Skid Control Buzzer Circuit

DESCRIPTION

The skid control buzzer sounds while the accumulator pressure is abnormally low or when an abnormality causing low fluid pressure occurs, and then the VSC is activated.

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

When replacing the brake actuator assembly, perform zero point calibration (Click here).

1. PERFORM ACTIVE TEST BY INTELLIGENT TESTER (SKID CONTROL BUZZER)

1. Connect the intelligent tester to the DLC3.

2. Start the engine.

3. Select the Active Test mode on the intelligent tester.

   ABS / VSC: 

   Item (Display)	Vehicle Condition / Test Details	Diagnostic Note
   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 the intelligent tester.
   

   Result:

   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 (Click here).

B	END

A

2. INSPECT SKID CONTROL BUZZER (POWER SOURCE TERMINAL)

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:

   Tester Connection	Condition	Specified Condition
   J18-2 - Body ground	Engine switch on (IG)	10 to 14 V

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

OK

3. INSPECT SKID CONTROL BUZZER

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.
   

NG	REPLACE SKID CONTROL BUZZER

OK

4. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - SKID CONTROL BUZZER)

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:

   Tester Connection	Condition	Specified Condition
   A14-30 (BZ) - J18-1	Always	Below 1 Ω
   A14-30 (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 (Click here).

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
REPLACE BRAKE ACTUATOR ASSEMBLY