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hey guys..,
I picked this up from another message board, on lincolnforums.com, from a user named "CadillacETC1997".

I tried it on my 97 eldorado and it works very nicely.
kevin
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with this mod you can see your cars MPH and Coolant temp displayed on the DIC

1) Press the OFF and PASS WARMER (referred to from here as WARMER) buttons simultaneously to enter diagnostic mode.

2) Let the system read any codes it has stored. You will ultimately be presented with "PCM?". You will answer with the fan speed control button. UP = yes and DOWN = no.

3) Press DOWN until you are presented with "IPC?". On mine, it's the very next prompt. When you get to the "IPC?" prompt, press UP to enter the IPC area (Instrument Panel Cluster).

4) Press DOWN until you are presented with "IPC OVERRIDE?". Press UP to enter the override area.

5) Scroll down (with the DOWN button) until you get to Option E. Wait a second or two, and the override value will appear to the right where the TRIP ODOMETER normally reads. Yours will probably read "43". That's what mine read when I first did this.

Below are the Option E values:

- Coolant Temp message (64)
- Battery Volts message (32)
- Engine RPM message (16)
- Avg Mph message (8)
- Mph message (4)
- Fuel Used message (2)
- Inst Mpg message (1)

The stock displays (for analog E/K displays) are Battery Volts, Avg Mph, Fuel Used, and Inst Mpg, for a total value of "43".

6) Use the WARMER button to increment the value of the override. In this case, we want to add Coolant Temp, so we're going to add "64" to "43", or "107". Press the WARMER button repeatedly to increment the value from "43" to "107".

If you make a mistake, you can decrement the value by pressing the COOLER button.

7) To permanently save the new value, hold the FRONT DEFROST and the A/C buttons simultaneously until the new override value flashes once.

8) You're done. Press OFF repeatedly to "back out" of the diagnostic system. You'll probably need to press OFF 5 or 6 times to get out of the deep "menu structure" you're in now.

Now, the coolant temp (in units specified) should be one "stop" along the revolving door we call the DIC. If you are in metric units, the coolant temp will read in *C. If you are in standard units, it'll read in *F.

Good luck!

BTW: the book warns against incorrectly storing an override value to the system. It said you can permanently damage the IPC by doing this. I don't know how, and have never heard of anyone doing damage to their car, but the book says the danger exists. It says if you ever make a mistake, repeatedly press OFF to completely exit the diagnostic system and start over again
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end of quote...
http://www.cadillacforums.com/report.php?p=115732
 

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Didn't work on a '93, no "E" option... Just 00, 08, 45 and a couple others... I'll take a look at the manual this evening and see if there is something similar for the early cars.
 

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Hi, I was wondering if we do change it, could it be changed back? The reason I am asking is because of Warranty issues. Warranty places look for anything to void one's warranty.. Those money grubbing [email protected]@rd!
 

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hkd said:
I just changed mine to 127 (in theory everything turned on) but I'm not getting the RPM message.

I think you have to do it one item at a time.


I'm gonna check to see if its possible on my 94...

From the charts, I don't think it's possible to do it on OBD-I cars... You can override a few things but the chart is vague on what you're overiding. It just says "Option 1 override, Option 2 override, ect." If you did override them it would let you input a perameter from 0-255

If anyone wants the charts you can e-mail me at;

Krashed989 @ gmail.com

Take out the spaces.
 

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:) Ok, pleased to report that the above referenced display mod works on my '01 ETC - I just followed the directions explicitly and everything worked just fine.
My analog temp gauge had always read just a needle's width past half in normal (30-90MPH) cruising - maybe a tick higher sitting in traffic this last summer with the A/C on and ambient outside temp about 95F. But I was really curious to see what the coolant temp actually was.
My digital readout shows that to be in the range of 195-199 or so. Could not get it to break the 200 degree mark. Drove around the block a few times, maybe 4-5 miles worth, and then let it idle for 5 minutes when I got home. Pegged at 199F
Granted, I didn't push the car too hard, but it would appear that for any of you analog dash owners that don't want to mess with the IPC overrides, the half-way mark on the coolant temp gauge is perfectly safe, if not almost too cool.
I'll report back after I've gone out and done some harder miles.
 

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worked excellent for me. thanks alot.

to have all options turned on u have to add them one by one.
you start with 43 + 64= 107 (coolant temp) then 107 + 16= 123(RPM) and so on

but it seems that the digital Mph read out is higher than the analog one
 

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ironsabbath said:
worked excellent for me. thanks alot.

to have all options turned on u have to add them one by one.
you start with 43 + 64= 107 (coolant temp) then 107 + 16= 123(RPM) and so on

but it seems that the digital Mph read out is higher than the analog one
what year is yours?
 

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Update - not sure if it applies across the board, but noticed an odd thing. Gassed up this afternoon, and, as is my usual practice, I went to re-set the Gallons-Used number and Trip counter. The trip counter reset to zero, but the Gallons-used, and then, after testing, none of the other re-settable DIC numbers would reset - Avg MPG, Avg MPH, Gallons Used would not reset to zero.

Not sure if this is related to the DIC mod this thread pertains to, but I'd like to hear from any others of you if you made the mod, and then have the same experience with your "INFO RESET" button....
 

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I have done what you said,everything works well,no tach though.I see that my car runs about 201,and the highest i seen it go up to was 221 degree's.I guess this is normal operating temp for these cars?
 
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