Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM100000001RIKJ
Model Year Start: 2021 Model: Camry Prod Date Range: [10/2020 -           ]
Title: PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM: No. 1 Clearance Warning Buzzer Circuit; 2021 - 2024 MY Camry [10/2020 -        ]

No. 1 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 buzzers using a sound pattern that changes depending on the distance to the obstacle.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Perform registration after replacing or removing and installing the ultrasonic sensor or clearance warning ECU assembly.

Click here 2021 - 2024 MY Camry [10/2020 -        ]; PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM: CALIBRATION

PROCEDURE

1.

PERFORM ACTIVE TEST USING GTS

(a) Connect the GTS to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the GTS on.

(d) Enter the following menus: Body Electrical / Clearance Warning / Active Test.

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

Body Electrical > Clearance Warning > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Front Buzzer

No. 1 clearance warning buzzer

Stop or Operate

Confirm that the vehicle is stopped and the ignition switch is ON

Body Electrical > Clearance Warning > Active Test

Tester Display

Front Buzzer

OK:

The No. 1 clearance warning buzzer sounds.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

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

(a) Disconnect the R39 clearance warning ECU assembly connector.

(b) Disconnect the K74 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

R39-9 (CBZ) - K74-1 (Z+)

Always

Below 1 Ω

R39-8 (EF) - K74-2 (Z-)

Always

Below 1 Ω

R39-9 (CBZ) or K74-1 (Z+) - Body ground

Always

10 kΩ or higher

R39-8 (EF) or K74-2 (Z-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

REPLACE NO. 1 CLEARANCE WARNING BUZZER

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

Click here 2021 - 2024 MY Camry [10/2020 -        ]; PARK ASSIST / MONITORING: CLEARANCE WARNING BUZZER: REMOVAL

NEXT

4.

PERFORM ACTIVE TEST USING GTS

(a) Connect the GTS to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the GTS on.

(d) Enter the following menus: Body Electrical / Clearance Warning / Active Test.

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

Body Electrical > Clearance Warning > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Front Buzzer

No. 1 clearance warning buzzer

Operate or Stop

Confirm that the vehicle is stopped and the ignition switch is ON

Body Electrical > Clearance Warning > Active Test

Tester Display

Front Buzzer

OK:

The No. 1 clearance warning buzzer sounds.

OK

END (NO. 1 CLEARANCE WARNING BUZZER WAS DEFECTIVE)

NG

REPLACE CLEARANCE WARNING ECU ASSEMBLY