Toyota Venza Quiz
Power Assist Systems

Motor Rotation Angle Sensor Malfunction (C1528)

In this manual: Power Assist Systems
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~2min read
DESCRIPTION

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

DTC No.

DTC Detection Condition

Trouble Area

C1528

Motor rotation angle sensor malfunction
  • Motor rotation angle sensor (built into steering column assembly)
  • Power steering ECU
WIRING DIAGRAM
CAUTION / NOTICE / HINT

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 (See page ).


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.


NG

CONNECT CONNECTOR
OK

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

(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

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Motor Rotation Angle

Motor rotation angle/

Min.: 0 deg

Max.: 360 deg

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

The engine is running and steering wheel is being turned.

OK:

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


OK

REPLACE POWER STEERING ECU
NG

  1. 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:

Tester Connection

Condition

Specified Condition

z9-6 (RZSN) - z9-3 (RZG)

Always

75.2 to 112.8 Ω

z9-1 (RZV) - z9-3 (RZG)

Always

27.6 to 41.4 Ω

z9-5 (RZCS) - z9-3 (RZG)

Always

73.2 to 110.8 Ω
Text in Illustration

*1

Front view of wire harness connector

(to Motor Rotation Angle Sensor)

OK

REPLACE POWER STEERING ECU

NG

REPLACE STEERING COLUMN ASSEMBLY

Test yourself

A quick Toyota Venza quiz: every answer comes with an explanation and a link to the manual page.