Inspection Procedure

1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch to the ON position.
3. Select the Active Test mode on the intelligent tester (See DATA LIST / ACTIVE TEST  ).

   ABS/VSC: 

   NORMAL CONDITION CHART
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   VSC / BR WARN BUZ	Skid control buzzer	Buzzer ON / OFF	Buzzer sound can be heard

4. Check that the buzzer sounds or stops when turning the skid control buzzer on or off by using the intelligent tester.

   Result 

   DTC RESULT REFERENCE
   
   

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

B: CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) (See  DIAGNOSIS SYSTEM   ) 

A: Go to next step 

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

   Standard voltage 

   VOLTAGE SPECIFICATION
   
   

   Tester Connection	Switch Condition	Specified Condition
   V8-+2 - Body ground	Ignition switch ON	10 to 14 V

Fig 1: Identifying Skid Control Buzzer Connector Terminal (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: 

   The skid control buzzer sounds. 

   Fig 2: Inspecting Skid Control Buzzer

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE SKID CONTROL BUZZER 

OK: Go to next step 

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

   Standard resistance 

   RESISTANCE REFERENCE
   
   

   Tester Connection	Condition	Specified Condition
   S1-30 (BZ) - V8-1	Always	Below 1 Ω
   S1-30 (BZ) - Body ground	Always	10 kΩ or higher

4. Connect the connectors.

   HINT:

   If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part (See PROBLEM SYMPTOMS TABLE  ).

   Fig 3: Brake Actuator Assembly And ECM - Wiring Diagram

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (SKID CONTROL ECU - SKID CONTROL BUZZER) 

OK: REPLACE BRAKE ACTUATOR ASSEMBLY (See  REMOVAL   )