Continuous Monitor Diagnostic Mode (Wiggle Test) Description

A special diagnostic aid is designed into the EEC-IV system called the continuous monitor diagnostic mode (wiggle test). During either the Key On Engine Off (KOEO) or Key On Engine Running (KOER) tests the technician can enter the wiggle test. The wiggle test is designed to help isolate intermittent faults. The technician can accomplish this by wiggling the harness and LIGHTLY tapping suspected circuits or components when in the wiggle test mode. When a fault is found the Self-Test Output (STO) will be activated and a continuous fault code will be stored.