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Home >> Lexus >> 2021 >> LS 500h RWD >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System (W/O Advanced Park) - Diagnostic Codes (1 Of 3) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Advanced Park) >> DTC C1247: Stroke Sensor; DTC C1392: Zero Point Calibration of Stroke Sensor undone [10/2020 - 10/2023] >> Typical Enabling Conditions

Typical Enabling Conditions

HINT: 

SAE code only.

C0562, P057C, P057D, P057E, P05DD, P05DE, AND P05DF

Monitor runs whenever the following DTCs are not stored C0597 (Case 1): EEPROM malfunction
C0597 (Case 2): Lost communication
C0597 (Case 3 and 5): CPU malfunction
C0597 (Case 4): IC malfunction
Either of the following conditions is met A or B
A. Both of the following conditions are met -
Brake system voltage 1 Higher than 8.5 V
Brake system voltage 1 monitor value Valid
B. Both of the following conditions are met -
Brake system voltage 2 Higher than 8.5 V
Brake system voltage 2 monitor value Valid
C124B

Monitor runs whenever the following DTCs are not stored C0597 (Case 1): EEPROM malfunction
C0597 (Case 2): Lost communication
C0597 (Case 3 and 5): CPU malfunction
C0597 (Case 4): IC malfunction
P057C: Brake pedal stroke sensor assembly sensor 1 open circuit
P057D: Brake pedal stroke sensor assembly sensor 1 circuit high
P05DD: Brake pedal stroke sensor assembly sensor 2 open circuit
P05DE: Brake pedal stroke sensor assembly sensor 2 circuit high
P05E0: Brake pedal stroke sensor assembly "A"/"B" correlation
All of the following conditions are met A, B and C
A. Either of the following conditions is met 1 or 2
1. Both of the following conditions are met -
Brake system voltage 1 Higher than 8.5 V
Brake system voltage 1 monitor value Valid
2. Both of the following conditions are met -
Brake system voltage 2 Higher than 8.5 V
Brake system voltage 2 monitor value Valid
B. Brake pedal position sensor fail (P057C, P05DD, P057D, P05DE, P05E0) Not detected
C. Master cylinder pressure sensor fail (C122C) Not detected
C1392

Monitor runs whenever the following DTCs are not stored None
Vehicle speed 40 km/h (24.86 mph) or more
P05E0

Monitor runs whenever the following DTCs are not stored C0562: Brake pedal stroke sensor assembly voltage circuit/open
C0597 (Case 1): EEPROM malfunction
C0597 (Case 2): Lost communication
C0597 (Case 3 and 5): CPU malfunction
C0597 (Case 4): IC malfunction
C124B: Brake pedal stroke sensor assembly invalid data
C1392: Brake pedal stroke sensor assembly learning not complete
P057C: Brake pedal stroke sensor assembly sensor 1 open circuit
P057D: Brake pedal stroke sensor assembly sensor 1 circuit high
P057E: Brake pedal stroke sensor assembly sensor 1 intermittent/erratic
P05DD: Brake pedal stroke sensor assembly sensor 2 open circuit
P05DE: Brake pedal stroke sensor assembly sensor 2 circuit high
P05DF: Brake pedal stroke sensor assembly sensor 2 intermittent/erratic
All of the following conditions are met A, B and C
A. Master cylinder pressure sensor fail (C122C) Not detected
B. Brake pedal position sensor fail (C124B, P057C, P05DD, P057D, P05DE) Not detected
C. Either of the following conditions is met 1 or 2
1. Both of the following conditions are met -
Brake system voltage 1 Higher than 8.5 V
Brake system voltage 1 monitor value Valid
2. Both of the following conditions are met -
Brake system voltage 2 Higher than 8.5 V
Brake system voltage 2 monitor value Valid