No. 39-21

Service
Technical Information
39/21
ENU
9152
9
Complaint - Various Software Errors: Re-Programming Central Computer (PCM) Using SD
Card (39/21)
Vehicle Type:
Macan (95B)/Macan S (95B)
Model Year:
2019
Concerns:
Central computer (PCM 5.1)
Information:
Optimized software is available for the Porsche Communication Management (PCM) system.
The following optimizations will be implemented after programming:
•
•
•
"Avoid vignette" function does not function after parking the vehicle
"Sport Chrono" function is more robust
Fan noise from central computer (PCM)
Action required: In the event of a customer complaint, re-program the central computer using an SD card.
Information
The total time required for control unit programming is approx. 40 minutes.
Software:
Control unit
SW (old)
SW (new)
Vehicle assignment
Central computer
2478 or 2491
9830
ER1/ER2/ER3/ER4
Central computer
2478 or 2491
9831
ER5/ER6/ER7/ER8
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Required tools and parts
Parts Info:
Information
The PCM update is performed using a SD memory card. You can create the SD card yourself.
To do this, download the software using the SD card tool PiUS (Porsche integrated Update Service) and
install it on a blank SD card.
To use PiUS you can order blank 16GB SD cards with the part number 000 721 990 WW 999.
Pay particular attention to the following:
•
Choose the part number that corresponds to the M-no. (ER1 – ER8) in the table.
•
For using the software tool, one blank or re-writable SD card is required for each software.
•
The software available in PiUS must only be used in accordance with the instructions provided in a
Technical Information (TI) published for this purpose.
The software (SD cards) mentioned here must only be used on vehicles with the (old) software 2478 or
2491.
Damage to the control unit cannot be ruled out if the SD cards are used on other vehicles.
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".
Information
If you are unable to download the software using the SD card tool PiUS (Porsche integrated Update
Service) and install it on a blank SD card, the specified SD memory card below can be ordered.
The SD memory card for the PCM update must be re-used as part of the workshop equipment
and remains at the Porsche dealer. The SD memory card must not therefore be left in the vehicle or
handed over to the customer.
Tools:
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Part No.
Designation
Vehicle assignment
Software
95B919360C
SD card
M-no. ER3 (NAR)
9830
•
Battery charger with a current rating of at least 90 A and, if required, also with a current and
voltage-controlled charge map for lithium starter batteries, e.g. VAS 5908 battery charger
90A
•
9900 - PIWIS Tester 3 with PIWIS Tester software version 40.000.010 (or higher) installed
•
SD memory cards for PCM update
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Preparatory work
NOTICE
Fault entry in the fault memory and control unit programming aborted due to low voltage.
•
Increased power consumption during diagnosis can cause a drop in voltage, which can result in one or
more fault entries and abortion of 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 programming will be aborted if the WLAN 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.
Information
The procedure described here is based on the PIWIS Tester 3 software version 39.900.015.
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.
1
Connect a battery charger with a current rating of at least 90 A, e.g. battery charger 90A, to the
jump-start terminals in the engine compartment and switch it on.
2
Switch on the ignition using the original driver's key.
For vehicles with "Porsche Entry & Drive", do this by replacing the component in the ignition lock with
the original vehicle key if necessary.
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 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.
6
Read out the fault memory of the PCM and delete it if necessary.
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Programming central computer (PCM)
NOTICE
Using the SD cards on vehicles that are not assigned to this TI
•
Risk of damage to control unit

Use the specified SD cards only for the vehicles assigned to the TI.
Work Procedure: 1
Insert SD card for the PCM update into the SD card slot.
Information
If the software update is interrupted or if error messages are displayed (e.g. as a result of read errors),
the update must be repeated.
2
Start the PCM software update using the PIWIS Tester.
2.1
Select the PCM control unit in the control unit selection screen ('Overview' menu) and press
•F12“ ('Next') to confirm your selection.
2.2
Once the PCM control unit has been found and is displayed in the 'Overview', select the
'Maintenance/repairs' menu.
Installing PCM software update
2.3
Select the 'Install software update' function and press •F12“ ('Next') to perform the
software update  Installing PCM software update.
2.4
Confirm the information that is displayed by pressing •F12“ ('Next').
2.5
After meeting the preconditions, confirm by ticking the 'Status' column. Then, press •F12“
('Next') to continue.
Entering PCM programming code
2.6
Enter the programming code N9S7H in the relevant column  Entering PCM programming
code and press •F12“ ('Next') to confirm  Entering PCM programming code.
2.7
Press •F8“ ('Start') to start.
2.8
After checking the software data, press •F8“ ('Start') to start programming.
The time required for the update depends on the respective vehicle equipment and
can be up to 40 minutes.
The PCM is restarted several times during the update.
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Once the update is complete, an overview is displayed showing processes that have been
completed successfully marked with a tick in the Status box. Press •F12“ ('Next') to
confirm.
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Software version programmed during this campaign:
ER1 – ER4: 9830
ER5 – ER8: 9831
•
•
Following control unit programming, the software version can be read out of the PCM control unit in the
'Extended identifications' menu using the PIWIS Tester.
3
Remove inserted SD card from the SD card slot.
Concluding work
1
Carry out general subsequent work for control unit programming as described in  Workshop
Manual '9X00IN Basic instructions and procedure for control unit programming' under  Workshop
Manual '9X00IN General subsequent work'.
Invoicing
For documentation and warranty invoicing, enter the labor operations and PQIS coding specified below in
the warranty claim:
APOS
Labour operation
91522590
Programming central computer
I No.
PQIS coding:
Location (FES5)
91520
Central computer
Damage type (SA4)
1612
Does not function in some cases
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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