No. 38-22

Service
Technical Information
38/22
ENU
WNB5
5
WNB5 - Re-coding Door Control Unit on Front Passenger's Side (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 2020 up to 2022
Model Line:
Cayenne (9YA/9YB)
Panamera (971)
Concerns:
Door control unit on passenger's side, front
Information:
The control unit is held in standby mode due to an internal fault in the door control unit on the
passenger's side (front door).
As a result there will be an increased closed-circuit current load and the 12 V vehicle electrical system
battery will become discharged while the vehicle is parked up.
Action required: Re-program the door control unit on the passenger side at the front using the PIWIS Tester with the
software version 40.800.020 (or higher) installed.
Affected
Vehicles:
Only vehicles assigned to the campaign (see also PCSS Vehicle Information)
Required tools
Tool:
•
•
Battery charger with a current rating of at least 90 A and a current and voltage-controlled
charge map for lithium starter batteries, e.g. VAS 5908 - battery charger 90 A
9900 - PIWIS Tester 3
Re-coding door control unit on front passenger's side
Work Procedure: 1
Re-coding door control unit on front passenger's side.
The basic procedure for control unit programming is described in the Workshop Manual 
Workshop Manual 'Basic instructions and procedure for control unit programming using the PIWIS
Tester'.
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Technical Information
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For specific information on control unit coding during this campaign, see the table
below:
Required PIWIS Tester software version:
40.800.020 (or higher)
Type of control unit coding:
Control unit coding using the 'Automatic coding'
function for the control unit:
Control unit ‘passenger side door’ – ‘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
Select Maintenance/repairs.
3
Standardization run must now be selected. Press •F12“ to continue.
4
3.1
Read and follow the instructions and information on the Tester.
3.2
Perform standardization run according to menu guidance.
Enter the campaign in the Guarantee and Maintenance booklet.
Re-coding door control unit on front passenger's side
Work Procedure: 1
Re-coding door control unit on front passenger's side.
The basic procedure for control unit programming 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 software version:
40.800.020 (or higher)
Type of control unit coding:
Control unit coding using the 'Automatic coding'
function for the control unit:
Control unit ‘passenger side door’ – ‘Coding
/ Programming’ menu – ‘Automatic coding’
function.
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AfterSales
Service
Technical Information
38/22
ENU
WNB5
5
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
Select Maintenance/repairs.
3
Standardization run must now be selected. Press •F12“ to continue.
4
3.1
Read and follow the instructions and information on the Tester.
3.2
Perform standardization run according to menu guidance.
Enter the campaign in the Guarantee and Maintenance booklet.
Warranty processing
Scope 1:
Labor time:
Re-coding door control unit on front passenger's side
Includes:
Connecting and disconnecting battery charger
Connecting and disconnecting PIWIS Tester
Labor time: 26 TU
 Damage code WNB5 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
Apr 1, 2022
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