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Lincoln Forum: Town Car EATC Self test
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  1. #1
    Town's Avatar
    Town is offline Senior Member My Lincoln(s): 2017 Lincoln Continental Reserve 2.7 AWD; 2007 Lincoln Town Car Signature Limited (sold)
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    Town Car EATC Self test

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    The 1992 Town Car has an Automatic Temperature Control HVAC system which does not allow for a self test feature. The 1993 and later models introduced an Electronic Automatic Temperature Control HVAC system. Each post in this thread will cover either a single model or a series of models depending whether the info is the same or not.

    The purpose of an EATC self test is to allow the car owner to start and end the test without any tools or dealer help and the EATC will identify any diagnostic trouble codes found in the EATC module. The codes are cross referenced to descriptions that allow the car owner to check and replace some components in the HVAC system.

    I hope this is helpful.

  2. #2
    Town's Avatar
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    Town Car 1992 model

    The 1992 model has an automatic temperature control system that does not have a self test feature. Attached is a description of the system.
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  3. #3
    Town's Avatar
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    Town Car 1993 model EATC self test

    The 1993 model EATC functional description and self test are attached. The test is initiated by pressing the EATC buttons for OFF and FLOOR at the same time and within 2 seconds pressing the AUTO button. This can take a few tries to get the timing right.
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  4. #4
    Town's Avatar
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    Town Car 1994 model EATC self test

    The 1994 model EATC self test attachment.
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  5. #5
    Town's Avatar
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    Town Car 1995 model EATC self test

    The 1995 model EATC self test attached.
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  6. #6
    Town's Avatar
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    Town Car 1996 model EATC self test

    The 1996 EATC self test
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  7. #7
    Town's Avatar
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    Town Car 1997 model EATC self test

    The 1997 model EATC self test
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  8. #8
    Town's Avatar
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    Town Car 1998 model EATC self test

    The 1998 model EATC self test.
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  9. #9
    Town's Avatar
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    Town Car 1999 thru 2002 models EATC self test

    The 1999 thru 2002 models use the same procedure for the self test.
    Attached Files Attached Files

  10. #10
    Town's Avatar
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    Town Car 2003 and up Self Test

    The 2003 and up models use dual temperature blend doors, one for the driver and rear seat vent for rear passengers, the second for the front passenger. The temperature can be set individually, but there is only one cabin temperature sensor on the drivers side, so the front passenger's temperature is an offset of the driver's setting. There are two electronically controlled actuators for the floor and defrost doors and also an electronic actuator for the recirc door to govern fresh or recirculated cabin air. So the 5 actuators figure in the dual EATC (DEATC) error codes that may be shown in the self test.

    As well as a DEATC self test there is a way of resetting the DEATC and all the actuators in the event of a problem, this is the "cold boot process. Both procedures are attached.
    Attached Files Attached Files
    Last edited by Town; 01-18-2013 at 08:40 PM. Reason: needed a title

  11. #11
    boundlr is offline Junior Member My Lincoln(s): 2007 TC Signature/ 1995 TC Signature
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    Great Post, I had looked for this type info at the dealer but they say they don't have it. Thanks very much. However, I need info on the Test Points that are referenced in the FLM's and details on the Blend door actuactors, their locations and replacement procedures. Is this info available anywhere?

    Thanks again

    lloyd

  12. #12
    boundlr is offline Junior Member My Lincoln(s): 2007 TC Signature/ 1995 TC Signature
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    Forgot to ask about my codes and their formats. My self test displayed the following.

    12 42 22 66 22 67 and then repeated. What do these tell me.

    Thx

    Lloyd

  13. #13
    Town's Avatar
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    2003 and up EATC self test with pdf files

    Attached are the 2007 Town Car EATC self test and cold boot procedures in pdf format. These should work for 2003 and up models of the Town Car.

    Good luck.

  14. #14
    Town's Avatar
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    Quote Originally Posted by boundlr View Post
    Forgot to ask about my codes and their formats. My self test displayed the following.

    12 42 22 66 22 67 and then repeated. What do these tell me.

    Thx

    Lloyd
    Sorry, I just saw your posts. The DTC are 4 digit codes: 1242 is a recirc door failure (up behind the glove box), 2266 is the driver side blend door failure (there is a thread dealing with this replacement in this forum), 2267 is the passenger side blend door actuator failure (Replacement procedure given in the same thread as the driver side actuator).

  15. #15
    Town's Avatar
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    Quote Originally Posted by Town View Post
    The 1999 thru 2002 models use the same procedure for the self test.
    Attached is a pdf version of the 1999 thru 2002 EATC self test procedures.

    Good luck.
    Attached Files Attached Files

  16. #16
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    You Magnificent Bastard!
    I am eternally in your debt. Thank you, SIR!

  17. #17
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    1999 Lincoln TC Sig Ser EATC Code 2416

    Dear Town

    I need your help.

    1999 Lincoln TC Sig Ser EATC Code 2416
    Disc says recirc door short recirc door failure

    Air temperature changes from cold to hot and hot to cold using the EATC Temp control.

    Floor Tab on EATC: Air, either cold or hot, will route to floor only when pressing Floor Tab.

