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WKC6 - Re-programming Air-conditioning Control Unit and Various Other Control Units
(Workshop Campaign)
Model Line:

Cayenne (9YA)

Model Year:

2019

Subject:

Re-programming air-conditioning control unit and various other control units

Important:

CRITICAL WARNING - This campaign includes steps where control unit(s) in the vehicle will be
programmed with the PIWIS Tester. The vehicle voltage must be maintained between 13.5 volts and 14.5
volts during this programming. Failure to maintain this voltage could result in damaged control unit(s).
Damage caused by inadequate voltage during programming is not a warrantable defect. The technician
must verify the actual vehicle voltage in the PIWIS Tester before starting the campaign and also document
the actual voltage on the repair order.

Information:

Due to incorrect servo motor control, the air-conditioning system flaps on the affected vehicles
may not be moved to the required positions at times.
If this happens, the temperature distribution and air distribution in the interior of the vehicles can differ
from the selected settings.
To prevent this from happening, the air-conditioning control unit must be re-programmed with an updated
data record.
The software of other control units will also be updated at the same time*. This software update contains
improvements, for example, for the systems
•
•
•

Driver assistance
Instrument cluster
Chassis control

* You will find an overview of the problems and symptoms that will also be corrected with the software
update in the attachment under  Technical Information 'Overview of problems and symptoms that will
be corrected with the software update'.
Action
Required:

•
•
•

Update software of the affected control units using the PIWIS Tester or SD card. For details of
affected control units, see overview below.
Update Onboard Owner’s Manual
Replace Owner’s Manual in the on-board folder in the vehicle with an updated version
Programming time

Control unit
Assistance systems (bootloader)*

Update via
SD card

PIWIS Tester

approx. 8 minutes

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Assistance systems (application
software)
Variant A or A0

up to 100 minutes**

Variant B or C

up to 30 minutes**

PCM 5.0**

approx. 40 minutes

Combined software update of various
control units

up to 40 minutes*

Includes:
– Brake electronics (PSM incl.
parking brake)
– Chassis control (PASM)
– Lane Change Assist, left and
right**
– Radar sensor for front corner
radar, left and right**
– Roll stabilization (PDCC)**
– Air-conditioning system
Instrument cluster*

approx. 60 minutes

* Depending on the software version of the relevant control unit
** Depending on equipment

Information
Important points that must be observed before carrying out the software update:

Affected
Vehicles:

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•

Set the battery charger to a charge voltage of 14.8 V

•

Set the maximum charging time of the battery charger to at least 7 hours

•

Place driver's key in emergency start tray

•

Read and follow instructions for carrying out programming

•

Operate the PIWIS Tester using the power supply unit/docking station

Only the vehicles assigned to the campaign (see also PIWIS Vehicle Information). This campaign affects
6,344 vehicles in North America.

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Information
To make warranty processing easier, each vehicle is assigned one campaign scope. The assignment is
based on the data available for the respective vehicle relating to the software versions installed on the
control units.
Irrespective of the assigned campaign scope, all steps described in the Technical Information must be
carried out in order to ensure that all affected control units have the required software version after
carrying out the campaign.
Exception: Steps that are required only for certain vehicle models must be carried out only on this
vehicle.

Parts required
Parts Info:

Owner’s Manual
An overview of the required Owner’s Manuals is provided under  Technical Information 'Overview of
order numbers for Driver's Manuals'.

Required tools
Information
A blank or re-writable SD memory card is required for installing the Onboard Owner’s Manual.
The Porsche dealers were provided with a blank SD memory card for installing the Onboard
Owner’s Manual during the market launch of the Panamera. The SD memory card must be
re-used as part of the workshop equipment and remain in the Porsche dealership.
The SD memory card therefore must not be left in the vehicle or handed over to the customer.
If there is no SD memory card available for carrying out this campaign, a replacement SD memory card
must be purchased from the PET or on the open market. The costs for the SD memory card cannot be
invoiced under the workshop campaign number.
Tools:

•
•
•

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. VAS 5908 - Battery charger 90A
9900 - PIWIS Tester 3 with PIWIS Tester test software version 38.400.020 (or higher) installed
SD memory cards (for PCM and assistance systems update)

Information
The assistance systems update is performed using an equipment-dependent SD memory card and
the PCM update is performed using a specific SD memory card for the region. The SD memory
cards for the assistance systems update and the PCM update must be re-used as part of the workshop
equipment and remain in the Porsche dealership. The SD memory cards must not therefore be left
in the vehicle or handed over to the customer.

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Alternatively, if PiUS is not used, SD cards can be obtained from the spare parts system. The
following specifications apply here:
Blank SD memory card for installing Onboard Owner’s Manual, e.g. 000721990WW999
Blank SD card

•

Overview of SD memory cards
Part No.

