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9

WKD6 - Re-coding Control Unit for Assistance Systems and Re-programming Various Other
Control Units if Necessary (Workshop Campaign)
Model line:

Cayenne (9YA)

Model Year:

2019

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.

Subject:

Software update of the following control units:
•
•
•
•

Information:

Assistance systems
Chassis control (PASM)
Roll stabilization (PDCC)
PCM 5.0

New software is available for the control units specified below.
The new software will correct the problems described here and implement improvements and function
enhancements:
Component/control unit

Function/symptom

Assistance systems

Description of fault
symptom/improvement
Control unit for assistance
systems is more robust.

Chassis control (PASM)

Messages "Chassis system
fault" and "Chassis system
failure" in the instrument cluster

Sporadic resets of the control
unit due to a timing problem.

Roll stabilization (PDCC)

Message "Chassis system fault"
in the instrument cluster

The PDCC system fails at low
speeds (up to 5 km/h or 3 mph)
due to temporary asynchronous
data processing between the
front and rear axle.

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PCM 5.0

Action
Required:

Message "Chassis system fault"
in the instrument cluster - only
for Hybrid vehicles

Sporadic failure of PDCC
system. The function is
available again after an ignition
reset.

Touch display in the dashboard
freezes

After pressing the individually
programmable button on the
steering wheel, individual parts
of the touch display can no
longer be used in some areas
of North America. The function
is available again after BUS idle.

Re-code control unit for assistance systems and re-program various other control units if necessary
Information
Different tasks are required, depending on the campaign scope assigned to each vehicle. The required
tasks are indicated clearly in the Technical Information.
For details of which campaign scope is assigned to each vehicle, see PCSS Vehicle Information.
Action

Control unit
Assistance systems

Scope
1

2

3

Coding

Chassis control (PASM)

Programming

Roll stabilization (PDCC)*

Programming

PCM 5.0

Programming

* Depending on equipment
Affected
Vehicles:

Only the vehicles assigned to the campaign (see also PCSS Vehicle Information). This campaign affects
6,622 vehicles in North America.

Required tools
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 software version 38.400.020 (or higher) installed
Only for campaign scope 3: SD memory card for PCM update
Overview of SD memory cards (campaign scope 3)

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Part No.

Designation

Vehicle assignment

9Y0919360D

SD memory card for PCM update

I-no. ER3 (North America)

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Preparatory work
NOTICE
Control unit programming or coding is aborted
•

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

•

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



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 and coding.



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 or 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 programming or coding may be aborted.



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

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

If the driver's key is not recognized in the vehicle, control unit programming or coding 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.

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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
Use the new PIWIS Tester data cable to carry out the campaign, if it is already available. The difference
between the old  -1- and new  -2- data cable is shown in the illustration.
If the connection between the vehicle and PIWIS Tester is interrupted, check the data cable for the PIWIS
Tester for signs of damage. If the data cable is damaged, it must be replaced. To do this, follow the
instructions in the PPN for "Returning faulty USB cable caps" (PPN portal > Porsche Cars North America>
Aftersales > Workshop > PIWIS > Documents).
Work Procedure: 1

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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'.

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.

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 "Pre VAL" and after carrying out the campaign, return it using the PIWIS
Tester.

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All vehicles: Re-coding control unit for assistance systems
Work Procedure: 1

Select the 'Assistance systems' control unit in the control unit selection screen ('Overview' menu)
and confirm your selection by pressing •F12“ ('Next').

2

Once the control unit for assistance systems has been found, call up the 'Codings/adaptations'
menu.

3

Select the 'Automatic coding' function and
press •F12“ ('Next') to start control unit coding
 Automatic coding.

4

When coding is complete, the message “Coding has
been completed successfully” is displayed and a
check appears in the 'Status' box.
If coding is not completed successfully (error
message “Coding was not completed successfully”),
coding must be repeated.

5

Once coding is completed successfully, press •F12“ ('Next').

6

Press •F11“ ('Back') to return to the control unit overview.

Automatic coding

Depending on the campaign scope assigned to the vehicle, go to the next step as described below.
•
•

•

For vehicles with campaign scope 1, continue with  Technical Information '2706IN Concluding
work'.
For vehicles with campaign scope 2, continue with  Technical Information '2706IN Vehicles with
campaign scope 2: Performing software update for chassis control (PASM) and roll stabilisation
(PDCC) if necessary'.
For vehicles with campaign scope 3, continue with  Technical Information '2706IN Vehicles with
campaign scope 3: Re-programming PCM 5.0 and other control units if necessary'.

Vehicles with campaign scope 2: Performing software update for chassis control (PASM) and roll
stabilization (PDCC) if necessary
The following control units are re-programmed and then re-coded in the specified sequence:
•
•

Chassis control (PASM)
Roll stabilization (PDCC)*

* Depending on equipment (This is checked automatically by the PIWIS Tester)
WARNING
Automatic lifting and lowering of the vehicle
•

Danger of limbs being trapped when working on the vehicle during the adjustment procedure.

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

The vehicle must stand freely and must not be jacked up.



Do not work on the vehicle.



Stay a safe distance away from the vehicle.
1

For specific information on control unit programming during this campaign, see the table
below:
Required PIWIS Tester software version:

38.400.020 (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:

Y7F6S

Programming sequence:

Read and follow the information and instructions
on the PIWIS Tester during the guided
programming sequence.
Several control units are re-programmed and
re-coded during the programming sequence.
Do not interrupt programming and coding.

Programming time (approx.):

up to 20 minutes*
* The time required for the update depends on the
respective vehicle equipment.

Software versions programmed during this
campaign:

•

Chassis control (PASM)

0918

•

Control unit for roll stabilization
(PDCC)*

0412

Following control unit programming, the software
version can be read out of the relevant control unit in
the 'Extended identifications' menu using the PIWIS
Tester.
Procedure in the event of abnormal
termination of control unit programming:

Repeat control unit programming by entering the
programming code again.
During repeated control unit programming, all
control units that have already been programmed
successfully are automatically skipped and are not
programmed again.

Procedure in the event of error messages
appearing during the programming
sequence:

 Workshop Manual '9X00IN Basic instructions and
procedure for control unit programming using the
PIWIS Tester - section on "Fault finding"'.

When programming is complete, continue with Technical Information '9X00IN Concluding work'.
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Read out the current Porsche Communication Management (PCM) software version.

Work Procedure: 1

2

1.1

Select the PCM 5.0 control unit in the control unit selection screen ('Overview' menu) and
press •F12“ ('Next') to confirm your selection.

1.2

Once the control unit has been found and is displayed in the 'Overview', select the 'Extended
identifications' menu.

1.3

Read out the value in the 'Identification' column under "Software version".
•

If the software version is 2483 and if optional equipment I-no. ER3 is installed, continue
with Step 2.

•

For all other software versions, no PCM 5.0 software update is necessary. In this case,
continue with  Technical Information '9X00IN Re-coding all control units - all vehicles'.