No. 188-22

Service
Technical Information
188/22 ENU WNN9
9
WNN9 – Re-Coding Central Computer (PCM) (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:
2022
Model Line:
Macan (95B)
Concerns:
Central computer (PCM)
Information:
It is possible that there won’t be any traffic information (Real Time Traffic Information)
displayed in the navigation system on the affected vehicles due to potentially incorrect coding
of the central computer (PCM).
Action required: Re-code the central computer (PCM) using the PIWIS Tester with test software version 41.300.000 (or
higher) installed.
Affected
Vehicles:
Only vehicles assigned to the campaign (see also PCSS Vehicle Information).
Required tools
Tools:
•
•
9900 - PIWIS Tester 3 with PIWIS Tester test software version 41.300.000 (or higher) installed
Battery charger with a current rating of at least 90 A, e.g. VAS 5908 battery charger 90A
Re-coding central computer (PCM)
Work Procedure: 1
Re-code central computer (PCM).
The basic procedure for control unit coding is described in the Workshop Manual  Workshop
Manual 'Basic instructions and procedure for control unit programming using the PIWIS Tester'.
For specific information on control unit coding during this campaign, see the table below:
Required PIWIS Tester version:
41.300.000 (or higher)
AfterSales
Nov 7, 2022
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9
Service
Technical Information
ENU188/22
WNN9
Control unit coding using the ‘Automatic coding’
function for the control unit:
Type of control unit coding:
Control unit ‘PCM’ – ‘Coding / Programming’
menu – ‘Automatic coding’ function.
Read and follow the information and instructions
on the PIWIS Tester during the guided procedure.
Coding sequence:
Do not interrupt coding.
When coding is complete, the message “Coding has
been completed successfully” is displayed and a tick
appears in the ‘Status’ box.
Procedure if control unit coding is not
successful:
Repeat control unit coding.
2
Read out and delete the error memories of all control units.
3
Enter the campaign in the Warranty and Maintenance booklet.
Warranty processing
Information
The specified working time was determined specifically for carrying out this campaign and includes all
necessary preliminary and subsequent work.
The working time may differ from the working times published in the Labor Operation List in the PCSS.
Scope 1:
Re-coding central computer (PCM)
Labor time:
Re-coding central computer (PCM)
Includes:
Connecting and disconnecting battery charger
Connect and disconnect PIWIS Tester
Selecting and erasing fault memories
Labor time: 37 TU
 Damage code WNN9 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.
Nov 7, 2022
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AfterSales