Inspection Procedure

1. Connect the intelligent tester to the DLC3.
2. Start the engine.
3. Select the Active Test mode on the intelligent tester.

   ABS/VSC: 

   ABS/VSC ACTIVE TEST LIST
   
   

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

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

   Result 

   RESULT CHART
   
   

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

   HINT:

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

B: END 

A: Go to Next Step 

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

   Standard voltage 

   VOLTAGE SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   E93-2 - Body ground	Engine switch on (IG)	10 to 14 V

Fig 1: Identifying Skid Control Buzzer Connector

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 engine 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 SPECIFICATION
   
   

   Tester Connection	Condition	Specified Condition
   A36-30 (BZ) - E93-1	Always	Below 1 Ω
   A36-30 (BZ) - Body ground	Always	10 kΩ or higher

   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: Identifying Skid Control ECU Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE BRAKE ACTUATOR ASSEMBLY