Component Inspection

■ Perform High Pressure Fuel Pump Actuation Test 

1. Connect KDS/GDS to Data Link Connector (DLC).
2. Ignition "ON" and Engine "OFF".
3. Perform "Actuation Test"  for High Pressure Fuel Pump.
   Fig 1: Scantool Display - High Pressure Fuel Pump Control Actuation Test

   Courtesy of KIA MOTORS AMERICA, INC.

■ High Pressure Fuel Pump Inspection 

1. Ignition "OFF".
2. Disconnect High Pressure Fuel Pump connector.
3. Measure resistance between power and control terminal of the High Pressure Fuel Pump. (component side)

   Specification:  Approx. 0.6Ω at 30°C (86 °F)

   Fig 2: Scantool Display - Fuel Pressure Regulator Resistance

   Courtesy of KIA MOTORS AMERICA, INC.

■ Fuel Pressure Regulator Inspection 

Inspect Fuel Pressure Regulator performance by measuring voltage and current.

1. Using an oscilloscope measure voltage by connecting channel A (+) voltage probe to High Side and channel A (-) voltage prove to Low Side.
2. Measure operation current by using Low Current Sensor Module.

Fig 3: Scantool Display - Signal Waveform & Data (Engine Idle After Warm Up)

Courtesy of KIA MOTORS AMERICA, INC.

Fig 4: Scantool Display - Signal Waveform & Data (Approx 2000RPM)

Courtesy of KIA MOTORS AMERICA, INC.

■ Confirm Part Inspection 

1. Does the High Pressure Fuel Pump operate properly or is the measured value within specification? (Check variation)

   YES 

   • Go to "Verification of Vehicle Repair " procedure.

   NO 

   • Carefully re-do this troubleshooting guide steps.
   • If problem still occurs, replace FPR and then go to "Verification of Vehicle Repair " procedure.