Repair Procedures: Inspection

Connect the GDS to the vehicle's data link connector (DLC).
Check any DTCs and if exist, repair according to the DTC guide.
Check the power supply voltage provided to the fuel pressure sensor (FPS).
Specifications: 5V

Fig 1: Supply Voltage Of Fuel Pressure Sensor And Connector End View
Courtesy of HYUNDAI MOTOR AMERICA
Check the voltage provided to the fuel pressure sensor (FPS) at idle.
Specification: 1.9 ~ 3.2 V

Fig 2: Supply Voltage Of Fuel Pressure Sensor At Idle And Connector End View
Courtesy of HYUNDAI MOTOR AMERICA
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)