Service

Technical Information

52/23

ENU

WPE7

9

WPE7 – Re-Programming Central Computer (PCM) (Workshop Campaign)

Revision:

This bulletin replaces bulletin Group 9 52/23 WPE7, dated July 7, 2023.

Model Year:

As of 2023

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.

Vehicle Type:

992 (911 Dakar)

Concerns:

Control unit for central computer (PCM)

Cause:

Due to a fault in the software of the central computer (PCM) control unit on the affected
vehicles, the “Driving mode” tab may only be displayed in German.

Actions:

•
•

Affected
Vehicles:

Re-program the central computer (PCM) control unit using the latest PIWIS Tester software release
in each case.
Minimum requirement: Version 42.000.030

Only vehicles assigned to the campaign (see also PCSS Vehicle Information).

Required tools
Tool:

•
•
•

9900 - PIWIS Tester 3/4
Battery charger with a current rating of at least 90 A, e.g. VAS 5908 battery charger 90 A
USB storage medium Type A+C 32 GB (for PCM update), Part No. V04014999WW000,
already available at the Porsche dealer

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Technical Information

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Re-programming central computer (PCM) control unit
Work
Procedure:

Information
Before starting programming, particular attention must be paid to the following:
•

The charger must be switched off and on once; the battery charger display must be off before
starting it again, because the battery charger automatically switches to trickle charge after 5 hours
(default setting in the charger).

•

Set charge voltage to 14.6 volts.

•

Operate in charging mode.

•

Vehicles with a PVTS contract must be activated for Service mode.

•

The PIWIS Tester must not be charged using the cigarette lighter!

1

The basic procedure for the control unit programming is described in the Workshop Manual 
Workshop Manual 'Basic Instructions and Procedure for Control Unit Programming using the PIWIS
Tester'.

2

Create Vehicle Analysis Log (VAL) using the PIWIS Tester. Mark the vehicle analysis log you have just
created with the attribute “Pre-VAL” and after carrying out the campaign, return it using the PIWIS
Tester.

3

Select Guest account from the central display (PCM) and activate Privacy mode (available in some
countries).
Information
If Privacy mode is not active, programming may be aborted, resulting in a defect in the central
computer (PCM). Central computers that are replaced as part of the workshop campaign are
checked by Porsche AG. If private mode was not set in the central computer before starting
programming, the costs will be re-debited.

4

Re-program main computer (PCM).
For specific information on control unit programming during this campaign, see table
below.
Prepare USB stick with the required software (depending on country version).
Overview of the software to be used for the central computer (PCM): See  Technical Information
'overview of PCM update'

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Technical Information

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WPE7

9

Required PIWIS Tester software release:

42.000.030 (or higher)

Type of control unit programming:

In the control unit selection (‘Overview’ menu)
select the PCM central computer control unit
and select the ‘Service / Repairs’ menu.
Select the ‘Install software update’ function
and press •F12“ (‘Next’) to carry out the
software update.

Programming code:

X3G5A

Programming sequence:

Read and follow the information and
instructions on the PIWIS Tester during the
guided programming sequence.
Do not interrupt programming and coding.
A backup documentation process for the
re-programmed software releases starts as
soon as programming and coding is complete.

Programming time (up to):

25 minutes

Control unit programmed in this campaign:

•

Control unit for central computer (PCM)
3849

Following control unit programming, the
software release can be read out from the
relevant control unit in the  ‘Incremented identifications’ menu using the PIWIS Tester.
Procedure in the event of error messages
appearing during the programming sequence:

AfterSales

 Workshop Manual '9X00IN Basic instructions
and procedure for control unit programming
using the PIWIS Tester – section on “Fault
finding”'

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Procedure in the event of a termination in the
control unit programming:

Repeat control unit programming by restarting
programming.
Additional instructions for aborted programming
 Technical Information '9X00IN Additional
information if programming is aborted'

Integration test procedure:

•
•

5

The integration test shows a green result
independently of the necessary campaign
The campaign WPE7 must still be
carried out

Read out all error memories, process and delete existing errors if necessary.
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.

6

Press •F3“ to start the integration test in the control unit selection.
All affected control units should now be successfully re-programmed or checked in the control unit
overview and their status.
Information
If a deviation in the integration test is still indicated despite programming being carried out, this must
be repeated. If the deviation persists, contact Technical Support.

