General Information: Notes

2011 BMW 740iSECTION Notes

When driven vigorously or on an uneven road surface, a vehicle tends to respond with undesirable body movements. BMW first developed Vertical Dynamics Control for the E70 and was able to effectively reduce such body motion as a result.

VDC improves the following driver-perception related vehicle characteristics according to road surface conditions:

  • Body-related ride comfort (primary ride comfort)
  • Roadwheel-related ride comfort (secondary ride comfort)
  • Dynamic handling (transitional response, agility) even with more comfortable suspension setting.

BMW is the first manufacturer to offer a damper adjustment system that is continuously controllable independently of damper compression/extension as is the case with the VDC (2) on the F01/F02.

The essential improvements compared with VDC (1) are:

  • 1 EDC control valve for damper extension control
  • 1 EDC control valve for damper compression control
  • "Pre-opening adjustment" for improved body stabilization (has adjustment effect even at low damper rates)
  • Driver-perceptible broad spread in conjunction with the handling setting switch (difference between soft and hard characteristics)
  • Separately adjustable characteristic for roadwheel-related ride comfort (extension characteristic independent of compression characteristic)
Fig 1: Identifying VDC Front Dampers
G06925031Courtesy of BMW OF NORTH AMERICA, INC.
INDEX REFERENCE CHART

Index Explanation
1 Front damper, VDC 2
2 Front damper, VDC 1
VDC DAMPER REFERENCE CHART

Β  VDC 1 VDC 2
Model On E70/E71 included in Adaptive Drive Equipment package Standard equipment in F01/F02
Program selection Sport button next to gear selector Handling setting switch next to gear selector
Program type Sport/Comfort Coordinated integration in all dynamic handling control functions
Control unit VDM control module, right rear of luggage compartment
4 EDC satellite control modules directly on damper units
VDM control module, front right A-pillar
4 EDC satellite control modules directly on damper units
Damper Twin tube, gas filled shock absorbers Twin tube, gas filled shock absorbers
Fault diagnosis VDM and EDC satellite control modules fully diagnosable VDM and EDC satellite control modules fully diagnosable
Programming VDM and EDC satellite control modules flash-programmable VDM and EDC satellite control modules flash-programmable
Coding VDM and EDC satellite control modules codable VDM and EDC satellite control modules codable
Malfunction display Messages in the Control Display or instrument cluster Messages in the Control Display or instrument cluster
Testing BMW diagnostic systems BMW diagnostic systems
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