Toyota Venza manuals

Toyota Venza: Motor Circuit Malfunction (C1522-C1555)

Toyota Venza Service Manual / Power Assist Systems / Power Steering System / Motor Circuit Malfunction (C1522-C1555)

DESCRIPTION

The power steering ECU supplies current to the power steering motor through the motor circuit.

DTC No.

DTC Detection Condition

Trouble Area

C1522

Motor current sensor malfunction

  • Steering column assembly
  • Power steering ECU

C1523

Excessively large current deviation

C1524

Short (or open) in motor circuit or abnormal voltage or current in motor circuit

C1555

Motor relay failure

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.

READ VALUE USING TECHSTREAM (MOTOR VOLTAGE)

(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 items "Motor Terminal Volt(U)", "Motor Terminal Volt(V)" and "Motor Terminal Volt(W)" in the Data List and read the value displayed on the Techstream.

EMPS

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Motor Terminal Volt(U)

Motor terminal voltage (U phase)/

Min.: 0 V

Max.: 46.667 V

During steering operation, value changes within 4 to 46 V range

The engine is running and steering wheel is being turned.

Motor Terminal Volt(V)

Motor terminal voltage (V phase)/

Min.: 0 V

Max.: 46.667 V

During steering operation, value changes within 4 to 46 V range

The engine is running and steering wheel is being turned.

Motor Terminal Volt(W)

Motor terminal voltage (W phase)/

Min.: 0 V

Max.: 46.667 V

During steering operation, value changes within 4 to 46 V range

The engine is running and steering wheel is being turned.

Result

Proceed to

During steering operation, value changes within 4 to 46 V range

A

During steering operation, voltage is not generated

B


A

REPLACE POWER STEERING ECU


B

REPLACE STEERING COLUMN ASSEMBLY

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 ...

Torque Sensor Zero Point Adjustment Incomplete (C1516,C1526)
DESCRIPTION These DTCs do not indicate a malfunction. The power steering ECU stores these DTCs when it determines that the rotation angle sensor value initialization and torque sensor zero point ...

Other materials about Toyota Venza:

ACIS Control Circuit
DESCRIPTION This circuit opens and closes the Intake Air Control Valve (IACV) in response to the engine load in order to increase the intake efficiency (ACIS: Acoustic Control Induction System). WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspe ...

Installation
INSTALLATION PROCEDURE 1. ADJUST COMPRESSOR OIL LEVEL (a) When replacing the cooler compressor assembly with a new one, gradually discharge the inert gas (helium) from the service valve, and drain the following amount of oil from the vent ...

Relay
On-vehicle Inspection ON-VEHICLE INSPECTION PROCEDURE 1. REMOVE STOP LIGHT CONTROL (BRK) RELAY (a) Remove the stop light control (BRK) relay. (b) Measure the resistance according to the value(s) in the table below. Standard Resistance: ...

© 2016-2025 Copyright www.tovenza.com

0.1571