122-J8V9B-06

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Technical Information
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WC34 - Re-programming Front-end Electronics Control Unit and Rear-end Electronics
Control Unit (Workshop Campaign)
Important:
CRITICAL WARNING #1: THIS CAMPAIGN INCLUDES STEPS WHERE SEVERAL CONTROL
UNITS IN THE VEHICLE WILL BE REPROGRAMMED 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.
IT IS ALSO ADVISABLE TO MONITOR THE VEHICLE VOLTAGE DURING THE PROGRAMMING VIA
THE INSTRUMENT CLUSTER. PLEASE REFER TO EQUIPMENT INFORMATION EI-1105 FOR
A LIST OF SUITABLE BATTERY CHARGERS/POWER SUPPLIES WHICH SHOULD BE USED TO
MAINTAIN VEHICLE VOLTAGE.
CRITICAL WARNING #2: As of PIWIS Tester Software version 11.250, it is necessary to have the
ignition on (with the original vehicle key) prior to connecting the PIWIS Tester II to the vehicle.
Failure to turn on the ignition first may result in corruption of the Maintenance of Vehicle Data if
programming or coding operations are carried out. In the event this occurs, the Maintenance
of Vehicle Data must be reentered. You may reference the PPN posting on Maintenance of
Vehicle Data for further information.
Model Year:
As of 2012 up to 2013
Vehicle Type:
911 Carrera (991)/911 Carrera S (991)
Revisions:
Revision 3 — January 17, 2013 – This revision amends WC34 to include a fourth "Information"
paragraph under "Overview of new software versions".
Concerns:
Front-end electronics control unit
Rear-end electronics control unit
Information:
This is to inform you of a voluntary Workshop Campaign on the above-mentioned vehicles.
New data records for the front-end electronics and rear-end electronics control units are available for the
affected vehicles.
•
Front-end electronics control unit:
If the vehicle key is not inserted completely into the ignition lock and the ignition lock is then turned to the
position “Ignition on”, the ignition lock will be locked after removing the key and the vehicle key can no
longer be inserted into the ignition lock.
Vehicles with Porsche Entry & Drive:
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If the vehicle is locked using the locking button in the door handle, the key can be detected in some cases
as being "inside the vehicle" if the vehicle key is too close to the vehicle.
As a result, the key will be disabled for the next keyless access. The doors can then only be unlocked by
pressing the Open button on the driver's key.
To prevent this from happening, the front-end electronics control unit must be re-programmed with an
updated data record.
•
Rear-end electronics control unit:
Due to a software error, there is a possibility that the rear-end electronics control unit will not switch to
energy-saving mode after the vehicle is stopped in the event of specific user behaviour.
This can result in an increased closed-circuit current load and can thus cause the battery to become
discharged.
To prevent this from happening, the rear-end electronics control unit must be re-programmed with an
updated data record.
Action
Required:
Re-program front-end electronics control unit and rear-end electronics control unit.
Information
The total time required for programming and coding is approx. 6-10 minutes.
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.
Tools:
9818 - PIWIS Tester II with software version 10.900 (or higher) installed.
Battery Charger/Power Supply - Suitable for AGM Type batteries, recommended current rating of 70 A,
fixed voltage 13.5V to 14.5V. Refer to Equipment Information EQ1105.
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.
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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 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.
Information
If complaints are received or if warning messages indicating a fault in the Porsche Stability Management
(PSM) system are displayed, these faults must be located and corrected before carrying out control unit
programming.
This work cannot be invoiced under the workshop campaign number.
Important:
CRITICAL WARNING #2: As of PIWIS Tester Software version 11.250, it is necessary to have the
ignition on (with the original vehicle key) prior to connecting the PIWIS Tester II to the vehicle.
Failure to turn on the ignition first may result in corruption of the Maintenance of Vehicle Data if
programming or coding operations are carried out. In the event this occurs, the Maintenance
of Vehicle Data must be reentered. You may reference the PPN posting on Maintenance of
Vehicle Data for further information.
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Procedure:
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Connect a battery charger with a current rating of
at least 40 A.
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 connection.
