Mountaineer 4WD V6-4.0L VIN E (1999)
Control Module HVAC: Customer Interest
A/C - Cold Air Blows From Floor Ducts
Article No.
02-8-5
04/29/02
CLIMATE CONTROL - ELECTRONIC AUTOMATIC
TEMPERATURE CONTROL (EATC) BLOWS COLD AIR
FROM FLOOR DUCTS - VEHICLES PRODUCED
BEFORE 9/30/2000 ONLY
FORD:
1998-2001 EXPLORER
MERCURY:
1998-2001 MOUNTAINEER
ISSUE
Some vehicles produced before 9/30/2000 equipped with Electronic Automatic Temperature Control (EATC) may blow cold air from the floor ducts
after the climate control system reaches a steady state in AUTO mode after switching from the FLOOR/DEFROST mode position to the FLOOR mode
position, usually after driving for 15-30 minutes. This may be caused by the software version of the EATC Module.
ACTION
Update the software version or replace the EATC Module. Refer to the following Service Procedure for details.
SERVICE PROCEDURE
On vehicles equipped with the following EATC modules, F87H-18C612-BD, F87H-18C612-BE, XL2H-18C612-AA, or XL2H-18C612-AB, use NGS
with Service Card Version 9.0 or later to update the EATC module software. On all other modules, replace the EATC module with service part
YL2Z-19980-AA. Refer to section 412-04 of the appropriate model year Workshop Manual for removal and installation procedures. Use NGS with
diagnostic card installed to verify the EATC module ID number (Engineering Part Number).
NGS Procedure for Identifying EATC Module ID Number
1.
Select "Diagnostics".
2.
Select "EATC".
3.
Select "Module I.D".
NGS will display the EATC module I.D. number (Engineering Part Number). Vehicles that have been previously updated with this software will display
"GO7H-BA".
NGS Procedure for Updating Software
1.
Select "Service Bay Functions".
2.
Select "EATC" from module list.
3.
Select "Module Configuration".
4.
Select "99-01 Explorer" or "99-01 Mountaineer".
Upon completion of the software upgrade, NGS will change the EATC module I.D to G07H-BA and display "Module Data Download Successfull". If
the EATC module has been updated previously, or the module is not one of the modules listed as being capable of being updated, NGS will display "Can
not update with the NGS". If the module is not capable of being updated, replace the module with part number YL2Z-19980-AA as listed above.
Parts Block
