Skid Control Buzzer Circuit

SKID CONTROL BUZZER CIRCUIT

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

Wiring Diagram:

Step 1 - 2:

Step 3 - 4:

INSPECTION PROCEDURE

HINT: Start the inspection from step 1 when using a hand-held tester and start from step 2 when not using a handheld tester.

CHECK FOR INTERMITTENT PROBLEMS

HINT: A momentary interruption (open circuit) in the connectors and/ or wire harness between the sensors and ECUs can be detected through the ECU data monitor function of the hand-held tester.




a. Turn the ignition switch off and connect the hand-held tester to the DLC3.




b. Turn the ignition switch on. Follow the on-screen directions on the hand-held tester to display the DATA LIST and select areas which should be monitored for momentary interruptions.

HINT: A momentary interruption (open circuit) cannot be detected for 3 seconds after the ignition switch is turned on (initial check).






HINT:
- If the hand-held tester status remains open, check the continuity between the ECU and the sensors, or between ECUs.
- The OPEN display on the hand-held tester remains on for 1 second after the harness signal changes from momentary interruption (open circuit) to normal condition.




c. While observing the screen, gently jiggle the connector or wire harness between the ECU and sensors, or between ECUs.

OK: OPEN-screen display does not change.