2056407/2

Technical Service Bulletin
Topic
Market area
Brand
Transaction No.
Level
Status
Release date
Running gear - Noise identification
Bentley: worldwide (2WBE),Hongkong-Macau (5HK)
Bentley
2056407/2
EH
Released for publishing
Dec 16, 2019
New customer code
Object of complaint
chassis -> level control system, pitch and roll compensation
chassis -> steering
chassis -> steering, steering assist
chassis -> damping\suspension regulation
Complaint type Position
noises, vibrations
noises, vibrations
noises, vibrations
noises, vibrations
Vehicle data
All Models
Sales types
Type
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MY
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
Brand Designation Engine code Gearbox code
E
*
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E
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E
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*
E
*
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E
*
*
E
*
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E
*
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E
*
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E
*
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E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
Documents
Document name
master.xml
runninggear1.docx
suspension.xlsx
Final drive code
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Technical Service Bulletin
Running gear - Noise identification
Transaction No.: 2056407/2
Release date: Dec 16, 2019
Condition
Customer statement:
Noise complaint from the suspension and/or steering
Workshop findings:
The noise can be reproduced and clearly assigned to the suspension system from either of the axles
And/or
The noise can be reproduced and clearly assigned to the steering system
Prior to starting the instructions within this TPI, the Retailer must check and confirm the vehicle is in standard factory condition and has not had
any non-approved aftermarket modifications conducted including the modification of the engine control modules (chip tuning) Check the history
of the vehicle to confirm
Should any aftermarket modifications be found, the Retailer must make Product Support aware by raising a DISS query to report the details of
the modification, you must then await feedback from Product Support before conducting any further work
Technical Background
It is the retailers responsibility to check and confirm if any TPI’s are applicable to the customers complaint/issue, should an
applicable TPI be available, apply it and complete a DISS complaint to include ‘Workshop findings’ only (No repair query
required)
For correct diagnosis and repair, the attached Flowchart must be followed in conjunction with the Measure section of this TPI
Production Solution
Not applicable
Service
1) Carry out a visual inspection of the suspension and/or steering components to confirm if the noise can be attributed to a faulty component for
example:
•
Damage to the underside of the vehicle
•
Accident damage
•
Damaged or incorrect specification road wheels
•
Worn/leaking suspension components and/or steering components
•
Loose and/or damaged components
If the noise is NOT a result of one of the afore mentioned issues, carry out the remaining instructions from Step 2
2) In the event an impact noise is present for example clonking, clicking, ticking, and the operative CAN NOT locate the issue by conducting a
visual inspection you must capture/record the noise.
•
Should the noise be frequency related for example a constant drone or humming noise a frequency recording will be required
•
Refer to the onward instructions depending on which type of noise is evident (Impact or frequency related)
IMPORTANT: For frequency analysis and noise recording we recommend using the Chassis Ear Tool WT 10437
Record the noise and measure the frequency using WT 10437 Chassis Ear Tool - Follow the instructions within this TPI in
conjunction with the WT 10437 user instructions
3) Referring to Figure 1 - Using the sensor clamp/s (Point A) and Bluetooth module/s (Point B) provided in the kit - Record the noise
Figure 1
TIP: In order to locate the noise it could be necessary to use multiple clamp and module assemblies, the operative must refer to the appropriate
user instructions
NOTE: If the noise is only evident during a road test, the clamp and module assembly must be positioned outside of the cabin for the best results,
please be aware that recordings from outside of the vehicle may not help identify the issue at higher speeds or noisy geographical locations,
therefore a recording from inside the cabin will also be required
WARNING
IMPORTANT: The driver's concentration MUST be focused on the road at ALL times the assistance of a second technician is
required
WARNING
Observe all road safety procedures and speed limits.
TIP: To capture the frequency - Select ‘FFT Graph’ as Wave Form Type (Figure 2) and read the peak achieved during the recording as
highlighted in Figure 2 (in this EXAMPLE the frequency is 2000Hz)
Figure 2
4) Once recorded - Save the file to your device.
NOTE: The sound recording/video can also be taken from a mobile telephone as long as the noise is clearly identifiable
TIP: If the noise cannot be reproduced a customer recording of the noise would also be acceptable.
Should there be no applicable TPI’s, and you are not able to identify the source of the noise by using WT 10437, proceed to Step 5
5) Raise a DISS technical query – The running gear questionnaire (attached Excel spreadsheet) and the sound/video recording must be
attached to the open DISS query
VERY IMPORTANT: NOISE RELATED DISS QUERIES SHOULD NOT BE SUBMITTED WITHOUT AT LEAST TWO
ATTACHMENTS (QUESTIONAIRE AND SOUND RECORDING), SHOULD THE REQUIRED INFORMATION NOT BE INCLUDED,
THE QUERY WILL BE RETURNED TO THE RETAILER
Warranty
Warranty claims about noise complaints suspension and/or steering system are only possible with a completed running gear
questionnaire, an audio/video recording and an eligible DISS query