Service

Technical Information

189/24 ENU

WRT0

2

WRT0 - Re-Programming DME Control Unit (Workshop Campaign)

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:

2019

Vehicle Type:

911 Turbo S (991)

Equipment:

Emissions concept LEV2 (M-no. 162)

Concerns:

DME control unit

Cause:

There is a possibility that the software of the DME control unit on the affected vehicles does not
meet the required specifications.

Action:

Re-program the DME control unit with the latest PIWIS Tester software release.
Minimum requirement: Release 42.950.048

Affected
Vehicles:

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, e.g. VAS 5908 - battery charger 90 A
P90999 - PIWIS Tester 4

Re-programming DME control unit
Work Procedure: 1

Re-program DME control unit.
The basic procedure for control unit programming is described in the Workshop Manual. 
Workshop Manual '9X00IN Basic instructions and procedure for control unit programming using the
PIWIS Tester'
Required PIWIS Tester software release:

42.950.048 (or higher)

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Type of control unit programming:

Control unit programming using the 'Automatic
programming' function of the DME control unit:
‘DME’ control unit – ‘'Coding/programming'
menu – 'Automatic programming' function.
Read and follow the information and instructions
on the PIWIS Tester during the guided
programming sequence.
During the programming sequence, the DME
control unit is re-programmed first, and then the
transmission control unit is re-programmed.

Programming sequence:

Both control units are then automatically
re-coded.
Do not interrupt programming and coding.
Once the control units have been programmed and
coded, you will be prompted to switch the ignition
off and then back on again after a certain waiting
time.
Backup documentation of the new software
releases is then performed.

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The programming sequence takes
(approx.):

12 minutes

Record (software part number and
software version) programmed for the
DME control unit during this programming:

• DME control unit
Software release: 3898 (or higher)
Software part number: 9P1906032L

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

• Switch the ignition off and on again.
• Read out and delete the fault memories 
Workshop Manual '9X00IN Basic instructions and
procedure for control unit programming using the
PIWIS Tester - "Rework" section'.
• Repeat control unit programming by restarting
programming.

Procedure in the event of other error
messages appearing during the
programming sequence:

 Workshop Manual '9X00IN Basic instructions and
procedure for control unit programming using the
PIWIS Tester - chapter on "FSL Fault finding"'

2

In the Overview, select the DME control unit.

3

Select Service/repairs. Press •F12“ to continue.

4

Select Adaptations. Press •F12“ to continue.

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Technical Information

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All functions listed under Adaptations must be individually selected and adapted.
5

Select function. Press •F12“ to continue.

6

Adapt function. Press •F8“ to start.
6.1

7

Perform adaptation according to menu guidance. End adaptation with •F8“.

Select the next function. Perform adaptation (for instructions, see above).

Information
If control units are found to have faults that are not caused by control unit programming, these must first
be located and corrected. This work cannot be invoiced under the workshop campaign number.
8

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

9

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

10 Switch off and disconnect the battery charger.
11 Attach Recall Proof of Completion label to the front lid (California Porsche Centers only).
Instructions for attaching labels
•
•
•
•

Surfaces on which you intend to attach the label must be clean, dry and free from grease and oil
residues.
Before attaching the label, clean the surfaces using a suitable cleaning agent and a clean,
grease-free and lint-free cloth.
This label must not be affixed over existing label.
Attach label only at the specified positions.

11.1

Fill out the Recall Proof of Completion label

 Recall Proof of Completion Label fully
and correctly. This includes the recall code
“WRT0”, your Porsche Center code and the
repair date.
11.2

Clean the surface in the lower area on the
front lid at the left-hand side in direction
of travel at which the Recall Proof of
Completion label must be attached  Proof
of Completion Label: specified position
(Exemplary illustration) -arrow- using
a suitable cleaning agent and a clean,
grease-free and lint-free cloth.

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Recall Proof of Completion Label

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11.3

Affix Recall Proof of Completion label in the
lower area of the front lid at the lefthand side
in direction of travel  Proof of Completion
Label: specified position (Exemplary illustration) -arrow-.

11.4

Close front lid.

12 Enter the campaign in the Warranty and Maintenance
Logbook.

Proof of Completion Label: specified
position (Exemplary illustration)

Warranty processing
Information
The specified labor time was determined specifically for carrying out this campaign and includes all
necessary preliminary and subsequent rework. The labor time may differ from the labor time published
in the Labor Operation List in the PCSS.
Scope 1:

Re-programming DME control unit
Labor time:
Re-programming DME control unit
Includes:
Connect and disconnect battery charger
Connect and disconnect PIWIS Tester
Performing adaptations
Reading out and deleting fault memories
Creating Vehicle Analysis Log
Attach Recall Proof of Completion label and provide signed
proof of correction to customer (California Porsche Centers
only)
Required parts:

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PNA EMI 000 00

Label
– Recall Proof of
Completion

1 ea.

PNA 999 100 235

Certificate
- Recall Proof of
Correction

1 ea.

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Labor time: 97 TU

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* California Porsche Centers only:
•
•

For warranty processing, enter the Part No. PNA EMI 000 00 with the designation "label" as a
local part at US$ 0.34 in the warranty claim.
For warranty processing, enter the Part No. PNA 999 100 235 with the designation "certificate"
as a local part at US$ 0.01 in the warranty claim.

 Damage number WNT0 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.

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