No. 2 Clearance Warning Buzzer Circuit [10/2020 - 10/2023]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream 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
   Rear Buzzer	No. 2 clearance warning buzzer	OFF or ON	Confirm that the vehicle is stopped and the engine switch is on (IG)

   Body Electrical > Clearance Warning > Active Test 

   Tester Display
   Rear Buzzer

   OK

   The No. 2 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 [10/2020 - 10/2022]  , or refer to  PROBLEM SYMPTOMS TABLE [10/2022 - 10/2023] 

Result: 

NG 

See step  2

1. Disconnect the L18 clearance warning ECU assembly connector.
2. Disconnect the L21 No. 2 clearance warning buzzer connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   L18-26 (BBZ) - L21-1 (Z+)	Always	Below 1 Ω
   L18-25 (ER) - L21-2 (Z-)	Always	Below 1 Ω
   L18-26 (BBZ) or L21-1 (Z+) - Body ground	Always	10 kΩ or higher
   L18-25 (ER) or L21-2 (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. 2 clearance warning buzzer with a new or known good one.

   Refer to REMOVAL [10/2020 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  4

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream 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
   Rear Buzzer	No. 2 clearance warning buzzer	OFF or ON	Confirm that the vehicle is stopped and the engine switch is on (IG)

   Body Electrical > Clearance Warning > Active Test 

   Tester Display
   Rear Buzzer

   OK

   The No. 2 clearance warning buzzer sounds.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

END (NO. 2 CLEARANCE WARNING BUZZER WAS DEFECTIVE) 

Result: 

NG 

REPLACE CLEARANCE WARNING ECU ASSEMBLY. Refer to  REMOVAL [12/2017 - 10/2022]  , or refer to  REMOVAL [10/2022 - 10/2023]