Inspection 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: 

   ACTIVE TEST
   
   

   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: Go to 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.

   OK: The skid control buzzer sound should be heard. 

Fig 1: Identifying Skid Control Buzzer Assembly Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   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 CHART
   
   

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

   NOTE: When replacing the brake actuator assembly, perform zero point calibration (See CALIBRATION  )
Fig 2: Identifying Skid Control ECU With Actuator Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE BRAKE ACTUATOR ASSEMBLY