Kia Rio: Brake Booster Vacuum Pressure Sensor: Inspection - ISG (Idle Stop & Go) System - Engine Control / Fuel System - Kia Rio UB 2012-2026 Service ManualKia Rio: Brake Booster Vacuum Pressure Sensor: 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

     
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.
(Refer to “DTC P0557, P0558” in DTC manual)
Brake Booster Vacuum Pressure Sensor: Circuit Diagram
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