SB-10054486-6165

Service

Technical Information

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WD52 - Re-programming Control Units for Rear Axle Steering (Workshop Campaign)

Important:

CRITICAL WARNING - THIS CAMPAIGN INCLUDES STEPS WHERE SEVERAL CONTROL UNITS IN
THE VEHICLE WILL BE PROGRAMMED WITH THE PIWIS TESTER. IT IS CRITICAL THAT THE VEHICLE
VOLTAGE BE BETWEEN 13.5 VOLTS AND 14.5 VOLTS DURING THIS PROGRAMMING. OTHERWISE, THE
PROGRAMMING COULD FAIL RESULTING IN DAMAGED CONTROL UNITS. CONTROL UNITS DAMAGED BY
INADEQUATE VOLTAGE WILL NOT BE COVERED UNDER WARRANTY. THE TECHNICIAN MUST VERIFY THE
ACTUAL VEHICLE VOLTAGE IN THE INSTRUMENT CLUSTER OR IN THE PIWIS TESTER BEFORE STARTING
THE CAMPAIGN AND ALSO DOCUMENT THE ACTUAL VOLTAGE ON THE REPAIR ORDER. IT IS ALSO
ADVISABLE TO MONITOR THE VEHICLE VOLTAGE DURING THE PROGRAMMING VIA THE INSTRUMENT
CLUSTER. PLEASE REFER TO EQUIPMENT INFORMATION EQ-1105 FOR A LIST OF SUITABLE BATTERY
CHARGERS/POWER SUPPLIES WHICH SHOULD BE USED TO MAINTAIN VEHICLE VOLTAGE.

Model Year:

2014

Vehicle Type:

911 Turbo (991)/911 Turbo S (991)/911 GT3 (991)

Concerns:

Control units for rear axle steering

Information:

This is to inform you of a voluntary Workshop Campaign on the above-mentioned vehicles. Due to a
software error in the control unit for rear axle steering, the rear axle steering can malfunction
when driving at low speeds combined with significant steering movements, e.g. when
manoeuvring the vehicle.
If this is the case, the rear axle steering actuators will be locked in their current position and the red
warning message "Breakdown rear-wheel steering" will be displayed in the instrument cluster.
The vehicle then behaves like a vehicle with conventional toe control arms, but the steering wheel can be
out of line.
The rear axle steering function is fully available again after switching the ignition off and on again.

Action
Required:

Re-program control units for rear axle steering.
Information
It takes approx. 4 minutes in total to program both control units for rear axle steering.

Affected
Vehicles:

The VIN(s) can be checked by using PIWIS Vehicle Information link to verify if the campaign affects the
vehicle. This campaign is scope specific to the VIN! Failure to verify in PIWIS may result in an improper
repair. This campaign affects 389 vehicles in North America.

Tools:

•

9818 - PIWIS Tester II with software version 12.900 (or higher) installed

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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.

Work
Procedure:

See Attachment “A”.

Claim
Submission:

See Attachment “B”.

Attachment "A"
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 to the vehicle.

NOTICE
Control unit programming will be aborted if the Internet connection is unstable.
•

An unstable Internet connection can interrupt communication between PIWIS Tester II and the vehicle
communication module (VCI). As a result, control unit programming may be aborted.



During control unit programming, always connect PIWIS Tester II 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.

Work
Procedure:

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NOTE: VEHICLE VOLTAGE MUST REMAIN BETWEEN 13.5 AND 14.5 VOLTS DURING THE ENTIRE WORK
PROCEDURE.

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Connect a battery charger or power supply,
suitable for AGM type batteries, recommended
current rating of 70A fixed voltage 13.5V to 14.5V
First connect the positive cable of the charger
to the positive terminal of the battery and then
connect the negative cable of the charger to the
ground point for jump-lead starting  External
power supply.

External power supply
2

Switch on the ignition using the original driver's key. On vehicles with “Porsche Entry & Drive”,
do this by replacing the control panel in the ignition lock with the original driver's key if necessary.

3

9818 - PIWIS Tester II with software version 12.900 (or higher) installed must be connected to
the vehicle communication module (VCI) via the USB cable. Then, connect the communication
module to the vehicle and switch on the PIWIS Tester.

