Technical Information
2

240/24 ENU

2797

2

Þ New
Fasten new high-voltage charger holder ⇒
high-voltage charger holder -1- to the new 11 kW
high-voltage charger.
2.1

Þ
Position new high-voltage charger holder ⇒
New high-voltage charger holder -1- on new
11 kW high-voltage charger.

2.2

Þ New
Screw-in and tighten new screws ⇒
high-voltage charger holder -2-.
Tightening torque 8 Nm (5.9 ftlb.)
New high-voltage charger holder

3

Position and lock coolant lines on new high-voltage
charger, then remove previously installed hose clamps.
⇒ Lock coolant lines

4

Position high-voltage charger at mounting points and
attach and tighten new nuts for high-voltage charger
Þ Install high-voltage charger -1-.
holders ⇒

Lock coolant lines
Tightening torque 8 Nm (5.9 ftlb.)
5

Þ Ground line -1- for equipotential
Thread-in screw ⇒
bonding line and tighten.

Install high-voltage charger

AfterSales

Apr 2, 2026
Page 13 of 17

2

Service

Technical Information

ENU 240/24

2797

Tightening torque 8 Nm (5.9 ftlb.)
6

Position fuse box for front end at the partition and
tighten to specification.
⇒ Workshop Manual '978409 Loosening and securing
front end fuse box'

7

Position electric passenger compartment heater at the
partition and tighten to specification.
⇒ Workshop Manual '828019 Removing and installing
electric passenger compartment heater'

8

Position coolant expansion tank at the partition and
tighten to specification.
⇒ Workshop Manual '194019 Removing and reinstalling reservoir'

Ground line

Follow-up actions
NOTICE
Voltage drop
•

Destruction of control unit

•

Damage to control unit

•

Error entries in control unit

•

Control unit coding aborted

•

Malfunctions in the control unit, even during programming

Þ
⇒

Switch off the ignition and remove ignition key before disconnecting the control unit.

Þ
⇒

Make sure that the power supply is not interrupted during programming.

Þ
⇒

Connect a battery charger with a current rating of at least 90 A to the vehicle battery.
NOTICE

Note on installation check
•

The installation check can be ignored at this moment in time. The 11kW OBC charger is only used after PR no. change
OK.

Work Procedure: 1
2

Apr 2, 2026
Page 14 of 17

Fill with coolant and bleed the cooling system.

⇒ Workshop Manual '193817 Draining and filling coolant'
Start the high-voltage system and complete the relevant documentation.
⇒ Workshop Manual '2X00IN Isolating high-voltage system from power supply/Starting high-voltage
system'

AfterSales

Service

Technical Information
3
4

240/24 ENU

2797

2

Complete the documentation.

⇒ Workshop Manual '2X00IN Test log: Starting the high-voltage system'
Code / program 11 kW high-voltage charger (OBC).

NOTICE
Control unit programming will be aborted if the Wi-Fi connection is unstable.
•

An unstable Wi-Fi connection can interrupt communication between the PIWIS Tester and the vehicle
communication module (VCI). As a result, control unit programming may be aborted.

Þ
⇒

During control unit programming, always connect the PIWIS Tester to the vehicle communication module
(VCI) via the USB cable.
4.1

Connect P90999 - PIWIS Tester 4 to the vehicle and switch on.

4.2

Switch on ignition AND hazard warning lights on the vehicle.
Information
The PIWIS Tester instructions take precedence since the description may be different with later
Tester releases.
The procedure described here has been structured in general terms. Different text or additional
information may appear on the PIWIS Tester.

4.3

Select the “Diagnostics” menu item on the PIWIS Tester.

4.4

If P90999 - PIWIS Tester 4 is connected correctly, a connection to the vehicle will be established: The “Taycan” series is recognized and an overview of the control unit is created.

4.5

Press •F12“ to go to the control unit search screen.

4.6

•F8“ for additional menu. Question: “Should a VAL be created?” If “Yes”, press •F12“ to
confirm.

4.7

After the VAL has been created, a message may appear that there are still open service actions
for the connected vehicle. You can do this with •F12“. This is followed by the back up documentation of the vehicle and the vehicle integration test.

Information
The function is ONLY available when the Tester is online.
5

Enter the new vehicle equipment in the vehicle data using “PIWIS Online”
5.1

Select the “Vehicle data maintenance with PIWIS-ONLINE” function in the “Additional menu”
menu item.

AfterSales

Apr 2, 2026
Page 15 of 17

2

Service

Technical Information

ENU 240/24

2797

A message appears informing you that the “Actual” (vehicle) data and “Target” (PIWIS Online)
data will be compared.
Press •F12“ to continue.
5.2

Confirm the message “The vehicle data was compared with PIWIS Online. Significant
differences were found” with •F12“.

5.3

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

5.4

Add the coding value "S9K" to the vehicle data on the PR numbers page. 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.

5.5

Look for the “BATTERY CHARGER” option in the “Family” column.
Select the option “KB3” in the “Value” column in the drop-down menu. Press •F12“ to
continue.

5.6

A table containing the coding value and the columns “new value” and “old value” is displayed in
the overview. Press •F8“ to continue.

5.7

Data is then written / saved. The following messages appear one after the other:
•
•
•
•

6

Transfer vehicle data to PIWIS Online.
Write and transfer vehicle data to the vehicle.
Vehicle order was written successfully.
A check was performed in order to check whether control units have to be coded as a result
of the changes that were made.

Code the new vehicle equipment.
6.1

Confirm the table containing a list of control units that must be coded by pressing •F12“.

6.2

Individual data records will be loaded, depending on the number of control units to be coded.
Wait for “Creating backup documentation. Please wait...'' and “Coding was completed
successfully.” information. Press •F12“ to continue.
Repeat the process for other control units if necessary.

6.3

Wait for the “Adaptation of the control units is complete.” and check the coding status of the
control units in the displayed table.
Continue by pressing •F12“ to return to the control unit overview.

7
8

Apr 2, 2026
Page 16 of 17

Re-program high-voltage charger.

⇒ Workshop Manual '279755 Replacing high-voltage charger'
Check the customer-specific setting of the “Plug & Charge” setting as read out under Preparatory work,
Step 1. Restore any other timers and charging profile settings if necessary.

AfterSales

Service

Technical Information

240/24 ENU

2797

2

NOTICE
Note on Plug & Charge
•

If the Plug & Charge display for Step 1 does not appear in the PCM, please reset the PCM to the factory settings with
step 9. If step 8 is successful, skip step 9 and continue to step 10.
9

Resetting the PCM to factory settings.
9.1

Select the "Central computer" control unit in the control unit selection screen (Overview menu)
and call up the "Maintenance/repairs" area.

9.2

Select the "Reset factory settings" function and follow the instructions on the screen.

10 Read out the fault memory of all systems, work through any existing faults, and erase the fault memory.

Labor position and PCSS encryption
Labor position:
APOS

Labor operation

I No.

27975543

Replace high-voltage charger (OBC) (2WD)

27975545

Replace high-voltage charger (OBC) (AWD)

27975541

Replace high-voltage charger (OBC) and charging
socket on the right (2WD)

27975542

Replace high-voltage charger (OBC) and charging
socket on the right (AWD)

27975544

Replace high-voltage charger (OBC) and charging
socket on the right and left (2WD)

27975546

Replace high-voltage charger (OBC) and charging
socket on the right and left (AWD)
PCSS encryption:

Location (FES5)

27970

High-voltage charger

Damage type (SA4)

1611

does not function

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.

AfterSales

Apr 2, 2026
Page 17 of 17