Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Motor Circuit Malfunction (C1428)

DESCRIPTION

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1428

Motor Circuit Malfunction

With the motor relay and motor fail-safe relay OFF, open or short in motor circuit continues for 2 seconds or more.

Brake actuator assembly (Motor circuit)

WIRING DIAGRAM

Refer to DTCs C142B, C146C and C146D (See page CAUTION / NOTICE / HINT ).

CAUTION / NOTICE / HINT

NOTICE:

When replacing the skid control ECU (brake actuator assembly), perform zero point calibration and store system information (See page PROCEDURE PROCEDURE ).

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (GND2 TERMINAL)

(a) Turn the ignition switch off.

(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

(c) Disconnect the S1 skid control ECU (brake actuator assembly) connector.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

S1-1 (GND2) - Body ground

Always

Below 1 Ω

Text in Illustration

*a

Front view of wire harness connector

(to Skid Control ECU [Brake Actuator Assembly])

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (GND2 CIRCUIT)

Motor Power Supply Voltage Circuit (C142B-C146D)
DESCRIPTION The motor relay and motor fail-safe relay are built into the brake actuator assembly. During ABS, TRAC, VSC, or brake assist operation, the skid control ECU (brake actuator assembly) t ...

Steering Angle Sensor Power Source Voltage Malfunction (C1432)
DESCRIPTION The skid control ECU (brake actuator assembly) outputs this DTC when it receives a sensor power source malfunction signal from the steering angle sensor. DTC No. ...

Other materials:

Rear Speed Sensor RH Output Malfunction (C1415,C1416)
DESCRIPTION Refer to DTCs C1403 and C1404 (See page ). DTC No. Detection Item DTC Detection Condition Trouble Area C1415 Rear Speed Sensor RH Output Malfunction Any of the following is detected: An op ...

Steering Angle Sensor Internal Circuit (C1433)
DESCRIPTION The skid control ECU (brake actuator assembly) outputs this DTC when it receives an internal malfunction signal from the steering angle sensor. DTC No. Detection Item DTC Detection Condition Trouble Area C1433 St ...

Removal
REMOVAL PROCEDURE 1. DRAIN AUTOMATIC TRANSMISSION FLUID (a) Remove the drain plug and gasket from the automatic transmission assembly and drain the ATF. (b) Install a new gasket and the drain plug to the automatic transmission assembl ...

© 2011-2020 Copyright www.ttguide.net