Service

Technical Information

217/24 ENU

ARB8

9

ARB8 – Re-Programming Central Computer (PCM) (Stop Delivery / Recall 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:

Taycan (Y1A/Y1B)

Concerns:

Software update (software network VR11)

Cause:

Due to faulty programming in the central computer (PCM), it is possible in affected vehicles that the
reversing camera will not switch on as per the specifications. As such, under certain circumstances, only
ParkAssist is displayed on the central computer, and the reversing camera is not activated as required.
Further software optimizations are available for various control units for the Taycan. As part of this campaign,
the control units are reprogrammed using the PIWIS Tester to the current VR11 software network
An overview of the new features that will be implemented with the software update can be found in the
appendix under ⇒ Technical Information 'Overview of new features of the software update'.

Actions:

•
•
•
•

Re-program the central computer (PCM) with the updated data record
Re-program the instrument cluster with the latest PIWIS Tester software release
Minimum requirement: Release 42.000.055 (or higher)
Replace Owner's Manual in the on-board folder in the vehicle with an updated version

Checklist:

Due to the high number of programming steps incorrectly carried out as part of the last software update,
a checklist was created to improve the overview of the work to be carried out. The checklist must be
completed, signed and attached to the PQIS quality line in the PCSS.
For checklist, see ⇒ Technical Information 'Checklist'

Affected
Vehicles:

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

Scope 1: Update to software combination VR11 (valid for vehicles in Stop Delivery)
Scope 2: Update to software combination VR11 (valid for vehicles in Recall)

•
•

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

•
•

USB storage medium Type A+C 32 GB (for PCM update)
USB storage medium, Type C (for on-board Owner's Manual update)

Required tools
Tools:

AfterSales

Dec 19, 2024
Page 1 of 18

9

Service

Technical Information

ENU 217/24

ARB8

Re-programming central computer (PCM) other control units
Information
Before starting programming, the battery charger must necessarily be:

Work
Procedure:

•

Switched off and on once; the battery charger display must be off before starting it again because the
battery charger automatically switches to trickle charging after 5 hours (default setting in the charger).

•

Operate in charging mode.

•

The vehicle must be on a level surface.

•

Air suspension must be at the normal level.

•

Switching off air-conditioning system.

•

Vehicles with a PVTS contract must have Service mode activated.

•

An active Internet connection with the PIWIS Tester must be maintained.

•

To log in using the PIWIS Tester, the technician is required.

•

Place the original remote control in the emergency start tray (note the position)!

•

The PIWIS Tester must not be charged using the cigarette lighter!

1

The prerequisites for control unit programming are described in the Workshop Manual ⇒ Workshop
Manual '9X00IN Basic Instructions and Procedure for Control Unit Programming Using the PIWIS
Tester'.

2

After the backup documentation process, the integration test is started automatically. The result is
initially to be ignored.

3

Create Vehicle Analysis Log (VAL) using the PIWIS Tester. Mark the vehicle analysis log you have just
created with the attribute "Pre-VAL" and, after carrying out the campaign, return it using the PIWIS
Tester.

4

Update software for various control units (sequence 1).(Valid for all scopes)
For specific information on control unit programming during this campaign, see the table below.

Information
Please inform the customer that the set values are lost after updating the instrument cluster.

Dec 19, 2024
Page 2 of 18

AfterSales

Service

Technical Information

217/24 ENU

ARB8

9

Required PIWIS Tester software release:

43.000.055 (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:

C1U3B

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.
After programming has been carried out, the result
of the programming must be checked and, in the
event of deviations from individual control units, the
corresponding control unit must be re-programmed
or re-coded.
A backup documentation process for the
re-programmed software releases starts as soon as
programming and coding is complete.

Programming time (up to):

•
•

201 minutes
The duration of the programming the control
units depends on the build status and can differ
from the specified time.

Control units programmed in this campaign:

•

See ⇒ Technical Information '9X00IN Overview
of control units VR11'

Procedure if error messages appear during the
programming sequence:

⇒ Workshop Manual '9X00IN Troubleshooting'.

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

Continue the campaign sequence to the end, then
carry out the integration test again when the test
is complete and start programming from the integration test.
Additional instructions for aborted programming ⇒
Technical Information '9X00IN Additional information
if programming is aborted'

AfterSales

Dec 19, 2024
Page 3 of 18

9

Service

Technical Information

ENU 217/24

ARB8
5

When programming is complete, another backup documentation process, including the integration test,
is performed. The initial result is to be ignored because it sometimes displays control units as being
faulty despite programming.
To check this, the integration test must be restarted on the start page by pressing the •F3“ button.
This process must be repeated up to three times.
If this results in a discrepancy here, the relevant control unit must be re-programmed. The central
computer (PCM) control unit is not to be programmed initially because this is programmed in sequence
2.
Sequence 2 may only be started after successful completion of sequence 1.

6

Select the Guest account from the central display (PCM) and activate Privacy mode (available in some
countries).
Information
If Privacy mode is not active, programming may be aborted, resulting in a fault in the central computer
(PCM). Central computers that are replaced as part of the workshop campaign are checked by Porsche
AG; if private mode was not set in the central computer before starting programming, the costs will be
re-debited.

7

Re-program the central computer (PCM) (sequence 2)
For specific information on control unit programming during this campaign, see the table below.
Preparing USB stick with required software (depending on country version)
Overview of software to be used for central computer (PCM): ⇒ Technical Information '9X00IN
Overview of PCM update'
The battery charger must be switched off and on completely once before sequence 2 due to the
automatic switchover (trickle charging).

