DLC Circuit Troubleshooting - PGM-FI System
  1. While disconnecting each of parts or connectors below, one at a time, check for continuity between the ECM connector terminal A9 and body ground.
    • PGM-FI main relay 2 (FUEL PUMP)
    • Each injector 2P connector
    • CKP sensor 3P connector
    • CMP sensor 3P connector
    • Under-hood fuse/relay box (white) connector D (20P)
Does continuity go away when one of the above part is disconnected?
YES -
Replace the part that made the short to body ground go away when disconnected. If the part is the ECM, 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. Also replace the No. 9 IGP (15 A) fuse.■
NO -
Go to Step 41 .
  1. Disconnect these parts or connectors:
    • PGM-FI main relay 2 (FUEL PUMP)
    • Each injector 2P connector
    • CKP sensor 3P connector
    • CMP sensor 3P connector
    • Under-hood fuse/relay box (white) connector D (20P)