122-A7B9Q-10

Service
Technical Information
110/17 ENU WH35
9
WH35 - Re-Coding Service Interval (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:
2017
Vehicle Type:
911 Carrera GTS (991)/911 Carrera 4 GTS (991)/911 Targa 4 GTS (991)
Subject:
Oil change service interval in the instrument cluster
Information:
The instrument cluster on the affected vehicles may have been coded with incorrect values for
the service interval.
As a result, the due date for the oil change service is displayed too late in the instrument cluster.
Remedial
Action:
Re-code service interval.
Affected
Vehicles:
Only the vehicles assigned to the campaign (see also PIWIS Vehicle Information). This campaign affects
189 vehicles in North America.
Required tools
NOTICE
Use of a PIWIS Tester software version that is older than the prescribed version
•
Measure is ineffective

Always use the prescribed version or a higher version of the PIWIS Tester software for control unit
programming.
Tools:
•
•
9900 - PIWIS Tester 3 with PIWIS Tester software version 36.200.010 (or higher) installed
Battery Charger/Power Supply - Suitable for AGM Type batteries, recommended current rating of
70A fixed voltage 13.5V to 14.5V.
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Preparatory work
NOTICE
Coding will be aborted in the event of low voltage.
•
Increased power consumption during diagnosis can cause a drop in voltage, which can result in one or
more fault entries and abortion of the coding process.

Before getting started, connect a suitable battery charger to the jump-start terminals in the engine
compartment.
NOTICE
Coding 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, coding may be aborted.

During control unit coding, always connect the PIWIS Tester to the vehicle communication module (VCI) via
the USB cable.
NOTICE
Control unit coding will be aborted if the vehicle key is not recognized
•
If the vehicle key is not recognized in vehicles with Porsche Entry & Drive, coding cannot be started or will
be interrupted.

Switch on the ignition using the original vehicle key. To do this, replace the dummy key in the ignition lock
with the original vehicle key if necessary.
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Service
Technical Information
Work Procedure: 1
110/17 ENU WH35
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Connect battery charger.
First connect the positive cable of the charger to the
positive terminal of the battery and then connect the
negative cable of the charger to the ground point for
jump-lead starting  External power connection.
2
Switch on the ignition.
3
9900 - PIWIS Tester 3 must be connected to the
vehicle communication module (VCI) via the USB
cable. Then connect the communication module
to the vehicle and switch on the PIWIS Tester.
4
On the PIWIS Tester start screen, call up the 'Diagnostics' application. The vehicle type is then read
out, the diagnostic application is started and the
control unit selection screen is populated.
External power connection
Re-coding service interval
NOTICE
Use of a PIWIS Tester software version that is older than the prescribed version
•
Measure is ineffective

Always use the prescribed version or a higher version of the PIWIS Tester software for control unit coding.
Information
The procedure described here is based on the PIWIS Tester 3 software version 36.200.010.
The PIWIS Tester instructions take precedence and in the event of a discrepancy, these are the
instructions that must be followed.
A discrepancy may arise with later software versions for example.
Work Procedure:
Control unit selection – Instrument cluster
1
Select 'Instrument cluster' in the control unit selection screen ('Overview' menu) and press
•F12“ ('Next') to confirm your selection .
2
When the question “Create Vehicle Analysis Log (VAL)?” appears, either press •F12“ ('Yes') to
create a VAL or press •F11“ ('No') if you do not want to create a VAL.
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3
Press •F12“ ('Next') to acknowledge the message informing you that campaigns for the vehicle are
stored in the PIWIS information system.
4
Once the instrument cluster has been found and is displayed in the overview, select the 'Maintenance/repairs' menu.
5
Select the 'Write service interval' function and press •F12“ ('Next') to confirm your selection .
"Write service interval" function
6
Press •F12“ ('Next') to confirm the message “This procedure is used to write service intervals, e.g.
when installing a new instrument cluster”.
7
Check the value entered for the country in which the vehicle is operated and correct it if necessary.
Then press •F12“ ('Next') to continue.
8
Confirm the values entered for date and mileage of the last customer service by pressing •F12“
('Next').
Writing service interval
9
Write the service interval by pressing •F8“ ('Execute') .
When coding is complete, the message “Coding has been completed successfully” is displayed and a tick
appears in the 'Status' box.
If coding is not completed successfully (error message “Coding was not completed successfully”),
coding must be repeated.
10 Once coding has been completed successfully, press •F12“ ('Next') to return to the start page of
the 'Coding/programming' menu.
11 Select the 'Overview' menu and press •F11“ ('Back') to return to the control unit selection screen.
Concluding work
Work Procedure: 1
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Switch off the ignition.
2
Disconnect the PIWIS Tester from the vehicle.
3
Switch off and disconnect the battery charger.
4
Enter the campaign in the Warranty and Maintenance booklet.
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Warranty processing
Scope:
Working time:
Re-coding service interval
Includes:
Connecting and disconnecting battery charger
Connecting and disconnecting PIWIS Tester
Labor time: 27 TU
 Damage Code WH35 066 000 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. 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.
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