Skid Control Buzzer Circuit

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

DESCRIPTION

The skid control buzzer sounds when the VSC or Hill-start Assist Control (HAC) operates.

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT
Start the inspection from step 1 when using a intelligent tester and start from step2 when not using a intelligent tester.

PROCEDURE

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

(a) Connect Techstream to the DLC3.

(b) Start the engine.

(c) Select the item "VSC H/B Warning Buzzer" in the Active Test and operate the skid control buzzer on Techstream.

ABS/VSC/TRAC

(d) Check that the buzzer sounds/stops when the skid control buzzer is turned on/off by using Techstream.

A -- CHECK FOR INTERMITTENT PROBLEMS
B -- Continue to next step.

2. INSPECT SKID CONTROL BUZZER (POWER SOURCE CIRCUIT)

(a) Disconnect the skid control buzzer connector.

(b) Turn the ignition switch to the ON position.

(c) Measure the voltage.

Standard:

(d) Turn the ignition switch to OFF.

(e) Reconnect the skid control buzzer connector.

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.

(c) Reconnect the skid control buzzer connector.

NG -- REPLACE SKID CONTROL BUZZER ASSEMBLY
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.

Standard:

(d) Reconnect the skid control buzzer connector.

(e) Reconnect the skid control ECU connector.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE MASTER CYLINDER SOLENOID