Component Inspection

Check FLS resistance
1. IG "OFF" and Disconnect Fuel Sender & Fuel Pump Motor connector.
2. Remove these senders from fuel tank and measure the resistance of Fuel sender while lifting up and down the fuel level float.
  
  Fig 1: Checking FLS Resistance
  Courtesy of KIA MOTORS AMERICA, INC.
3. Does the resistance of FLS change as lifting up and down the fuel level float?
  YES
  - Substitute with a known-good PCM and check for proper operation. If the problem is corrected, replace PCM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
    NOTE: There is a memory reset function on GDS that can erase optional parts automatically detected and memorized by PCM. Before or after testing PCM on the vehicle, use this function to reuse the PCM 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.