Welcome to mybenz | mysatisfaction !, Register here.. | Home | Directory | Events | Forum | Buy and Sell | Contact Us | Planet Mybenz  
Login
Username:

Password:


Lost Password?

Register now!
Refine Search
Main Menu
Quick Access
Who's Online
30 user(s) are online (1 user(s) are browsing Tips and Howtos)

Members: 0
Guests: 30

more...
Home > Tips and Howtos > Benz DIY Project Tips Tips and Howtos

W-140 Electronic Accelerator Pedal Emergency Runn... [Benz DIY Project Tips]
Requested and Answered by Buckrey on 28-Jun-2005 04:23 (3132 reads)
W-140 Electronic Accelerator Pedal Emergency Running Function- by Greg Baxter
Excellent DIY tips from Greg Baxter , complete with diagrams.

Electronic Accelerator Pedal Emergency Running Function-

Task
Enabling safe continued running depending on the fault which occurs at the electronic accelerator.

Pedal value sensor emergency running
If a potentiometer fails, the system switches over to the second potentiometer. Throttle valve opening is limited to approx. 60 %. In addition, a dynamic limiting of the throttle valve opening rate is activated, the throttle valve opens with a time delay (EPC malfunction indicator lamp does not come on).
If the result of the plausibility check is negative or if both potentiometers are faulty, then only the idle speed is controlled (EPC malfunction indicator lamp comes on).

Actuator emergency running - electric
If a potentiometer fails, the system switches over to the second intact potentiometer. The air mass value of the fuel injection system is used as an additional comparative parameter. Following d plausibility check, the throttle valve opening is limited in line with engine speed and load to approx. 60 % (EPC malfunction indicator lamp does not come on).

If the result of the plausibility check is negative or if both potentiometers are faulty, the throttle valve adopts a mechanical emergency running position which is fixed by means of the spring capsule in the actuator (EPC malfunction indicator lamp comes on).

Click here for the full content

20 Comment(s) Print Q&A Send Q&A Submit answer

The comments are owned by the poster. We aren't responsible for their content.