Control Circuit Inspection

Open Check
1. IG "OFF" & Disconnect fuel pressure regulator (spill valve) connector.
2. IG "ON".
3. Measure voltage between high/low terminal of fuel pressure regulator (spill valve) harness connector and chassis ground.
  Specification: High - approx. 2.3V, Low - approx. 0V
  
  Fig 1: Measuring Voltage Between High/Low Terminal Of Fuel Pressure Regulator (Spill Valve) And Chassis Ground
  Courtesy of HYUNDAI MOTOR AMERICA
4. Is the measured voltage within specification?
  YES
  - Go to "COMPONENT INSPECTION " procedure.
  NO
  - Repair open in fuel pressure regulator (spill valve) control circuit and go to "VERIFICATION OF VEHICLE REPAIR " procedure.