No. 233-22

Service
Technical Information
233/22 ENU WNS7
9
WNS7 - Re-Programming Control Unit for Air-Conditioning System (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:
Air-conditioning control unit
Cause:
On the affected vehicles, due to a software error, it is possible that too low current limits are
sporadically transmitted from the air-conditioning system control unit to the air conditioning
fan, especially when using the permanent driving lights.
If this is the case, the ventilation of the vehicle interior is impaired by the air conditioning fan.
Action required: Re-program the air-conditioning system control unit with the latest PIWIS Tester software version.
Minimum requirement: Version 41.400.020
Required tools
Tool:
9900 - PIWIS Tester 3
Battery charger with a current rating of at least 90 A, e.g. VAS 5908 battery charger 90 A
•
•
Re-programming air-conditioning system 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:
41.400.020 (or higher)
Type of control unit programming:
Control unit programming using the ‘Campaign’
function in the additional menu on the PIWIS
Tester by entering a programming code.
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Dec 16, 2022
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9
Service
Technical Information
ENU 233/22
WNS7
Programming code:
F6L8S
Programming sequence:
Read and follow the information and instructions
on the PIWIS Tester during the guided
programming sequence.
Do not interrupt programming and coding.
A backup documentation process for the
re-programmed software versions starts as soon
as programming and coding is complete.
Programming time (approx.):
4 minutes
Software version programmed during this
campaign:
•
Procedure in the event of error messages
appearing during the programming sequence:
 Workshop Manual 'Basic instructions and
Procedure in the event of abnormal termination
of control unit programming:
Repeat control unit programming by restarting
programming.
Air-conditioning control unit: 0760
Following control unit programming, the software
version can be read out from the relevant control
unit in the  ‘Extended identifications’ menu using
the PIWIS Tester.
procedure for control unit programming using the
PIWIS Tester'.
2
Teach and check servo motors for air-conditioning system, unless this is already done in the
programming sequence.
3
Read out and delete the error memories of all control units.
4
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:
Dec 16, 2022
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Re-programming air-conditioning system control unit
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Service
Technical Information
Scope 1:
233/22 ENU WNS7
9
Re-programming air-conditioning system control unit
Labor time:
Re-programming air-conditioning system control unit
Includes:
Connecting and disconnecting battery charger
Connecting and disconnecting PIWIS Tester
Teaching servomotor for air-conditioning system
Reading out and deleting fault memories
Labor time: 33 TU
 Damage code WNS7 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.
AfterSales
Dec 16, 2022
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