VEHICLE STABILITY CONTROL SYSTEM (for Hydraulic Brake Booster), Diagnostic DTC:C1421, C1281, C1423, C1424, C1455, C1457, C1458

DTC Code DTC Name
C1421 Open or Short in Master Cylinder Pressure Sensor
C1281 Master Cylinder Pressure Sensor Output Malfunction (Test Mode DTC)
C1423 Master Cylinder Pressure Sensor Zero Point Low Malfunction
C1424 Master Cylinder Pressure Sensor Output Malfunction
C1455 Open or Short in Control Pressure Sensor
C1457 Control Pressure Sensor Zero Point Low
C1458 Control Pressure Sensor Zero Point Output

DESCRIPTION

The pressure control sensor and master cylinder pressure sensor are connected to the skid control ECU in the master cylinder solenoid.

A00O5PSE03
DTC Code DTC Detection Condition Trouble Area
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 solenoid (Master cylinder pressure sensor, skid control ECU)
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 solenoid (Master cylinder pressure sensor, skid control ECU)
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 (25 mph) to 10 km/h (6 mph), the master cylinder pressure does not change by at least 0.048 MPa.

  • At a vehicle speed of 7 km/h (4 mph) 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 (4 mph) or more, the PM/C1 terminal voltage is 1.0 V or more 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 (4 mph) or more with the stop light switch ON, a state in which the 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 solenoid (Master cylinder pressure sensor, skid control ECU)
C1281 Detected only during Test Mode Master cylinder solenoid (Master cylinder pressure sensor, skid control ECU)
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 solenoid (Pressure control sensor, skid control ECU)
C1457 The PCTRL terminal voltage is below 0.3 V for 5 seconds. Master cylinder solenoid (Pressure control sensor, skid control ECU)
C1458

One of the following conditions is met:


  • When the vehicle speed is 10 km/h (6 mph) 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 (25 mph) to 0 km/h (0 mph), 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 (4 mph) 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 (4 mph) 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 (4 mph) or more with the stop light switch ON, a state in which the pressure control sensor input value is sufficiently greater 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 solenoid (Pressure control sensor, skid control ECU)

INSPECTION PROCEDURE

Note

When replacing the master cylinder solenoid, perform calibration Click here.

PROCEDURE


  1. REPLACE MASTER CYLINDER SOLENOID


    1. Replace the master cylinder solenoid (for LHD: Click here, for RHD: Click here.


    NEXT

    END