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Electronic Automatic Temperature Control Module Self-Test

WARNING: This page is about a different car, the 2002 Lincoln Blackwood. However, it is still accessible from the selected car via links, so may be relevant.
  1. The EATC module self-test will not detect concerns associated with data link messages like engine coolant temperature or vehicle speed signals. A scan tool must be used to retrieve these concerns. EATC module self-test will detect concerns in system control functions and will display hard Diagnostic Trouble Codes (DTCs) in addition to intermittent diagnostic trouble codes for concerns that occur during system operation.
  2. The vehicle interior temperature should be between 40-90°F (4°-32°C) when performing self-test. If temperatures are not within specified ranges, false in-vehicle temperature sensor DTCs will be displayed. Self-test can be initiated at any time. Normal operation of system stops when self-test is activated.
  3. To enter self-test, press OFF and FLOOR buttons simultaneously and then press AUTOMATIC button within 2 seconds. Display will show a pulse tracer going around center of display window. Test may run as long as 30 seconds. Record all DTCs displayed. If any DTCs appear during self-test, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If a condition exists but no DTCs appear during self-test, go to TEST F: EATC SYSTEM INOPERATIVE, INTERMITTENT OR IMPROPER OPERATION  under SYMPTOM TESTS.
  4. To exit self-test and retain all intermittent DTCs, push blue (cooler temperature) button. Control will exit self-test, retain all intermittent DTCs and then turn OFF (display blank). To exit self-test and clear all DTCs, press DEFROST button. Vacuum fluorescent display window will show 888 and all function symbols for one second. Then, EATC control assembly will turn OFF (display blank) and all DTCs will be cleared. Always exit self-test before powering system down (system turned OFF). Intermittent DTCs will be deleted after 80 ignition switch ON cycles after intermittent condition occurs.
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