Repair procedures: Inspection

Connect the KDS/GDS to the vehicle's data link connector (DLC).
Check for DTCs and repair according to the DTC guide.
Check the power supply voltage provided to the fuel pressure sensor (FPS).
Specification : 5V

Fig 1: Check Power Supply Voltage To Fuel Pressure Sensor
Courtesy of KIA MOTORS AMERICA, INC.
Check the voltage provided to the fuel pressure sensor (FPS) at idle.
Specification : 1.9 - 3.2 V

Fig 2: Check Voltage To Fuel Pressure Sensor
Courtesy of KIA MOTORS AMERICA, INC.
Check the fuel pressure in the low fuel line.
(Refer to Fuel Delivery System - "FUEL PRESSURE TEST ")

Items	Specification
start	Max. 600 kPa (Max. 6.1 kgf/cm² , Max. 87.0 psi)
in operation	350 - 500 kPa (3.5 - 5.1 kgf/cm² , 50.7 - 72.5 psi)