Steering/Suspension - Dynamic Drive Failure
SI B37 01 05Special Suspension Systems
July 2005
Technical Service
This Service Information bulletin supersedes Service Measure B37 200 04 dated March 2004.
SUBJECT
ARS Fault Codes 5D5B or 5D5C
MODEL
E65 and E66 (7 Series) equipped with Dynamic Drive
SITUATION
Customer complains of Dynamic Drive Failure.
FAULT CODE
Faults codes 5D5B (pressure build up front axle) or 5D5C (pressure sensor rear axle) may be stored in Active Roll Stabilization (ARS) control unit.
CAUSE
Low fluid level, damaged hydraulic lines, faulty front sway bar or faulty power steering pump may cause these faults.
CORRECTION
Check the ARS fluid level and system pressure.
PROCEDURE
^ Ensure power steering fluid is at proper level.
^ Perform "start up" procedure by following Service Information B37 02 03.
^ If system pressure goes above 150 bar, then replace the front sway bar.
^ If system pressure does not go above 150 bar, then check the hydraulic supply lines for damage.
^ If hydraulic lines are not damaged, then replace the power steering pump.
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