Brake Booster Vacuum Sensor: Testing and Inspection

Inspection

1. Check installation status of BBVPS and Vacuum hose or damage of vacuum hose.
2. Connect GDS to DLC (Data Link Cable).
3. Warm up the engine to normal operating temperature.
4. Monitor "BBVPS" parameter on GDS.








Fig.1) Idle Status
Fig.2) Brake pressure signal

NOTE:
With a brake partial vacuum that is too low, the ISG function also starts without activity on the part of the driver.
Insufficient brake partial vacuum can lead to safety risks during braking manoeuvres, when rolling on an incline. To prevent this, the engine is started.