Service

Technical Information

2025

ENU

WSE2

2

WSE2 - Re-Program High-Voltage Battery Control Unit (Workshop Campaign)

Change
Overview:

Revision

Date

Change

0

05/21/2025

•

Original Publication

1

06/18/2025

•

Update to terminology in
instructions to Re-program
high-voltage battery control
unit

Model Year:

2025

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 Line:

Panamera E-Hybrid (YAA)
Cayenne E-Hybrid (9YA/9YB)

Concerns:

High-voltage battery control unit

Cause:

Due to a software error in the high-voltage battery control unit, a red warning message "Stop vehicle
safely" may appear in 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 43.400.025

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

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Technical Information

2025

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 it on.

3

Switch on ignition and have the high-voltage system disabled via the tester sequence "Automatic
verification of absence of electric charge". ⇒ Workshop Manual '277583A1 Deactivation/
commissioning of the high-voltage system'

4

Create Pre-VAL, then start logging.

5

Re-program high-voltage battery control unit.
Required PIWIS Tester software release:

43.400.025 (or higher)

Type of control unit programming:

Control unit programming using the "Campaign"
function in the additional menu on the PIWIS
Tester by entering a programming code.

Programming code:

•
•

Programming sequence:

Read and follow the information and instructions
on the PIWIS Tester during the guided
programming sequence.

G3B1D (Panamera)
E3B1D (Cayenne)

Do not interrupt the programming and coding
process.
A backup documentation process for the
re-programmed software releases starts after
programming and coding.

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Programming time (up to):

10 minutes

Procedure if error messages appear during
programming sequence:

⇒ Workshop Manual '9X00IN Basic instructions

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and procedure for control unit programming using
the PIWIS Tester'

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Technical Information

2025

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6

Re-activate the high-voltage system. ⇒ Workshop Manual '277583A1 Deactivation/commissioning of
the high-voltage system'

7

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.

8

End logging, then create Post-VAL.

9

Enter the campaign in the Warranty and Maintenance Logbook.

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
•

Panamera E-Hybrid
Labor time:
Re-program high-voltage battery control unit
Includes:
Connect and disconnect battery charger
Connect and disconnect PIWIS Tester
Deactivate and activate high-voltage system
Read out and delete fault memory

Labor time: 95 TU

⇒ Damage number WSE2 066 000 1

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WSE2

Scope 2:

ENU

Technical Information

2025

Re-program high-voltage battery control unit
•

Cayenne E-Hybrid
Labor time:
Re-program high-voltage battery control unit
Includes:
Connect and disconnect battery charger
Connect and disconnect PIWIS Tester
Deactivate and activate high-voltage system
Read out and delete fault memory

Labor time: 94 TU

⇒ Damage number WSE2 66 000 1

Additional instructions if programming is aborted
Information
If individual programming steps or rework could not be carried out correctly, follow 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
"Troubleshooting"'
During programming always create a logging and, in the event of a fault, a VAL (vehicle analysis log) with
the PIWIS Tester.
Work
Procedure:

Situation:

Action:

After cancelling the control unit programming, the
fault memory entry U003800 - Private CAN bus,
no communication (D12B02) is displayed in the
control unit.

Repeat control unit programming with the following
programming code:
•
•

G3B3C (Panamera)
E3B3C (Cayenne)

Locking time is active and the programming is
cancelled repeatedly as a result.

•
•
•

Deactivate high-voltage system.
Start logging.
Erase fault memory from BMC (Faults remain
active because the high-voltage system has
been deactivated; faults can be ignored in this
step).
Using the "Campaign" function in the additional
menu, enter the campaign code "G3B1D"
(Panamera) or enter "E3B1D" (Cayenne).
If the programming process runs without errors:
End logging and park vehicle (no further steps
necessary).

•
•

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Technical Information

2025
•

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•

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ENU

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If the programming process does not run
correctly (blocking time error): Cancel
campaign, switch back to the control unit
overview and continue with the next step.
When the ignition is switched on, leave the
vehicle incl. the vehicle communication module
(VCI) plugged in for 15 min.
After 15 minutes, use the additional menu
to re-enter the campaign code "G3B1D"
(Panamera) or "E3B1D" (Cayenne) (there
should no longer be a blocking time error).
If the programming process runs without
errors: End logging and park vehicle (no further
steps necessary).
If the programming process did not run
correctly: End logging and create VAL;
create PRMS ticket and attach logging.

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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