Crown Victoria V8-4.6L VIN W (2000)
Technical Service Bulletin # 00-11-2
Date: 000529
EATC - No Setpoint/Blower Stays on HIGH
Article No.
00-11-2
May 29, 2000
^
AIR CONDITIONING - BLOWER MOTOR STAYS ON
HIGH - EATC VEHICLES ONLY
^
AIR CONDITIONING - TEMPERATURE DOES NOT
MAINTAIN SETPOINT - EATC VEHICLES ONLY
FORD:
2000 CROWN VICTORIA, TAURUS
1999-2000 EXPLORER
LINCOLN:
2000 LS, TOWN CAR
MERCURY:
2000 GRAND MARQUIS, SABLE
1999-2000 MOUNTAINEER
ISSUE
On some vehicles equipped with Electronic Automatic Temperature Control (EATC), there may be concerns where the blower motor may stay on high
after desired temperature is reached, where temperature control does not maintain setpoint, and/or where the temperature gradually wanders away from
the setpoint.
ACTION
Refer to the following Service Procedure to aid in normal diagnostics of the EATC system.
OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: INFORMATION ONLY
OASIS CODES: 208000, 208100, 208200, 208300, 208999
Service Procedure
If no Diagnostic Trouble Codes (DTCs) are obtained during the EATC/DATC module self-test, refer to the following diagnostic Service Procedure.
1.
Inspect the in-car temperature sensor aspirator hose for proper connections at both ends.
2.
Inspect the aspirator hose for kinks or cuts.
3.
On applicable vehicles, verify that the in-car temperature sensor is attached and firmly seated to the dash panel. Some vehicles mount the sensor on
two pins located on the dash panel. The sensor may be mounted onto the pins loosely and not seated firmly against the dash panel, causing a gap in
the sensor-to-dash panel seal and allowing warm air from behind the instrument panel to be drawn across the sensor.
4.
Explorer/Mountaineer Only: Check the mounting fasteners to verify that the gap in the fastener is facing horizontally (i.e., at 3 or 9 o'clock). If the
gap in the fastener is facing vertically (i.e., 6 or 12 o'clock), the sensor will require greater pressure to seat firmly against the instrument panel.
NOTE:
A LOOSELY MOUNTED IN-CAR TEMPERATURE SENSOR, OR ASPIRATOR HOSE WITH CUTS OR KINKS MAY CAUSE SYSTEM TO
BE UNABLE TO MAINTAIN SETPOINT TEMPERATURE OR SETPOINT IS REACHED BUT SYSTEM GRADUALLY COOLS.
EATC/DATC Aspiration Test
This test will determine if the in-car temperature sensor is receiving enough aspiration. A lack of aspiration may result in an incorrect in-car temperature
sensor reading and may cause the EATC/DATC system to act erratically and/or EATC/DATC blowing too cold or too warm.
1.
Cut a piece of toilet tissue or tissue paper about 2.5 x 2.5 cm (1" x 1").
NOTE:
PAPER TOWEL WILL NOT WORK CORRECTLY.
2.
Turn key on, fan speed to HIGH BLOWER, and select PANEL or VENT mode.
