C1555

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

DESCRIPTION

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





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
If the steering column or power steering ECU is 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 ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON.

(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 ECU Removal

A -- REPLACE STEERING COLUMN Removal