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WKE8 - Re-programming DME Control Unit (Workshop Campaign)
Vehicle Type:
911 GT3 (991)
Model Year:
2018 - 2019
Subject:
DME control unit
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.
Information:
Due to a mix up in the allocation in the DME software, if there is a fault in the oxygen sensor
on one cylinder bank, the fault code for the oxygen sensor on the other cylinder bank will be
stored in the fault memory.
As a result, replacing the relevant oxygen sensor will not correct the stored fault and this may result in
repeat repairs.
Remedial
Action:
Re-program the DME control unit using the PIWIS Tester with test software version 38.300.030 (or
higher) installed.
Information
The DME control unit is re-programmed and then re-coded automatically.
For vehicles with Porsche Doppelkupplung (PDK), the PDK control unit is also re-programmed and coded
automatically.
The total time required for programming and coding is:
Affected
Vehicles:
•
Vehicles with PDK transmission (I-no. 250): approx. 15 minutes
•
Vehicles with 6-speed GT sport manual transmission (I-no. 486): approx. 8 minutes
Only the vehicles assigned to the campaign (see also PCSS Vehicle Information). This campaign affects
3,147 vehicles in North America.
Required Tools
Tools:
•
•
9900 - PIWIS Tester 3 with PIWIS Tester software version 38.300.030 (or higher) installed
Battery charger with a current rating of at least 90 A, e.g. VAS 5908 - Battery charger 90A
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Preparatory Work
NOTICE
Use of a PIWIS Tester software version that is older than the prescribed version
•
Measure is ineffective

Always use the prescribed version or a higher version of the PIWIS Tester software for control unit
programming and coding.
NOTICE
Fault entry in the fault memory and control unit programming aborted due to low-voltage.
•
Increased current draw during diagnosis or control unit programming can cause a drop in voltage, which
can result in one or more fault entries and the abnormal termination of the programming process.

Before starting control unit programming, connect a suitable battery charger with a current rating of at
least 40 A to the vehicle.
NOTICE
Control unit programming will be aborted if the WLAN connection is unstable.
•
An unstable WiFi connection can interrupt communication between the PIWIS Tester and the vehicle
communication module (VCI). As a result, control unit programming may be aborted.

