DTC C1246/46 Master Cylinder Pressure Sensor Malfunction; DTC C1281/81 Master Cylinder Pressure Sensor Output Malfunction (Test Mode DTC): Description

The master cylinder pressure sensor is built into the brake actuator assembly.

DTC C1281/81 will be deleted when the master cylinder pressure sensor sends a master cylinder pressure signal or when Test Mode ends DTC C1281/81 is output only in Test Mode.

DTC DETECTION CONDITION

DTC Code	DTC Detection Condition	Trouble Area
C1246/46	Any of the following is detected At a vehicle speed of 7 km/h (4 3 mph) or more, when the PMC terminal voltage is over 0.86 V, it does not change by 0 005 V or more for 30 seconds Noise occurs in the PMC terminal 7 times or more within 5 seconds When the stop light switch is OFF, the PMC terminal voltage is more than 0 86 V or less than 0 3 V for 5 seconds or more With the IG1 terminal voltage between 9 5 and 18 5 V, the VCM terminal voltage is not between 4 4 and 5 6 V for 1 2 seconds or more When the VCM terminal voltage between 4 4 and 5 6 V, the PMC terminal voltage is not between 0 19 and 4 57 V for 1 2 seconds or more	Master cylinder pressure sensor Master cylinder pressure sensor circuit Stop light switch circuit Skid control ECU
C1281/81	Detected only during Test Mode	Stop light switch Brake pedal load sensing switch Master cylinder pressure sensor