Service

Technical Information

08/24

ENU

WRA8

4

WRA8 - Re-Programming Control Unit for Chassis Control (PASM) (Workshop Campaign)

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.

Model Year:

As of 2024 up to 2025

Model Line:

Cayenne (9YA / 9YB)

Concerns:

Control unit for chassis control (PASM)

Cause:

Due to a software error in the control unit for chassis control, it is possible that the start routine
of the control unit will not be completed when the ignition is switched on.
As a result, communication with the control unit for chassis control is disrupted until the ignition is
switched off and on again. The control unit cannot then be accessed for diagnosis either.

Action:

Re-program the control unit for chassis control (PASM) with the latest PIWIS Tester software release.
Minimum requirement: Release 42.500.000

Affected
Vehicles:

Only vehicles assigned to the campaign (see also PCSS Vehicle Information).

Required tools
Tools:

•
•

Battery charger with a current rating of at least 90 A, e.g., VAS 5908 - battery charger 90 A
P90999 - PIWIS Tester 4

Re-programming control unit for chassis control (PASM)
Work Procedure: 1

The prerequisites for control unit programming are described in the Workshop Manual  Workshop
Manual '9X00IN Basic Instructions and Procedure for Control Unit Programming Using the PIWIS
Tester'.

2

After the backup documentation process, the integration test is started automatically. The result
must first be ignored.

3

Re-program the control unit for chassis control (PASM).

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Service
WRA8

ENU

Technical Information

08/24

Required PIWIS Tester software release:

42.500.000 (or higher)

Type of control unit programming:

Control unit programming using the “Automatic
programming” function of the control unit for
chassis control (PASM).

Programming sequence:

Read and follow the information and
instructions on the PIWIS Tester during the
guided programming sequence.
Do not interrupt programming and coding.
A backup documentation process for the
re-programmed software releases starts as
soon as programming and coding is complete.

4

Programming time (up to):

8 minutes

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

 Workshop Manual '9X00IN Basic instructions

Procedure in the event of a termination in the
control unit programming:

Repeat control unit programming by restarting
programming.

and procedure for control unit programming
using the PIWIS Tester'

Read out fault memory. If necessary, work through existing faults and delete them.
Information
If control units are found to have faults that are not caused by control unit programming, these
must first be found and corrected. This work cannot be invoiced under the workshop campaign
number.

5

Press •F3“ to start the integration test in the control unit selection.
All affected control units should now be successfully re-programmed or checked in the control unit
overview and their status.
Information
If a deviation in the integration test is still indicated despite programming being carried out, this must
be repeated. If the deviation persists, contact Technical Support.

Apr 8, 2024
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6

End the diagnostic application. Switch off ignition. Disconnect Tester from vehicle.

7

Switch off and disconnect the battery charger.

8

Enter the campaign in the Warranty and Maintenance logbook.

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Service

Technical Information

08/24

ENU

WRA8

4

Software overview for chassis control unit (PASM)
Software
Overview:

Type

Equipment

Model year

Software part
number

Software
release

Cayenne (9YA /
9YB)

Adaptive air suspension
(M-No. 1BK)

2024 to 2025

9Y0907727R

0930 (or
higher)

Cayenne (9YA /
9YB)

Porsche Active Suspension
Management (PASM) and steel
suspension (M-No. 1BH)

2024 to 2025

9Y0907777R

0930 (or
higher)

Warranty processing
Information
The specified labor time was determined specifically for carrying out this campaign and includes all
necessary preliminary and subsequent work. The labor time may differ from the labor time published in
the Labor Operation List in the PCSS.
Scope 1:

Re-programming control unit for chassis control (PASM)
Labor time:
Re-programming control unit for chassis control (PASM)
Includes:
Connecting and disconnecting battery charger
Connecting and disconnecting PIWIS Tester
Reading out and deleting fault memories

Labor time: 39 TU

Invoicing:  Damage number WRA8 66 000, repair code 1

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.

© 2024 Porsche Cars North America, Inc.

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