Inspection Procedure

HINT:

Start the inspection from step 1 in case of using the hand-held tester and start from step  2 in case of not using the hand-held tester.

1. PERFORM ACTIVE TEST BY HAND-HELD TESTER (SKID CONTROL BUZZER) 
   1. Connect the hand-held tester to the DLC3.
   2. Start the engine.
   3. Select the item "VSC/BR WARN BUZ" in the ACTIVE TEST and operate the skid control buzzer on the hand-held tester.
   4. Check that skid control buzzer sounds "ON" and "OFF" with the hand-held tester.
      SKID CONTROL BUZZER REFERENCE
      
      

      Item	Vehicle Condition / Test Details	Diagnostic Note
      VSC / BR WARN BUZ	Turns VSC / BRAKE warning buzzer ON / OFF	Buzzer can be heard

   1. NG: Go to step 2 
   2. OK: REPLACE BRAKE ACTUATOR ASSY (See  BRAKE ACTUATOR ASSY  ) 
   NOTE: When replacing the brake actuator assy, perform the zero point calibration (See  CALIBRATION   ). 
2. INSPECT SKID CONTROL BUZZER ASSY 
   1. Disconnect the skid control buzzer connector.
   2. Apply battery positive voltage to the terminals 1 and 2 of skid control buzzer connector, check that the buzzer sounds.
      Fig 1: Inspecting Skid Control Buzzer Assy

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: REPLACE SKID CONTROL BUZZER ASSY 
   2. OK: Go to next follow T/O 
3. CHECK HARNESS AND CONNECTOR (SKID CONTROL BUZZER - SKID CONTROL ECU) 
   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: 

      SKID CONTROL BUZZER - SKID CONTROL ECU RESISTANCE
      
      

      Tester Connection	Specified Condition
      BZ (S3-30) - BZ (V2-1)	1 Ωor less

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

      Standard: 

      SKID CONTROL BUZZER - SKID CONTROL ECU RESISTANCE
      
      

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

      Fig 2: Identifying Skid Control Buzzer - Skid Control ECU Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
   2. OK: REPLACE BRAKE ACTUATOR ASSY (See  BRAKE ACTUATOR ASSY  ) 
   NOTE: When replacing the brake actuator assy, perform the zero point calibration (See  CALIBRATION   ).