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Discussion Starter #1
Info system indicates all monitored systems okay but I am getting a service engine soon display in dashboard cluster. Any ideas
 

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Have you pullked the codes or are you just taking the msg off the dash?

There are tons of threads on pulling codes. Go to the sticky at the Northstar section.
 

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zonie77 said:
Have you pullked the codes or are you just taking the msg off the dash?

There are tons of threads on pulling codes. Go to the sticky at the Northstar section.
Look at this thread. It will tell you how to check the codes and interpret what they mean. Post the results here as well as the year and model of your car. Someone will probably be able to help you. Good luck!

http://www.cadillacforums.com/forums/showthread.php?t=53635
 

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Discussion Starter #6
I can't seem to pull the codes.It is a 98 Eldorado and the instructions state to use the buttons to the right of the Info button. I tried using the off button and the passager warmer button in various combinations with the Info button but the codes don't come up. I have the ignition on but not running.
 

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I must be missing something.
I went to the thread and it references the three switches to the right of the DIC. I don't have three switches. The layout I have is; Trip Reset with the word yes above it, then a Info reset with word no above it, then the large info button with the word skip above it, then the fuel door switch and the trunk switch. The only on/off button is in the climate control near the passenger warm/cool button located in the lower section. I tried using the on/off and the passenger switch and nothing happens. Any help would be appreciated
 

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For your car, the code-access is via the Climate Control Panel, NOT the DIC. Use the link that mcowden posted for you... those instructions are more clear.

You have to have the ignition-key ON for this, but the engine doesn't have to be running. Getting into the mode requires pushing the OFF and Passenger-Warmer UP button simultaneously for several seconds until you see the Dash Light Test (almost all dash indicators turn on). Then just watch your one-line text display and the car will cycle to each code (about 2 seconds each) and end with "PCM?" If you want to make it cycle again (because you missed some of them), hit the OFF button once. If you want to exit, then hit the OFF button twice, or turn off the ignition-key.

Have pencil/paper ready to write the codes down as they are displayed. Don't forget to record if they are "Current" or "History".

Let us know what they are.
 

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Well... I assumed that a 98 is the same because my son has a 97 ETC and I have a 99 ETC and you access the codes in both cars the same way.

However, I do believe that Sevilles may have different methods, although I don't know that for certain.

Maybe a non-ETC is different than an ETC, but I don't think so.
 

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Ah, there is the difference. I was assuming that Eldo and Seville were the same. What I posted was for Seville.
 

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Discussion Starter #13
The codes are retrieved with the Climate control off button and Pass warmer up button. The codes listed are in the sequence as they came up;
PCM P0442, PCM P0603, IPC B1552, IPC B1910, IPC B1983, ACM B1348,
ACM B1983, SDM B1161, SDM B1327, NO TCS CODES, PZM B1552,
PZM B1983, IRC B1983, IRC U1129, RFA U1300,
NO CCP CODES
I have had the Eldo for 4 years and the codes have never been cleared.
Thanks for any help
 

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walterroc said:
The codes are retrieved with the Climate control off button and Pass warmer up button. The codes listed are in the sequence as they came up;
PCM P0442, PCM P0603, IPC B1552, IPC B1910, IPC B1983, ACM B1348,
ACM B1983, SDM B1161, SDM B1327, NO TCS CODES, PZM B1552,
PZM B1983, IRC B1983, IRC U1129, RFA U1300,
NO CCP CODES
I have had the Eldo for 4 years and the codes have never been cleared.
Thanks for any help
Look up the codes here and post the translations so we can help you. We also need to know if those codes are History or Current. The part you need to look up is the single letter followed by three digits, so P0603, etc.:

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

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Discussion Starter #15
All the codes are history. p0442 is Evaporative EVAP small leak detected.
p0603 is Control module long term memory reset.
b1552 is Keep alive memory KAM error.
b1910 Generator L terminal open.
b1983 Device power circuit low.
The remining codes I believe are the result of
a battery problem I had because the Negative terminal loosened up and prevented a good charging circuit. It looks like I need to inspect Evaporative system. Maybe a hose. If you have another suggestion that would be great. I think I will disconnect the PCM and reset the codes, what do you think.
 

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Do not disconnect anything. You'll just create a bunch more codes.

Just go thru your Climate Control method and for each module, when it asks "PCM?", "TCS?", "IPC?" etc., it's asking you if you wish to drop down into the menu for that module. You say YES by pushing the Fan Speed UP button, and you say NO by pushing the Fan Speed DOWN button.

For example, if you have any PCM codes to clear, then when it asks "PCM?", say YES. Then it will ask "PCM CODES?", say NO (because you already know what they are). It may present other questions about the PCM, but keep saying NO until it asks "PCM CLEAR CODES?", say YES and it will clear all PCM codes.

Then you hit the OFF button to go back up one level in the Menu System. Tap the OFF button until you get back to "PCM?". Now say NO and it will move to the next module.

Side note: If you keep tapping OFF, it will back out all the way back to the Light-Test and start all over again... or tap OFF during the Light Test and you'll exit Diagnostic Mode altogether and be back at your normal dash-board.

You do this for each module, one at a time, to clear all codes. It's long-winded and cumbersome, but gets the job done.

---OR---

You say to yourself, "Gee these codes are nice to know, but what a pain in the ass. I think I'll buy myself a little scan-tool." The price runs the whole price range from 20 dollars for a cheap reader-only, to several thousand bucks for what the Pros use. For 30 or 40 dollars, you can get one that will read all codes at once, and clear them all at once, and it will do it for most ANY car from 96-on. There's a connector to plug the scan-tool into, under the left side of the dash on the driver's side.
 

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Rock said:
Do not disconnect anything. You'll just create a bunch more codes.
Just go thru your Climate Control method and for each module, when it asks "PCM?", "TCS?", "IPC?" etc., it's asking you if you wish to drop down into the menu for that module. You say YES by pushing the Fan Speed UP button, and you say NO by pushing the Fan Speed DOWN button.
For example, if you have any PCM codes to clear, then when it asks "PCM?", say YES. Then it will ask "PCM CODES?", say NO (because you already know what they are). It may present other questions about the PCM, but keep saying NO until it asks "PCM CLEAR CODES?", say YES and it will clear all PCM codes.
Then you hit the OFF button to go back up one level in the Menu System. Tap the OFF button until you get back to "PCM?". Now say NO and it will move to the next module.
Side note: If you keep tapping OFF, it will back out all the way back to the Light-Test and start all over again... or tap OFF during the Light Test and you'll exit Diagnostic Mode altogether and be back at your normal dash-board.
You do this for each module, one at a time, to clear all codes. It's long-winded and cumbersome, but gets the job done.
---OR---
You say to yourself, "Gee these codes are nice to know, but what a pain in the ass. I think I'll buy myself a little scan-tool." The price runs the whole price range from 20 dollars for a cheap reader-only, to several thousand bucks for what the Pros use. For 30 or 40 dollars, you can get one that will read all codes at once, and clear them all at once, and it will do it for most ANY car from 96-on. There's a connector to plug the scan-tool into, under the left side of the dash on the driver's side.

Great post, Rock! Do you mind if I incorporate your description into the "how to check codes" sticky in the Northstar and Tech Tips sections?
 

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Discussion Starter #20
Thanks to Ranger and Rock. You helped me and I got a little more education about my car. This is a darn good site. Now I will tackle the A/C blower R&R.
 
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