Re-programming and coding control units for rear axle steering
Information
The procedure described here is based on the PIWIS Tester II software version 12.900.
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:

NOTE: VEHICLE VOLTAGE MUST REMAIN BETWEEN 13.5 AND 14.5 VOLTS DURING THE ENTIRE WORK
PROCEDURE.

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On the PIWIS Tester start screen, call up the  'Diagnostics' menu and select vehicle type 
'911'  '991'.
The diagnostic application is then started and the control unit selection screen is populated.

2

In the control unit selection screen ( 'Overview'
menu), press •F7“ to call up the  'Additional
menu' ( Control unit selection).

Control unit selection
3

When the question “Create Vehicle Analysis Log (VAL)?” appears, either press •>>“ to create a
VAL or press •F11“ if you do not want to create a VAL.

4

Press •>>“ to acknowledge the message informing you that campaigns for the vehicle are stored
in the PIWIS information system.

5

Select the  'Campaign' function and press
•>>“ to confirm your selection  Additional
menu – Campaign.
You are then prompted to enter a programming
code.

Additional menu – Campaign

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To enter the programming code, click in the
relevant text box so that the cursor starts to flash
 Programming code input field.

Programming code input field
7

Enter the programming code M6J3U and press •Enter“ to confirm.
The text box turns blue.
Press •>>“ to start the guided programming sequence.

Information
Read and follow the information and instructions on the PIWIS Tester during the guided
programming sequence.
The control unit for left rear axle steering is re-programmed first, then the control unit for right rear
axle steering is re-programmed automatically. Once programming is complete, both control units are
re-codedautomatically.
Do not interrupt programming and coding.
If an error message is displayed after starting programming (e.g. “Campaign does not exist”, “No
suitable programming rules found” or “Vehicle data could not be read”, etc.), follow the appropriate
instructions provided under  Technical Information 'WD5200 Troubleshooting'.
If programming is interrupted (e.g. due to a voltage drop or if communication is aborted, etc.) or if
programming could not be carried out successfully (error message “Programming unsuccessful”),
programming must be repeated by entering the programming code M6J3U again (Additional menu >
Campaign >> Enter campaign number).
It is not possible to program the control units manually.
Once the control units have been programmed and coded, the PIWIS Tester will prompt you to switch the
ignition off and then back on again after a waiting time of approx. 10 seconds.
Once programming is completed successfully (message “Campaign was carried out successfully”), carry
out the steps described below.

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Once control unit programming and coding has been completed successfully, press •>>“ to
return to the start page of the Additional menu.

9

Press •“ to
confirm  Erasing fault memories.
The fault memories of the control units are read
out.

Erasing fault memories
3

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Once you have read out the fault memories, delete the fault memory entries by pressing •F8“.

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Press •>>“ (“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 the fault memories of individual control units (e.g. DME, PDK, etc.) cannot be erased, start the engine
briefly and then switch it off again. Wait for approx. 10 seconds before switching the ignition on again and
re-establish the connection between the PIWIS Tester and the vehicle. Then read out and erase the fault
memories of the affected control units again separately.
If the fault memory entries are still present, proceed as follows:
•

Switch off ignition.

•

Disconnect the PIWIS Tester diagnostic connector from the diagnostic socket.

•

Lock the vehicle using the driver’s key.

•

Wait for approx. 1 minute, then unlock the vehicle again and restore the connection between the
PIWIS Tester and the vehicle.

•

Read out and erase the fault memories of the control units again.

If the control units are found to have other faults, which cannot be erased 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 and press •
Vehicle information.

•

Vehicle order is wrong.

•

Check vehicle order and
correct it if necessary
(PIWIS Tester > Additional
menu >> Maintenance of
vehicle data).

Vehicle data could not be read.

•

Ignition not switched on.

•

Switch on ignition and close
and restart the diagnostic
application. Then enter the
campaign number again
and start programming.

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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Dealership
Distribution
Routing

Service Manager

_______

Shop Foreman

_______

Service Technician

________

_______

_______

_______

Asst. Manager

_______

Warranty Admin.

_______

Service Technician

________

_______

_______

_______

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