Service

Technical Information

80/22

ENU

9152

9

Various PCM Central Computer Fault Corrections: Re-Programming PCM Main Computer
(80/22)
Revision:

This bulletin replaces bulletin Group 9 80/22, dated August 2, 2022.

Model Line:

Panamera (971)

Model Year:

2021

Concerns:

Porsche Communication Management (PCM)

Information:

Optimized software for the PCM central computer is available to correct the following complaints:
•
•
•
•

Independent restart of the PCM central computer
Black screen in the PCM central computer
Automatic deactivation of PCM central computer
Usability and system stability of PCM central computer

Action required: Re-programming PCM main computer.
Software:

Overview of the software versions affected
Control unit

Software version (new status)

Central computer

2870

Vehicle allocation
ER3 / ER4 / ER5 / ER6 / ER7 /
ER8

Required parts and tools
Parts:
Information
Programming is performed using the specific storage medium.
The storage medium for ECU programming must be reused as part of the workshop equipment
and remains at the Porsche dealer. The storage medium must therefore not remain in the vehicle and
must not be handed over to the customer.
Part No.

Vehicle allocation

Software

9Y0909400D

M No. ER3 (NAR)
M No. ER4 (Mex)

2870

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Information
The storage medium can be even created.
To do this, PiUS (Porsche integtrated update service) software should be downloaded using the storage
media tool unit and installed on a blank storage medium.
Pay particular attention to the following:
•

For the application of the software tool, each software requires an empty or free writable storage
medium.

•

The software available in PiUS must only be used in accordance with the instructions provided in the
Technical Information (TI) published for this purpose.

You will find further information on how to install and use the PiUS software tool in the PPN portal under
"PiUS (Porsche integrated Update Service) goes live".
Tool:

•

•
•

Battery charger with a current rating of at least 90 A, e.g. VAS 5908 battery charger 90A. For
further information about the battery chargers to be used, see the corresponding Workshop Manual.
 Workshop Manual '270689 Charging vehicle electrical system battery'
9900 - PIWIS Tester 3 with PIWIS Tester software version 41.100.010 (or higher) installed
Storage medium with the right software installed.

Preliminary work
NOTICE
Fault entry in the fault memory or control unit programming aborted, as the case may be, due to
under-voltage.
•

Increased current draw during diagnostics or control unit programming can cause a drop in voltage,
which can result in one or more fault entries and the abnormal termination of the programming process.



Before starting work, connect a suitable battery charger with a current rating of at least 90 A to the
jump-start terminals.
NOTICE

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

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



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

Control unit programming will be aborted if the driver’s key is not detected

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•

If the driver’s key is not detected in vehicles with Porsche Entry & Drive, programming cannot be started or
will be interrupted.



Switch on the ignition using the original driver’s key. To do this, replace the control unit in the ignition lock
with the original driver’s key if necessary.

Work Procedure: 1

Place the driver's key with the back facing down
into the front left storage compartment in the center
console (emergency start tray) to guarantee a
continuous radio link between the vehicle and the
driver's key  Emergency start tray.

2

Carry out general preliminary work for control unit
programming as described in  Workshop Manual
'9X00IN Basic instructions and procedure for control
unit programming – section on “Preliminary work”'.

Emergency start tray

Re-programming PCM main computer
Work Procedure: 1

Re-programming PCM main computer.  Workshop Manual '915225 Programming central
computer data update'
Programming code required for programming: T8Q9W
Information
If the software update is interrupted or if error messages are displayed (e.g. as a result of read
errors), the programming must be repeated.

Concluding work
Work Procedure: 1

Carry out general rework for control unit programming as described in  Workshop Manual '9X00IN
Basic instructions and procedure for control unit programming using the PIWIS Tester - section on
“Rework”'.

Invoicing
For documentation and invoicing in the event of a warranty, state the work items required depending on
the scope of work and the specified PCSS encryption in the warranty claim:
APOS

Labor operation

91520103

Check central computer

91522553

Programming central computer

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PCSS encryption:
Location (FES5)

91520

Central computer

Damage type (SA4)

1614

function not as per specification

References:

 Workshop Manual '9X00IN Basic instructions and procedure for control unit programming'
 Workshop Manual '270689 Charging vehicle electrical system battery'

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.

© 2022 Porsche Cars North America, Inc.

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