C1528

POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for Brushless Type Motor): C1528: Motor Rotation Angle Sensor Malfunction
C1528 - Motor Rotation Angle Sensor Malfunction

DESCRIPTION

The motor rotation angle sensor detects the motor rotation angle and sends this information to the power steering ECU assembly.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* If the power steering ECU assembly has been replaced with a new one, perform rotation angle sensor initialization and torque sensor zero point calibration Power Steering System (For Brushless Type Motor).
* If the electric power steering column sub-assembly or power steering motor assembly has been replaced, perform rotation angle sensor initialization and torque sensor zero point calibration Power Steering System (For Brushless Type Motor).

PROCEDURE

1. CHECK CONNECTOR CONNECTION CONDITION

(a) Check the installation condition of the motor rotation angle sensor connector.

OK:

Motor rotation angle sensor connector is securely connected to the power steering ECU assembly.

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

2. READ VALUE USING TECHSTREAM (MOTOR ROTATION ANGLE SENSOR)

(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 item "Motor Rotation Angle" in the Data List and read the value displayed on the Techstream.

EMPS





OK:

During steering operation, motor rotation angle value changes from 0 to 360°.

NG -- CHECK POWER STEERING MOTOR ASSEMBLY

OK -- REPLACE POWER STEERING ECU ASSEMBLY Removal

3. CHECK POWER STEERING MOTOR ASSEMBLY

(a) Disconnect the connector from the motor rotation angle sensor.





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





Text in Illustration





NG -- REPLACE POWER STEERING MOTOR ASSEMBLY Removal

OK -- REPLACE POWER STEERING ECU ASSEMBLY Removal