Inspection Procedure

1. Connect Techstream to the DLC3.
2. Turn the ignition switch to the ON position and push Techstream main switch ON.
3. Select "Active Test" mode on Techstream.

   ABS/VSC/TRAC 

   ACTIVE TEST - ABS/VSC/TRAC
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   VSC H/B Warning Buzzer	Turns skid control buzzer	ON/OFF	Buzzer can be heard

4. Check that the buzzer sounds/stops when turning the skid control buzzer on/off by using Techstream.

   Result 

   RESULT REFERENCE TABLE
   
   

   Result	Proceed to
   Buzzer sounds/stops	A
   Buzzer does not sound or sounds constantly	B

A: CHECK FOR INTERMITTENT PROBLEMS (See  CHECK FOR INTERMITTENT PROBLEMS   ) 

B: Go To Next Step 

1. Disconnect the skid control buzzer connector.
2. Turn the ignition switch to the ON position.
3. Measure the voltage according to the value(s) in the table below.

   Standard voltage 

   TESTER CONNECTION AND SPECIFIED CONDITION TABLE
   
   

   Tester Connection	Condition	Specified Condition
   V5-2 - Body ground	Always	10 to 14 V

   Fig 1: Identifying Skid Control Buzzer (Power Source Terminal)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 

OK: Go To Next Step 

1. Apply battery negative voltage to terminal 1, and battery positive voltage to terminal 2 of the skid control buzzer, and then check that the buzzer sounds.

   OK: Skid control buzzer sounds. 

   Fig 2: Applying Battery Voltage To Skid Control Buzzer Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE SKID CONTROL BUZZER 

OK: Go To Next Step 

1. Disconnect the skid control ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION AND SPECIFIED CONDITION TABLE
   
   

   Tester Connection	Condition	Specified Condition
   S28-30 (BZ) - V5-1	Always	Below 1 Ω
   S28-30 (BZ) - Body ground	Always	10 kΩ or higher

   Fig 3: Identifying Harness Connector (Skid Control Buzzer - Skid Control ECU)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE MASTER CYLINDER SOLENOID  (See DISASSEMBLY )