Skid Control Buzzer Circuit

DESCRIPTION

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

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

When replacing the skid control ECU, perform initialization of linear solenoid valve and calibration (Click here).

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

1. Connect the intelligent tester to the DLC3.

2. Turn the ignition switch on and turn the intelligent tester main switch on.

3. Select ACTIVE TEST mode on the intelligent tester.

   ABS / VSC / TRAC: 

   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 using the intelligent tester.
   

   Result:

   Condition	Proceed To
   Buzzer sounds/stops	A
   Buzzer does not sound or sounds constantly	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).

A	END

B

2. INSPECT SKID CONTROL BUZZER (POWER SOURCE TERMINAL)

1. Disconnect the skid control buzzer connector.

2. Turn the ignition switch on.

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

   Voltage:

   Tester Connection	Condition	Specified Condition
   V9-2 - Body ground	Ignition switch on	10 to 14 V

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3. INSPECT SKID CONTROL BUZZER

1. Disconnect the skid control buzzer connector.

2. 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 (BETWEEN SKID CONTROL ECU AND SKID CONTROL BUZZER)

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.

   Resistance:

   Tester Connection	Specified Condition
   S40-33 (VBZ) - V9-2 (VBZ)	Below 1 Ω
   S40-12 (BZ) - V9-1 (BZ)	Below 1 Ω

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

   Resistance:

   Tester Connection	Specified Condition
   S40-33 (VBZ) - Body ground	10 kΩ or higher
   S40-12 (BZ) - Body ground	10 kΩ or higher

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5. INSPECT SKID CONTROL ECU (GND TERMINAL)

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

   Resistance:

   Tester Connection	Specified Condition
   S41-1 (GND1) - Body ground	Below 1 Ω
   S40-2 (GND2) - Body ground	Below 1 Ω
   S40-1 (GND3) - Body ground	Below 1 Ω
   S39-2 (GND4) - Body ground	Below 1 Ω
   S39-1 (GND5) - Body ground	Below 1 Ω
   S38-4 (GND6) - Body ground	Below 1 Ω

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
REPLACE SKID CONTROL ECU