crank relearn procedure wont work
10-20-2011, 12:12 AM
#1
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crank relearn procedure wont work \ i had let the my truck sit for about a weak and the battery got low, which gave a slight slow crank when i went to fire it up...
noticed a MIL Lamp was on, pulled the code p1336, (crank relearn needed basically..
what might cause it to need a re learn? ive got many hours of drive time on it. maybe 200 miles or little under since i got it running and never had this issue.
also, im using Tech 2 the Gm programmer, and trying to preform the relearn procedure im running into these issues,
i follow the procedure as tech 2 says, then when i hit continue for it to preform the relearn it says a error message " device control not authorized" or unavailable (something to that extent)
so i went through my parameters and looking through the transmission data i saw that it was saying i was in Current gear:2 vehicle speed:0 mph.
would this cause this error message i was getting? since it wants to see park or neutral....I also cant manually control the rpm through the tech 2 because its saying its in gear.
Ive tried manually shifting it through tech 2 and it wont go any lower than 1st and it dont make a difference which gear its in
Im assuming the reason it wont let me do the crank relearn is because it revs the engine, and it thinking its still in gear, so it would take off...even tho i have my th350 in park.
has anyone ran into this issue before? any solutions you can possibly think of?
i got my Ecm reflashed from brenden at LT1Swap.com
tuned for a 2002 5.3l lm7 Vin (T) no egr no vats, no evap.. and all of that other BS thats typically removed
Thanks for any info in advance
i got the Ecm reflashed supposly for a manual trans, so i could run my th350 with no problems.
noticed a MIL Lamp was on, pulled the code p1336, (crank relearn needed basically..
what might cause it to need a re learn? ive got many hours of drive time on it. maybe 200 miles or little under since i got it running and never had this issue.
also, im using Tech 2 the Gm programmer, and trying to preform the relearn procedure im running into these issues,
i follow the procedure as tech 2 says, then when i hit continue for it to preform the relearn it says a error message " device control not authorized" or unavailable (something to that extent)
so i went through my parameters and looking through the transmission data i saw that it was saying i was in Current gear:2 vehicle speed:0 mph.
would this cause this error message i was getting? since it wants to see park or neutral....I also cant manually control the rpm through the tech 2 because its saying its in gear.
Ive tried manually shifting it through tech 2 and it wont go any lower than 1st and it dont make a difference which gear its in
Im assuming the reason it wont let me do the crank relearn is because it revs the engine, and it thinking its still in gear, so it would take off...even tho i have my th350 in park.
has anyone ran into this issue before? any solutions you can possibly think of?
i got my Ecm reflashed from brenden at LT1Swap.com
tuned for a 2002 5.3l lm7 Vin (T) no egr no vats, no evap.. and all of that other BS thats typically removed
Thanks for any info in advance
i got the Ecm reflashed supposly for a manual trans, so i could run my th350 with no problems.
10-20-2011, 08:09 AM
#3
10-20-2011, 11:32 AM
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okay thats what i figured...
so having the ECM thinking its in second gear would be the cause for it not wanting to do crank re learn?
and what should have been removed? trans? or crank sensor relearn stuff?
so having the ECM thinking its in second gear would be the cause for it not wanting to do crank re learn?
and what should have been removed? trans? or crank sensor relearn stuff?
10-20-2011, 11:50 AM
#5
You have two options : figure out how to send the park/neutral signal to the pcm and perform the relearn or have the code P1336 turned off in the pcm. The only purpose of this is for misfire calculation in the pcm. The reason it lost the learned value is because the battery voltage got so low which it explained in the other post.
10-20-2011, 12:55 PM
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okay thats what i figured...
so having the ECM thinking its in second gear would be the cause for it not wanting to do crank re learn?
and what should have been removed? trans? or crank sensor relearn stuff?
so having the ECM thinking its in second gear would be the cause for it not wanting to do crank re learn?
and what should have been removed? trans? or crank sensor relearn stuff?
10-20-2011, 12:57 PM
#7
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You have two options : figure out how to send the park/neutral signal to the pcm and perform the relearn or have the code P1336 turned off in the pcm. The only purpose of this is for misfire calculation in the pcm. The reason it lost the learned value is because the battery voltage got so low which it explained in the other post.
would the ECM seeing second gear act as a torque management? and make it lug off the line?
it has always seemed to be doggy at full throttle.
45 psi fuel pressure at idle. 54 at WOT
