C1524

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

DESCRIPTION

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





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* If the power steering ECU assembly has been replaced with a new one, perform assist map writing and rotation angle sensor value initialization torque sensor zero point calibration after performing the initialization of the torque sensor zero point value Programming and Relearning.
* If the steering column assembly has been replaced with a new one, perform rotation angle sensor value initialization torque sensor zero point calibration after performing the initialization of the torque sensor zero point value Programming and Relearning.

PROCEDURE

1. READ VALUE USING TECHSTREAM

(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