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Home >> Toyota >> 2019 >> Mirai >> Repair and Diagnosis (Single Page) >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System - Diagnostic Codes (1 Of 2) >> Electronically Controlled Brake System >> DTC C1247-47: Stroke Sensor Malfunction; DTC C1346-71: Stroke Sensor Zero Point Learning Malfunction (Test Mode DTC); DTC C1392-48: Stroke Sensor Zero Point Calibration Undone [06/2015 - ] >> Description

DTC C1247-47: Stroke Sensor Malfunction; DTC C1346-71: Stroke Sensor Zero Point Learning Malfunction (Test Mode DTC); DTC C1392-48: Stroke Sensor Zero Point Calibration Undone [06/2015 - ]: Description

The brake pedal stroke sensor assembly sends a signal about the pedal stroke to the skid control ECU (brake booster with master cylinder assembly).

DTC C1346/71 will be cleared when the brake pedal stroke sensor assembly sends a brake pedal stroke sensor assembly signal or when Test Mode ends. DTC C1346/71 is output only in Test Mode.

DTC No. Detection Item INF Code DTC Detection Condition Trouble Area Note
C1247/47 Stroke Sensor Malfunction 211
212
213
214
215
216
217
218
219
220
221
222
223
  • INF Code: 211
    • Sensor supply voltage (VCM1) is 4.75 V or less, or 5.25 V or more for 0.2 seconds or more.
  • INF Code: 212
    • Sensor output voltage 1 (SKS1) is less than 5.5%, or 94% or more (less than 0.27 V, or 4.7 V or more) of sensor supply voltage (VCM1) for 0.2 seconds or more.
  • INF Code: 213
    • Sensor output voltage 2 (SKS2) is less than 5.5%, or 94% or more (less than 0.27 V, or 4.7 V or more) of sensor supply voltage (VCSK) for 0.2 seconds or more.
  • INF Code: 214
    • Either of the following is detected:
      1. Fluctuation of sensor output 1 (SKS1) is out of specification.
      2. The difference between the present value and last value of sensor output voltage 1 (SKS1) is 8.5% or more (0.43 V or more) of sensor supply voltage (VCM1) for 0.2 seconds or more.
  • INF Code: 215
    • Either of the following is detected:
      1. Fluctuation of sensor output 2 (SKS2) is out of specification.
      2. The difference between the present value and last value of the sensor output voltage 2 (SKS2) is 8.5% or more (0.43 V or more) of the sensor supply voltage (VCM1) for 0.2 seconds or more.
  • INF Code: 216
    • Either of the following is detected:
      1. Pedal off position (zero point stored value) is out of specification.
      2. The zero point stored value for the sensor output voltage 1 (SKS1) is deviates -17% to 25.9% (0.15 to 2.3 V) or more from the theoretical value.
  • INF Code: 217
    • Either of the following is detected:
      1. Pedal off position (zero point stored value) is out of specification.
      2. The zero point stored value for the sensor output voltage 2 (SKS2) deviates -31.7% to 17% (2.42 to 4.85 V) or more from the theoretical value.
  • INF Code: 218
    • An excessive difference between the change in sensor output 1 (SKS1) and sensor output 2 (SKS2) is detected for 0.2 seconds or more.
  • INF Code: 219
    • Sensor data is invalid for 0.2 seconds or more.

      (Skid control ECU (Brake booster with master cylinder assembly) internal monitor circuit malfunction.)

  • INF Code: 220
    • The sum of sensor output voltage 1 (SKS1) and sensor output voltage 2 (SKS2) deviates 15% or more from the theoretical value 5 V.
  • INF Code: 221
    • An excessive difference exists between the variation in sensor output voltage 1 (SKS1) and sensor output voltage 2 (SKS2).
  • INF Code: 222
    • Sensor power source voltage (VCM1) remains at 4.75 V or less or 5.25 V or more and the sensor data is invalid for 0.2 seconds or longer.
  • INF Code: 223
    • Sensor data is invalid for 0.2 seconds or more.

      (Open, short or noise.)

  • INF Code: 211
    • Open or short in brake pedal stroke sensor assembly power supply circuit
    • Improperly connected connector, deformation or corrosion of terminals
    • Skid control ECU (Brake booster with master cylinder assembly)
  • INF Code: 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223
    • Open or short in wire harness
    • Improperly connected connector, deformation or corrosion of terminals
    • Brake pedal stroke sensor assembly
Electronically controlled brake system DTC
C1346/71 Stroke Sensor Zero Point Learning Malfunction (Test Mode DTC) - Detected only during Test Mode.
  • Brake pedal stroke sensor assembly
  • Brake pedal stroke sensor assembly circuit
Electronically controlled brake system Test Mode DTC
C1392/48 Stroke Sensor Zero Point Calibration Undone - Zero point calibration of brake pedal stroke sensor assembly is unfinished.
  • Brake pedal stroke sensor zero point calibration incomplete (Initialization and calibration of linear solenoid valve incomplete)
  • Skid control ECU (Brake booster with master cylinder assembly)
Electronically controlled brake system DTC