Service

Technical Information

2024

ENU

WRW1

WRW1 - Re-Programming the External Communication Control Unit (OTA-FC) (Workshop/OTA
Campaign)

9

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.

Model Year:

As of 2020 up to 2024

Model Line:

Taycan (Y1A, Y1B, Y1C)

Concerns:

External communication control unit (OTA-FC)

Cause:

This software update of the external communication control unit (OTA-FC) improves the online diagnostic
capability and optimizes the access to diagnostic data for the affected vehicles.
In order to enable utilization of the online diagnosis, consent to product improvements in the MyPorsche app
is required by the respective customer (MyPorsche/Account/App settings/Privacy).

Action:

•
•

Re-program the external communication control unit (OTA-FC) using the latest PIWIS Tester software
release.
Minimum requirement: Version 43.200.000

Information
Scope definition
Scope 1: Over-the-Air (OTA) software update via PCM.
•

Please note that as a rule the OTA software updates should be installed by the driver (main user) via the
Porsche Communication Management (PCM), provided that the software package for the campaign
has been downloaded to the vehicle via OTA (Scope 1) and the update is then displayed in the PCM
‘Updates’ menu.

Scope 2: Re-program the external communication control unit (OTA-FC) using the PIWIS Tester.
•

For vehicles on which the preconditions for performing an OTA software update are not met at the time
of publication of the campaign (online software update in MyPorsche deactivated/Privacy Mode/guest
user), no OTA update is displayed in the vehicle (PCM). These vehicles are therefore assigned to the
Scope 2 of this campaign and must be updated with the current PIWIS Tester test software for the
corresponding control unit.

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Service
WRW1

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Technical Information

2024

Scope 3: Re-program external communication control unit (OTA-FC) using PIWIS Tester - Online software
update has not yet been displayed in the PCM or is updated during a workshop appointment (e.g. as part of
an integration test).
•

Affected
Vehicles:

If the driver has not performed the OTA software update at the time of a workshop appointment (Scope
1), or the software update is not displayed in the PCM, the campaign can optionally be carried out via
the PIWIS Tester. In this case, Scope 3 must be invoiced.

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

Required tools
Tools:

•
•

Battery charger with a current rating of at least 90 A and a current and voltage-controlled charge map
for lithium starter batteries, e.g. VAS 5908 Battery charger 90 A
P90999 - PIWIS Tester 4 with test software version 43.200.000

Re-programming the external communication control unit (OTA-FC)
Work Procedure: 1

The prerequisites and general procedure for control unit programming are described in the Workshop
Manual ⇒ Workshop Manual '9X00IN Basic Instructions and Procedure for Control Unit Programming
Using the PIWIS Tester'.

2

After the backup documentation process, the integration test is started automatically. The result is
initially to be ignored.

3

Re-program the external communication control unit (OTA-FC).
For specific information on control unit programming during this campaign, see the table below:
Required PIWIS Tester software release:

43.200.000 (or higher)

Type of control unit programming:

Control unit programming using the "Automatic
programming" function in the external communication
control unit (OTA-FC).

Programming sequence:

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

Programming time (approx.):

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20 minutes

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Service

Technical Information

2024

Software release programmed during this
campaign:

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ENU

WRW1

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1815
Following control unit programming, the software
release can be selected from the relevant control unit
in the “Extended identifications” menu using the PIWIS
Tester.

Procedure in the event of termination of
control unit programming:

Repeat control unit programming by restarting
programming.

Procedure if error messages appear during
programming sequence:

⇒ Workshop Manual '9X00IN Basic instructions and
procedure for control unit programming using the
PIWIS Tester - section on “Troubleshooting”'.

Read out all fault memories, process existing faults if necessary and delete fault memory.
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.

5

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 and
their status overview.
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.

6

Enter the campaign in the Warranty and Maintenance Logbook.

Warranty processing
Scope 1:

Over-the-Air (OTA) software update via PCM
•

Scope 2:

No invoicing possible.

Re-programming the external communication control unit (OTA-FC) using the PIWIS Tester
•

Vehicles without OTA activation.

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Technical Information

2024

Labor time:
Re-programming the external communication control unit (OTA-FC)
Includes:
Connecting and disconnecting battery charger
Connecting and disconnecting PIWIS Tester
Reading out and deleting fault memories

Labor time: 65 TU

Þ Damage code WRW1 066 000 1
⇒
Scope 3:

Re-programming the external communication control unit (OTA-FC) using the PIWIS Tester
•
•

Vehicles with OTA activation
Online software update has not yet been displayed in the PCM or has been updated during a workshop
appointment (e.g. as part of an integration test).
Labor time:
Re-programming the external communication control unit (OTA-FC)

Labor time: 25 TU

Þ Damage Number WRW1 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.

© 2025 Porsche Cars North America, Inc.

Feb 24, 2025
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