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Pull the GM Diagnostic OBD CODES .. how ?

  #1  
Old 01-25-2008, 12:18 PM
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Default Pull the GM Diagnostic OBD CODES .. how ?


When your Caddy has problems,
WE NEED THE CODES.
PLEASE PULL THE CODES !

GM uses OBD-1, OBD-II, OBD-III Codes

Ohh, you dont know how to do it?
Here are a couple of help threads:

this 1st one is very detailed ..
https://www.cadillacforum.com/m_11904/tm.htm

these have additional info and links
https://www.cadillacforum.com/m_12932/tm.htm
https://www.cadillacforum.com/m_15478/tm.htm
hhttps://www.cadillacforum.com/m_17425/tm.htm




 
  #2  
Old 06-21-2008, 11:10 AM
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Default RE: Pull the GM Diagnostic OBD CODES .. how ?

how do i go about resetting my obd systems I had some old codes and trying to make sure the ones i have at the momment is new and needto know how to fix them . PO171 & PO174 both are too lean codes, PO300 ramdon misfire but it not, PO603 memory error,P1632 THEFT SYETEM FUEL, AND last is the TCC PO741stuck off
 
  #3  
Old 06-21-2008, 11:15 AM
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Default RE: Pull the GM Diagnostic OBD CODES .. how ?

forget to tell you the year is 1996 deville
 
  #4  
Old 06-21-2008, 12:50 PM
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Default RE: Pull the GM Diagnostic OBD CODES .. how ?

Disconnect the battery for a few minutes.

or try this

PRESS:
OFF & WARM (red button) together
- the D.I.C. will light up the instrument cluster like a Christmas tree
- the D.I.C. will start diagnostics, as soon as it starts displaying ..

PRESS:
LO
- until "
ECM
" comes up

PRESS:
HI
- until "
CLEAR CODES ?
" comes up

PRESS:
HI
- press only once
- response will be in a few seconds:
CODES CLEARED


you are done ...

PRESS RESET and you are back to normal

 
  #5  
Old 08-17-2009, 02:51 PM
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Default

Do older Cadillacs (1968's) have codes?
 
  #6  
Old 09-06-2009, 10:04 PM
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Question hmmmmm

do you clear the codes on a 95 sls the same way?
 
  #7  
Old 09-07-2009, 01:18 AM
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Originally Posted by othello1968coupe View Post
Do older Cadillacs (1968's) have codes?
no ...


Originally Posted by jons95sls View Post
do you clear the codes on a 95 sls the same way?
yes ...


.
 
  #8  
Old 09-07-2009, 07:42 AM
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Default sls

thank you.
 
  #9  
Old 09-07-2009, 10:12 PM
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Default hmmmm

i tried to clear my codes i never found the ecm to clear it now what do i need to do?
thank you
 
  #10  
Old 09-08-2009, 09:00 PM
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After all the codes are displayed, DIC should display "PCM". Press high blower button and you will be in the ECM/PCM module options. Press low for no and high for yes for what comes up. on 82-95 Cadillac powered models scanner is not required, diagnostics intended for use with "on-board diagnostics". 80-81 DFI or 8-6-4 are unique to themselves, still have "on board" but access and data are different. Cimmaron and 86-96 RWD Fleetwood or Brougham require scanners. EFI - no onboard, no scanner, nor codes "Symptom Charts"...FSM,DVOM, and a prayer or two.
 

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