height BMW 745LI 2002 E66 Level Control System Manual

55
Level Control Systems
Workshop Hints
Ride Height Measurement
When checking vehicle ride height with EHC, measure from the lower edge of the wheel
opening to the center of the wheel hub.
Diagnosis
Diagnostic items can be found in the “Control Unit Functions” path when using the DISplus
or GT-1. The functions available are Identifcation (ID page), Read/Clear Fault Memory, Read
Test Codes, Diagnosis Requests and Component Activation.
Service Functions
In the Diagnosis Program, there are numerous Service Functions that can be performed for
the E65/E66 EHC system. By entering into the “Function Selection” program and follow-
ing the “Chassis - Pneumatic Suspension” path all of the Service Functions are listed. The
Service functions include Ride-Level Offset, Transport Mode and Band Mode.

56
Level Control Systems
Review Questions
1. The EHC control module on the E65/E66 is connected to the Bus.
2. List the operating modes that are specific to the E65/E66 Air Suspension System:
3. Why is the accumulator needed on the dual axle EHC system?
4. List the components specific to the Dual Axle EHC system:
5. Which 2 Buses system are connected to the EHC control module on the Dual Axle EHC
system?
6. What components are replaceable on the LVA?
7. What are the 3 possible ride height setting on the Dual Axle EHC system?
8. What type of sensor is used for ride height measurement?