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:

Freeze Frame Data
FREEZE FRAME DATA 1. FREEZE FRAME DATA (a) When a DTC is stored, the 4 wheel drive control ECU stores the current vehicle state as Freeze Frame Data. HINT: Freeze Frame Data at the time a DTC is stored: When the 4 wheel drive control ECU stores data at the time a DTC is stored, no updates w ...

VSC OFF Switch Circuit
DESCRIPTION The skid control ECU assembly is connected to the combination meter assembly via CAN communication. Pressing the VSC OFF switch turns off TRAC operation, and pressing and holding this switch turns off TRAC and VSC operation. If TRAC and VSC operations are turned off, the TRAC OFF ...

Short in Front Passenger Side Squib Circuit (B1805/52-B1808/52)
DESCRIPTION The front passenger side squib circuit consists of the airbag sensor assembly and the instrument panel passenger without door airbag assembly. The circuit instructs the SRS to deploy when deployment conditions are met. These DTCs are recorded when a malfunction is detected in the fr ...

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