External power connection
2
Switch on the ignition using the original vehicle key. On vehicles with "Porsche Entry & Drive", do
this by replacing the control panel in the ignition lock with the original vehicle key if necessary.
3
Move the windshield wiper lever to position 0 (= windshield wipers off) to prevent the windshield
wipers from coming on during programming.
4
9818 - PIWIS Tester II with software version 10.900 (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.
VEHICLE VOLTAGE MUST REMAIN BETWEEN 13.5 AND 14.5 VOLTS DURING THE ENTIRE WORK
PROCEDURE.
Carrying out control unit programming
Information
The procedure described here is based on the PIWIS Tester II software version 10.900.
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.
Important:
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CRITICAL WARNING #2: As of PIWIS Tester Software version 11.250, it is necessary to have the
ignition on (with the original vehicle key) prior to connecting the PIWIS Tester II to the vehicle.
Failure to turn on the ignition first may result in corruption of the Maintenance of Vehicle Data if
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programming or coding operations are carried out. In the event this occurs, the Maintenance
of Vehicle Data must be reentered. You may reference the PPN posting on Maintenance of
Vehicle Data for further information.
Procedure:
1
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 •F12“ 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
number.
Additional menu – Campaign
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To enter the programming number, click in the
relevant text box so that the cursor starts to flash
 Programming number input field.
Programming number input field
7
Enter the programming number WC34_991 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. Do not interrupt programming and coding.
VEHICLE VOLTAGE MUST REMAIN BETWEEN 13.5 AND 14.5 VOLTS DURING THE ENTIRE WORK
PROCEDURE.
Programming and coding is performed in several steps:
•
The gateway control unit is first re-coded in preparation for programming.
•
Then, the front-end electronics control unit and the rear-end electronics control unit are also
re-programmed and then automatically re-coded.
•
The gateway control unit is coded again once programming is complete.
The display in the instrument cluster is switched off while the front-end electronics control unit is
being programmed and will remain off during the entire programming procedure.
The message "Ignition key not removed" appears in the multi-function display.
The ignition is still active in the background.
Never switch the ignition off and then on again because if you do, programming will be interrupted and will
then have to be restarted.
The display in the instrument cluster will be switched on again automatically as soon as programming is
complete.
Overview of part numbers of new data records
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Control unit
Porsche part number of new data record
Front-end electronics
7PP907064GN
Rear-end electronics
7PP907279AT
9
The Porsche part number of the front-end electronics control unit and the rear-end electronics control
unit if necessary, which can be read out in the  “Extended identification” menu using the PIWIS Tester,
will not change following control unit programming.
The software version specified in the  “Extended identification” menu is decisive for checking whether
the control unit software is up-to-date.
Overview of new software versions
Model year
Control unit
Software version of new data
record
2012 (C)
Front-end electronics
2220
Rear-end electronics
2240
Information
If programming does not start, the campaign number must be entered again and programming must be
restarted.
Information
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 'WC3400 Troubleshooting'.
Information
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”), follow the instructions provided under  Technical Information 'WC3400 Procedure after
programming is aborted' to repeat the programming procedure.
It is not possible to program the control units manually.
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Information
If one or more control units are not coded successfully (Step 10 of the guided programming
sequence) once control unit programming is complete, the affected control units must be re-coded
again separately once the guided programming sequence is complete.
To do this, select the control unit or control units for which coding could not previously be carried out
successfully in the control unit selection screen ("Overview" menu) and press •>>“ to confirm your
selection. Once the control unit or control units have been found, select the "Codings/adaptations"
menu and re-code the control unit or control units using the "Automatic coding" function.
Once programming is completed successfully (message “Campaign was carried out successfully”), carry
out the Subsequent work described below.
Subsequent work
Important:
CRITICAL WARNING #2: As of PIWIS Tester Software version 11.250, it is necessary to have the
ignition on (with the original vehicle key) prior to connecting the PIWIS Tester II to the vehicle.
Failure to turn on the ignition first may result in corruption of the Maintenance of Vehicle Data if
programming or coding operations are carried out. In the event this occurs, the Maintenance
of Vehicle Data must be reentered. You may reference the PPN posting on Maintenance of
Vehicle Data for further information.
Procedure:
1
Read out and erase all fault memories.
