to perform the relearn, proceed as follows:
- Set the parking brake and block the drive wheels. Make sure that the hood is closed.
- Start the engine and make sure that the engine coolant temperature is at least 158 degrees F. (70 degrees C.)
- Turn the engine off for at least 10 seconds.
- Select the crankshaft position variation learn procedure (CASE Learn)on your scanner.
- Turn off all of the accessories. ...
- Accelerate the vehicle to 55 mph at part throttle. ...
- Cruise at 55 mph for another 5-6 minutes.
- Decelerate to 45 mph without using the brakes, and maintain 45 mph for 1 minute.
- Perform 4 deceleration cycles, without using the brakes, of 25 seconds each where no specific speed is necessary.
How do I perform a crankshaft position variation learn procedure?
Start the engine and make sure that the engine coolant temperature is at least 158 degrees F. (70 degrees C.) Turn the engine off for at least 10 seconds. Select the crankshaft position variation learn procedure (CASE Learn)on your scanner. Make sure that the transmission is in Park. Start the engine. Apply the brakes and hold the pedal firmly.
How to relearn a crankshaft position sensor?
This entire process of relearning the crankshaft position sensor is called the “CKP (Crankshaft Position) Variation Learn.” With the help of this process, you can reset the positional information in the memory of your car’s PCM memory and replace it with the information from the new crankshaft sensor. The steps are as follows:
How do you relearn a crank on a car?
You’ll need a bi-directional scan tool to perform a crank relearn The exact procedure varies by car maker. On some vehicles, you enter the procedure on your scan tool and it wipes out the adaptive memory and starts to perform the relearn by itself.
What is a crankshaft relearn?
A crank relearn is a process that the PCM goes through to recalibrate its knowledge of the relationship between the crankshaft and camshaft. That’s necessary because the crank and cam are connected by a timing chain or timing belt.
How do you manually relearn a crankshaft position sensor?
0:051:00Crankshaft Position Sensor Replacement & Relearn | Snap-onYouTubeStart of suggested clipEnd of suggested clipBack on the scanner screen select crank pattern. Clear select continue once crank pattern clear isMoreBack on the scanner screen select crank pattern. Clear select continue once crank pattern clear is complete select crank pattern. Learning select continue the relearn is complete.
How do you do a crankshaft variation relearn?
Slowly accelerate the engine to 4000 RPM (or indicated RPM for your vehicle). Hold RPM until engine speed drops back toward idle. Release throttle immediately once procedure is learned! Once the variation values are learned, the ECC will return engine control to the driver.
What happens if you don't relearn crankshaft position sensor?
It is recommended to relearn the crankshaft position sensor whenever it is replaced. If you don't relearn the crankshaft position sensor, the ECU may not know the exact position of the crankshaft. This can cause a host of problems, including the engine not starting, the engine stalling, the engine will run rough.
How do you perform a relearn?
3:045:31P0335 Crankshaft Position Sensor Relearn procedure with ... - YouTubeYouTubeStart of suggested clipEnd of suggested clipCut release the accelerator pedal. So it's just one quick throttle turn the ignition switch off I'mMoreCut release the accelerator pedal. So it's just one quick throttle turn the ignition switch off I'm gonna turn that off right now.
Will disconnecting battery reset crankshaft sensor?
To reset the check engine light you can disconnect the battery via the negative battery terminal and let the vehicle sit for an hour before reconnecting the battery. This will drain all of the power from the electronics and clear any short term memory.
How do you fix crankshaft position system variation not learned?
The most common repairs to address the P0315 code are as follows:Repair or replace wiring harness around crankshaft position sensor.Repair or replace crankshaft position sensor.Repair or replace crankshaft or related components.Repair or replace timing belt.Repair or replace powertrain control module.
How do I relearn a crank sensor without a scanner?
Turn off all of the accessories. ... Accelerate the vehicle to 55 mph at part throttle. ... Cruise at 55 mph for another 5-6 minutes.Decelerate to 45 mph without using the brakes, and maintain 45 mph for 1 minute.Perform 4 deceleration cycles, without using the brakes, of 25 seconds each where no specific speed is necessary.More items...•
How do you adjust a crankshaft position sensor?
1:536:10Crankshaft Position Sensor Install - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo you'll see that i can rotate the engine counter clockwise from this position. But when i rotateMoreSo you'll see that i can rotate the engine counter clockwise from this position. But when i rotate it clockwise. It's actually going to hit that peg. And stop any further rotation.
What are the symptoms of a failed crankshaft position sensor?
