C1523

POWER ASSIST SYSTEMS: POWER STEERING SYSTEM: C1522-C1555: Motor Circuit Malfunction


DESCRIPTION

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





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
If the steering column assembly or power steering ECU assembly has been replaced, perform rotation angle sensor initialization and torque sensor zero point calibration Programming and Relearning.

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 STEERING COLUMN ASSEMBLY Removal

A -- REPLACE POWER STEERING ECU ASSEMBLY Removal