No. 234-22

Service
Technical Information
234/22 ENU WNS8
3
WNS8 - Re-Programming All-Wheel Drive Control Unit (Workshop Campaign)
Important:
CRITICAL WARNING -This campaign includes steps where control unit(s) in the vehicle will be
programmed with the PIWIS Tester. The vehicle voltage must be maintained between 13.5 volts and 14.5
volts during this programming. Failure to maintain this voltage could result in damaged control unit(s).
Damage caused by inadequate voltage during programming is not a warrantable defect. The technician
must verify the actual vehicle voltage in the PIWIS Tester before starting the campaign and also document
the actual voltage on the repair order.
Model Year:
As of 2022 up to 2023
Model Line:
Macan (95B)
Concerns:
All-wheel drive control unit
Cause:
The drive shaft protection function in the all-wheel drive control unit was adapted to software in
the affected vehicles in order to optimize driving dynamics.
As a result, a higher torque is available if the steering angle is large. In certain driving states (when
parking or cornering), the customer may perceive increased axial forces on the drive shaft as a clicking
noise in the front axle.
Action required: Re-program the all-wheel drive control unit with the latest PIWIS Tester software version.
Minimum requirement: Version 41.400.060
Before performing the campaign please determine if the SW version is at or above the
campaign target software value by checking the extended identifications of the All-wheel drive
control unit. If the software level of the All-wheel drive control unit is AT OR ABOVE the software
in the table below, performing the campaign is NOT necessary. If the vehicle is already at the
target SW version, please send a Warranty/Campaigns PRMS ticket to Mitchell Grasser to
have the campaign removed from this vehicle.
Model
Control unit
Target SW Level
Target Porsche part number
Macan, Macan T, Macan S,
Macan GTS
Affected
Vehicles:
All-wheel drive
0900
95B927755GF
Only vehicles assigned to the campaign (see also PCSS Vehicle Information).
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Dec 19, 2022
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Service
Technical Information
ENU 234/22
WNS8
Required tools
Tool:
9900 - PIWIS Tester 3
Battery charger with a current rating of at least 90 A, e.g. VAS 5908 90A battery charger
•
•
Re-program all-wheel drive control unit
1
The basic procedure for control unit programming is described in the Workshop Manual 
Workshop Manual 'Basic Instructions and Procedure for the Control Unit Programming Using the
PIWIS Tester'.
For specific information on control unit programming during this campaign, see table
below.
Required PIWIS Tester software version:
41.400.060 (or higher)
Type of control unit programming:
Control unit programming using the 'Automatic
programming' function for the all-wheel drive
control unit:
‘All-wheel drive’ control unit – ‘Coding
/ programming’ menu – ‘Automatic
programming’ function.
Programming sequence:
Read and follow the information and instructions
on the PIWIS Tester during the guided
programming sequence.
As part of the programming sequence, the DME
control unit, the PDK control unit, and the
all-wheel drive control unit are reprogrammed
first.
Both control units are then automatically
re-coded.
Do not interrupt programming and coding.
Once the control units have been programmed and
coded, you will be prompted to switch the ignition
off and then back on again after a certain waiting
time.
Backup documentation of the new software
versions is then performed.
Programming time (approx.):
Dec 19, 2022
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12 minutes
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Service
Technical Information
234/22 ENU WNS8
3
Software version programmed in this campaign:
0900
Procedure in the event of a termination of
control unit programming:
• Switch ignition off and then on again.
• Read out and delete the fault memories 
Workshop Manual '9X00IN Basic instructions and
procedure for control unit programming using the
PIWIS Tester - “Rework” section'.
• Repeat control unit programming by restarting
programming.
Procedure in the event of error messages
appearing during the programming sequence:
 Workshop Manual '9X00IN Basic instructions
Procedure in the event of a termination of
control unit programming:
Repeat control unit programming by restarting
programming.
and procedure for control unit programming using
the PIWIS Tester'.
2
Select the DME control unit in the Overview.
3
Select Maintenance/repairs. Press •F12“ to continue.
4
Select Adaptations. Press •F12“ to continue.
All functions listed under Adaptations must be individually selected and adapted.
5
Function selected. Press •F12“ to continue.
6
Adapt function. Press •F8“ to start.
6.1
Perform adaptation according to menu guidance. End adaptation with •F8“.
7
Select the next function. Perform adaptation (for instructions, see above).
8
Read out all fault memories, process and delete existing faults if necessary.
Information
If control units are found to have faults that are not caused by control unit programming, these
must first be found and corrected. This work cannot be invoiced under the workshop campaign
number.
AfterSales
Dec 19, 2022
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Service
Technical Information
ENU 234/22
WNS8
Information
The wheel electronics must be taught during the test drive and must not be carried out by the technician.
According to the core service process, this is the task of the customer service advisor or workshop
manager.
9
Exit the diagnostic application. Switch off ignition. Disconnect the Tester from the vehicle.
10 Switch off and disconnect the battery charger.
11 Enter the campaign in the Warranty and Maintenance booklet.
Warranty processing
Information
The specified working times were determined specifically for carrying out this campaign and include all
required preliminary and subsequent work.
The working times may differ from the working times published in the Labor Operation List in PIWIS.
Scope 1:
Re-program all-wheel drive control unit
Labor time:
Re-program all-wheel drive control unit
Includes:
Connecting and disconnecting battery charger
Connecting and disconnecting PIWIS Tester
Reading out and deleting fault memories
Labor time: 57 TU
 Damage code WNS8 066 000 1
Important Notice: Technical Bulletins issued by Porsche Cars North America, Inc. are intended only for use by professional automotive technicians who have attended Porsche service training
courses. They are written to inform those technicians of conditions that may occur on some Porsche vehicles, or to provide information that could assist in the proper servicing of a vehicle. Porsche special
tools may be necessary in order to perform certain operations identified in these bulletins. Use of tools and procedures other than those Porsche recommends in these bulletins may be detrimental to the
safe operation of your vehicle, and may endanger the people working on it. Properly trained Porsche technicians have the equipment, tools, safety instructions, and know-how to do the job properly and
safely. Part numbers listed in these bulletins are for reference only. The work procedures updated electronically in the Porsche PIWIS diagnostic and testing device take precedence and, in the event of a
discrepancy, the work procedures in the PIWIS Tester are the ones that must be followed.
© 2022 Porsche Cars North America, Inc.
Dec 19, 2022
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