The EATC module self-test will not detect concerns associated with data link messages like engine coolant temperature or vehicle speed signals. A diagnostic tool must be used to retrieve these concerns.
The EATC module self-test will detect concerns in the 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. The vehicle interior temperature should be between 4°-32°C (40-90°F) when carrying out the self-test. If the temperatures are not within the specified ranges, false in-car temperature sensor DTCs will be displayed.
The self-test can be initiated at any time. Normal operation of the system stops when the self-test is activated.
To enter the self-test, press the OFF and FLOOR buttons simultaneously and then press the AUTOMATIC button within two seconds. The display will show a pulse tracer going around the center of the display window. The test may run as long as 30 seconds. Record all DTCs displayed.
If any DTCs appear during the self-test, follow the diagnostics procedure given under ACTION for each DTC given.
If a condition exists but no DTCs appear during the self-test, GO to «SYMPTOM CHART»(/ford/crown-victoria/ii-1997-2011/remont/general-servicing-all-makes/#hvac-control-system-general-information) Condition: The EATC System Is Inoperative, Intermittent or Improper Operation.
To exit self-test and retain all intermittent DTCs, push the blue (cooler) button. The control will exit selftest, retain all intermittent diagnostic trouble codes and then turn OFF (display blank).
To exit the self-test and clear all DTCs, press the DEFROST button. The vacuum fluorescent display window will show 888 and all function symbols for one second. Then, the EATC control assembly will turn OFF (display blank) and all DTCs will be cleared.
Always exit the self-test before powering the system down (system turned OFF).
Intermittent DTCs will be deleted after 80 ignition switch ON cycles after the intermittent condition occurs.

DTC	Description	Action
P1460	WOT A/C cutout internal driver malfunction	REFER to INTRODUCTION - CNG, FLEX-FUEL & GASOLINE
P1469	Low A/C cycling period	REFER to INTRODUCTION - CNG, FLEX-FUEL & GASOLINE .
P1474	Low speed fan internal driver failure	REFER to INTRODUCTION - CNG, FLEX-FUEL & GASOLINE .
P1479	High speed fan internal driver failure	REFER to INTRODUCTION - CNG, FLEX-FUEL & GASOLINE .
P1464	A/C demand out of self-test range	REFER to INTRODUCTION - CNG, FLEX-FUEL & GASOLINE .

POWERTRAIN CONTROL MODULE (PCM) DIAGNOSTIC TROUBLE CODE (DTC) INDEX

DTC	EATC (Hard) Self-Test Faults	EATC (Intermittent) Run-Time Faults	Description	Action to Take
B1249	024	025	Blend door short or failure	Go to PINPOINT TEST A
B1251	031	N/A	In-car temperature sensor open circuit	Go to PINPOINT TEST B .
B1253	030	N/A	In-car temperature sensor short to ground	Go to PINPOINT TEST B
B1255	041	043	Ambient temperature sensor open circuit	Go to PINPOINT TEST C .
B1257	040	042	Ambient temperature sensor short to ground	Go to PINPOINT TEST C .
B1260	053	051	A/C solar radiation sensor open circuit	Go to PINPOINT TEST D .
B1261	050	052	Solar radiation sensor circuit short to ground	Go to PINPOINT TEST D .
U1073	N/A	N/A	SCP invalid or missing data for engine coolant	REFER to INTRODUCTION - CNG, FLEX-FUEL & GASOLINE .
U1341	N/A	N/A	SCP invalid or missing data for function read vehicle speed	REFER to INTRODUCTION - CNG, FLEX-FUEL & GASOLINE .