Electronic Control Assembly And Sensor Check

Due to the complexity of the EEC system, 2 special diagnostic aids are required. One is a Digital Volt/Ohmmeter. This is a highly accurate, high input impedance meter that is more accurate than conventional needle-type Volt/Ohmmeters.

The second diagnostic aid is the special EEC System Diagnostic Tester (Rotunda T79L-50-EEC II or T80L-50-EEC II). The tester plugs into the vehicle harness between the electronic control assembly and its harness. Testing instructions are provided in the operator's manual furnished with the tester. Specifications required are on vehicle emission control information decal on engine valve cover.

Other equipment necessary for testing includes a timing light compatible with Dura-Spark systems, a pressure/vacuum gauge, tachometer, spark tester, jumper wire, EFI pressure gauge (T80L-9974-A) and EFI adapter harness (T80L-50-EFI).