2056407/3

Technical product information
Topic
Market area
Brand
Transaction No.
Level
Status
Release date
Running gear - Noise identification
Bentley: worldwide (2WBE),Hongkong-Macau (5HK)
Bentley
2056407/3
EH
Approval
New customer code
Object of complaint
Complaint type Position
running gear -> adaptive suspension, pitch and roll compensation
running gear -> steering system
running gear -> steering, power-assisted steering
running gear -> shock absorber/suspension control
noise, vibration
noise, vibration
noise, vibration
noise, vibration
Vehicle data
All Models
Sales types
Type MY Brand Designation Engine code Gearbox code Final drive code
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2022
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Documents
Document name
master.xml
runninggear1.docx
suspension.xlsx
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Technical product information
Running gear - Noise identification
Transaction No.: 2056407/3
Customer statement / workshop findings
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 change
Not applicable
Measure
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
Additional ‘contextual’ video/audio recordings from a customer perspective should also be used
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 IMPORTANT: The following detail MUST also be included:
•
Vehicle speed
•
With or without steering lock applied (please confirm)
•
Ambient conditions
•
Engine coolant temperature when issue is evident
•
What does the driver/customer do to induce the problem?
•
Any reported disassembly and/or issues of the rear axle area
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 accounting instructions
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
Noise complaint from Running gear
(Suspension/Steering systems)
Visual check of the suspension/steering systems as
per Technical Background section of the TPI
Not OK
OK
Follow standard repair
procedures then retest for
noise
Noise rectified
OK
Use WT 10437 to create sound recording and
record frequency (If frequency related)
TPI available?
No
Raise a DISS technical query
Attach the completed ‘Running gear noise
questionnaire’
Attach the sound/video recording
Yes
Issue still present?
OK
Repair as per TPI
then retest
Is noise
rectified?
No
Yes
Vehicle is fixed
Questionaire Suspension system - NVH complaint
Vehicle information:
VIN:
Road test:
yes
carried out:
Noise type:
chattering
forward
hissing
judder
squealing
moaning
chirping
knocking
creaking
clonk
clicking
popping
rattle
humming
crunching
roaring
banging
dronning
groaning
ticking
buzzing
whirring
gurgling
whistling
RH
Rear axle
brake applied
without steering input
with steering input
backwards
without steering input
brake applied
straight line
curve
with steering input
static with steering input
Right
Where does the noise occur:
always
often
rare
uneven road
pot holes
speed bump
Left
Highway
0-30 mph
30-60 mph
over 60 mph
speed not dependent
Description:
LH
Frequency:
kHz
Noise occurs only once on the same direction (repeatable moving back and forth):
yes
no
State of suspension components: bush/ball joints/mounts:
leaking
damaged
Okay
wear
free play
Vehicle Temperature
cold
Weather:
Cracks
Outside temperature:
15
warm
wet
dry
snow
Humidity
C°
20
to
High
Low
Customer Driving profile:
short haul
Long haul
sporty
normal
Further information:
(if necessary)
Previous Attempted Repeairs (DISS if available):
Comparable Vehicle tested on same conditions:
Comments
yes
no
When does the noise occur:
grinding
Front axle
yes
Complaint understandable:
no
VIN:
C°