Installation and Conversion Instructions

911 (991)
40/15

ENU

4890

4

Power Steering Plus (I-no. 658)

Vehicles Type:

911 (991) Gen. II

Model Year:

As of 2017

Concern:

Retrofitting

Restriction:

Only for vehicles with standard power steering (657)

Notes:

Power steering Plus is a speed-sensitive power steering system. It reduces steering forces while
manoeuvring the vehicle and driving at low speeds.

Parts Info:

991.044.901.15

Activation
Code:

Power steering Plus
These components require a VIN-specific enabling code and will not function without it. To get the
enabling code, order the applicable kit via your normal parts channels (POLARIS). You must then submit
a Parts Technical Assistance Request (PTAR) in the PTEC system with the correct VIN, Part Number
and PCNA order number to PCNA Parts Support. The PTAR will be returned to you in 1+ working days,
advising you that the code is now displayed in the PIWIS System. Consult Parts Bulletin GR13D90 for
additional ordering details.

Tools:

9818 - PIWIS Tester II

Work Procedure: 1

 Power steering Plus

Preparatory work.
1.1

Connect a battery charger.  Workshop Manual '2X00IN Battery trickle charging'

NOTICE
Voltage drop
•

Risk of irreparable damage to control unit

•

Risk of damage to control unit

•

Fault entries in the control unit

•

Coding in the control unit is aborted

•

Malfunctions in control unit, even during programming



Prior to disconnecting the control unit, switch off the ignition and remove the ignition key.



Ensure that the power supply is not interrupted during programming.

2016© Porsche Cars North America, Inc.

Tequipment

Mar 2, 2016
Page 1 of 3

4


911 (991)
4890

ENU

Installation and Conversion Instructions

40/15

Connect battery charger/power supply suitable for AGM Type batteries, recommended current rating
of 70A fixed voltage 13.5V to 14.5V.

Information
The 9818 - PIWIS Tester 2 instructions take precedence since the description may be different
with later Tester releases.
The procedure described here has been structured in general terms; different text or additions may
appear on the 9818 - PIWIS Tester 2.

Information
The following prerequisites must be met for coding Power steering Plus:

2

•

9818 - PIWIS Tester II software version 14.400 or higher

•

Activation code for Power steering Plus available

Code Power steering Plus.
2.1

9818 - PIWIS Tester II must now be connected and the ignition switched on.

2.2

Select the required vehicle type. PIWIS Tester Diagnostics starts.

2.3

Maintenance of vehicle data.
2.3.1

Additional menu must now be selected by pressing •F7“. Press •F11“ to
confirm the question “Create vehicle analysis log (VAL)?”.

2.3.2

Select the Maintenance of vehicle data function. Press •F12“ until M
numbers appears in the Value group column.

2.3.3

De-select "Installed" in the Coding value column 657 - Standard power steering.

2.3.4

Select "Installed" in the Coding value column 658 - Servotronic.

2.3.5

Enter the activation code and press OK to confirm.
Press •F12“ to continue.

2.3.6

A table containing the values to be changed appears.
Save the values by pressing •F8“.

2.3.7

Wait until the message Generation of vehicle data is complete..... appears.

2.3.8

Press •F12“ to switch to Report management.

2.3.9

Press •F10“ to open the log and check that vehicle equipment Standard power
steering (657) is no longer displayed and vehicle equipment Servotronic (658)
is displayed.
Close the log.

2.4

Mar 2, 2016
Page 2 of 3

Adapt coding.

Tequipment

2016© Porsche Cars North America, Inc.

2.4.1

4

911 (991)

Installation and Conversion Instructions

40/15

4890

ENU

Switch to the Overview menu.
Press •F11“ to return to the list of control units.

2.4.2

Select all control units by pressing •Ctrl A“. Press •F12“ to continue.

2.4.3

Switch to the Codings/adaptations menu. Press •F12“ to continue.
Select Automatic coding mode. Press •F12“ to continue.

48902500:

2.4.4

Wait until the message Coding has been completed successfully appears.
Press •F12“ to continue.

2.4.5

Switch to the Overview menu.

2.5

Read out the fault memories of all systems, work through any existing faults and erase the
fault memories.  Workshop Manual '033500 Fault memory for on-board diagnosis'

2.6

Disconnect the battery charger.  Workshop Manual '2X00IN Battery trickle charging'

2.7

Carry out a function test.
Labor time: 50 TU

Activating Power steering Plus.

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

________

_______

_______

_______

Dr. Ing. h.c. F. Porsche AG is the owner of numerous trademarks, both registered and unregistered, including without limitation the Porsche Crest®, Porsche®, Boxster®, Carrera®, Cayenne®,
Cayman®, Macan®, Panamera®, Speedster®, Spyder®, 918 Spyder®, Tiptronic®, VarioCam®, PCM®, PDK®, 911®, RS®, 4S®, FOUR, UNCOMPROMISED®, and the model numbers and the
distinctive shapes of the Porsche automobiles such as, the federally registered 911 and Boxster automobiles. The third party trademarks contained herein are the properties of their respective owners.
Porsche Cars North America, Inc. believes the specifications to be correct at the time of printing. Specifications, performance standards, standard equipment, options, and other elements shown are
subject to change without notice. Some options may be unavailable when a car is built. Some vehicles may be shown with non-U.S. equipment. The information contained herein is for internal authorized
Porsche dealer use only and cannot be copied or distributed. Porsche recommends seat belt usage and observance of traffic laws at all times.
Printed in the USA

2016© Porsche Cars North America, Inc.

Tequipment

Mar 2, 2016
Page 3 of 3