Hard/Intermittent Code EO20 (Cont.) - Fuel Fuse Blown: Notes

NOTE: The following step numbers refer to the numbers in the accompanying flow chart(s).

At key on light should be off or glow for 2 seconds as relay powers up fuel pump.
If a short is present, it is in circuit No. 120 fuel pump or ECM. Normal circuit resistance is 3-4 ohms.
Checking for ECM shorting circuit No. 120A to ground.
Check for short internal to fuel tank.
Check fuel pump for shorts, check sender harness and check REI suppression connector.
Check for circuit No. 120 shorted to ground.
Check for grounded fuel pump test point, then connection at relay center, and oil pressure switch. Diagnose for harness shorted to ground.
If light is on steadily, the non-switched portion of fuel pump circuit is shorted. Check circuit No. 239.