Question about 1999 Cadillac DeVille

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Accessing diagnostics mode on 1999 cadillac deville

I read that you can access diagnostics mode in this vehicle by depressing the off and warmer buttons on the heater control panel! Supposedly if you wait for the self checks to run the "pcm?" funtion comes up and you can select it with the high button and then scroll through data,override and clear codes. When I select the pcm? with the high button it goes streight to clear codes, I dont get data or override to show up. Am I doing something wrong or is there a problem with the pcm diagnostics?

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6 Suggested Answers

  • 3 Answers

SOURCE: Fuel Data Center and Electronic Climate Control not funtioning

This is defenetly the BCM, I had a 1990 with all of the same problems. Buy a rebuilt and install it behind the clove box. Remember that you must install you memory prom into the new unit as they don't come with any in them (it is what is memorizing your miles driven.) You will get off pretty easy on this one as they are available and not too expensive.

Posted on Jan 29, 2009

motor1258
  • 6674 Answers

SOURCE: Check engine light on, 1997 cadillac Deville.PCM codes

PO135 is oxygen sensor Bank1 sensor1. PO404 is EGR.
personally, I'd pull EGR off, clean pintle good with throttle body cleaner or carb cleaner, re-install, erase codes & try it for a while & see if it code(s) come back.

Posted on May 07, 2009

redbeard00
  • 957 Answers

SOURCE: 94 Cadillac DeVille: Car would only run for 20

When the car has the crank/no start, at that point see which is missing. Test for fuel and spark. I think it has to do with fuel, a tired fuel pump or relay. But remember to check the oil sending unit. If it fails it will shut down the fuel system.

Posted on Jun 18, 2009

  • 1986 Answers

SOURCE: How to take driver's side door panel off to access

On the inside trim, you can remove screws that are by the door handle, arm rest, under door and side of door and then gently pull back on the panel as there will also be retaining clips attached and you don't want to break them. You'll need to lift the door panel upwards in order to get it off the window ledge. Then you'll need to manipulate the panel and disconnect the door handle linkage from the door handle and disconnect the wiring for your controls. Then pull back the weather seal...

Posted on Oct 21, 2009

1fastbob
  • 301 Answers

SOURCE: my 2001 cadillac deville keeps giving me dtc code system to lean

Anytime I get a too lean DTC I first change the fuel filter if it hasn't been changed in awhile. You'd be surprised how many times this has helped.

Good Luck with it.

Bob

Posted on Oct 22, 2009

  • 1810 Answers

SOURCE: heat on the passenger side comes out cold, and

you might need a thermostat

Posted on Jan 07, 2010

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My 98 Cad Deville will not start it says anti theft problem


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How do I program a Cadillac 2004 Deville remote key fob?


came across this, maybe this will help out...this is for analog gauges....

With the ignition in the "RUN" position (engine does not necessarily need to be running, but it will work either way).
Press OFF and WARMER (or the OFF and PASSENGER WARMER buttons) on climate control panel simultaneously. Instrument Panel Cluster (IPC) will light all telltales, then go blank. System is now in DIAGNOSTIC MODE. After diagnostic mode cycles through and stops, press FAN DOWN button until "RFA?" is displayed, then press FAN UP. If "RFA DATA?" is displayed, press FAN DOWN. If "RFA OVERRIDE?" is displayed press FAN UP button.

If "RFA S00 NO OVERRIDE" is displayed, press FAN DOWN. If "RFA S01 PROGRAM FOB #1" is displayed, press FAN UP button.

IPC will show "0" on right side of Drivers Information Center (DIC) display. Press WARMER button on the climate control unit until "99" is displayed.

Press and hold TRUNK button on the transmitter. While holding TRUNK button, press LOCK button and hold both buttons for a total of 3 seconds. Locks will cycle when programming is complete. If transmitter is not programmed within 30 seconds after entering "99" on the display, system will default and you must begin at step #2 again.
To program second transmitter, press FAN DOWN button until "RF S02 PROGRAM FOB #2" is displayed, then press FAN UP. Repeat step #4.

To exit system, press AUTO, MODE UP, MODE DOWN, or RESET button.
__________________

Oct 30, 2010 | 2004 Cadillac Deville

1 Answer

Po741 fault code


P0741 Torque Converter Clutch (TCC) mechanical system performance.The solenoid is accessed by dropping the drivers side of the subframe and removing the side cover of the transmission. most techs wish it was just a matter of dropping the pan as it is a common repair to replace the solenoid

Read more: http://www.justanswer.com/questions/1qmu8-showing-a-p0741-code-can-the-torque-converter-solenoid-be#ixzz0oDbraI1W
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1999-2004 Cadillac DeVille
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Read more: http://www.justanswer.com/questions/1qmu8-showing-a-p0741-code-can-the-torque-converter-solenoid-be#ixzz0oDcDgKrG

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2 Answers

How can I check the computer for alarms in the past and how do I clear them so I can trouble shoot a problem? where do I get a list of the code? for a 1999 Cadillac deville. Thanks


HOW TO "ENTER" DIAGNOSTIC MODE OBDII

To enter diagnostic mode, proceed as follows:

1. Turn ignition "ON." Engine can be either OFF or RUNNING.

For cars equipped with the Digital Instrument Panel Display (Digital IPC):
2. Simultaneously press the "OFF and "WARMER" (red) buttons on climate control center (CCC) until all display segments (IPC and CCP) are illuminated

For cars equipped with the Analog Instrument Panel Display (Analog IPC):
3. Simultaneously press on the Climate Control Panel (CCP) the "OFF" and "PASS WARMER" (up arrow) buttons.

