Intermittent Simulation

To reproduce the conditions creating an intermittent fault, use the following methods:

Lightly vibrate component.
Heat component.
Wiggle or bend wiring harness.
Spray component with water.
Remove/apply vacuum source.

Monitor circuit/component voltage or resistance while simulating intermittent. If engine is running, monitor for self-diagnostic codes. See TESTS W/CODES - EEC-IV (2.0L) article in the ENGINE PERFORMANCE section. Use test results to identify a faulty component or circuit.

NOTE: For test equipment connection and CONTINUOUS MONITOR MODE test operation, see TESTS W/CODES - EEC-IV (2.0L) article in the ENGINE PERFORMANCE section.

Continuous Monitor Mode (Wiggle Test)

In this mode, the technician can attempt to re-create an intermittent fault while monitoring the system. This mode, also called the wiggle test, may be used in Key On Engine Off (KOEO) and Key On Engine Running (KOER) self-test modes. Refer to CIRCUIT TESTS in TESTS W/CODES - EEC-IV (2.0L) article in the ENGINE PERFORMANCE section for instructions on the use of this procedure to identify intermittent faults in specific circuits or components.