1. Check for continuity between PGM-FI main relay 1 4P connector terminal No. 2 and body ground.

Is there continuity?

YES | - | Repair short in the wire between PGM-FI main relay 1, the fuel rail pressure control valve and ECM connector No. 2 terminal No. 1, No. 3 or No. 5. Also replace the No. 8 FI ECU (ECM) (20 A) fuse.■
NO | - | Update the ECM if it does not have the latest software, or substitute a known-good ECM, then recheck. If the symptom/indication goes away with a known-good ECM, replace the original ECM. ■

1. Turn the ignition switch OFF.

1. Disconnect PGM-FI main relay 1.