Skid Control Buzzer Circuit: Procedure

1. Connect Techstream to the DLC3.
2. Start the engine.
3. Select the item "Buzzer" in the Active Test and operate the skid control buzzer on Techstream.
   ABS / VSC / TRAC:
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Buzzer	Skid control buzzer	Buzzer ON / OFF	Buzzer can be heard

4. Check that skid control buzzer sounds by operating with Techstream.

   OK

   The skid control buzzer sounds in accordance with operation of Techstream.

NG → See step   2 

OK → REPLACE BRAKE ACTUATOR ASSEMBLY 

1. Disconnect the skid control buzzer connector.
2. Apply battery negative voltage to terminal 1, and battery positive voltage to terminal 2 of the skid control buzzer connector, and check that the buzzer sounds.
   Fig 1: Identifying Skid Control Buzzer Assembly Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK

   The skid control buzzer sound should be heard.

NG → REPLACE SKID CONTROL BUZZER 

OK: Go to next step 

1. Disconnect the skid control buzzer connector and the skid control ECU connector.
2. Measure the resistance according to the value(s) in the table below.
   Fig 2: Identifying Skid Control ECU And Buzzer Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance

   Tester Connection	Specified Condition
   S3-30 (BZ) - V6-1 (BZ)	Below 1 Ω

3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Specified Condition
   S3-30 (BZ) - Body ground	10 kΩ or higher

   NOTE:

   When replacing the brake actuator assembly, perform zero point calibration. Refer to CALIBRATION

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → REPLACE BRAKE ACTUATOR ASSEMBLY