Information
If the fault memories of individual control units cannot be erased, switch the ignition off and then on
again and erase the fault memories of these control units separately.
If control units are found to have faults, which cannot be erased and are not caused by control unit
programming, these faults must be located and corrected.
This work cannot be invoiced under the workshop campaign number.
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.
5
Enter the workshop campaign in the Warranty and Maintenance booklet.
Attachment "B"
Claim Submission - Workshop Campaign WC34
Warranty claims should be submitted via WWS/PQIS.
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Open campaigns may be checked by using either the PIWIS Vehicle Information system or through PQIS
Job Creation.
Labor, parts, and sublet will be automatically inserted when Technician is selected in WWS/PQIS.
If necessary, the required part numbers will need to be manually entered into WWS by the dealer
administrator.
Scope:
Working time:
Labor time: 30 TU
Re-programming front-end electronics and rear-end electronics
Includes:
Connecting and disconnecting battery charger
Connecting and disconnecting PIWIS Tester
Reading out and erasing fault memories
 Damage code WC34 066 000 1
Troubleshooting
Procedure:
Error message after entering
programming number
Possible causes
Remedial action
Specified campaign does not
exist
•
PIWIS Tester software is
not up-to-date
•
Update PIWIS Tester
software to the software
version specified in the
Technical Information
(or a higher software
version). Then enter
the programming
number again and start
programming.
•
Wrong vehicle type
selected
•
Close the diagnostic
application. Select the
correct vehicle type and
restart the diagnostic
application. Then enter
the programming
number again and start
programming.
•
A programming number
does not have to be
entered in order to carry
out the campaign.
•
Carry out the campaign as
described in the Technical
Information.
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No suitable programming rules
found.
Cause: Part number of
the control unit is not in the
programming rules.
•
Campaign must not be
carried out on the vehicle
or campaign was already
carried out.
•
Check vehicle assignment
to the campaign in PIWIS >
Vehicle Information.
•
Replacement control unit
with up-to-date software
version was installed
•
•
Software version of the
installed control unit is
already up-to-date
Check software version of
the control unit in the 
“Extended identification”
menu.
•
Software version of the
control unit is a version that
is not intended for carrying
out the campaign.
Current software version:
– Front-end electronics
2220
– Rear-end electronics
2240
No suitable programming rules
found.
Cause: Current vehicle
equipment is not shown in
the programming rules. Please
check vehicle order and change
it if necessary.
•
Campaign must not be
carried out on the vehicle.
•
Check vehicle assignment
to the campaign in PIWIS >
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 programming
number again and start
programming.
Procedure after programming is aborted
Information
If programming is aborted (the message “Programming was not completed successfully” is displayed
on the PIWIS Tester screen), always proceed in accordance with the procedure described below.
Procedure:
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1
If the message “Programming was not completed successfully” is displayed, first press
•F11“ to cancel the programming procedure and then go back to the start page of the
Additional menu.
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Actuate the central locking button in the centre console to “wake up” the gateway control unit and
re-establish communication between the gateway control unit and the front-end electronics control
unit.
Information
There may be no response or reaction from the vehicle after pressing the central locking
button. Nevertheless, internal communication between the gateway control unit and the front-end
electronics control unit was re-established so that programming can now be carried out again.
3
Select the  'Campaign' function and restart control unit programming by entering the
programming number again.
•
If programming is completed successfully following the restart (message “Campaign was
carried out successfully”), carry out the work described under  Technical Information 'WC3400
Subsequent work'.
•
If programming is not completed successfully even after restarting (message “Programming was
not completed successfully” is displayed again), Steps 1 to 3 must be repeated until programming
is completed successfully. It may be necessary to restart programming up to three times in individual cases.
•
If programming does not start again after entering the programming number or is not
completed successfully even after restarting programming at least three times (message
“Programming was not completed successfully”), carry out the following work:
4
Press •F11“ to cancel programming.
5
Switch off ignition.
6
Pull fuses for the front-end and rear-end electronics control units out of the slot in order to reset the
control units. Then re-insert the fuses.
