Electronic Control Unit Ground Circuit Check
- With harness connector removed from control unit, attach one ohmmeter lead to a good ground and the other to pin No. 5 of the control unit (not the harness connector cavity No. 5, but to pin on control unit).
- Ohmmeter should show full continuity. If not, make sure electronic control unit is making good contact at its hold-down bolts. If it is, replace control unit.