Service

Technical Information

127/14 ENU

WE89

3

WE89 - Replacing Control Unit For All-wheel Drive System (Workshop Campaign)

Vehicle Type:

911 Turbo (991)/911 Turbo S (991)

Model Year:

As of 2014 up to 2015

Concerns:

Control unit for all-wheel drive system Porsche Traction Management (PTM)

Information:

This is to inform you of a voluntary Workshop Campaign on the above-mentioned vehicles. The affected
vehicles were fitted with a control unit for the all-wheel drive system in which a purging routine
for the hydraulic pump drive for the multiplate clutch is not activated due to an error in the
control unit software.
This can cause wear particles to clog up the hydraulic pump drive over the service life of the vehicle,
resulting in higher power consumption for the pump drive.
As a result, the all-wheel drive system will be deactivated and the warning message "No all-wheel sys. –
Only rear-wh drive – Adapted driving permitted" will be displayed in the instrument cluster.

Action
Required:

Replace control unit for all-wheel drive system.

Affected
Vehicles:

The VIN(s) can be checked by using PIWIS Vehicle Information link to verify if the campaign affects the
vehicle. This campaign is scope specific to the VIN! Failure to verify in PIWIS may result in an improper
repair. This campaign affects 2,801 vehicles in North America.

Parts Info:

NOTE: PARTS FOR THIS CAMPAIGN WILL BE AUTOMATICALLY ALLOCATED FOR UP TO 50% OF
THE VEHICLES THAT ARE SERVICED AT YOUR DEALERSHIP. ONCE YOUR DEALERSHIP IS OUT
OF STOCK AND REQUIRES ADDITIONAL PARTS, YOU SHOULD SUBMIT A PTEC/PAV.

Tools:

The existing control unit cannot be programmed with the new software.

•
•
•
•

Work
Procedure:

Part No.

Designation

Qty.

000.043.989.82

 All-wheel drive control unit

1 ea.

9818 - PIWIS Tester II
Battery Charger/Power Supply - Suitable for AGM Type batteries, recommended current rating of
70A fixed voltage 13.5V to 14.5V. Refer to Equipment Information EQ-1105.
Torque screwdriver, 1.5 - 3 Nm (1 - 2 ftlb.), e.g. VAS 6494 - Torque screwdriver 1.5 - 3 Nm (1 - 2
ftlb.)
Plastic wedge

See Attachment “A”.

2015© Porsche Cars North America, Inc.

AfterSales

May 26, 2015
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3

Service
WE89

Claim
Submission:

ENU

127/
14

Technical Information

See Attachment “B”:

Attachment "A": Work Procedure
NOTICE
Coding will be aborted in the event of low-voltage.
•

Increased current draw during diagnosis can cause a drop in voltage, which can result in one or more fault
entries and the abnormal termination of the coding process.



Before getting started, connect a suitable battery charger with a current rating of at least 70 A to the
jump-start terminals in the engine compartment.
NOTICE

Coding will be aborted if the WLAN connection is unstable.
•

An unstable WLAN connection can interrupt communication between PIWIS Tester II and the vehicle
communication module (VCI). As a result, coding may be aborted.



During control unit coding, always connect PIWIS Tester II to the vehicle communication module (VCI) via
the USB cable.
1

Replace control unit for all-wheel drive system with a new control unit  Workshop Manual '399555
Replacing control unit for all-wheel drive system (PTM)'.

2

Enter the workshop campaign in the Warranty and Maintenance booklet.

Information
The specified working time was determined specifically for carrying out this campaign and may differ
from the working times published in the Labor Operation List in PIWIS.
Attachment "B": Claim Submission - Workshop Campaign WE89
Warranty claims should be submitted via WWS/PQIS.
Open campaigns may be checked by using either the PIWIS Vehicle Information system or through PQIS
Job Creation.
Labor, parts, and sublet will be automatically inserted when Technician is selected in WWS/PQIS. If
necessary, the required part numbers will need to be manually entered into warranty system by the dealer
administrator.

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2015© Porsche Cars North America, Inc.

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Service

Technical Information

127/14 ENU

WE89

Working time:
Labor time: 34 TU

Replacing control unit for all-wheel drive system
Includes:
Connecting and disconnecting battery charger
Connecting and disconnecting PIWIS Tester
Reading out data from old control unit
Removing and installing control unit for all-wheel drive
system
Writing data to new control unit
Reading out and erasing fault memory
Parts required:
All-wheel drive control unit

000.043.989.82

1 ea.

 Damage code WE89 066 000 2
References

 Workshop Manual '399555 Replacing control unit for all-wheel drive system (PTM)'
 Workshop Manual '399519 Removing and installing control unit for all-wheel drive system (PTM)'

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. If a particular condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your authorized Porsche Dealer for the latest information
about whether a particular technical bulletin applies to your vehicle. Part numbers listed in these bulletins are for reference only. Always check with your authorized Porsche dealer to verify the current and
correct part numbers. 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.
© Porsche Cars North America, Inc.

Dealership
Distribution
Routing

Service Manager

_______

Shop Foreman

_______

Service Technician

________

_______

_______

_______

Asst. Manager

_______

Warranty Admin.

_______

Service Technician

________

_______

_______

_______

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2015© Porsche Cars North America, Inc.

AfterSales

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