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Home >> Toyota >> 2008 >> Prius Base >> Repair and Diagnosis >> Brakes >> Traction Control >> Brake Control >> Electronically Controlled Brake System >> DTC C1247/47 Stroke Sensor Malfunction; DTC C1392/48 Stroke Sensor Zero Point Calibration Undone >> Description

DTC C1247/47 Stroke Sensor Malfunction; DTC C1392/48 Stroke Sensor Zero Point Calibration Undone: Description

The stroke sensor inputs the pedal stroke into the skid control ECU.

DTC DESCRIPTION

DTC No. INF Code DTC Detection Condition Trouble Area
C1247/47 171 Sensor power source voltage (VCSK) is 3.6 V or less or 4.95 V or more for at least 1.2 sec.
  • Brake pedal stroke sensor
  • Skid control ECU
  • Harness and connector
C1247/47 172 Ratio of sensor output voltage 1 (SKS1) to sensor power source voltage (VCSK) is less than 3% or 97% or more for at least 1.2 sec.
  • Brake pedal stroke sensor
  • Skid control ECU
  • Harness and connector
C1247/47 173 Ratio of sensor output voltage 2 (SKS2) to sensor power source voltage (VCSK) is less than 3% or 97% or more for at least 1.2 sec.
  • Brake pedal stroke sensor
  • Skid control ECU
  • Harness and connector
C1247/47 174 Sensor output 1 (SKS1) calculation value becomes 20 mm or more for at least 1.2 sec. at an interval of 0.006 sec. (changes due to interference).
  • Brake pedal stroke sensor
  • Skid control ECU
  • Harness and connector
C1247/47 175 Sensor output 2 (SKS2) calculation value becomes 20 mm or more for at least 1.2 sec. at an interval of 0.006 sec. (changes due to interference).
  • Brake pedal stroke sensor
  • Skid control ECU
  • Harness and connector
C1247/47 176 Zero point stored value (ratio to power source voltage) of sensor output 1 (SKS1) is 0.46 or more or 0.03 or less.
  • Brake pedal stroke sensor
  • Skid control ECU
  • Harness and connector
C1247/47 177 Zero point stored value (ratio to power source voltage) of sensor output 2 (SKS2) is 0.97 or more or 0.48 or less.
  • Brake pedal stroke sensor
  • Skid control ECU
  • Harness and connector
C1247/47 179 When either condition below is met:
  • Sum of SKS1/VSCK and SKS2/VSCK is 1.155 or more or 0.845 or less for at least 1 sec.
  • Difference between sensor output 1 (SKS1) and sensor output 2 (SKS2) is excessively large for at least 0.2 sec.
  • Brake pedal stroke sensor
  • Skid control ECU
  • Harness and connector
C1247/47 180 When either condition below is met:
  • Difference between zero point output value and stored value is 0.5 or more for at least 0.05 sec.
  • Short between SKS1 and SKS2 output line.
  • Brake pedal stroke sensor
  • Skid control ECU
  • Harness and connector
C1392/48 178 Zero point calibration of stroke sensor is unfinished.
  • Brake pedal stroke sensor zero point calibration undone (initialization of linear solenoid valve and calibration undone)
  • Skid control ECU