C1528

POWER ASSIST SYSTEMS: POWER STEERING SYSTEM: 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.





WIRING DIAGRAM





INSPECTION PROCEDURE

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

PROCEDURE

1. CHECK CONNECTOR CONNECTION CONDITION

(a) Check the connection condition of the z18 motor rotation angle sensor connector.





OK:

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

Text in Illustration





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

2. READ VALUE USING TECHSTREAM (MOTOR ROTATION ANGLE)

(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 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 STEERING COLUMN ASSEMBLY

OK -- REPLACE POWER STEERING ECU ASSEMBLY Removal

3. CHECK STEERING COLUMN ASSEMBLY

(a) Disconnect the z18 motor rotation angle sensor connector from the power steering ECU.





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

Standard Resistance:





Text in Illustration





NG -- REPLACE STEERING COLUMN ASSEMBLY Removal

OK -- REPLACE POWER STEERING ECU ASSEMBLY Removal