For my need to know what's going on in my car, I purchased a ScanTool and picked up a P1336 scan, which via an early post means that a CASE relearn is necessary. This is understandable, as a new transmission was just put into the vehicle. I have an '02 SS, and I was wondering if anyone had any idea of how to do a CASE relearn with only a ScanTool and myself. Any help would be greatly appreciated. Thanks.

-Adrian

 

Googled this:
http://www.fullsizechevy.com/forums/...t-relearn.html

Here is the procedures GM uses to do Computer Relearn. This includes CASE (crankshaft variation relearn)

Thanks go to OKIE5.3 for researching and posting on another forum

FWIW here are some GM Relearn Procedures.

GENERAL MOTORS VEHICLE COMPUTER RELEARN PROCEDURES

Performing any of the following repairs may require you to initiate a computer relearn procedure in order to restore proper vehicle operation.

Powertrain Control Computer replacement with a nontransferable PROM
Powertrain Control Computer reprogramming
Body Control Computer
Instrument Cluster replacement
Engine replacement
Crankshaft replacement
Crankshaft harmonic balancer replacement
Crankshaft position sensor replacement
Diesel Engine controller
Diesel engine PCM with or without injection pump replacement
Diesel engine front cover replacement.

Here are some helpful tips to perform the system relearn, depending upon the particular repair that you have performed.

Powertrain Control Computer Replacement with a nontransferable PROM

All computers being replaced must be reprogrammed or “reflashed”. This is so the replacement computer has the most up-to-date information for that particular vehicle. This information is specific for the vehicle based on the vehicle identification number, and cannot be used on another vehicle, even though they may appear to be similar. Relearn procedures involve: Crankshaft Variation (CASE Learn), Engine Idle speed, Theft Deterrent password, and Transmission adaptive shift points.

Powertrain Control Computer Reprogramming

If diagnostics reveal that a reprogram or re-flash of the computer is necessary, relearn procedures involve:

Crankshaft Variation (CASE Learn), Engine Idle speed, Theft Deterrent password, and Transmission adaptive shift points. Body Control Computer &/or Instrument Cluster replacement Theft deterrent password relearn is necessary. Engine, crankshaft, harmonic balancer, and crankshaft position sensor. If any of the above items are replaced, then a Crankshaft Variation relearn is necessary.

RELEARN PROCEDURES

IMPORTANT: Please note that the Theft Deterrent Password Relearn must be performed first, otherwise the vehicle may not start.

THEFT DETERRENT PASSWORD RELEARN

General Motors uses three different types of vehicle theft deterrent systems in their cars and trucks manufactured from 1986.

They are:

1. Pass-key or Passkey 2 (PK2)
2. Passlock
3. Passkey 3 (PK3) or Passkey 3+

Instead of listing all of the vehicles and the systems that they use, we will simplify the identification process by taking a look at the vehicle ignition key (Refer to page 8 for key identification). There is one other system, referred to as VATS (Vehicle Anti-theft System) that is used by GM. This system is similar to Passkey, but since a relearn is not necessary, we will not elaborate on this system in this article. By referring to the chart and matching the correct key, you can safely identify the system that the vehicle uses, and, in turn, determine the correct relearn procedure. Just remember, that this article pertains only to those vehicles with a re-programmable or “re-flashable” PCM.


PASSKEY & PASSKEY 2

This system consists of: the Powertrain Control Module (ECM or PCM), Body Control Module (BCM) or Passkey theft deterrent module, and the ignition lock and key. In most cases, the theft deterrent duties are handled by a Passkey module. In those vehicles, if you are replacing a key, all you must do is match the resistance of the existing key that is in use. If you replace the theft deterrent mod

 

Found this:

http://www.bsecorp.com/files/techtips/ST9303l.pdf

 

......and this:

http://www.cardone.com/English/Club/...70-77-0003.pdf

 

Heck, I just googles "p1336 relearn."

Got too many articles.

 

Thanks, I came up with the first one, but was a bit confused with the idea of relearning the theft deterrent passwords and such. I did read down a bit farther where there was a tip of how to do it without the scan tool. I will probably head out tonight to do that, clear the code and see where that gets me. Thanks for the help!

-Adrian

 

I have replaced my crankshaft position sensors and wonder if I need a relearn procedure. I do not get a P1336 code. I just have a P0336 code.

 

I have a 1997 monte carlo with a 3.1 with a P0336 after I have replaced both crankshaft position sensors. I have had problems trying the relearn procedure that doesn't use a scanner since the trouble code returns pretty quickly after I clear it. The car seems to run decent but I would like to get rid of the SES light. Thanks for any help.

 

Word has it you cannot do it without the right tools.

BTW, what are the right tools. Do we have a list?

EDIT: I found this in the docs. I do not know if this will work for our MCs:

If the Crankshaft Variation
Relearn is not accessible through
your scan tool (some truck
applications 1998 & later), perform
the relearn in the following
manner:

1. Turn off all of the accessories.
With the Air temperature sensor and
Coolant temperature within 5 degrees
(Centigrade) of each other, start the
engine and let it idle in Park or
Neutral for two minutes.

2. Accelerate the vehicle to 55 mph at
part throttle. Cruise at 55 mph for 8-
10 minutes until the engine reaches
operating temperature.

3. Cruise at 55 mph for another 5-6
minutes.

4. Decelerate to 45 mph without
using the brakes, and maintain 45
mph for 1 minute.

5. Perform 4 deceleration cycles,
without using the brakes, of 25
seconds each where no specific
speed is necessary. Returning to 45
mph for 15 seconds in between
deceleration cycles.

6. Accelerate to 55 mph and cruise
for 2 minutes.

7. Stop the vehicle and idle for 2
minutes with the brake applied and
the transmission in Drive (automatic
trans.) or Neutral (manual trans.)
with the clutch depressed.

 

With a tech 2 it takes like 3 seconds to do a crank variation relearn.



EDIT: Who the hell keeps bumping these old threads? Goes back to 2007, with one post in 2011, and a few in 2012.