C1522

POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Brushless Type Motor): C1522-C1555: Motor Circuit Malfunction
C1555 - Motor Relay Welding Failure

DESCRIPTION

The power steering ECU assembly supplies the current to the power steering motor assembly through the motor circuit.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* If the power steering ECU assembly has been replaced with a new one, perform rotation angle sensor initialization and torque sensor zero point calibration Power Steering System (For Brushless Type Motor).
* If the electric power steering column sub-assembly or power steering motor assembly has been replaced, perform rotation angle sensor initialization and torque sensor zero point calibration Power Steering System (For Brushless Type Motor).

PROCEDURE

1. READ VALUE USING TECHSTREAM (MOTOR VOLTAGE)

(a) Turn the power switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the power switch on (READY).

(d) Turn the Techstream on.

(e) Enter the following menus: Chassis / EMPS / Data List.

(f) Select the items "Motor Terminal Volt(U)", "Motor Terminal Volt(V)" and "Motor Terminal Volt(W)" in the Data List and read the value displayed on the Techstream.

EMPS





Result:





B -- REPLACE POWER STEERING MOTOR ASSEMBLY Removal

A -- REPLACE POWER STEERING ECU ASSEMBLY Removal