DTC C1427: Motor Malfunction [08/2015 - 08/2019]: Procedure

PERFORM ACTIVE TEST USING TECHSTREAM (MOTOR RELAY)

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

ABS/VSC/TRAC

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

Check for the operating sound of the motor relay when operating it with the Techstream.

RESULT

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

Result:

See step 3

Result:

See step 2

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.

Turn the ignition switch off.
Reconnect the skid control ECU connector.
Clear the DTCs (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).
Start the engine.
Drive the vehicle at a speed of 20 km/h (12 mph) or more for 30 seconds or more.

Check if the same DTC is output (Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] ).

RESULT

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

HINT:

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.
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.
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.

Result:

USE SIMULATION METHOD TO CHECK

Result:

REPLACE BRAKE ACTUATOR ASSEMBLY