5

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

Preparatory work - Cayenne (9YA/9YB)
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.

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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

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 battery'

2

Place driver's key in emergency start tray.

3

Connect 9900 - PIWIS Tester 3 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 the ignition.

5

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

Emergency start tray

Deleting navigation database and performing SD map update - 911 (992), Cayenne (9YA/9YB),
Macan (95B)
Information
The procedure described here is based on the PIWIS Tester 3 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:

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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 with •F12“ to continue.

2

Select the 'Drive links/checks' menu and confirm with •F12“ to continue.

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169/21 ENU

3

Select 'Drive links' and confirm with •F12“ to continue.

4

Select 'Format navigation database' and confirm with •F12“ to continue.

5

Read instructions and confirm with •F12“ to continue.

6

Start the routine with •F8“.
Once the navigation database has been formatted, continue with  Step 7.

7

Establish bus idle.

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9

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 the 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 an SD card.  Workshop Manual '915225 Programming navigation
update on central computer'.

Concluding work - 911(992), Cayenne (9YA/9YB)
Work Procedure: 1
2

Switch off ignition.
Disconnect 9900 - PIWIS Tester 3 from the vehicle.

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3

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

4

Switch off and disconnect the battery charger.

Concluding work - Macan (95B)
Work Procedure: 1

Switch off ignition.

2

Disconnect 9900 - PIWIS Tester 3 from the vehicle.

3

Disconnect the battery charger.

4

On vehicles with "Porsche Entry & Drive", replace the original driver's key in the ignition lock with the
control unit again.

Invoicing - 911 (992), Macan (95B)
Invoicing:

For documentation and warranty invoicing, enter the labor operation and PCSS coding specified below in
the warranty claim:

APOS

Labor operation

99412501

Programming Navigation Services

I No.

PCSS coding:
Location (FES5)

9941E

Online Map Update

Damage type (SA4)

1614

Function not as specified

References:

 Workshop Manual '270689 Charging vehicle electrical system battery'
 Workshop Manual '915225 Programming navigation update on central computer'

Invoicing - Cayenne (9YA/9YB)
Invoicing:

For documentation and warranty invoicing, enter the labor operation and PCSS coding specified below in
the warranty claim:

APOS

Labor operation

99412501

Programming Navigation Services

I No.

PCSS coding:
Location (FES5)

9941E

Online Map Update

Damage type (SA4)

1614

Function not as specified

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Technical Information
References:

169/21 ENU

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9

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

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.

© 2021 Porsche Cars North America, Inc.

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