What is crank 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.

What is the code for a bad crankshaft position sensor?

A diagnostic scan tool will show a code between P0335 and P0338. The check engine light doesn’t always come on, though, so you could be experiencing any of the above symptoms for some time before you see the warning light. There are a number of different problems that can cause similar symptoms to a crankshaft position sensor problem.

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.

Why is the position of the crankshaft so important?

The speed and position of the crankshaft are two key parameters that the car’s computer uses for engine management calculations. So, you may understand how important it is for the sensor to work without any glitch. Let’s learn about some crankshaft position sensor failure symptoms so that you can take action when there’s a problem.

How to do a crank Relearn on a computer?

To perform the relearn, proceed as follows: Connect a scanner to make sure there are no trouble codes stored in the computer’s 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.

When does the crankshaft position sensor need to be relearn?

The PCM needs to learn the variability of the Crankshaft Position Sensor to better detect misfire conditions. Whenever the PCM is replaced, the Crankshaft Position Sensor Relearn procedure needs to be completed. The Crankshaft Position Sensor Relearn procedure requires the use of a scan tool that has this feature equipped.

Is there a relearn section for cam crank?

But Cam Crank Relearn is not in this section. Does anyone know in what section it would be? relearn for a computer can be as simple as disconnecting the battery and waiting, then reconnecting. during a restart, it can seek to relearn as they always have .I am not reading a book but responding from experience.

How does the computer know the crank position?

This thing is a cam sensor,. not for spark, it gives current cam position to the computer which also knows crank position. Then the computer references it to injector pulse and deposits fuel behind the intake valve. Finding that page,reference in the book would be difficult.