Skid Control Buzzer Circuit

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: Skid Control Buzzer Circuit

Skid Control Buzzer Circuit

DESCRIPTION

During VSC operation, the skid control buzzer sounds.
When performing a sensor check in test mode, the buzzer sounds when some of the sensor checks are completed. When a brake pad is overheated, the buzzer sounds as a warning.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTE: When replacing the VSC actuator assembly, perform zero point calibration (Programming and Relearning).

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (SKID CONTROL BUZZER)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON and the Techstream on.
(c) Select the Active Test mode on the Techstream.

ABS/VSC/TRAC:





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

Result





HINT: If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step (Problem Symptoms Table).

B -- REPLACE VSC ACTUATOR ASSEMBLY
A -- Continue to next step.
2. INSPECT SKID CONTROL BUZZER (POWER SOURCE TERMINAL)





(a) Disconnect the J5 buzzer connector.
(b) 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





(a) Remove the skid control buzzer (Removal).
(b) 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 ASSEMBLY
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - SKID CONTROL BUZZER)





(a) Disconnect the A17 ECU connector.
(b) Disconnect the J5 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 -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BODY GROUND)





(a) Disconnect the A17 ECU connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:





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 (Problem Symptoms Table).

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE VSC ACTUATOR ASSEMBLY