Required PIWIS Tester software release:

43.000.055 (or higher)

Type of control unit programming:

In the control unit selection ("Overview" menu),
select the PCM central computer control unit and
select the "Service / Repairs" menu.
Select the "Install software update" function and
press •F12“ ("Next") to perform the software
update.

Programming code:

Dec 19, 2024
Page 4 of 18

C1U4B

AfterSales

Service

Technical Information

217/24 ENU

Programming sequence:

ARB8

9

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 as soon as
programming and coding is complete.

Programming time (up to):

32 minutes

Control unit programmed in this campaign:

•

Procedure if error messages appear during the
programming sequence:

⇒ Workshop Manual '9X00IN Troubleshooting'.

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

Repeat control unit programming by restarting
programming.

See ⇒ Technical Information '9X00IN Overview
of control units VR11'

Additional instructions for aborted programming ⇒
Technical Information '9X00IN Additional information
if programming is aborted'
8

Update the Owner's Manual in the PCM. For more information, see ⇒ Workshop Manual '9X00IN Diagnostic system: Perform vehicle handover' (Installing Onboard Owner's Manual section)
Information
The display of the electronic Owner's Manual can take up to 10 minutes after updating the central
computer. During the test drive, check whether the electronic Owner's Manual are displayed on the
central computer.

9

Carry out PSM position detection, pressing the brake and P-button and shifting the gears from P to R to
N and back to P.

10 Standardize the side windows.
Information
The wheel electronics must be taught during the test drive and must not be carried out by the technician.
11 Remove the PIWIS Tester (VCI) from the vehicle.

AfterSales

Dec 19, 2024
Page 5 of 18

9

Service
ARB8

Technical Information

ENU 217/24

11.1

Lock the vehicle.

11.2

Establish bus idle for at least 5 minutes.

11.3

Re-connect the PIWIS Tester (VCI) after bus idle.

12 Read out all fault memories process and delete existing faults if necessary.
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.
13 Press •F3“ to start the integration test in the control unit selection.
All affected control units should now be successfully re-programmed or checked in the control unit
overview and their status.
Information
If a deviation in the system test is still indicated despite programming being carried out, this must be
repeated. If the deviation persists, contact Technical Support.
14 Create Vehicle Analysis Log (VAL) using the PIWIS Tester.
Mark the Vehicle Analysis Log you have created with the attribute "Post-VAL" and, after carrying out the
campaign, return it using the PIWIS Tester.
15 End the diagnostic application. Switch off the ignition. Disconnect the Tester from the vehicle.
16 Switch off and disconnect the battery charger.
17 Replace the Owner's Manual in the vehicle.
For an overview of the Owner's Manuals, see ⇒ Technical Information '9X00IN Overview of order
numbers for Driver’s Manuals'
Information
The vehicle must only be handed over to the customer using the new Owner's Manual.
18 Attach the completed checklist to the PQIS process line. ⇒ Technical Information '9X00IN Checklist'
19 Enter the campaign in the Warranty and Maintenance Logbook.

Warranty processing
Scope 1:

Dec 19, 2024
Page 6 of 18

Update to software combination VR11 (valid for vehicles in Stop Delivery)

AfterSales

Service

Technical Information

217/24 ENU

ARB8

9

Labor time:
Update software for various control units
Includes:
Connecting and disconnecting battery charger
Connect and disconnect PIWIS Tester
Update various control units to software release VR11
(Sequence 1)
Update software for the central computer (PCM) (sequence 2)
Installing Owner's Manual in PCM
Perform rework in the vehicle
Reading out and deleting fault memories
Replacing Owner's Manual
Creating Vehicle Analysis Log (VALs) before and after
campaign

Labor time: 185 TU

Required materials:
ARB80000001

Owner's Manual*

1 piece

ARB80000002

Shipping costs**

1 piece

* The cost of one Owner's Manual will be covered for each vehicle. For warranty invoicing, enter Part No.
ARB80000001 with the designation "Owner's Manual" as accessories costing $0.01.
** If you incur shipping costs when ordering the Owner's Manual, please invoice these costs under Part No.
ARB80000002, with the designation "Shipping costs" as an additional part. Maximum cost $5.40. Please
document a copy of the invoice for this in the warranty claim.
Þ Damage number ARB8 99 000, repair code 1
Invoicing: ⇒
Scope 2:

Update to software combination VR11 (valid for vehicles in Recall)
Labor time:
Update software for various control units
Includes:
Connecting and disconnecting battery charger
Connect and disconnect PIWIS Tester
Update various control units to software release VR11
(Sequence 1)
Update software for the central computer (PCM) (sequence 2)
Installing Owner's Manual in PCM
Perform rework in the vehicle
Reading out and deleting fault memories
Replacing Owner's Manual

AfterSales

Labor time: 201 TU

Dec 19, 2024
Page 7 of 18

9

Service
ARB8

Technical Information

ENU 217/24

Creating Vehicle Analysis Log (VALs) before and after
campaign
Required materials:
ARB80000001

Owner's Manual*

1 piece

ARB80000002

Shipping costs**

1 piece

* The cost of one Owner's Manual will be covered for each vehicle. For warranty invoicing, enter Part No.
ARB80000001 with the designation "Owner's Manual" as accessories costing $0.01.