During control unit programming, always connect the PIWIS Tester to the vehicle communication module
(VCI) via the USB cable.
Work Procedure: 1
Carry out general preliminary work for control unit programming as described in  Workshop
Manual '9X00IN Basic instructions and procedure for control unit programming using the PIWIS
Tester'.
Information
The procedure described here is based on the PIWIS Tester 3 software version 38.300.030.
The PIWIS Tester instructions take precedence and in the event of a discrepancy, these are the
instructions that must be followed.
A discrepancy may arise with later software versions for example.
Re-programming DME Control Unit
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'.
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For specific information on control unit programming during this campaign, see table
below.
Required PIWIS Tester software version:
38.300.030 (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 re-programmed.
Programming sequence:
Both control units are then re-coded automatically.
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.):
DME control unit: approx. 8 minutes
DME and PDK control units: approx. 15 minutes
Software version programmed during this
campaign:
See  Technical Information '9X00IN Overview of
the programmed software versions'.
Procedure in the event of abnormal
termination of control unit programming:
• Switch ignition off and then on again.
• Read out and erase fault memories  Workshop
Manual '9X00IN Basic instructions and procedure
for control unit programming using the PIWIS Tester section on "Subsequent work"'.
• 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"'.
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Overview of the programmed software versions
Information
The software version and software part number for the DME control unit that are programmed
during this campaign depend on the emission standard of the respective vehicle.
For vehicles with Porsche Doppelkupplung (PDK), the transmission is also re-programmed using a corresponding data record.
You will find an overview of the corresponding data records for the DME and PDK control units in the
following table.
Overview:
Overview:
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911 GT3 vehicles with PDK transmission (I-no. 250)
Exhaust emission
standard
Control unit
Software part no.
Software version
EU6 Plus
(I-no. 7MM)
DME
99161865617
3668
Porsche
Doppelkupplung (PDK)
99161834303
A149
EU4
(I-no. 160)
DME
99161865817
3672
Porsche
Doppelkupplung (PDK)
99161834303
A149
EU4 EOBD
(I-no. 161)
DME
99161865917
3674
Porsche
Doppelkupplung (PDK)
99161834303
A149
LEV-2
(I-no. 162)
DME
99161865717
3670
Porsche
Doppelkupplung (PDK)
99161834303
A149
911 GT3 vehicles with 6-speed GT sport manual transmission (I-no. 486)
Exhaust emission
standard
Control unit
Software part no.
Software version
EU6 Plus
(I-no. 7MM)
DME
99161869017
3669
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EU4
(I-no. 160)
DME
99161869417
3673
EU4 EOBD
(I-no. 161)
DME
99161869617
3675
LEV-2
(I-no. 162)
DME
99161869217
3671
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911 GT3 Touring vehicles (I-no. 032, 039) with 6-speed GT sport manual transmission (I-no.
486)
Exhaust emission
standard
Control unit
Software part no.
Software version
EU6 Plus
(I-no. 7MM)
DME
99161867717
3676
EU4
(I-no. 160)
DME
99161867817
3677
EU4 EOBD
(I-no. 161)
DME
99161867917
3678
LEV-2
(I-no. 162)
DME
99161868817
3679
Concluding Work
Work
Procedure:
Information
Brief breaks in communication between the control units during programming and coding can result in
fault memory entries in all control units in the vehicle system, which might not be deleted automatically.
In addition to the automatic deletion of the fault memories during programming, the fault memories
of all control units must therefore be read out and deleted again as described below after each
programming and coding process.
1
Read out and erase the fault memories of all control units.
1.1
Press •F7“ in the control unit selection screen ('Overview' menu) to call up the Additional
menu.
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1.2
Select the function “Read all fault memories
and erase if required” and press •F12“
('Next') to confirm your selection  Erasing
fault memories.
The fault memories of the control units are
read out.
1.3
Once you have read out the fault memories,
check the fault memory entries.
Erasing fault memories
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.
1.4
Press •F8“ to delete fault memory entries.
1.5
Press •F12“ ('Yes') in response to the question as to whether you really want to delete all
fault memory entries.
The faults stored in the fault memories of the various control units are deleted.
Information
If fault memory entries for individual control units cannot be deleted, proceed as follows:
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•
Switch off the ignition.
•
Disconnect the PIWIS Tester diagnostic connector from the diagnostic socket.
•
Lock the vehicle using the driver's key.
•
Wait approx. 1 minute before unlocking the vehicle again.
•
Start the engine, leave it running for a short time and then stop it again.
•
Switch off the ignition and wait approx. 10 seconds before switching it back on again.
•
Plug the PIWIS Tester diagnostic connector into the diagnostic socket again and restore
communication with the vehicle.
•
Read out the fault memory again and delete any fault memory entries that are stored.
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Once you have erased the fault memories,
select the 'Overview' menu to return to the
control unit selection screen  Control unit
selection.
2
Switch off the ignition.
3
Disconnect the PIWIS Tester from the vehicle.
4
Switch off and disconnect the battery charger.
5
Enter the campaign in the Warranty and Maintenance
booklet.
Control unit selection
Warranty processing
Information
The working times specified were determined especially for the performance of this campaign and may
deviate from the working times published in the catalog of operations contained in PIWIS.
Scope 1:
Re-program DME control unit
•
Vehicles with PDK transmission (I-no. 250)
Working time:
Re-programming DME control unit
Includes:
Connecting and disconnecting battery charger
Connecting and disconnecting PIWIS Tester
Re-programming PDK control unit
Reading out and erasing fault memories
Labor time: 57 TU
 Damage Code WKE8 066 000 1
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Scope 2:
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Re-program DME control unit
•
Vehicles with 6-speed GT sport manual transmission (I-no. 486)
Working time:
Re-programming DME control unit
Includes:
Connecting and disconnecting battery charger
Connecting and disconnecting PIWIS Tester
Reading out and erasing fault memories
Labor time: 45 TU
 Damage Code WKE8 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.
© 2019 Porsche Cars North America, Inc.
Jul 12, 2019
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