Toyota 4Runner manuals

Toyota 4Runner: Clearance Warning Buzzer Circuit

DESCRIPTION

The clearance warning buzzer sounds to alert the driver. The sounding pattern changes depending on the distance to an obstacle.

WIRING DIAGRAM


PROCEDURE

1.

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

(a) Disconnect the F95 clearance warning ECU assembly connector.

(b) Disconnect the F97 No. 1 clearance warning buzzer connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

F95-19 (CBZ) - F97-1 (Z+)

Always

Below 1 Ω

F95-20 (FF) - F97-2 (Z-)

Always

Below 1 Ω

F95-19 (CBZ) - Body ground

Always

10 kΩ or higher

F95-20 (FF) - Body ground

Always

10 kΩ or higher


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

2.

CHECK NO. 1 CLEARANCE WARNING BUZZER

(a) Temporarily replace the No. 1 clearance warning buzzer with a new or normally functioning one (See page ).


(b) Check that the clearance warning buzzer sounds properly when the intuitive parking assist system detects an obstacle.

OK:

Buzzer sounds properly.


OK

END (NO. 1 CLEARANCE SONAR BUZZER IS DEFECTIVE)


NG

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

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