How to relearn the crank position variation variation?
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 scanner.
What are the instructions for Crank relearning?
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. We were unable to load Disqus.
Can a single crank sensor diagnose a cam problem?
So if you have a cam timing problem, you could also do this with one single cam sensor and a single crank sensor. But if you have some sort of timing issue that you want to look at, check the correlation between them and that should help you diagnose it.
How to change the crankshaft position of a car?
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 scanner. 5.
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 scanner.
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. We were unable to load Disqus.
What does ” crank relearn ” mean on a GM engine?
“Crank relearn” refers to a GM service procedure that has to do with the calibration of the PCM to a specific engine’s crankshaft position sensor (CKP sensor). When your Gen III (LS1, etc) or Gen IV (LS2, etc) based car or truck was put together and factory-tested, one of the procedures it went through was the “crank learn” procedure.
Can a PCM erase the learned crankshaft position variation?
Disconnecting the PCM will not erase the learned Crankshaft Position System Variation as long as the ignition switch is in the OFF position. Important: Reprogramming the PCM does not require running the Crankshaft Position System Variation Learn Procedure unless the PCM is new or from another vehicle.
When to do a crankshaft variation relearn?
Crankshaft Variation Relearn Procedure must be performed if: • ECC was reprogrammed. • Crankshaft position sensor has been replaced. • ECC has been replaced. Follow the relearn procedure outlined below: 1. Install scan tool on Data Link Connector (DLC) located under the dash. Apply parking brake and block wheels. Insure hood is closed. 2.
When to run the CKP sensor variation relearn guide?
CAUTION: Ensure throttle is quickly released to idle position once CKP sensor variation learn procedure fuel cut off is obtained and engine starts to decelerate. IMPORTANT: After the ignition switch is turned to the CRANK position, the VCM must see a change in the state of brake switch (released to applied) to run the learn procedure.
How to relearn GM crankshaft position sensor variation guide?
IMPORTANT: After the ignition switch is turned to the CRANK position, the VCM must see a change in the state of brake switch (released to applied) to run the learn procedure. Also, the service brakes, and the parking brake must be held throughout the duration of the learn procedure. 4) Gradually accelerate engine to required RPM.