pressure control solenoid open current learning not complete C13D9: Brake pressure control solenoid pressure too low C140F: Brake booster motor circuit open C141C (Case 1): Brake booster motor relay output shorted high C141C (Case 2): Brake booster motor freewheeling MOS output shorted high C141C (Case 3 to 10): Brake booster motor gate voltage output functional C141D: Brake booster motor open circuit C141E: Brake booster motor circuit high C1451: High pressure hydraulic tube air bleeding not complete C1496: Reaction force pressure sensor voltage circuit low C1497: Reaction force pressure sensor voltage circuit high C1498: Servo pressure sensor voltage circuit low C1499: Servo pressure sensor voltage circuit high C149E: Accumulator pressure sensor voltage circuit low C149F: Accumulator pressure sensor voltage circuit high C14B4: Reaction force pressure sensor intermittent/erratic C14C4: Servo pressure sensor intermittent/erratic C14C7 (Case 3 to 9): Brake system voltage circuit low C14CA: Brake system voltage open circuit C14D3: Accumulator pressure sensor intermittent/erratic C14DE: Brake system voltage circuit low C14EE: Brake pressure control solenoid "C" stuck on C14F3: Brake pressure control solenoid SLA circuit low C14F4: Brake pressure control solenoid SLA circuit high C14FC: Brake pressure control solenoid SLR circuit low C14FD: Brake pressure control solenoid SLR circuit high C1509: Brake pressure control solenoid SSA circuit low C150A: Brake pressure control solenoid SSA circuit high C150C: Brake pressure control solenoid "F" stuck on C150F: Brake pressure control solenoid SGH circuit low C1510: Brake pressure control solenoid SGH circuit high P057A: Brake pedal position sensor invalid data P057C: Brake pedal position sensor open circuit P057D: Brake pedal position sensor circuit high P057E: Brake pedal position sensor intermittent/erratic 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 P05FF: Brake position / reaction force pressure correlation U0129: Lost communication with ECB*_ECU (C-Bus) |
| All of the following conditions are met | - |
| Servo pressure sensor fail | Not detected |
| Brake-by-wire controlled mode | On |
| ABS/TRAC/VSC operation | Off |
| Up / downstream communication | Invalid |
| Brake | Off |
*: Electronically Controlled Brake System