Toyota Venza: Clearance Warning Buzzer Circuit

Toyota Venza Service Manual / Park Assist / Monitoring / Intuitive Parking Assist System / Clearance Warning Buzzer Circuit

DESCRIPTION

This circuit consists of the No. 1 clearance warning buzzer and clearance warning ECU assembly. An ECU-excited type buzzer is used. The ECU operates the buzzer using a sound pattern that changes depending on the distance to the obstacle.

WIRING DIAGRAM

PROCEDURE

1.	PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

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

(d) Enter the following menus: Body Electrical / Intuitive P/A / Active Test.

(e) Check that the buzzer operates by performing the Active Test.

Intuitive P/A

Tester Display	Test Part	Control Range	Diagnostic Note
Buzzer	No. 1 clearance warning buzzer	Operate or Stop	Confirm that the vehicle is stopped and the engine switch is on (IG)

OK:

The No. 1 clearance warning buzzer sounds.

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

2.	CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - NO. 1 CLEARANCE WARNING BUZZER)

(a) Disconnect the D80 No. 1 clearance warning buzzer connector.

(b) Disconnect the D79 clearance warning ECU assembly connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
D79-14 (BBZ) - D80-1 (Z+)	Always	Below 1 Ω
D79-13 (ER) - D80-2 (Z-)	Always	Below 1 Ω
D79-14 (BBZ) - Body ground	Always	10 kΩ or higher
D79-13 (ER) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	REPLACE NO. 1 CLEARANCE WARNING BUZZER

(a) Replace the No. 1 clearance warning buzzer with a new or known good one (See page ).

4.	PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

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

(d) Enter the following menus: Body Electrical / Intuitive P/A / Active Test.

(e) Check that the buzzer operates by performing the Active Test.

Intuitive P/A

Tester Display	Test Part	Control Range	Diagnostic Note
Buzzer	No. 1 clearance warning buzzer	Operate or Stop	Confirm that the vehicle is stopped and the engine switch is on (IG)

OK:

The No. 1 clearance warning buzzer sounds.

END

REPLACE CLEARANCE WARNING ECU ASSEMBLY

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