No. 1 Clearance Warning Buzzer Circuit [09/2022 - ]: Procedure
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus ES 350, 2024 Lexus ES 300h, 2024 Lexus ES 250, 2023 Lexus ES 350, and 2023 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
- PERFORM ACTIVE TEST USING GTS (FRONT BUZZER)
- 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 OFF or ON 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.
Result
Proceed to OK NG
Result:
OK
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE [09/2022 - ]
Result:
NG
See step 2
- Check that the buzzer operates by performing the Active Test.
- CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - NO. 1 CLEARANCE WARNING BUZZER)
- Disconnect the N41 clearance warning ECU assembly connector.
- Disconnect the G65 No. 1 clearance warning buzzer connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition N41-9 (CBZ) - G65-1 (Z+) Always Below 1 Ω N41-8 (EF) - G65-2 (Z-) Always Below 1 Ω N41-9 (CBZ) or G65-1 (Z+) - Body ground Always 10 kΩ or higher N41-8 (EF) or G65-2 (Z-) - Body ground Always 10 kΩ or higher Result
Proceed to OK NG
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 3
- REPLACE NO. 1 CLEARANCE WARNING BUZZER
Refer to REMOVAL [06/2018 - ]
Result
Proceed to NEXT Result:
NEXT
See step 4
- PERFORM ACTIVE TEST USING GTS (FRONT BUZZER)
- Enter the following menus: Body Electrical / Clearance Warning / Active Test.
- 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 OFF or ON 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.
Result
Proceed to OK NG
Result:
OK
END (NO. 1 CLEARANCE WARNING BUZZER WAS DEFECTIVE)
Result:
NG
REPLACE CLEARANCE WARNING ECU ASSEMBLY. Refer to REMOVAL [09/2022 - ]