Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Hyundai >> 2021 >> Veloster N Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 3) >> DTC P0091-00: Fuel Pressure Regulator 1 Control Circuit Low >> Wiring Inspection >> Control Circuit Inspection

Control Circuit Inspection

Check Item Specifications Prerequisite Condition Terminal (+) Terminal (-)
Control Circuit - Voltage High - Approx. 4.3V
Low - Approx. 0.7V
  1. Disconnect Fuel Pressure Regulator Valve (FPR) connector.
  2. Ignition SW "ON".
High/Low terminal of Fuel Pressure Regulator (FPR) Valve harness Chassis GND
  1. Is voltage within specification?

    YES 

    NO