Skid Control Buzzer Circuit

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: Skid Control Buzzer Circuit
- Skid Control Buzzer Circuit

DESCRIPTION

A buzzer sounds to alert the driver when the vehicle-to-vehicle distance becomes less than the set value (w/ dynamic radar cruise control system).

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
When replacing the brake actuator assembly, perform zero point calibration and store system information Programming and Relearning.

PROCEDURE

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

(a) Connect the Techstream to the DLC3.

(b) Start the engine.

(c) Select the Active Test 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 by using the Techstream.

Result:





HINT
If troubleshooting has been carried out according to 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:





Text in Illustration





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) Connect a negative (-) lead from the battery to terminal 1, and a positive (+) lead to terminal 2 of the skid control buzzer, and then check that the buzzer sounds.

OK:

The skid control buzzer sounds.

Text in Illustration





NG -- REPLACE SKID CONTROL BUZZER Removal
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:





Text in Illustration





HINT
If troubleshooting has been carried out according to 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 BRAKE ACTUATOR ASSEMBLY Removal