    Defrost Front Tab on EATC: Air, either cold or hot, will route to Defrost only with pressing Defrost Front Tab on EATC.

    Floor/Defrost Tab on EATC: Air, either cold or hot, will route to floor and defrost when Floor/Defrost Tab selected on EATC.

    PROBLEM:

    Panel Vent tab on EATC: Air, either cold or hot, will Not route through panel vent when pressing Panel Vent tab instead air, either cold or hot, routes through the front dash defrost when selecting Panel Vent tab on EATC.

    Panel Vent /Floor tab on EATC: Air, either cold or hot, will route to front dash defrost and floor when selecting Panel Vent /Floor tab on EATC.

    Problem exists no matter if in idle or in drive

    Ran EATC self test: Displays code 24 followed by 16. And repeats. Looked up EATC Code 2416
    Disc says recirc door short recirc door failure. Action to take says go to DTC B2416.

    Are recirc door and recirc door actuator synonymous?

    Are the blend door vs blend door actuator two separate individual distinct parts on this 1999 Linc TC?

    If possible, please direct me to where I can find the steps and the name of the parts needed in order to correct this problem EATC Code 2416 (recirc door short and recirc door failure).

    Many thanks

    Ein

  18. #18
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    Town

    Found the correct thread. Thread: Town Car HVAC recirc door actuator replacement

    1998 LTC recirc door actuator replacement.pdf

    Sorry for the harassment

    Thanks for all the info.

    Ein

  19. #19
    wimpy is offline Senior Member My Lincoln(s): 11, LTC Executive L,09 LTC Signature L, 05 & 03 LTC Exec L, 99 120 Krystal Limo, 01 100 Krystal Limo
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    Quote Originally Posted by Town View Post
    There are two electronically controlled actuators for the floor and defrost doors and also an electronic actuator for the recirc door to govern fresh or recirculated cabin air. So the 5 actuators figure in the dual EATC (DEATC) error codes that may be shown in the self test.
    The EATC Self Test yields the DTCode Which directs us to Pinpoint Test ?? dependent upon the Self-Test Faults. How can we determine what the individual pinpoint test involves and where is the panel/Defrost door
    ? In my case DTC 1263 yields this: Panel/defrost door short/failure

    This tech section is incredibly helpful. Thank you, Town!



  20. #20
    Klincoln is offline Junior Member My Lincoln(s): 2007 Signature TC
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    2007 Lincoln TC Signature. Silver Birch Mettallic.

    Can't get the damm thing to do any self test. Things on EATC that (do) work are as follows: speed,temperature,off-on,recirc,in/out temp,f/c,auto,digital display.... only thing that doesn't work is the changing of where air comes out. Is currently coming out of (only) floor outlets.heat and cold (do) work. Really hoping it's not a (pull the dash) job.....

  21. #21
    Town's Avatar
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    Quote Originally Posted by Klincoln View Post
    2007 Lincoln TC Signature. Silver Birch Mettallic.

    Can't get the damm thing to do any self test. Things on EATC that (do) work are as follows: speed,temperature,off-on,recirc,in/out temp,f/c,auto,digital display.... only thing that doesn't work is the changing of where air comes out. Is currently coming out of (only) floor outlets.heat and cold (do) work. Really hoping it's not a (pull the dash) job.....
    You are likely not pressing "OFF and Floor" simultaneously. I have difficulty doing that too, be patient and try again and again.

    Your symptoms suggest the mode doors that control the air direction through the vents. There are two actuators and the dash must be removed for access. Replace both while you are in there. The two temperature control actuators and the recirc actuator can be replaced without removing the dash.

    Good luck.

  22. #22
    Klincoln is offline Junior Member My Lincoln(s): 2007 Signature TC
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    Well,still can't get it to do the self test. I went to my friends TC with my EATC unit and plugged it into his TC and it worked great,such as changing air directions,temps etc...also performed the self test very easily. Brought up a code on his car 2268 and I told him. Still will not self test on my TC............DAMMIT. I gettin Cornfuzed more by the minute.

  23. #23
    Town's Avatar
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    Quote Originally Posted by Klincoln View Post
    Well,still can't get it to do the self test. I went to my friends TC with my EATC unit and plugged it into his TC and it worked great,such as changing air directions,temps etc...also performed the self test very easily. Brought up a code on his car 2268 and I told him. Still will not self test on my TC............DAMMIT. I gettin Cornfuzed more by the minute.
    So you removed the EATC from both TC's and installed yours in your friend's TC and everything worked just like his EATC except for the 2268 code coming up which is a steering wheel switch issue, assuming similar year models. So your friend does not have faulty mode door actuators.

    There are other conditions that apply before a self test will work, such as temperature where the exterior and interior temperatures must be between 40 and 90 F. I don't know if that is a factor in your case and not your friends case. Anyway the EATC does not appear to be at fault, so the mode door actuators are still the problem. I do not know why the self test is not working on your car since you got the same system to work on your friend's car. I presume you disconnected the battery before removing the EATC so perhaps after installing the EATC and connecting the battery it may clear itself?

    Good luck.

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