Designation

Vehicle assignment

9Y0919866B

SD memory card for assistance systems
update

Assistance systems variant B

9Y0919866A

SD memory card for assistance systems
update

Assistance systems variant C

9Y0919360D

SD memory card for PCM update

I-no. ER3 (North America)

Information
From now on, you can also create the SD cards mentioned in this campaign yourself.
To do this, download the software for the required SD card using the SD card tool PiUS (Porsche integrated Update Service) and install it on a blank SD card.
Pay particular attention to the following:
•

The name of the software in PiUS corresponds to the respective part number of the SD card.

•

For using the software tool, one blank or re-writable SD card is required for each individual software.

•

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

The software (SD cards) mentioned here must only be used on the vehicles assigned to the
campaign. An exception to this can only be granted via another Technical Information.
You will find further information on how to install and use the PiUS software tool in the PPN under "PiUS
(Porsche integrated Update Service) goes live" (PPN portal  Dr. Ing. h.c. F. Porsche AG 
Aftersales  Workshop  PIWIS  Blog  2018  June  21).

Preparatory work
NOTICE
Abnormal termination of control unit programming
•

Increased current draw during programming can cause a drop in voltage, which can result in the
abnormal termination of the programming process.

•

Due to the long programming time, the charging process can end prematurely, resulting in the abnormal
termination of the programming process, if a sufficiently long charging time is not set for the battery
charger.

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

Before starting control unit programming, connect a suitable battery charger set to a charging voltage of
14.8 V and a charging current of at least 90 A to the vehicle.



Set a maximum charging time of at least 7 hours in the battery charger menu if possible before starting
control unit programming.



Route the line between the PIWIS Tester and the vehicle communication module (VCI) without tension to
prevent the line from slipping out.



Make sure that the connectors are inserted fully into the PIWIS Tester and into the diagnostic socket.



Connect the PIWIS Tester to the power supply unit.
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 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 diagnosis will be aborted if the driver's key is not recognized
•

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



Position the driver's key in the rear area of the left cupholder in the center console between the holding
struts (emergency start tray) in order to guarantee a permanent radio link between the vehicle and
driver's key.

Information
The new 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:
•

 Workshop Manual '2706IN General information on the 12-volt lithium-ion battery'

•

 Workshop Manual '270689 Charging vehicle electrical system battery'
Information

Work Procedure: 1

Connect a battery charger that is suitable for lithium starter batteries with a current rating of
at least 90 A (e.g. VAS 5908 - Battery charger 90A) to the jump-start terminals in the engine
compartment.
For instructions, see  Workshop Manual '2706IN External power connection, jump-lead starting'.

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Pay particular attention to the following points:
•
•

Set the charging voltage to 14.8 V.
Set a maximum charging time of at least 7 hours

2

Position the driver's key in the rear area of the left
cupholder in the center console between the holding
struts (emergency start tray) in order to guarantee a
permanent radio link between the vehicle and driver's
key  Emergency start tray.

3

Switch on the ignition.

4

9900 - PIWIS Tester 3 must be connected to the
vehicle communication module (VCI) via the cable.
Then connect the communication module to the
vehicle and switch on the PIWIS Tester.
Due to the long programming time, the PIWIS Tester
must be operated via the power supply unit.

Emergency start tray

5

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

6

Create vehicle analysis log (VAL) using the PIWIS Tester.
Mark the vehicle analysis log you have just created with the attribute "Initial VAL" and after carrying
out the campaign, return it using the PIWIS Tester.

7

Read out fault memory.
Information
If there are faults in the control units, these must first be found and corrected. This work cannot
be invoiced under the workshop campaign number.

Reading out software version installed in the vehicle and assistance system variant
Work Procedure: 1

2

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Select the Assistance systems control unit in the control unit selection screen ('Overview' menu)
and confirm your selection by pressing •F12“ ('Next').
Once the control unit for assistance systems has been found and is displayed in the 'Overview',
select the 'Extended identifications' menu.

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3

Read out the value in the 'Identification' column under
'Software version' and under 'System' and write it
down  Assistance system variant.

4

Depending on the software version that was read out,
go to the next step as described below.
•

WKC6

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Software version isless than 0290:

Continue with Step 5 and re-program the bootloader
of the control unit for assistance systems first.
•

ENU

Assistance system variant

Software version is 0291: There is no need to program the control unit for assistance
systems. Subsequent procedure:

- Vehicles without I-no. ER3 (North America): Continue with  Technical Information '2706IN
Vehicles with I-no. ER3: Re-programming Porsche Communication Management (PCM)'.
- Vehicles with I-no. ER3 (North America): Continue with  Technical Information '2706IN
Performing software update of various control units'.
•

Software version is 0290and system is "zFAS Var A" or"zFAS Var A0":

Continue with  Technical Information '2706IN Re-programming control units for assistance
systems - variant A'.