Common signs of a faulty crankshaft position sensor include issues starting the vehicle, intermittent stalling, and the Check Engine Light coming on.
What is a relearn procedure on a car?
Most people have probably never heard of a TPMS 'relearn' until their auto service pro tells them they have to pay for one. A relearn refers to the process of electronically pairing a new TPMS sensor to the vehicle's Tire Pressure Monitoring System.
What is a relearn tool?
Relearning. Relearning tools are used to locate new sensors. The Engine Control Unit (ECU) needs to know the location of the sensors if you have new ones installed or if you've installed new tires. Relearning tools also activate the sensors if they are in sleep mode.
How do you reset a camshaft position sensor?
Unfortunately, there's no way to reset a camshaft position sensor. If you're having camshaft issues (check engine light on, acceleration trouble, sputtering and stalling, etc.), you'll have to replace the part entirely.
How do I relearn a crank sensor without a scanner?
Turn off all of the accessories. ... Accelerate the vehicle to 55 mph at part throttle. ... Cruise at 55 mph for another 5-6 minutes.Decelerate to 45 mph without using the brakes, and maintain 45 mph for 1 minute.Perform 4 deceleration cycles, without using the brakes, of 25 seconds each where no specific speed is necessary.More items...•
Do you have to relearn a camshaft position sensor?
Camshaft and crankshaft position sensor replacement is often necessary on many cars due to the common results of heat and vibration. However, if the proper relearn process is not performed to account for mechanical wear and manufacturing tolerances when replaced, you may face unnecessary comebacks and complaints.
How do you reprogram a camshaft position sensor?
Unfortunately, there's no way to reset a camshaft position sensor. If you're having camshaft issues (check engine light on, acceleration trouble, sputtering and stalling, etc.), you'll have to replace the part entirely.
What is a case relearn on a GM?
A CASE relearn is a Crank Angle Sensor Error relearn, which realigns the position between the crankshaft position sensor and the camshaft position sensor. This relationship helps the vehicle determine advanced misfires.
What tool do you need to crank relearn?
You’ll need a bi-directional scan tool to perform a crank relearn
Why is it necessary to have a timing belt on a crankshaft?
That’s necessary because the crank and cam are connected by a timing chain or timing belt. Over time, the timing chain/belt can stretch and that stretch changes the relationship and timing between the crankshaft and camshaft.
What to do if you see a P0300?
When you see a P0300- car makers are now recommending a crank relearn before diagnosing a P0300 condition. They want you to eliminate the possibility of a timing chain stretch as the cause of the random misfire BEFORE you start digging into other possibilities.
Is the relearn procedure the same as the carmaker?
Carmakers refer to this relearn procedure using different terminology, but it’s all pretty much the same thing.
Does crank relearn fix timing chain?
Performing a crank relearn doesn’t fix the timing chain/belt stretch, but it does allow the PCM to learn about the stretch that’s occurred since the car was manufactured and adjust its valve timing commands.
Why is it important to release throttle when engine RPM starts to decrease?
That’s the variation learn fuel cutoff RPM (depending upon the engine), and that it’s 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.
What is the code for powertrain trouble?
If there is any power train trouble code other than P1336 (Crankshaft Position Variation not learned), the computer may disable the relearn function until the problem that caused the code has been eliminated.
How long to idle a car with the clutch depressed?
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.
What temperature should the coolant be on a car?
Make sure that the hood is closed. Start the engine and make sure that the engine coolant temperature is at least 158 degrees F. (70 degrees C.)
What is the job of crankshaft?
As you know, the prime task of your engine’s crankshaft is to convert linear energy into rotational energy that gives power to the wheels of the car. Unless that happens, the car wheels aren’t going to move one inch towards your destination.
When Should You Reset A Crankshaft Position Sensor?
In fact, you should reset the crankshaft position after the replacement, whether you are getting trouble codes or not.
Why is crankshaft sensor important?
Here, the crankshaft sensor helps to identify the spinning rate for the Engine Control Module. As a result, your engine can produce the right power only when the sensor is in harmony. So resetting it after you have replaced it, to make it work in sync is the right way to do it!
Why is it important to reset your car's check engine light?
The importance is that any misfire will go undetected by the car computer. Resetting and relearning the system will help you misfires and trigger the check engine light or other indications which is very important for safe and secure, hassle-free riding in the future!
Does a car computer read the crank?
Yes, but there’s a catch. This magnetic sensor reads the pickup from the crank in each of its rotations. Your car computer takes this data in and compares it simultaneously with the database information to ensure that they both are in sync.