Skid Control Buzzer Circuit

BRAKE CONTROL: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: Skid Control Buzzer Circuit

Skid Control Buzzer Circuit

DESCRIPTION

The skid control buzzer sounds and VSC warning light comes ON during Enhanced VSC operation.

WIRING DIAGRAM





INSPECTION PROCEDURE
NOTE: When replacing the skid control ECU, perform initialization of linear solenoid valve and calibration Initialization.

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (SKID CONTROL BUZZER)
(a) Select the Active Test, generate a control command, and then check that the skid control buzzer operates.

ABS / VSC / TRAC:





OK:
The skid control buzzer can be heard.
OK -- REPLACE SKID CONTROL ECU
NG -- Continue to next step.

2. INSPECT SKID CONTROL BUZZER ASSEMBLY




(a) Disconnect the skid control buzzer connector.
(b) Apply a battery negative voltage to terminal 1 and positive voltage to terminal 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
OK -- Continue to next step.

3. CHECK WIRE HARNESS (SKID CONTROL ECU - SKID CONTROL BUZZER)




(a) Disconnect the S8 ECU connector.
(b) Disconnect the S6 buzzer connectors.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.

4. CHECK WIRE HARNESS (SKID CONTROL ECU - BODY GROUND)




(a) Measure the resistance of the connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- REPLACE SKID CONTROL ECU ASSEMBLY