Clear trouble codes - JeepForum.com
 
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post #1 of 11 Old 03-06-2014, 11:02 PM Thread Starter
Danny222
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1991 YJ Wrangler 
 
Join Date: Mar 2014
Location: Budapest
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Clear trouble codes

Hí !

I disconnected the battery, wait 30 mins, then connected +/- , than connected back to battery, but the trouble codes not cleared.
Any way? Thanks!

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post #2 of 11 Old 03-07-2014, 03:12 AM Thread Starter
Danny222
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1991 YJ Wrangler 
 
Join Date: Mar 2014
Location: Budapest
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Quote:
Originally Posted by Danny222 View Post
Hí !

I disconnected the battery, wait 30 mins, then connected +/- , than connected back to battery, but the trouble codes not cleared.
Any way? Thanks!
OK! I got it:

This very simple procedure will Erase the “Adaptive Memory” stored inside the TJ PCM and allow a new “Adaptive Memory” to be developed.

After performing this procedure the PCM will re-learn and store into Adaptive Memory your engines performance characteristics.

[L]Disconnect the POSITIVE battery Terminal and touch it to ground for 30 seconds. (This is to discharge the PCM capacitors, which maintain the Adaptive Memory.
Reconnect the Battery Cable
Turn Ignition Switch to the “On” position but DO NOT start the engine
Turn Headlight “On”
Turn Headlights “Off”
Turn Ignition Key “Off”[/L]

Adaptive memory has now been flashed, or erased from the PCM.

When you start the engine it will be running off a set of pre-programmed tables that come with the PCM from the factory.

When you get the engine up to operating temperature the PCM will start to collect data for the “Adaptive Memory”.

The PCM will collect data for Adaptive Memory for the first 50 Warm-up Cycles.
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post #3 of 11 Old 03-07-2014, 03:36 AM
Mark05059
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1989 YJ Wrangler 
 
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Location: quechee Vermont
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yes.. thats to clear the PCM codes on a TJ model. Do you have a TJ or a YJ?

1998 ZJ 5.2 Auto

1989 Wrangler Black Bone Stock 2.5l 5spd
/l , [____],
|---L--[]lllllll[]-
()_) ()_)==O=)_)
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post #4 of 11 Old 03-07-2014, 05:49 AM
Que89YJ
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1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit
Posts: 21,072
His picture is a YJ. On the YJ, it is just a matter of disconnecting the battery for 10 seconds. That is all it needs. No headlights or touching leads together. Just disconnect the battery. The computer will always show 12,33, and 55 after a reset.
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post #5 of 11 Old 03-07-2014, 05:50 AM
Que89YJ
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1989 YJ Wrangler 
 
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Danny please fill out the profile information for the Jeep. It helps us to help you.
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post #6 of 11 Old 03-07-2014, 12:54 PM Thread Starter
Danny222
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1991 YJ Wrangler 
 
Join Date: Mar 2014
Location: Budapest
Posts: 8
Thank you, I'm ready with code cleaning!

Now I have the new codes ) 11, 41,

11 is ignition
41 is alternator field

What to do?

( I love this car, I got it 2 weeks ago, )
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post #7 of 11 Old 03-07-2014, 01:40 PM
Que89YJ
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1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit
Posts: 21,072
11 is the crank position sensor. 41 can be the alternator or the control for the alternator. Are you having issues with the performance?
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post #8 of 11 Old 03-07-2014, 11:28 PM Thread Starter
Danny222
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1991 YJ Wrangler 
 
Join Date: Mar 2014
Location: Budapest
Posts: 8
bit difficult to start, 5-10 seconds,
the voltage was around 14 volts
I have to change all the sensors I think
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post #9 of 11 Old 03-08-2014, 04:45 AM
Que89YJ
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1989 YJ Wrangler 
 
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Location: Detroit
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Replace the crank position sensor first. Then do a battery reset and see if the fault clears.
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post #10 of 11 Old 03-08-2014, 09:02 AM
Apollo12227
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1992 YJ Wrangler 
 
Join Date: Oct 2009
Location: Orlando
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Quote:
Originally Posted by Que89YJ View Post
Replace the crank position sensor first. Then do a battery reset and see if the fault clears.
Que, to my understanding code 11 is for the "ignition" in general correct? I was under the impression that code 11 crank sensor was for OBDII readouts. My haynes says for the 4.0 code 11 is "ignition".

The only reason I bring this up is years ago I was throwing a code 11 and it turned out to be a fuel pump wire that was shorting out as it went over the tcase.
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post #11 of 11 Old 03-08-2014, 11:19 PM Thread Starter
Danny222
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1991 YJ Wrangler 
 
Join Date: Mar 2014
Location: Budapest
Posts: 8
I just ordered all the sensors from Morris 4x4, after replace I'll tell the result
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