DLC Circuit Troubleshooting - PGM-FI System
  1. Check for continuity between ECM connector terminal A4 and body ground.
Is there continuity?
YES -
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 (A4) and DLC terminal No. 14.■
  1. Try to start the engine.
Does the engine start and idle smoothly?
YES -
Go to F-CAN circuit troubleshooting. ■
NO -
Go to Step 34 .
  1. Turn the ignition switch to LOCK (0).
  1. Check the No. 2 IG MAIN (50 A) fuse in the under-hood fuse/relay box.
Is the fuse OK?
YES -
Repair open in the wire between the No. 2 IG MAIN (50 A) fuse and the ignition switch. If the wire is OK, go to Step 36 .
NO -
Repair short in the wire between the No. 2 IG MAIN (50 A) fuse and the under-hood fuse/relay box. Also replace the No. 2 IG MAIN (50 A) fuse.■
  1. Check the No. 9 IGP (15 A) fuse in the under-hood fuse/relay box.
Is the fuse OK?
YES -
Go to Step 43 .
NO -
Go to Step 37 .
  1. Jump the SCS line with the HDS.
  1. Disconnect ECM connector A (49P).