7

Create Vehicle Analysis Log (VAL) using the PIWIS Tester. Mark the vehicle analysis log you have just
created with the attribute “Post-VAL” and after carrying out the campaign, return it using the PIWIS
Tester.

8

Exit the diagnostic application. Switch off ignition. Disconnect the Tester from the vehicle.

9

Set battery charger back to a charge voltage of 14.4 volts.

10 Disassembly tool, e.g. Enter the campaign in the Warranty and Maintenance booklet.

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Warranty processing
Scope 1:

Labor time:
Labor time: 97 TU

Re-programming central computer (PCM) control unit
Includes:
Connecting and disconnecting battery charger
Connecting and disconnecting PIWIS Tester
Reading out and erasing fault memories
Create Vehicle Analysis Logs (VALs) before and after the
campaign
 Damage code WPE7 066 000 1

Overview of PCM update
Information
The central computer (PCM) software update is performed using a USB storage medium. The software
release that is specific to each region must be downloaded using the software tool PiUS (Porsche integrated Update Service) and must be installed on a blank USB storage medium.
Pay particular attention to the following:
•

For this PCM software update, a USB storage medium must be used.

•

To use the software tool, one blank or re-writable USB storage medium is required for each individual software.

•

The software available in PiUS must only be used in accordance with the instructions provided in a
Technical Information published for this purpose.

The software listed here may only be used for the action described here. Damage to the central
computer cannot be ruled out if the software is used on other vehicles.
You will find further information on installation and use for the PiUS software tool in the PPN portal under
*PiUS (Porsche integrated Update Service) goes live*.

Overview:

Part No.

Designation
– Region

Vehicle allocation

9Y2909000L

USB storage medium for PCM
update
– Europe
– RoW

I-No. ER1 / ER2

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9Y2909000M

USB storage medium for PCM
update
– North America
– Mexico

I-No. ER3 / ER4

9Y2909000G

USB storage medium for PCM
update
– Japan
– China
– Korea
– Taiwan

I-No. ER5 / ER6 / ER7 / ER8

Additional instructions if programming is aborted
Information
If individual programming steps or reworking could not be carried out correctly, see Workshop Manual for
the basic procedure for control unit programming using the PIWIS Tester  Workshop Manual '9X00IN
Basic instructions and procedure for control unit programming using the PIWIS Tester – section on “Fault
finding”'
In the event of a fault, logging must always be created during programming using •Ctrl“and •L“using
the PIWIS Tester.

Notes:

Control unit:

Situation:

Action required:

Cancelling individual control
units:

One or more control units
cannot be programmed or can
no longer be accessed

•

•

•

•

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AfterSales

Check on whether the
control unit can be
accessed using the PIWIS
Tester or if bus idle does not
have to be carried out
Control unit still not
accessible –> Remove
fuse for control unit –>
Ignition on –> Ignition off
–> Re-insert fuse
Control unit still not
accessible –> Disconnect
battery overnight
Check whether the control
unit is accessible

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Technical Information

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9

Central computer (PCM)

The central computer freezes
while loading

•
•

Starting programming again
Performing PCM factory
reset using the guided PIWIS
Tester procedure

Central computer (PCM)

The central computer control
unit cannot be accessed

•

Pulling out fuse for central
computer control unit –>
Ignition on –> Ignition off –>
Re-insert fuse

Central computer (PCM)

Programming of the central
computer (PCM) aborts when
Fault 33 is detected

•

Fault 33 is displayed in the
central computer display
during programming
Start the update in the
Developer menu on the
central computer (PCM).
The update may only be
started from the Developer
menu in this case because
the PCM is already in the
Developer menu
If the update still cannot
be performed –> replace
central computer (PCM)

•

•

Central computer (PCM)

No start of programming

•

Programming is started
via the additional menu and
not in the central computer
(PCM) control unit under
Service / repairs as
described in the TI

Central computer (PCM)

Programming is not started or
programming is interrupted

•

For other topics that are
not listed in the TI, a PRMS
ticket must be created
before replacing the PCM
system

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.

© 2023 Porsche Cars North America, Inc.

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