LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 2016 >> Fusion Titanium, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 15 (Engine Control System) >> Engine Control Module (ECM) >> Repair procedures >> ECM Problem Inspection Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

ECM Problem Inspection Procedure

WARNING: This page is about a different car, the 2014 Hyundai Elantra GT and 2013 Hyundai Elantra GT. However, it is still accessible from the selected car via links, so may be relevant.
  1. TEST ECM GROUND CIRCUIT: Measure resistance between ECM and chassis ground using the backside of ECM harness connector as ECM side check point. If the problem is found, repair it.

    Specification:  Below 1Ω

  2. TEST ECM CONNECTOR: Disconnect the ECM connector and visually check the ground terminals on ECM side and harness side for bent pins or poor contact pressure. If the problem is found, repair it.
  3. If problem is not found in Step  1 and  2, the ECM could be faulty. If so, make sure there were no DTC's before swapping the ECM with a new one, and then check the vehicle again. If DTC's were found, examine this first before swapping ECM.
  4. RE-TEST THE ORIGINAL ECM: Install the original ECM (may be broken) into a known-good vehicle and check the vehicle. If the problem occurs again, replace the original ECM with a new one. If problem does not occur, this is intermittent problem (Refer to BASIC TROUBLESHOOTING .
scientia non olet · About LEMON Manuals