DLC Circuit Troubleshooting - PGM-FI System
  1. Check for continuity between ECM connector terminal C10 and body ground.
Is there continuity?
YES -
Repair short in the wire between the No. 2 FUEL PUMP (15 A) fuse and the ECM (C10), between the No. 2 FUEL PUMP (15 A) fuse and PGM-FI main relay 2 (FUEL PUMP), or between the No. 2 FUEL PUMP (15 A) fuse and the immobilizer-keyless control unit. Also replace the No. 2 FUEL PUMP (15 A) fuse.■
NO -
Replace the No. 2 FUEL PUMP (15 A) fuse, and 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. Remove the access panel from the floor.
  1. Disconnect the fuel pump 4P connector.