C1523

POWER ASSIST SYSTEMS: POWER STEERING SYSTEM: C1522-C1555; Motor Circuit Malfunction; 2013 MY FR-S [03/2012 -]
C1522 - Motor Circuit Malfunction
C1523 - Motor Circuit Malfunction
C1524 - Motor Circuit Malfunction
C1555 - Motor Relay Welding Failure

DESCRIPTION

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





WIRING DIAGRAM





INSPECTION PROCEDURE

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

PROCEDURE

1. CHECK CONNECTOR CONNECTION CONDITION (POWER STEERING MOTOR - POWER STEERING ECU ASSEMBLY)

(a) Check the connection condition of the z1 power steering motor connector.









OK:

Power steering motor connector is securely connected and locked to the power steering ECU assembly.

NG -- CONNECT CONNECTOR SECURELY
OK -- Continue to next step.

2. READ VALUE USING TECHSTREAM (MOTOR VOLTAGE)

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Start the engine.

(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