No. 1 Clearance Warning Buzzer Circuit [12/2019 - 11/2023]: Procedure

1. Connect the GTS to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the GTS on.
4. Enter the following menus: Body Electrical / Clearance Warning / Active Test.
5. 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.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [12/2019 - 10/2022]  , or refer to  PROBLEM SYMPTOMS TABLE [10/2022 - 11/2023] 

Result: 

NG 

See step  2

1. Disconnect the H46 clearance warning ECU assembly connector.
2. Disconnect the H47 No. 1 clearance warning buzzer connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H46-9 (CBZ) - H47-1 (Z+)	Always	Below 1 Ω
   H46-8 (EF) - H47-2 (Z-)	Always	Below 1 Ω
   H46-9 (CBZ) or H47-1 (Z+) - Body ground	Always	10 kΩ or higher
   H46-8 (EF) or H47-2 (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

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

   Refer to REMOVAL [12/2019 - 10/2022] , or refer to REMOVAL [10/2022 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  4

1. Connect the GTS to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the GTS on.
4. Enter the following menus: Body Electrical / Clearance Warning / Active Test.
5. 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.

   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 [12/2019 - 11/2023]