Up to 08/2009

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 the rotation angle sensor initialization and torque sensor zero point calibration Programming and Relearning.

PROCEDURE

1. CHECK CONNECTOR CONNECTION CONDITION

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

OK:

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

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

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

(a) Turn the engine switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the engine switch on (IG).

(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 Removal

3. CHECK STEERING COLUMN 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 STEERING COLUMN ASSEMBLY Removal

OK -- REPLACE POWER STEERING ECU Removal