Component Inspection

IG "OFF" and Disconnect Fuel Sender & Fuel Pump Motor connector and Fuel Sub Sender connector.
Remove these senders from fuel tank and measure the resistance of Fuel sender while lifting up and down the fuel level float.

Fig 1: Measuring Reistance Of Fuel Sender While Lifting Up And Down Fuel Level Float
Courtesy of HYUNDAI MOTOR CO.

Fig 2: Identifying ECM, Instrument Cluster And Fuel Sender & Fuel Pump Motor Connector Terminals
Courtesy of HYUNDAI MOTOR CO.
Does the resistance of FLS change as lifting up and down the fuel level float?
YES
- Substitute with a known - good ECM and check for proper operation. If the problem is corrected, replace ECM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  NOTE: There is a memory reset function on scantool that can erase optional parts automatically detected and memorized by ECM. Before or after testing ECM on the vehicle, use this function to reuse the ECM on the others
NO
- Substitute with a known - good Fuel Level Sender and check for proper operation. If the problem is corrected, replace Fuel Level Sender and go to "VERIFICATION OF VEHICLE REPAIR " procedure.