2

Þ Install coolant nozzles -1Connect coolant nozzles ⇒
Þ Install coolant nozzles -2- on the left
to supports ⇒
and right of the new high-voltage battery.

Install coolant nozzles
7

Þ Replace anti-roll bar
Replace anti-roll bar fastenings ⇒
fastening -1- with fastenings with model year 2025
component status, replacing rubber bearings.
For work procedure, see:
⇒ Workshop Manual '407919 Remove and install
anti-roll bar mount'

8

Install high-voltage battery, observing the following:
•

•
•
•

Tightening sequence of the converted mounting
brackets, see ⇒ Workshop Manual '270819
removing and installing attachment parts on the
high-voltage battery '
Install new front axle support (rear section)
Do not perform any further activities on the
vehicle or PIWIS Tester during the cooling system
ventilation routine
Do not perform commissioning of the
high-voltage system

Replace anti-roll bar fastening

Information
For subsequent programming of the high-voltage battery, the high-voltage system on the vehicle must
be disconnected from the power supply (deactivated).

⇒ Workshop Manual '270819 Remove and install high-voltage battery'

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Information
When assembling the front cover, make sure that the
Þ Screw points for front
two screw connections are ⇒
cover -green circle- first fastened at the rear in the
direction of travel.

Screw points for front cover
It may be necessary to rework the specified screw
points slightly for mounting the front cover. ⇒ Screw
point reworked

Screw point reworked

Program high-voltage battery
Information
Before starting the test, the following points must be fulfilled:
•

The high-voltage battery has been completely replaced

•

Cooling system is filled and ventilation routine performed

•

Jack mode is not active

•

The high-voltage system on the vehicle is disconnected from the power supply (deactivated)

Work procedure: 1

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Establish readiness for operation and start the diagnostic application.

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2708

2

Information
The high-voltage battery programming sequence must not be interrupted.
2

Write the serial number of the new high-voltage battery into the high-voltage battery control unit.
2.1

Select "High-voltage battery" control unit in the control unit selection "Overview" and press
•F12“ ("Next") to confirm selection.

2.2

Select "Serial number coding for the high-voltage battery".

2.3

Follow Tester instructions and notes.

2.4

Enter new serial number of the high-voltage battery according to menu guidance.

Information
The vehicle data is maintained via a guided Tester procedure.
Pay particular attention to the following:

3

•

A connection to the Internet is required for the Tester procedure.

•

Depending on the changes made to the vehicle data, automatic coding and backup documentation
of the affected control units is performed after saving these changes.

•

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

•

Do not interrupt the coding process. When coding is complete, the message ''Coding has been
completed successfully'' is displayed and a tick will then appear in the ''Status'' box.

Add control number "ST6 - J1PA HVB REINSTALLATION FOR CS" to vehicle order.
3.1

In the control unit selection ('Overview' menu) press •F7“ to call up the Additional menu.

3.2

Select the ‘Vehicle data maintenance with PIWIS ONLINE’ function and press •F12“ (‘Next’)
to confirm.

3.3

Press •F12“ (‘Next’) to skip the displays containing information about vehicle description,
colors/materials and X numbers.

3.4

Add coding value "ST6 - J1PA HVB REINSTALLATION FOR CS" to the vehicle data. Moreover,
for the relevant coding value, click on the tick in the “Installed” field to select the value.
Make sure that the ‘Installed’ column is subsequently ticked and that the pen symbol is
displayed in the ‘Changed’ column.

3.5

No further PR number may be set.
If, for example, PR number "ST3" or "ST5" is set, delete it.

3.6

Then press •F12“ ('Next') to close the PR numbers display.

3.7

Press •F8“ in the overview that is then displayed to save the changed vehicle data.

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3.8
4

Technical Information

02/25

Once you have saved the vehicle data, press •F11“ (‘Back’) to return to the control unit
selection screen.

Program high-voltage battery.
4.1

Select "High-voltage battery" control unit in the control unit selection "Overview" and press
•F12“ ("Next") to confirm selection.

4.2

Start required programming with •F8“.

4.3

Follow the instructions on the PIWIS Tester.

5

Activate the high-voltage system.
⇒ Workshop Manual '277583 Deactivate and activate high-voltage system'

6

Delete history memory.
6.1

Select “High-voltage battery” control unit in the control unit selection “Overview” and press
•F12“ (“Next”) to confirm the selection.

6.2

Select the ‘Drive links checks’ menu.

6.3

Select ‘Delete history memory’ and reset parameter ‘Reset all HDM/HDMP’ with •Start
[F8]“.

6.4

Establish bus idle for at least 5 minutes on the vehicle.
For this purpose:
•
•
•
•

7

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Disconnect the battery charger
End diagnostic application, end readiness for operation, and disconnect P90999 - PIWIS
Tester 4 from vehicle
Lock the vehicle
Place driver's key outside the frequency range of the vehicle

6.5

Connect and switch on the battery charger.
For work procedure, see: ⇒ Workshop Manual '270689 Charge vehicle electrical system
battery'

6.6

Place the original remote control in the emergency start tray.

6.7

Establish readiness for operation and start the diagnostic application.

6.8

Select the ''High-voltage battery control unit'' control unit in the control unit selection
"Overview" and press •F12“ ('Next') to confirm selection.

6.9

Read out and delete fault memories.

6.10

If the fault memory entries ''Diag_F_CMC**_Performance_*'' are still present, perform step
⇒ 6 again.

Review the thermal management software status and re-program if necessary.

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Information
If the software status in the thermal management control unit (J1024) is lower than "0325", a
campaign has not yet been carried out with regard to the software status.
7.1

Select the "Thermal management (J1024)" control unit in the control unit selection "Overview"
and press •F12“ ('Next') to confirm selection.

7.2

Check software for required Software status "0325" (or higher).
Assessment
( )
✗)
(✗

Action

The software version is "0325" (or
higher).

The current software version is OK.

The software version is not "0325" (or
higher).

The current software version is not OK.

Continue with Step ⇒ 10.
Review open campaigns of the vehicle.
Re-program thermal management control
unit (J1024) via open campaign.
Then continue with Step ⇒ 10.

8

9

Carry out airbag zero-position calibration.
8.1

Select the "A irbag" control unit in the control unit selection screen ("Overview" menu) and press
•F12“ ("Next") to confirm your selection.

8.2

Select the menu "Maintenance/repairs" then select the "Teach combination sensor" function
and press •F12“ ('Next') to confirm your selection.

8.3

Follow the instructions on the PIWIS Tester.

Perform component protection commissioning.
9.1

In the control unit selection ('Overview' menu) press •F7“ to call up the Additional menu.

9.2

Select "Component protection commissioning".

9.3

Select "High-voltage battery control unit".

9.4

Follow the instructions on the PIWIS Tester.

9.5

Teach component protection according to menu guidance.

10 Read out and delete all control unit fault memories.
11 End the diagnostic application. End readiness for operation and disconnect P90999 - PIWIS Tester 4
from vehicle.
12 Switch off and disconnect the battery charger.
For work procedure, see: ⇒ Workshop Manual '270689 Charge vehicle electrical system battery'

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13 Photo documentation must be attached to the process in PCSS.

Labor position and PCSS encryption
Labor position:
APOS

Labor operation

I No.

27084940

Rework high-voltage battery (without PDCC)

27084941

Rework high-voltage battery (with PDCC)
PCSS encryption:

Location (FES5)

27080

High-voltage battery

Damage type (SA4)

9735

Repair according to PAG instructions

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.

©2026 Porsche Cars North America, Inc.

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