Clearance Warning Buzzer Circuit
The clearance warning buzzer sounds to alert the driver. The sounding pattern changes depending on the distance to an obstacle.
WIRING DIAGRAM
PROCEDURE
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 | .gif) | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
.gif)
CHECK NO. 1 CLEARANCE WARNING BUZZER
(a) Temporarily replace the No. 1 clearance warning buzzer with a new or normally functioning one (See page .gif)
).
(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 |
Test yourself
A quick Toyota 4Runner quiz: every answer comes with an explanation and a link to the manual page.