Dtc C1427 Motor Malfunction


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (MOTOR RELAY)

CHECK HARNESS AND CONNECTOR (GND2 TERMINAL)

RECONFIRM DTC

DTC C1427 Motor Malfunction


DESCRIPTION


DTC Code
DTC Detection Condition
Trouble Area
C1427
The actuator pump motor does not operate properly.
  1. Brake actuator assembly (Ground circuit)
  2. Brake actuator assembly (Motor circuit)

WIRING DIAGRAM

Refer to DTCs C0273, C0274 and C1361 (LandCruiser RM000001JD60GSX_02.html).

INSPECTION PROCEDURE

NOTICE:
When replacing the brake actuator assembly, perform calibration (LandCruiser RM000000XHR0BKX.html).
1.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (MOTOR RELAY)

  1. Turn the ignition switch off

  1. Connect the intelligent tester to the DLC3.

  1. Start the engine.

  1. Turn the intelligent tester on.

  1. Enter the following menus: Chassis / ABS/VSC/TRC / Active Test.

    ABS/VSC/TRC
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Motor Relay
    		Motor relay
    		Relay ON / OFF
    		The operating sound of the motor can be heard.

  1. Check for the operating sound of the motor relay when operating it with the intelligent tester.

    Result
    Result
    		Proceed to
    Operating sound is not heard
    		A
    Operating sound is heard
    		B



B
Go to step 3
A


2.CHECK HARNESS AND CONNECTOR (GND2 TERMINAL)

  1. Disconnect the A6 skid control ECU (brake actuator assembly) connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    A6-13 (GND2) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (GND2 CIRCUIT)
OK


3.RECONFIRM DTC
HINT:
This code is stored when a problem is identified in the brake actuator assembly.
The motor relay is in the brake actuator assembly.
Therefore, motor relay unit inspections cannot be performed. Be sure to check if the DTC is output before replacing the brake actuator assembly.

  1. Turn the ignition switch off.

  1. Reconnect the skid control ECU connector.

  1. Clear the DTCs (LandCruiser RM000000XHV0KEX.html).

  1. Start the engine.

  1. Drive the vehicle at a speed of 20 km/h (12 mph) or more for 30 seconds or more.

  1. Check if the same DTC is output (LandCruiser RM000000XHV0KEX.html).

    Result
    Result
    		Proceed to
    DTC is not output
    		A
    DTC is output
    		B

    HINT:
    1. If a speed signal of 6 km/h (4 mph) or more is input to the skid control ECU with the ignition switch ON and the stop light switch off, the ECU performs self-diagnosis of the motor and solenoid circuits.
    2. If the normal system code is output (no trouble codes are output), slightly jiggle the connectors, wire harnesses, and fuses of the brake actuator assembly. Make sure that no DTCs are output.
    3. If any DTCs are output while jiggling a connector or wire harness of the brake actuator assembly (skid control ECU), inspect and repair the connector or wire harness. The DTCs were probably output due to a bad connection of the connector terminal.


B
REPLACE BRAKE ACTUATOR ASSEMBLY (LandCruiser RM0000034UX02TX.html)
A

USE SIMULATION METHOD TO CHECK (LandCruiser RM000003YMJ00XX.html)