Motor Replaced, Secutiry Light, No Crank - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
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post #1 of 7 (permalink) Old 03-20-2013, 02:49 PM Thread Starter
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Motor Replaced, Secutiry Light, No Crank

as the title states. I replaced the motor in a 2006 Cobalt LS 2.2 5Speed. used the exisiting cars computer and everything else. even swapped most of the sensors. the motor is out of a Saturn Vue. anyway, the dash will illuminate. i get a power steering and Service air bag message, the radio says LOCKED on the screen, and the theft light is lit.

any idea on what i need to do to get this thing running?

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post #2 of 7 (permalink) Old 03-20-2013, 03:21 PM
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try unplugging the battery and removing and reinstalling the fuse for ECM and crank relay

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post #3 of 7 (permalink) Old 03-20-2013, 03:22 PM Thread Starter
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alright, battery has been disconnected for over 6 months. but i will try and R&R the fuse and relay tonight when i get home.

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post #4 of 7 (permalink) Old 03-20-2013, 04:17 PM
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my guess is your crank relay. that's what happened to me when i pulled and put back in my motor

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post #5 of 7 (permalink) Old 03-20-2013, 05:04 PM
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Grand am's always had this problem and all you had to do was leave the key in the on position for 10 mins until the light went out. Worth a shot

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post #6 of 7 (permalink) Old 03-20-2013, 06:38 PM
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I don't know !

CRANKSHAFT VARIATION RELEARN (CASE Learn)

ĒCASEĒ means: crankshaft angle sensor error.
A crankshaft variation relearn must be performed if:

A diagnostic trouble code of P1336 is present.
The computer has been replaced or re-programmed.
The crankshaft position sensor has been replaced.
The engine, harmonic balancer, clutch, or flywheel
have been: disassembled, removed, or replaced.

The crankshaft position variation learning feature
enables the computer to compensate for part
manufacturing tolerances. This allows the computer
to accurately detect an engine misfire throughout the
engine RPM range. The learning process is stored in the
computerís memory and does not have to be repeated
unless one or more of the above conditions are present.


To perform the relearn, proceed as follows:

Connect a scan tool to make sure there are no trouble
codes stored in the computerís memory. If there is any
power train trouble code other than P1336
(Crankshaft Position Variation not learned),
the computer will disable the relearn function until the
problem that caused the code has been eliminated. Also,
make sure that the engine coolant
and oil levels are at an acceptable level.
(check it when the engine is cold)

1. Set the parking brake and block the drive wheels.
Make sure that the hood is closed.
2. Start the engine and make sure that the engine coolant
temperature is at least 158 degrees F. (70 degrees C.)
3. Turn the engine off for at least 10 seconds.
4. Select the crankshaft position variation learn procedure
(CASE Learn)on your scan tool.
5. Make sure that the transmission is in Park,
Start the engine.
6. Apply the brakes and hold the pedal firmly.
7. Follow the scan tool instructions.

Remember: That you are going to increase the
engine speed to approximately 4000 RPM.
Thatís the variation learn fuel cutoff RPM
(depending upon the engine), and that itís important
to release the throttle when the engine RPM starts to
decrease as a result of the fuel cutoff going into effect.
Failure to do such will result in over revving of the engine,
causing possible engine damage.

8. Once the engine has returned to idle, check
the status of Diagnostic trouble code P1336.
If the scan tool indicates that the CASE has been
learned, the relearn procedure is now complete.
If CASE has not been learned, check for the
presence of other power train codes.
If any exist, correct the problem,
then repeat this procedure.

---------- Post added at 07:36 PM ---------- Previous post was at 07:33 PM ----------

Nope not that ^^^^^

---------- Post added at 07:38 PM ---------- Previous post was at 07:36 PM ----------

Have you had the battery checked ?
These cars do funny things when the batteries start to go bad !

The case learn may be need to be done once you get it started and have a CEL on,

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Last edited by Cherry GT; 03-20-2013 at 06:41 PM.
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post #7 of 7 (permalink) Old 03-20-2013, 06:45 PM Thread Starter
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battery is sitting on a charger as we speak. ill run through some stuff tongiht and see where it gets me. thanks for the help guys!

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