C1524

POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for 2AZ-FE): C1522-C1555: Motor Circuit Malfunction
C1555 - Motor Relay Welding Failure

DESCRIPTION

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





WIRING DIAGRAM





INSPECTION PROCEDURE

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

PROCEDURE

1. READ VALUE USING TECHSTREAM (MOTOR VOLTAGE)

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch on (IG).

(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

EMPS:

Result:





B -- REPLACE STEERING COLUMN ASSEMBLY Removal

A -- REPLACE POWER STEERING ECU Removal