Service

Technical Information

2025

ENU

WSH9

9

WSH9 - Re-program High-Voltage Battery 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:

2025

Model Line:

911 Carrera GTS (992)

Concerns:

High-voltage battery control unit

Cause:

A software error in the high-voltage battery control unit can cause an unauthorized red warning message
"Risk of fire! Switch off and stop the vehicle in a roadworthy manner" to be displayed on the instrument
cluster.

Actions:

•
•

Affected
Vehicles:

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

Re-program the high-voltage battery control unit with the latest PIWIS Tester software release.
Minimum requirement: Release 43.500.000

Required tools
Tools:

•
•

Battery charger with a current rating of at least 90 A, e.g., VAS 5908 battery charger 90 A
P90999 - P90999 - PIWIS Tester 4

Re-program high-voltage battery control unit
1

Read and perform general preliminary work for control unit programming. ⇒ Workshop Manual 'Basic
instructions and procedure for control unit programming using the PIWIS Tester'

2

Connect PIWIS Tester to the vehicle and switch on. PIWIS Tester.

3

Re-program high-voltage battery control unit.

AfterSales

Aug 12, 2025
Page 1 of 4

9

Service
WSH9

ENU

Technical Information

2025

Required PIWIS Tester software release:

43.500.000 (or higher)

Type of control unit programming:

Control unit programming using the “Automatic
programming” function of the high-voltage
battery control unit (BECM):
"High-voltage battery (BECM)" control unit –
"Coding/Programming" menu – "Automatic
programming" function.

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.

4

Software release of the high-voltage battery
control unit to be programmed during this
campaign:

High-voltage battery control unit (BECM)
Software release: 0478

Programming duration (up to):

10 minutes

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

⇒ Workshop Manual '9X00IN Basic instructions
and procedure for control unit programming using
the PIWIS Tester'

Read out all fault memories. If necessary, work through existing faults and delete them.
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

Attach Recall Proof of Completion label to the front lid (California Porsche Centers only).
Instructions for attaching labels
•
•
•

Aug 12, 2025
Page 2 of 4

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.

AfterSales

Service

Technical Information
•

6

2025

ENU

WSH9

9

Attach label only at the specified positions.

5.1

Fill out the Recall Proof of Completion label
⇒ Recall Proof of Completion Label fully
and correctly. This includes the recall code
“WSH9”, your Porsche Center code and the
repair date.

5.2

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
Þ Proof of Completion
must be attached ⇒
Label: specified position (Exemplary illustration) -arrow- using a suitable cleaning agent
and a clean, grease-free and lint-free cloth.

5.3

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

5.4

Close front lid.

Recall Proof of Completion Label

Enter the campaign in the Warranty and Maintenance
Logbook.

Proof of Completion Label: specified
position (Exemplary illustration)

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

Re-program high-voltage battery control unit

AfterSales

Aug 12, 2025
Page 3 of 4

9

Service
WSH9

ENU

Technical Information

2025

Labor time:
Re-program high-voltage battery control unit
Includes:
Connect and disconnect battery charger
Connect and disconnect PIWIS Tester
Read out and delete fault memory
Attach Recall Proof of Completion label and provide signed
proof of correction to customer (California Porsche Centers
only)
PNA EMI 000 00

Label
– Recall Proof of
Completion

1 ea.

PNA 999 100 235

Certificate
- Recall Proof of
Correction

1 ea.

Labor time: 39 TU

* 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.

Þ Damage number WSH9 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.

Aug 12, 2025
Page 4 of 4

AfterSales