Toyota Venza: PS Warning Light Remains ON

Toyota Venza Service Manual / Power Assist Systems / Power Steering System / PS Warning Light Remains ON

DESCRIPTION

If the power steering ECU detects a malfunction, the P/S warning light comes on. At this time, the power steering ECU stores a DTC in its memory.

WIRING DIAGRAM

1. w/ Smart Key System

2. w/o Smart Key System

CAUTION / NOTICE / HINT

NOTICE:

If the power steering ECU has been replaced with a new one, perform the rotation angle sensor initialization and torque sensor zero point calibration (See page ).

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR

(a) Turn the ignition switch to ON.

(b) Check the indication condition of the P/S warning light by wiggling the power steering ECU connector and wire harness up and down, and right and left.

OK:

P/S warning light indication condition does not change.

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.	CHECK FOR DTC (CAN COMMUNICATION SYSTEM)

(a) Check for DTCs (See page ).

OK:

DTC is not output.

GO TO CAN COMMUNICATION SYSTEM

3.	READ VALUE USING TECHSTREAM (IG POWER SUPPLY)

(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 items "IG Power Supply" in the Data List and read the value displayed on the Techstream.

EMPS

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
IG Power Supply	ECU power source voltage/ Min.: 0 V Max.: 20.1531 V	11 to 14 V	Ignition switch ON

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

IG Power Supply

ECU power source voltage/

Min.: 0 V

Max.: 20.1531 V

11 to 14 V

Ignition switch ON

OK:

Normal condition value is displayed the Techstream.

Result

Result	Proceed to
OK	A
NG (for 2GR-FE)	B
NG (for 1AR-FE)	C

INSPECT CHARGING SYSTEM

4.	CHECK HARNESS AND CONNECTOR (POWER STEERING ECU - BODY GROUND)

(a) Disconnect the connectors from the power steering ECU.

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
D20-6 (IG) - Body ground	Ignition switch ON	11 to 14 V

Standard Resistance:

Tester Connection	Condition	Specified Condition
D19-2 (PGND) - Body ground	Always	Below 1 Ω

Text in Illustration

*1	Front view of wire harness connector (to Power Steering ECU)

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.	REPLACE POWER STEERING ECU

(a) Replace the power steering ECU (See page ).

(b) Check the P/S warning light condition.

OK:

P/S warning light remains on when the ignition switch is ON and goes off after engine start.

END

GO TO METER / GAUGE SYSTEM

Torque Sensor Zero Point Adjustment Undone (C1515,C1525)

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 ...

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