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Kia Forte: Brake Booster Vacuum Pressure Sensor Inspection - ISG (Idle Stop & Go) System - Engine Control / Fuel System - Kia Forte TD 2014-2018 Service ManualKia Forte: Brake Booster Vacuum Pressure Sensor Inspection

Second generation YD (2014-2018) / Kia Forte TD 2014-2018 Service Manual / Engine Control / Fuel System / ISG (Idle Stop & Go) System / 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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Brake Booster Vacuum Pressure Sensor Removal
   Brake Booster Vacuum Pressure Sensor can not be replaced separately due to vacuum leak. Therefore, the sensor mu ...

See also:

Replacement
1. Remove the air cleaner assembly. (Refer to Engine Mechanical System - "Air Cleaner") 2. Remove the battery and battery tray ...

Operation Condition for the ISG function
1. Auto stop or Auto start condition (If all of the below condition are satisfied) Items State Remark Driving conditions ISG OFF Switch ...

Transaxle Oil Temperature Sensor Circuit Diagram
...

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