122-S5V2E-09

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Technical Information
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WG28 - Re-programming Front Axle Lift System Control Unit (Workshop Campaign)
Revision:
Revision 1 — August 11, 2016
This revision amends WG28 as follows:
Under “Re-programming Front Axle Lift System Control Unit” Work Procedure Step 1, line 5 of table was
changed to:
Software version programmed during this campaign: 0930
Following control unit programming, the software version can be read out of the front axle lift
system control unit in the  'Extended identification' menu using the PIWIS Tester.
Model Year:
2017
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. Please refer to Equipment Information EQ1401 for a list of suitable
battery chargers/power supplies which should be used to maintain vehicle voltage.
Model Line:
911 (991)
Equipment:
Front axle lift function (I-no. 474)
Subject:
Front axle lift system control unit
Information:
The error message "Error lift system - service necessary" can appear sporadically in the
instrument cluster on the affected vehicles because the front axle lift system diagnostic
function is too sensitive.
The front axle lift system is then not available until such a time as the ignition is switched off and on again.
Remedial
Action:
Re-program front axle lift system control unit using the PIWIS Tester with software version 33.600.010
(PIWIS Tester 3) or version 17.600.010 (PIWIS Tester II) or a higher software version installed.
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.
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Information
The total time required for programming and coding the control unit is approx. 4 minutes.
Affected
Vehicles:
Only the vehicles assigned to the campaign (see also PIWIS Vehicle information). This campaign affects
596 vehicles in North America.
Required Tools
Tools:
•
•
Battery Charger/Power Supply - Suitable for AGM Type batteries, recommended current rating of
70A fixed voltage 13.5V to 14.5V. Refer to Equipment Information EQ-1105.
9900 - PIWIS Tester 3 with PIWIS Tester software version 33.600.010 (or higher) installed
or
•
9818 - PIWIS Tester II with PIWIS Tester software version 17.600.010 (or higher) installed.
Preparatory Work
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 battery charger or power supply, suitable for AGM
type batteries, recommended current rating of 70A fixed voltage 13.5V to 14.5V.
NOTICE
Control unit programming will be aborted if the Internet connection is unstable.
•
An unstable Internet connection can interrupt communication between PIWIS Tester and the vehicle
communication module (VCI). As a result, control unit programming may be aborted.

During control unit programming, always connect PIWIS Tester to the vehicle communication module (VCI)
via the USB cable.
NOTICE
Control unit programming will be aborted if the vehicle key is not recognized
•
If the vehicle key is not recognized in vehicles with Porsche Entry & Drive, programming cannot be started
or will be interrupted.

Switch on the ignition using the original vehicle key. To do this, replace the original vehicle key in the
ignition lock with the plastic key fob if it was previously removed at the start of this procedure.
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Work Procedure: 1
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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 - section on "Preliminary work"'.
Re-programming Front Axle Lift System Control Unit
Information
The procedure described here is based on the PIWIS Tester II software version 17.600.010.
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.
Work Procedure: 1
Re-program front axle lift system control unit.
The basic procedure for programming a control unit is described in the Workshop Manual 
Workshop Manual '9X00IN Basic instructions and procedure for control unit programming using the
PIWIS Tester - section on "Programming"'.
Use the "Campaign" function in the Additional menu on the PIWIS Tester by entering the specific
programming code, found in the chart below.
For specific information on control unit programming during this campaign, see table
below.
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.
Required PIWIS Tester software version:
• PIWIS Tester 3:
33.600.010 (or higher)
• PIWIS Tester II:
17.600.010 (or higher)
Programming code:
N2M8V
Programming sequence:
Read and follow the information and instructions
on the PIWIS Tester during the guided
programming sequence.
During the programming sequence, the front axle
lift system control unit is re-programmed and then
re-codedautomatically.
Do not interrupt programming and coding.
Programming time (approx):
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4 minutes
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Software version programmed during this
campaign:
0930
Following control unit programming, the software
version can be read out of the front axle lift system
control unit in the  'Extended identification' menu
using the PIWIS Tester.
Procedure in the event of error messages
appearing during the programming
sequence:
 Workshop Manual '9X00IN Basic instructions and
Procedure in the event of abnormal
termination of control unit programming:
Repeat control unit programming by entering the
programming code again.
procedure for control unit programming using the
PIWIS Tester'.
Reading Out and Erasing Fault Memory
Work Procedure: 1
2
In the control unit selection screen ( 'Overview' menu), press •F7“ to call up the Additional menu.
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.
3
Once you have read out the fault memories, erase the
fault memory entries by pressing •F8“.
4
Press •F12“ ('Yes') in response to the question as
to whether you really want to delete all fault memory
entries.
Erasing fault memories
The faults stored in the fault memories of the various control units are deleted.
Information
If the fault memories of individual control units cannot be erased, 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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If the control units still have faults that cannot be deleted and are not caused by control unit
programming, these faults must be found and corrected. This work cannot be invoiced under the
workshop campaign number.
5
Once you have erased the fault memories, select
the  'Overview' menu to return to the control unit
selection screen  Control unit selection.
Control unit selection
Concluding Work
Work Procedure: 1
Switch off the ignition.
2
Disconnect the PIWIS Tester from the vehicle.
3
Switch off and disconnect the battery charger.
4
On vehicles with Porsche Entry & Drive, replace the original vehicle key in the ignition lock with the
control panel again.
Warranty Processing
Information
The specified working time was determined specifically for carrying out this campaign and includes all
required preliminary and subsequent work.
The working time may differ from the working times published in the Labor Operation List in PIWIS.
Scope:
Working time:
Re-programming front axle lift system control unit
Includes:
Connecting and disconnecting battery charger
Connecting and disconnecting PIWIS Tester
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Labor time: 20 TU
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Reading out and erasing fault memory
 Damage Code WG28 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. If a particular condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your authorized Porsche Dealer for the latest information
about whether a particular technical bulletin applies to your vehicle. Part numbers listed in these bulletins are for reference only. Always check with your authorized Porsche dealer to verify the current and
correct part numbers. 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.
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Distribution
Routing
Service Manager
_______
Shop Foreman
_______
Service Technician
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_______
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Asst. Manager
_______
Warranty Admin.
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Service Technician
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