Skid Control Buzzer Circuit

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM (for Vacuum Brake Booster): Skid Control Buzzer Circuit
- Skid Control Buzzer Circuit

DESCRIPTION

The skid control buzzer sounds during VSC operation.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
When replacing the brake actuator assembly, perform zero point calibration Vehicle Stability Control System (for Vacuum Brake Booster).

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (SKID CONTROL BUZZER)

(a) Connect a Techstream to the DLC3.

(b) Start the engine.

(c) Select the Active Test mode on the Techstream Data List / Active Test.

ABS/VSC/TRAC:





(d) Check that the buzzer sounds or stops in accordance with the Techstream.

Result





B -- INSPECT SKID CONTROL BUZZER (POWER SOURCE CIRCUIT)

A -- CHECK FOR INTERMITTENT PROBLEMS How To Proceed With Troubleshooting

2. INSPECT SKID CONTROL BUZZER (POWER SOURCE CIRCUIT)

(a) Disconnect the skid control buzzer connector.





(b) Turn the ignition switch to ON.

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

Standard voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
OK -- Continue to next step.

3. INSPECT SKID CONTROL BUZZER ASSEMBLY

(a) Disconnect the skid control buzzer connector.

(b) Apply battery voltage to terminals 1 and 2 of the skid control buzzer connector, and check that the buzzer sounds.

OK:

The skid control buzzer sound should be heard.

NG -- REPLACE SKID CONTROL BUZZER ASSEMBLY Removal
OK -- Continue to next step.

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

(a) Disconnect the skid control ECU connector.





(b) Disconnect the skid control buzzer connector.

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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE BRAKE ACTUATOR ASSEMBLY Removal