Repair Procedures: Inspection

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

Fig 1: Checking 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: Checking Voltage To Fuel Pressure Sensor At Idle
Courtesy of KIA MOTORS AMERICA, INC.
Check the fuel pressure in the low fuel line.
(Refer to Fuel Delivery System - "FUEL PRESSURE TEST ")