•
•
Fuses for front-end electronics control unit: Fuse box in left footwell – row B: fuses No. 1 (40 A),
No. 6 (10 A) and row C: fuses No. 2 (40 A), No. 7 (30 A)
Fuses for rear-end electronics control unit: Fuse box in left footwell – row B: fuses No. 2 (15 A),
No. 3 (15 A), No. 4 (15 A) and row C: fuse No. 5 (30 A)
Information
After re-inserting the fuses, there is a possibility that the ignition cannot be switched on and the
instrument cluster will remain off.
However, the driver's key in the ignition lock must still be turned to “Ignition on” position. Communication between the vehicle and PIWIS Tester can then be re-established despite the fact that the
ignition and instrument cluster appear to be switched off.
7
Switch on ignition and restore communication between the vehicle and the PIWIS Tester.
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Actuate the central locking button in the centre console to “wake up” the gateway control unit and
re-establish communication between the gateway control unit and the front-end electronics control
unit.
Information
There may be no response or reaction from the vehicle after pressing the central locking
button. Nevertheless, internal communication between the gateway control unit and the front-end
electronics control unit was re-established so that programming can now be carried out again.
9
Call up the Additional menu on the PIWIS Tester and restart control unit programming again using the
 'Campaign' function by entering the programming number.
•
If programming is completed successfully after resetting the control unit (message “Campaign was
carried out successfully”), carry out the work described under  Technical Information 'WC3400
Subsequent work'.
•
If programming is not completed successfully even after resetting the control unit (message
“Programming was not completed successfully”)  continue with Step 10.
10 Press •F11“ to cancel programming.
11 Switch off ignition.
12 Switch off and disconnect the battery charger.
13 Disconnect the negative terminal of the vehicle battery and wait approx. 1 minute. Then re-connect
the negative terminal of the vehicle battery.
Information
After re-connecting the battery, there is a possibility that the ignition cannot be switched on and the
instrument cluster will remain off.
However, the driver's key in the ignition lock must still be turned to “Ignition on” position. Communication between the vehicle and PIWIS Tester can then be re-established despite the fact that the
ignition and instrument cluster appear to be switched off.
14 Switch on ignition and restore communication between the vehicle and the PIWIS Tester.
15 Actuate the central locking button in the centre console to “wake up” the gateway control unit and
re-establish communication between the gateway control unit and the front-end electronics control
unit.
Information
There may be no response or reaction from the vehicle after pressing the central locking
button. Nevertheless, internal communication between the gateway control unit and the front-end
electronics control unit was re-established so that programming can now be carried out again.
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16 Call up the Additional menu on the PIWIS Tester and restart control unit programming again using the
 'Campaign' function by entering the programming number.
•
If programming is completed successfully after disconnecting and connecting the vehicle battery
(message “Campaign was carried out successfully”), carry out the work required after disconnecting
the battery  Workshop Manual '2X00IN Work instructions after disconnecting the battery' and the
work described under  Technical Information 'WC3400 Subsequent work'.
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.
© Porsche Cars North America, Inc.
Dealership
Distribution
Routing
Service Manager
_______
Shop Foreman
_______
Service Technician
________
_______
_______
_______
Asst. Manager
_______
Warranty Admin.
_______
Service Technician
________
_______
_______
_______
Dr. Ing. h.c. F. Porsche AG is the owner of numerous trademarks, both registered and unregistered, including without limitation the Porsche Crest®, Porsche®, Boxster®, Carrera®, Cayenne®,
Cayman®, Panamera®, Speedster®, Spyder®, 918 Spyder®, Tiptronic®, VarioCam®, PCM®, PDK®, 911®, 4S®, FOUR, UNCOMPROMISED.® and the model numbers and the distinctive shapes of
the Porsche automobiles such as, the federally registered 911 and Boxster automobiles. The third party trademarks contained herein are the properties of their respective owners. Porsche Cars North
America, Inc. believes the specifications to be correct at the time of printing. Specifications, performance standards, standard equipment, options, and other elements shown are subject to change without
notice. Some options may be unavailable when a car is built. Some vehicles may be shown with non-U.S. equipment. The information contained herein is for internal use only by authorized Porsche dealers
and authorized users and cannot be copied or distributed. Porsche recommends seat belt usage and observance of traffic laws at all times.
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