Component Inspection

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

Fig 1: Measuring Resistance Of Fuel Level Sender
Courtesy of HYUNDAI MOTOR CO.
Does the resistance of FLS change as lifting up and down the fuel level float?
YES
1. 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 scantool 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
1. 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.