Master Cylinder Pressure Sensor Output Malfunction (Test Mode DTC) (C1281,...,C1458)

C1281

Stored only during test mode.

• Master cylinder pressure sensor circuit
• Skid control ECU, master cylinder pressure sensor (master cylinder solenoid)

C1421

Either condition is met:

Both of the following conditions continue for at least 1.2 seconds.

• The IG1 terminal voltage is between 9.5 V and 17.0 V.
• The VM/C1 terminal voltage is not within 4.4 V and 5.6 V.

Both of the following conditions continue for at least 1.2 seconds.

• The VM/C1 terminal voltage is between 4.4 V and 5.6 V.
• The PM/C1 terminal voltage is not within 0.19 V and 4.57 V.

• Master cylinder pressure sensor circuit
• Skid control ECU, master cylinder pressure sensor (master cylinder solenoid)

C1423

Both of the following conditions continue for at least 5 seconds

• The stop light switch is off.

• The PM/C1 terminal voltage is below 0.3 V.

• Master cylinder pressure sensor circuit
• Skid control ECU, master cylinder pressure sensor (master cylinder solenoid)

C1424

One of the following conditions is met:

• Noise occurs in the signal from the PM/C1 terminal 7 times or more within 5 seconds
• When the vehicle speed drops from 40 km/h to 10 km/h, the master cylinder pressure does not change by at least 0.048 MPa.
• At a vehicle speed of 7 km/h or more, the PM/C1 terminal voltage is between 0.86 and 1.0 V and master cylinder pressure does not change by at least 0.048 MPa for 60 seconds or more.
• At a vehicle speed of 7 km/h or more, the PM/C1 terminal voltage is 1.0 V or higher and master cylinder pressure does not change by at least 0.048 MPa for 30 seconds or more.
• At a vehicle speed of 7 km/h or more with the stop light switch ON, a state in which the master cylinder pressure sensor input value is sufficiently greater than the estimated master pressure continues for 1 second or more and this state occurs 5 or more times each time the ignition switch is turned to ON, and this occurs 8 or more times consecutively.

• Master cylinder pressure sensor circuit
• Skid control ECU, master cylinder pressure sensor (master cylinder solenoid)

C1455

The IG1 terminal voltage is 9.5 V or higher and the PCTRL terminal voltage is outside the range of 0.19 to 4.57 V for 1.2 seconds.

• Master cylinder pressure sensor circuit
• Skid control ECU, master cylinder pressure sensor (master cylinder solenoid)

C1457

The PCTRL terminal voltage is below 0.3 V for 5 seconds.

• Master cylinder pressure sensor circuit
• Skid control ECU, master cylinder pressure sensor (master cylinder solenoid)

C1458

One of the following conditions is met:

• When the vehicle speed is 10 km/h or more, noise occurs in the signal from the PCTRL terminal 7 times or more within 5 seconds.
• When the vehicle speed drops from 40 km/h to 0 km/h, the control pressure does not change by at least 0.048 MPa, and this occurs 5 times.
• At a vehicle speed of 7 km/h or more, the PCTRL terminal voltage is between 0.86 and 1.0 V and control pressure does not change by at least 0.048 MPa for 60 seconds or more.
• At a vehicle speed of 7 km/h or more, the PCTRL terminal voltage is 1.0 V or higher and control pressure does not change by at least 0.048 MPa for 30 seconds or more.
• At a vehicle speed of 7 km/h or more with the stop light switch ON, a state in which the pressure control sensor input value is sufficiently higher than the estimated control pressure continues for 1 second or more and this state occurs 5 or more times each time the ignition switch is turned to ON, and this occurs 8 or more times consecutively.

• Master cylinder pressure sensor circuit
• Skid control ECU, master cylinder pressure sensor (master cylinder solenoid)

END