5 Series E60 520d (N47) SAL
Aid to Diagnosing the Steering System
Ask the customer for a clear description of the complaint and any other information connected with it, e.g. particular
conditions under which the problem arises:
Inquire about the complaint and its circumstances
Vehicle/engine and ambient temperature cold/hot?
Vehicle standing still/rolling/being driven?
* Brakes actuated?
* When steering into/out of curve?
* Steering angle large/small?
* Engine speed?
* Steering lock?
Is wheel/tyre size approved?
* Is tyre pressure correct?
* Are tyres OK?
Is steering wheel approved?
Is steering system filled with approved fluid?
Depending upon type and equipment level: ATF (red)
Pentosin CHF 7.1, Pentosin CHF 11 S (both green)
Look at label on the reservoir
Take vehicle for test run
Reproduce the complaints as described by the customer.
* Get the customer to demonstrate the complaints.
With the vehicle standing still and the engine idling, turn the steering wheel slowly from lock to lock.
Does the complaint only apply to steering to one side or to both sides?
(One-sided occurrence of the problem means there is no fault with the pump.)
Can the fault also be reproduced without power assistance (engine off)?
* Vehicle standing/rolling?
Overview of Complaints
Power-assisted rack and pinion steering (ZHL):
Steering stiff or forces varying when steering into or out of curve (parking)
see page 3/20.
Steering force fluctuations (steering-force assistance fluctuating) while driving
see page 5/20.
Rotary oscillation of steering wheel while driving
see page 6/20.
Poor directional stability (straight-ahead tracking), vehicle swimming
see page 7/20.
Sporadic failure of steering power assistance, steering sticking
see page 8/20.
Noises from steering while driving straight ahead (without moving steering)
see page 9/20.
SI Aid to Diagnosing the Steering System
BMW AG - TIS
Issue status (12/2007) Valid only until next DVD is issued
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