DLC Circuit Troubleshooting - PGM-FI System
  1. Check for continuity between ECM connector terminal A19 and body ground.
Is there continuity?
YES -
Go to Step 82 .
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. Continue to check for continuity between ECM connector terminal A19 and body ground, while disconnecting the A/C pressure sensor 3P connector.
Is there continuity?
YES -
Repair short in the wire between the ECM (A19) and the A/C pressure sensor.■
NO -
Replace the A/C pressure sensor. ■