Engine Controls - Tests W/Codes: Description

WARNING: This page is about a different car, the 1995 Mercury Villager. However, it is still accessible from the selected car via links, so may be relevant.

Following procedures are functional tests of EEC system. These basic test steps must be followed in sequence to avoid misdiagnosis or replacement of non-faulty components.

VISUAL CHECK & EQUIPMENT HOOKUP
KOEO (KEY ON ENGINE OFF) SELF-TEST

After each service or repair procedure has been completed, repeat QUICK TEST to ensure all EEC system components work properly and trouble codes are no longer present.