DLC Circuit Troubleshooting - PGM-FI System
  1. Check for continuity between ECM connector terminal A7 and under-hood fuse/relay box connector D (20P) terminal No. 16.
Is there continuity?
YES -
  • Replace the under-hood fuse/relay box.
  • 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. ■
NO -
Repair open in the wire between the ECM (A7) and the under-hood fuse/relay box.■
  1. Turn the ignition switch to LOCK (0).
  1. Disconnect the battery.
  1. Disconnect under-hood fuse/relay box (white) connector D (20P).