Test QD: Step 3

3) Check Case Ground Check With Harness Disconnected  Turn key off. Connect ECA to breakout box, but disconnect vehicle harness from breakout box. Set DVOM on 200-ohm scale. Measure resistance between Test Pin No. 20 and ECA metal case. If resistance is less than 5 ohms, go to next step. If reading is more than 5 ohms, replace ECA. Remove breakout box and repeat QUICK TEST.