No. 4-22

Service
Technical Information
4/22
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WNA1
2
WNA1 - Re-Programming of the DME 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:
2019
Vehicle Type:
911 Speedster (991)
911 GT3RS (991)
Concerns:
DME control unit
Information:
Internal function tests have shown that the functionality of the oxygen sensor will not be
consistently met over time, particularly at higher mileages or due to high thermal loads during
racetrack use.
Under certain conditions, this can cause an error message "Engine control fault" to be displayed in the
instrument cluster and the Check Engine light will be activated. Compliance with the emission limits is
ensured at all times.
Action required: Re-program the DME control unit using the PIWIS Tester with software version 40.775.060 (or higher)
installed.
Affected
Vehicles:
Only the vehicles assigned to the campaign (see also PIWIS Vehicle information).
Required tools
Tool:
•
•
9900 - PIWIS Tester 3 with PIWIS Tester software version 40.775.060 (or higher) installed
Battery charger with a current rating of at least 90 A, e.g. VAS 5908 battery charger 90A
Re-Programming of the DME Control Unit - Scope 1
Work procedure: 1
Re-program DME control unit.
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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For specific information on control unit programming during this campaign, see table
below.
Required PIWIS Tester software version:
40.775.060 (or higher)
Type of control unit programming:
Control unit programming using the 'Automatic
programming' function for the DME control unit:
'DME' control unit – 'Coding/programming' menu
– 'Automatic programming' function.
Read and follow the information and instructions
on the PIWIS Tester during the guided
programming sequence.
During the programming sequence, the DME
control unit is re-programmed first, then the PDK
control unit is reprogrammed.
Programming sequence:
Both control units are then recodedautomatically.
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.
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The programming sequence takes
(approx.):
13 minutes
Software version programmed during this
campaign:
See  Technical Information 'Software overview'
section.
Procedure in the event of abnormal
termination of control unit programming:
• Switch ignition off and then on again.
• Read out and erase the fault memory  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 other error
messages appearing during the
programming sequence:
 Workshop Manual '9X00IN Basic instructions and
procedure for control unit programming using the
PIWIS Tester - section on “Fault finding"'.
2
Select the DME control unit in the overview.
3
Select Maintenance/repairs. Press •F12“ to continue.
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4
Adaptations must be selected. Press •F12“ to continue.
5
Perform throttle valve adaptation. Press •F12“ to continue.
6
Adapt function. Press •F8“ to start.
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Perform adaptation according to menu guidance. End adaptation with •F8“.
7
Read out all fault memories, process and delete existing faults if necessary.
8
Exit the diagnostic application. Switch off ignition. Disconnect the Tester from the vehicle.
9
Switch off and disconnect the battery charger.
10 Enter the campaign in the Warranty and Maintenance booklet.
– End of action –
For warranty processing, see the Section  Technical Information '9X00IN Warranty processing'.
Re-Programming the DME Control Unit - Scope 2
Work procedure: 1
Re-program DME control unit.
The basic procedure for control unit programming is described in the Workshop Manual 
Workshop Manual '9X00IN Basic instructions and procedure for 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:
40.775.060 (or higher)
Type of control unit programming:
Control unit programming using the 'Automatic
programming' function for the DME control unit:
'DME' control unit – 'Coding/programming' menu
– 'Automatic programming' function.
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Read and follow the information and instructions
on the PIWIS Tester during the guided
programming sequence.
The DME control unit is reprogrammed during
the programming sequence.
Programming sequence:
The DME control unit is then recodedautomatically.
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.
The programming sequence takes
(approx.):
10 minutes
Software version programmed during this
campaign:
See  Technical Information '9X00IN Software
overview' section.
Procedure in the event of abnormal
termination of control unit programming:
• Switch ignition off and then on again.
• Read out and erase the fault memory  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 other error
messages appearing during the
programming sequence:
 Workshop Manual '9X00IN Basic instructions and
2
Select the DME control unit in the overview.
3
Select Maintenance/repairs. Press •F12“ to continue.
4
Adaptations must be selected. Press •F12“ to continue.
5
Perform throttle valve adaptation. Press •F12“ to continue.
6
Adapt function. Press •F8“ to start.
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procedure for control unit programming using the
PIWIS Tester - section on “Fault finding”'.
Perform adaptation according to menu guidance. End adaptation with •F8“.
Read out all fault memories, process and delete existing faults if necessary.
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8
Exit the diagnostic application. Switch off ignition. Disconnect the Tester from the vehicle.
9
Switch off and disconnect the battery charger.
2
10 Enter the campaign in the Warranty and Maintenance booklet.
– End of action –
For warranty processing, see the Section  Technical Information '9X00IN Warranty processing'.
DME Software Overview
911 (991):
Type
Model year
I-no.
Software part
number
Software version
911 Speedster
2019
4BF
9P1906033Q
0001
911 Speedster
2019
161
9P1906033R
0001
911 Speedster
2019
160
9P1906033S
0001
911 Speedster
2019
162
9P1906033T
0001
911 GT3 RS
2019
4BF
9P1906033P
0001
Warranty processing
Scope 1:
Re-Programming DME control unit
•
Only valid for vehicles with PDK (M-NO.: 250)
Working time:
Re-Programming DME control unit
Includes:
Connecting and disconnecting battery charger
Connecting and disconnecting PIWIS Tester
Performing adaptations
Reading out and erasing fault memories
Labor time: 57 TU
 Damage code WNA1 066 000 1
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Scope 2:
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Re-Programming DME control unit
•
Valid for vehicles with manual transmission (M-NO.: 486)
Working time:
Re-Programming DME control unit
Includes:
Connecting and disconnecting battery charger
Connecting and disconnecting PIWIS Tester
Performing adaptations
Reading out and erasing fault memories
Labor time: 45 TU
 Damage code WNA1 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.
Mar 10, 2022
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