Initial Test (NAVAJO)

NOTE: While performing EDIS diagnostics, DO NOT connect Electronic Control Assembly (ECA) to breakout box unless directed otherwise. Unless test procedures indicate otherwise, perform the following tests in sequence shown.

Check for any stored trouble codes and repair as necessary. See appropriate G - TEST W/ CODES article in the ENGINE PERFORMANCE section. Using a high-output spark plug tester, check for spark at all spark plugs. If spark is present at ALL spark plugs, go to CHECK PROFILE IGNITION PICKUP (PIP) AT EDIS MODULE (NAVAJO). If no spark is indicated or spark only occurs at some spark plugs, go to CHECKING PLUGS & WIRES (NAVAJO).