Parts Catalog Accessories Catalog Tech Info Tech Forums
 
Follow Pelican Parts on Facebook Follow Pelican Parts on Twitter Follow Pelican Parts on Instagram Follow Pelican Parts on YouTube Follow Pelican Parts on Pinterest Follow Pelican Parts on Tumblr
  Search our site:    
View Recent Cars  |   Cart  | Project List | Order Status | Help    
 >  >
Accelerator Pedal Sensor Replacement
 
Bookmark and Share

Pelican Technical Article:

Accelerator Pedal Sensor Replacement

Nick Czerula

Time:

1 hours1 hrs

Tab:

$300

Talent:

***

Tools:

4mm Allen, flathead screwdriver

Applicable Models:

BMW Z4 Convertible (2003-06)
BMW Z4 Coupe (2006)

Parts Required:

Accelerator pedal sensor

Hot Tip:

Clear fault codes when done

Performance Gain:

Remedy fault codes and restore engine performance

Complementary Modification:

Replace air filter

The digital motor electronics (DME) engine management system in BMW Z4 vehicles with S54 6-cylinder engine is designed with a drive-by-wire throttle. There is no throttle cable connecting the accelerator pedal to the throttle housing. Instead, potentiometers in the accelerator pedal module (PWG) communicate pedal position directly to the engine control module (ECM). Two separate signals, one signaling pedal position and the other indicating rate of pedal movement, communicate driver demand on the system.

Based on pedal position and movement, the ECM communicates throttle opening to the throttle bodies at the intake manifold via the EDR. As mentioned, two separate signals, one signaling pedal position and the other indicating rate of pedal movement, communicate driver demand on the system. The signals from the sensor vary in voltage and differ in signal type, one signal is digital and one is analog.

Before you condemn your throttle housing or accelerator pedal sensor, be sure to inspect all the intake air ducts and hoses. They should be well sealed and free from cracks or tears. Check the function of your crankcase breather valve and inspect all breather hoses. If a breather hose cracks or fails, the air leak can cause a rough idle or engine stalling. You may have to remove the throttle housing when servicing other components; if you do, be sure to replace the sealing gasket.

In this article, I'll go over the steps involved with replacing the accelerator pedal sensor on BMW Z4 models.

Keep in mind that when your car was serviced before, parts may have been replaced with different size fasteners used in the replacement. The sizes of the nuts and bolts we give may be different from what you have, so be prepared with different size sockets and wrenches.

Protect your eyes, hands and body from fluids, dust and debris while working on your vehicle. If working with the electrical system, disconnect the battery before beginning. Always catch fluids in appropriate containers and properly dispose of any fluid waste. Recycle parts, packaging and fluids when possible. Do not work on your vehicle if you feel the task is beyond your ability.

Vehicle models change and evolve as they grow older, so the vehicle shown in our illustrations may vary slightly from yours. If something seems different, let us know and share your info to help other users. Questions or want to add to the article? Leave a comment below. When leaving a comment, please leave your vehicle information.

The digital motor electronics (DME) engine management system in BMW Z4 vehicles is designed with a drive-by-wire throttle.
Figure 1

The digital motor electronics (DME) engine management system in BMW Z4 vehicles is designed with a drive-by-wire throttle. There is no throttle cable connecting the accelerator pedal to the throttle housing. Instead, potentiometers in the accelerator pedal sensor (blue arrow) communicate pedal position directly to the engine control module (ECM). Two separate signals, one signaling pedal position and the other indicating rate of pedal movement, communicate driver demand on the system. The signals from the sensor vary in voltage and differ in signal type, one signal is digital and one is analog.

Working at the base of the pedal, pry out the small plastic plug (red arrows).
Figure 2

Working at the base of the pedal, pry out the small plastic plug (red arrows).

Then, remove the 4mm Allen fastener from the pedal assembly (red arrow).
Figure 3

Then, remove the 4mm Allen fastener from the pedal assembly (red arrow).

Push the pedal assembly up (red arrow) to detach it from the floor of the vehicle.
Figure 4

Push the pedal assembly up (red arrow) to detach it from the floor of the vehicle.

Working at the sensor, disconnect the electrical connector (blue arrow) by pressing the release tabs (located at narrow sides of connector) and pulling it off.
Figure 5

Working at the sensor, disconnect the electrical connector (blue arrow) by pressing the release tabs (located at narrow sides of connector) and pulling it off. Remove the sensor from the vehicle. After the replacing the accelerator pedal sensor, allow the engine to idle for a couple of minutes before driving. This is to allow the system to adapt the new sensor to compensate for any differences between the components. If this is not carried out there will be a dead point in the sensor.

When installing, be sure to align the slot in the pedal assembly (blue arrow) with the tab (red arrow) on the body of the vehicle.
Figure 6

When installing, be sure to align the slot in the pedal assembly (blue arrow) with the tab (red arrow) on the body of the vehicle.

Bookmark and Share

  Search our site:    

View Cart & CheckOut | Project List | Order Status |  Help    

 

[Home] [Customer Service] [Shopping Cart] [Privacy Statement]
 [Contact Us] [About Us] [Shipping] [Map to our Location] [Careers]

Copyright © Pelican Parts Inc.

Page last updated: Sun 12/11/2016 02:58:28 AM