E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > Tuning & Tech > DIY: Do It Yourself

DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 12-07-2014, 01:42 AM   #1
mrpinstripsuits
Registered User
 
Join Date: May 2005
Location: UCLA/Bay Area
Posts: 47
My Ride: carbon black e46 m3
DIY: E46 M3 Crank shaft position speed sensor

Greetings:

If you're getting the following codes, and your car is having starting problems and rough idle, then it is time to replace the crank shaft position speed sensor:


"The crankshaft sensor outputs the engine speed in the form of a square-wave signal.
If the crankshaft position/rpm sensor is faulty, a corresponding fault code "crankshaft position/rpm sensor" is stored in the fault code memory of the engine control unit. The camshaft sensor signal is then used as the engine speed signal (emergency operation).
Possible effect: Misfiring and poor starting characteristics
It is located in the rear of engine left side under intake pipe connected to a 3-pin black connector.
During cases where the crankshaft sensor is faulty, the camshaft sensor signal is used in-place of the crankshaft sensor signal. That's the reason why you're still able to start the engine. If both are inoperative you'll be up the sh__creek.
failed crankshaft position sensor would cause the DME to not know the position of the pistons/crankshaft, it would not know when to fire the injectors or ignition." -collected quotes from these forums.




This DIY will take around an hour.

These are the tools you will need to remove the crank shaft position speed sensor:

Size 5mm allen hex key. You can use either of the first two tools pictured: allen key hand wrench or small sized ratchet with bendable neck (last socket wrench used for size comparison).

Remove the air intake arm and the filter:



Stick your arm through the clearing:



Shine light down this area.


This is the sensor.






After you undo the 5mm allen hex bolt, then wear some sturdy gloves, and yank out the sensor. Replace the sensor with the new sensor.

Afterwards, you will have to go underneath the car in order to unplug the old sensor from the wiring harness, then you can plug the new sensor into the wiring harness.




Jack up car, so you can unplug the other end of the sensor from the electrical harness and also plug in the new sensor:





Plug the other end of the crank shaft position speed sensor into the green harness.

Here is the comparison of the old and new crank shaft position speed sensors:


You can get the sensor from here:
http://www.ecstuning.com/BMW-E46-M3-...Shaft/ES29129/

All the best.

-M-
__________________

Last edited by mrpinstripsuits; 12-07-2014 at 02:25 AM.
mrpinstripsuits is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Censor is ON





All times are GMT -5. The time now is 01:54 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2015, vBulletin Solutions, Inc.
(c) 1999 - 2011 performanceIX Inc - privacy policy - terms of use