Skid Control Buzzer Circuit

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: 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 skid control ECU, perform zero point calibration and store system information Vehicle Stability Control System.

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (SKID CONTROL BUZZER)
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Select the Active Test mode on the Techstream Data List / Active Test.

ABS / VSC / TRAC





(d) Check that the buzzer sounds/stops when turning the skid control buzzer on/off 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 -- END
A -- Continue to next step.
2. INSPECT SKID CONTROL BUZZER (POWER SOURCE TERMINAL)





(a) Turn the engine switch off.
(b) Disconnect the skid control buzzer connector.
(c) Turn the engine switch on (IG).
(d) 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) Turn the engine switch off.





(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
OK -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - SKID CONTROL BUZZER)
(a) Disconnect the skid control 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 SKID CONTROL ECU