No. 26-22

Service
Technical Information
26/22
ENU
8710
8
Seat Heating can be Operated Using the Empty Area of the Coded Seat Ventilation Button:
Re-Programming Air-Conditioning Control Unit (26/22)
Model Line:
Macan (95B)
Model Year:
2022
Equipment:
Seat heating for front and rear seats (M-No. 4A4)
Without seat ventilation/massage seats (M-No. 4D0)
Concerns:
Air-conditioning control unit
Information:
In vehicles with coded seat ventilation, the seat heating can be operated incorrectly using the empty area
of the coded seat ventilation button on the center console touch panel. The seat heating can therefore be
operated using the seat heating button and the empty area of the coded seat ventilation button.
This is caused by incorrect paremeterization of the operator control logic of the air-conditioning system’s
operator control unit.
Action required: In the event of a complaint, re-program the control unit for the air-conditioning system using the PIWIS
Tester with PIWIS Tester software version 40.800.010 (or higher) installed.
Information
The total time required for control unit programming is approx. 4 minutes.
Software:
Overview of the software versions
Control unit
Software version (old
version)
Software version (new
version)
0730
Air-conditioning system
0750
0752
0751
Required tools
Tool:
•
•
9900 - PIWIS Tester 3 with PIWIS Tester software version 40.800.010 (or higher) installed.
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'
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Service
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Technical Information
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Preparatory work
NOTICE
Fault entry in the fault memory and control unit programming aborted due to undervoltage.
•
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 getting started, 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
•
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
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"'.
Re-programming control unit for air-conditioning system
NOTICE
Use of a PIWIS Tester software version that is older than the prescribed version
•
Measure is ineffective

Always use the prescribed version or a higher version of the PIWIS Tester software for control unit
programming and coding.
Work Procedure: 1
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The basic procedure for programming a control unit is described in the Workshop Manual 
Workshop Manual '9X00IN Basic instructions and procedure for control unit programming using the
PIWIS Tester - section on “Programming”'.
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Service
Technical Information
26/22
ENU
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8
Specific information on control unit programming in the context of this Technical Information:
Required PIWIS Tester software version:
40.800.010 (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:
F4M3T
Programming sequence:
Read and follow the information and instructions
on the PIWIS Tester during the guided programming
sequence.
During the programming sequence, the control unit
for the air-conditioning system is re-programmed
and then automaticallyre-coded.
Do not interrupt programming and coding.
Once the control units have been programmed and
coded, you will be prompted to switch the ignition off
and then back on again after a certain waiting time.
Backup documentation of the new software versions is
then performed.
Programming time (approx):
4 minutes
Data record (software part number and
software version) programmed for the
control unit for the air-conditioning system
during programming:
0752
Following control unit programming, the software
version can be read out in the  'Extended identifications' menu from the control unit for the air-conditioning system using the PIWIS Tester.
The software part number and software version of the
programmed data record are based on the specified
PIWIS Tester software version. Please note that this
may be different in a higher version.
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Technical Information
26/22
Procedure in the event of abnormal termination of control unit programming:
•
•
•
Procedure in the event of error messages
appearing during the programming
sequence:
Switch ignition off and then on again.
Read out and erase fault memories.  Workshop
Manual '9X00IN Basic instructions and procedure
for control unit programming using the PIWIS
Tester - section on "Rework"'
Repeat control unit programming by restarting
programming.
 Workshop Manual '9X00IN Basic instructions and
procedure for control unit programming using the
PIWIS Tester - section on “Troubleshooting”'.
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 warranty invoicing, enter the working position and PCSS encryption specified
below in the warranty claim:
APOS
Labor operation
87102500
Programming air-conditioning switch
I No.
PCSS encryption:
Location (FES5)
87100
Air-conditioning
Damage type (SA4)
1614
function switch not as specified
References:
 Workshop Manual '270689 Charging vehicle electrical system battery'
 Workshop Manual '9X00IN Basic instructions and procedure for control unit programming'
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.
Mar 30, 2022
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