Toyota Venza: Motor Rotation Angle Sensor Malfunction (C1528)

Toyota Venza Service Manual / Power Assist Systems / Power Steering System / Motor Rotation Angle Sensor Malfunction (C1528)

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.

CONNECT CONNECTOR

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

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(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.

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°.

REPLACE POWER STEERING ECU

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:

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)

REPLACE POWER STEERING ECU

REPLACE STEERING COLUMN ASSEMBLY

IG Power Supply Voltage Malfunction (C1551)

DESCRIPTION The power steering ECU distinguishes the ignition switch status as ON or off through the IG power source circuit. DTC No. DTC Detection Condition Troub ...

Vehicle Speed Signal Malfunction (C1541)

DESCRIPTION The power steering ECU receives vehicle speed signals from the brake actuator assembly (skid control ECU) via CAN communication. The ECU provides appropriate assisting force in accord ...

Other materials about Toyota Venza:

Communication Malfunction between ECUs Connected by LIN (B2785)
DESCRIPTION This DTC is stored when LIN communication from the certification ECU stops for a certain amount of time. DTC No. DTC Detection Condition Trouble Area B2785 Errors in LIN co ...

Precaution
PRECAUTION NOTICE: When the ignition switch is turned off and the engine temperature is high, the cooling fans may operate for a maximum of 6 minutes. After turning the ignition switch off, keep hands and objects away from the fans when t ...

Removal
REMOVAL CAUTION / NOTICE / HINT CAUTION: Some of these service operations affect the SRS airbag system. Read the precautionary notices concerning the SRS airbag system before servicing the steering column (See page ). PROCEDURE 1. PRECAUTION HINT: ...