Service

Technical Information

169/21 ENU

9941

9

OTA Map Update Failed / Navigation Map View in the PCM Screen Black/Incomplete
(169/21)

Change
Overview:

Version

Date

Change

0

11/24/2021

•

First publication

1

05/01/2024

•

Update of damage type

Model Year:

As of 2018 up to 2021

Model Line:

Cayenne (9YA/9YB)

Concerns:

Porsche Communication Management (PCM 5.0)

Cause:

The customer complains about the message ‘Fault during map update’ and/or a black/incomplete
display of the navigation map in the PCM screen after or during the online map update. The following
complaints can occur:
•
•
•

The online map update can be downloaded, but the installation is then cancelled.
The online map update can be downloaded, and the installation is carried out, but the map data are
then corrupt.
Road data is missing in some map regions.

In these cases of complaints, the navigation map section is then black/incomplete in the PCM screen or
displays the ‘Fault during map update’ message. A new map update via OTA or SD card is not possible.
Action:

Delete navigation database with the PIWIS Tester and installed PIWIS Tester test software release
40.650.030 (or higher) and then perform an SD card update.

Required tools
Tools:
Information
The Cayenne is equipped as standard with a lithium starter battery, which must only be charged using
suitable battery chargers.
For further information about the battery chargers to be used, see the relevant Workshop Manual. 
Workshop Manual '2706IN General information on the 12-volt lithium-ion battery' and  Workshop
Manual '270689 Charging vehicle electrical system battery'
•
•

Battery charger with a current rating of at least 90 A and a current and voltage-controlled
charge map for lithium starter batteries, e.g. battery charger 90A.
P90999 - PIWIS Tester 4 with PIWIS Tester test software release 40.650.030 (or higher) installed

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9

Service
9941

Technical Information

ENU 169/21

Preliminary work
NOTICE
Fault entry in the fault memory and/or control unit coding aborted due to undervoltage.
•

Increased power consumption during diagnosis can cause a drop in voltage, which can result in one or
more fault entries and cancel the diagnostic process.



Before starting control unit diagnosis, connect a suitable battery charger with a current rating of at least
90 A to the vehicle.
NOTICE

Control unit coding will be aborted if the WiFi connection is unstable.
•

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



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

Control unit coding will be aborted if the driver's key is not recognized
•

If the driver's key is not recognized in the vehicle, coding cannot be started or will be interrupted.



Place the driver's key with the back facing down in the area in front of the storage compartment under
the armrest (emergency start tray) in order to guarantee a permanent radio link between the vehicle and
driver's key.

Work Procedure: 1

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Connect a suitable battery charger with a current rating of at least 90 A, e.g. battery charger
90A, to the jump-start terminals in the luggage compartment and switch it on.  Workshop Manual
'270689 Charging vehicle electrical system and battery'

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Technical Information

169/21 ENU

2

Place driver’s key in emergency start tray.

3

P90999 - Connect PIWIS Tester 4 to the vehicle
communication module (VCI) via the USB cable.
Then connect the communication module to the
vehicle and switch on the PIWIS Tester.

4

Switch on ignition.

5

On the PIWIS Tester start screen, call up the ‘Diagnostics’ application.
The vehicle type is then scanned, the diagnostic application is started and the control unit selection screen
is populated.

9941

9

Emergency start tray

Delete navigation database and perform SD card update
Information
The procedure described here is based on the PIWIS Tester 4 software version 40.650.030.
The PIWIS Tester instructions take precedence and in the event of a discrepancy, these are the
instructions that must be followed.
A discrepancy may arise with later software versions for example.
Work
Procedure:

Information
When the routine is performed, the navigation database is deleted in the central computer of the PCM.
Before performing the measure, it is important therefore to ensure that a current country-specific navigation map update is available for the vehicle, which can be used to restore the navigation database.
1

Select the ‘Central computer (PCM)’ control unit and confirm by pressing •F12“.

2

Select menu ‘Control element checks’ and confirm by pressing •F12“.

3

Select Drive links and press •F12“ Next to confirm.

4

Select ‘Formatting navigation database’ and confirm by pressing •F12“.

5

Read the instructions and confirm by pressing •F12“.

6

Start the routine with •F8“.
After formatting the navigation database, continue with  Point 7.

7

Establish bus idle.

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9941

7.1

Switch off ignition.

7.2

Disconnect the PIWIS Tester diagnostic connector from the diagnostic socket.

7.3

Lock the vehicle using the driver’s key and remove the driver’s key from the proximity of
the vehicle (approx. 10 meter/ 32.8 ft).

7.4

Wait approx. 45 minutes before unlocking the vehicle again.
Information
The bus idle can take up to 45 minutes depending on vehicle type and equipment and is
required in order to restart the PCM. This is absolutely essential so that the navigation
data can then be installed correctly.
If the bus idle is not observed or if the PCM does not restart, the map data will not be
installed correctly. In this case, the procedure must be performed again.
A PCM restart is indicated by the Porsche Crest appearing on the PCM display when
the PCM starts up after switching on the ignition.
In rare cases, despite a bus idle of more than 45 minutes, the Porsche Crest is not displayed
when the PCM is started. If this is the case, remove the PCM fuse and wait 1 minute before
re-inserting it. Then check again whether the Porsche Crest is displayed when the PCM is
started.

8

7.5

Switch on ignition.

7.6

Plug the PIWIS Tester diagnostic connector into the diagnostic socket again and restore
communication with the vehicle.

Install the navigation data using the SD card.  Workshop Manual '915225 Program navigation
update on central computer PCM'.

Follow-up actions
Work Procedure: 1

Switch off ignition.

2

Disconnect P90999 - PIWIS Tester 4 from the vehicle.

3

Remove the driver’s key from the emergency start tray.

4

Switch off and disconnect the battery charger.

Invoicing
Invoicing:

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For documentation and warranty invoicing, enter the working position and PCSS encryption specified
below in the warranty claim:

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Service

Technical Information

169/21 ENU

9941

9

I No.

APOS

Labor operation

99412501

Programming Navigation Services
PCSS encryption:

Location (FES5)

9941E

Online map update

Damage type (SA4)

1611

without function

References:

 Workshop Manual '2706IN General information on the 12-volt lithium-ion battery'
 Workshop Manual '270689 Charging vehicle electrical system and battery'
 Workshop Manual '915225 Programming navigation update on central computer PCM'

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.

© 2024 Porsche Cars North America, Inc.

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