Service

Technical Information

29/13

ENU

9025

9

Eliminating Symptoms in Body Interior: Re-programming Instrument Cluster Control Unit
(Failure of TFT display in instrument cluster/SY 29/13)
Model Line:

911 (991)
Boxster/Cayman (981)

Model Year:

As of 2012 up to 2014

Subject:

TFT display in instrument cluster

Symptom:

Customer complains that the TFT display stops working after the vehicle has been parked for a long time
in the sun or during a long trip.

Cause:

An error in the software can cause the TFT display to stop working under the specified conditions.

Remedial
Action:

Re-program instrument cluster control unit.

Date of
Introduction:

An instrument cluster with updated software is installed during production in all vehicles as of
production date March 10, 2014.

Parts Info:

PCM3.1 Update CD (WKD95280015 or newer version)

Tools:

VAS 5908 - Battery Charger, 90 A
9900 - PIWIS Tester III

NOTICE
Fault entry in the fault memory and control unit programming aborted due to low voltage.
•

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



Before commencing work, connect a suitable battery charger or power supply, suitable for AGM type
batteries, recommended current rating of 90A fixed voltage 13.5V to 14.5V.
NOTICE

Control unit programming will be aborted if the Internet connection is unstable.
•

An unstable Internet connection can interrupt communication between PIWIS Tester and the vehicle
communication module (VCI). As a result, control unit programming may be aborted.



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

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Technical Information

29/13

NOTICE
Control unit programming will be aborted if the vehicle key is not recognized
•

If the vehicle key is not recognized in vehicles with Porsche Entry & Drive, programming cannot be started
or will be interrupted.



Switch on the ignition using the original vehicle key. To do this, replace the original vehicle key in the
ignition lock with the plastic key fob if it was previously removed at the start of this procedure.
1

Connect a battery charger with a current rating of at least 90 A.
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.

2

Switch on the ignition using the original driver's key. For vehicles with “Porsche Entry & Drive”,
replace the control panel in the ignition lock with the original driver’s key, if necessary.

3

9900 - PIWIS Tester III 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.

Work Procedure:
Re-program instrument cluster control unit:
4

On the PIWIS Tester start screen, call up the  'Diagnostics' menu and select the relevant vehicle
type.
The diagnostic application is then started and the control unit selection screen is populated.

5

In the control unit selection screen ( 'Overview' menu), press •F7“ to call up the  'Additional
menu'.

6

When the question “Create Vehicle Analysis Log (VAL)?” appears, either press •F12“ to create a
VAL or press •F11“ if you do not want to create a VAL.

7

Press •>>“ to acknowledge the message informing you that campaigns for the vehicle are stored
in the PIWIS information system.

8

Select the  'Campaign' function and confirm your selection by pressing •>>“.
You are then prompted to enter a campaign number.

9

To enter the campaign number, click in the relevant text box so that the cursor starts to flash.

10 Enter the programming code C8K6B and press •Enter“ to confirm.
The text box turns blue.
Press •>>“ to start the guided programming sequence.
Read the information and follow the prompts by pressing •>>“.
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Technical Information

29/13

ENU

9025

9

Information
Read and follow the information and instructions on the PIWIS Tester during the guided
programming sequence. Do not interrupt programming and coding.

Information
Software version of the instrument cluster after programming has been carried out successfully:
0373.
11 Once programming/coding has been carried out successfully, press • Settings in the instrument cluster to reset the tire type and tire size. The wheel position values
will then be re-taught in the control unit during the test drive (at a speed of over 15 mph or25
km/h).
To set the tire type and tire size, see  Owner’s Manual, chapter Instrument Panel and Multi-Function
Display - ‘Tire Pressure Monitoring, TPM’.
15 On vehicles with Porsche Entry & Drive, replace the original vehicle key in the ignition lock with the
control panel again.
Invoicing
The work involved is invoiced under the labor operation:
•

90252510: Re-programming instrument cluster control unit

For invoicing and documentation using PQIS, specify “90250” as the fault location (FES5) and
“4042” as the damage category (SA4).

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29/13

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.

© 2019 Porsche Cars North America, Inc.

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