Toyota Tacoma (2015-2018) Service Manual: Master Cylinder Pressure Sensor Output Malfunction (Test Mode DTC) (C1281,...,C1458)

Toyota Tacoma (2015-2018) Service Manual / Brake Control / Dynamic Control Systems / Vehicle Stability Control System(for Hydraulic Brake Booster) / Master Cylinder Pressure Sensor Output Malfunction (Test Mode DTC) (C1281,...,C1458)

DESCRIPTION

DTC Code	DTC Detection Condition	Trouble Area
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 (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 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 (4 mph) 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 (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 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)

CAUTION / NOTICE / HINT

NOTICE:

When replacing the skid control ECU (master cylinder solenoid), perform calibration (See page PROCEDURE ).

PROCEDURE

1.	REPLACE MASTER CYLINDER SOLENOID

(a) Replace the master cylinder solenoid (See page ).

END

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DESCRIPTION Refer to DTCs C1421, C1423, C1424, C1455, C1457 and C1458 (See page ). DTC Code DTC Detection Condition Trouble Area C1422 ...

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