Simultaneous Operation of Accelerator and Brake Pedals

Simultaneous Operation Of Accelerator And Brake Pedals

This test module serves to detect whether the accelerator pedal mechanically jams or is otherwise difficult to move. This is determined by simultaneously operating the accelerator and brake pedals while the vehicle is being driven.

The fault is set in the engine management system if a driver's demand is detected via the accelerator pedal for at least 1.5 seconds and in relation to this there is a brake signal. Here, the brake pressure is used as a measured variable. This prevents braking deceleration being stopped by a jamming accelerator pedal.

Effect:
As long as the driver's demand and brake pressure are present, the vehicle does as follows:

The engine management system reduces the driver's demand relative to the brake pressure. If the brake pressure increases, the driver's demand is taken back accordingly by the engine management system.

Perceivable effects: like taking foot off accelerator pedal

Possible customer complaint:
- Inertia fuel shutoff while driving
- Loss of power output
- Increased, constant engine speed and/or mechanical snagging of accelerator pedal

Requirements of the vehicle for setting the fault:
Speed ≥ 8 kph

No fault entries in the engine management system for the following component groups:
- Accelerator pedal module
- Brake light switch

Procedure:
The accelerator pedal module may only be replaced if there is an express customer complaint regarding increased, constant idle speed and / or a mechanically jamming accelerator pedal as well as the fault entry.

The fault entry alone does not require component replacement!

In the case of a multiple fault entry, the customer is to be informed of his or her possible incorrect operation (simultaneously operating the accelerator and brake pedals).