After the segment display test, the driver message center displays all set DTC, current and history, in the following order:

1. PCM DTC
2. IPC DTC
3. ACM DTC
4. SDM DTC
5. TCS DTC
6. PZM DTC
7. IRC DTC
8. RFA DTC
9. CCP DTC
10. MSM DTC
11. MMM DTC
12. PHN DTC

The RSS, CCP, MSM, MMM and PHN DTC appear only on vehicles equipped with these options. Press the FAN DOWN button in order to bypass the DTC display.

On the OBD II cars, the prefixes you'll see are: "IP" for the IPC instrument panel; "AC" for air conditioning module; "TC" for traction control; "RS" for the road suspension system; "SD" for the air bags; "PZ" for the body control module; "CC" for the cell phone; "RF" for the integrated radio system.



HOW TO "EXIT" DIAGNOSTIC MODE

To exit the diagnostic mode anytime during the test, depress the "ECON" or "DEFOG" button, or turn the ignition switch "OFF." .

You don't need a scan tool for these cars,as it is all built in.

Go to the following website for a list of trouble codes.

http://myweb.accessus.net/~090/dtcobd2.html

Add a comment to your post if you require any further assistance.

Hope this helps.

Oct 07, 2009 | 1999 Cadillac DeVille

4 Answers

Engine needs service soon won't go off


On these cars no scan tool is needed, you can run a self diagnostic check from the dashboard as it is all built in.

To enter diagnostic mode, proceed as follows:
  1. Turn ignition "ON." Engine can be either OFF or RUNNING. For cars equipped with the Digital Instrument Panel Display (Digital IPC):
  2. Simultaneously press the "OFF and "WARMER" (red) buttons on climate control center (CCC) until all display segments (IPC and CCP) are illuminated For cars equipped with the Analog Instrument Panel Display (Analog IPC):
  3. Simultaneously press on the Climate Control Panel (CCP) the "OFF" and "PASS WARMER" (up arrow) buttons.
After the segment display test, the driver message center displays all set trouble codes, current and history, in the following order:
  1. PCM DTC
  2. IPC DTC
  3. ACM DTC
  4. SDM DTC
  5. TCS DTC
  6. PZM DTC
  7. IRC DTC
  8. RFA DTC
  9. CCP DTC
  10. MSM DTC
  11. MMM DTC
  12. PHN DTC
  13. The RSS, CCP, MSM, MMM and PHN DTC appear only on vehicles equipped with these options. Press the FAN DOWN button in order to bypass the DTC display.
On the OBD II cars, the prefixes you'll see are: "IP" for the IPC instrument panel; "AC" for air conditioning module; "TC" for traction control; "RS" for the road suspension system; "SD" for the air bags; "PZ" for the body control module; "CC" for the cell phone; "RF" for the integrated radio system.

To exit the diagnostic mode anytime during the test, depress the "ECON" or "DEFOG" button, or turn the ignition switch "OFF."

Write down the list of trouble codes and report back here.

Sep 20, 2009 | 1999 Cadillac DeVille

2 Answers

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1 Answer

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I would bet that the problem is one of the front wheel bearing sensors. I would think on that car you would be able to run the self diagnostic check. You press the OFF and WARMER buttons at the same time to access the diagnostic mode. There is a list of what the diagnostic codes are at http://myweb.accessus.net/~090/dtcobd1.html#tcs

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1 Answer

1997 cadillac deville concours stability reduced message


press and hold the off and red warmer button on your ac control panel / the display should then go into diagnostic mode.  all the trouble codes can be read out to help in tracing down the problem. you can also read out other info by pressing the temp up or down button when in diag. mode.   press the off button when your done.

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1 Answer

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the climate control is intergrated through the pcm and ecm i would advise you to take the vehicle to the service shop they have a diagnostic scanner that will access the ecm and either clear a code that prevents the climate control from working or find a more severe problem that requires you to replace the hole unit. please rate this solution. thank you and good luck.

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A/C systems are hard to diagnose without having access to the vehicle. One of the most common problems is undercharge (Not enough freon in the system) indicating a leak somewhere in the system. Other causes could be a burnt A/C compressor clutch fuse, defective compressor clutch, defective compressor/belt, defective High/Low pressure switches in the system, defective evaporator icing switch, defective wiring... Basically, you're better off getting the system diagnosed by a good A/C knowledgeable mechanic...

Aug 09, 2008 | 1999 Cadillac DeVille

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