No. 1 Clearance Warning Buzzer Circuit [02/2019 - ]: Procedure

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

   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 [02/2019 - 08/2020]  , or refer to  PROBLEM SYMPTOMS TABLE [08/2020 - ] 

Result: 

NG 

See step  2

1. Disconnect the G25*1 or H4*2 clearance warning ECU assembly connector.
   1. *1: for TMMC Made
   2. *2: for TMC Made
2. Disconnect the G71 No. 1 clearance warning buzzer connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   FOR TMMC MADE:
   
   

   Tester Connection	Condition	Specified Condition
   G25-9 (CBZ) - G71-1 (Z+)	Always	Below 1 Ω
   G25-8 (EF) - G71-2 (Z-)	Always	Below 1 Ω
   G25-9 (CBZ) or G71-1 (Z+) - Body ground	Always	10 kΩ or higher
   G25-8 (EF) or G71-2 (Z-) - Body ground	Always	10 kΩ or higher

   FOR TMC MADE:
   
   

   Tester Connection	Condition	Specified Condition
   H4-9 (CBZ) - G71-1 (Z+)	Always	Below 1 Ω
   H4-8 (EF) - G71-2 (Z-)	Always	Below 1 Ω
   H4-9 (CBZ) or G71-1 (Z+) - Body ground	Always	10 kΩ or higher
   H4-8 (EF) or G71-2 (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 [02/2019 - 10/2019] , or refer to REMOVAL [10/2019 - 08/2020] , or refer to REMOVAL [08/2020 - 12/2021] , or refer to REMOVAL [12/2021 - 10/2022] , or refer to REMOVAL [10/2022 - 10/2023] , or refer to REMOVAL [10/2023 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  4

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

   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 [02/2019 - ]