Service

Technical Information

13/15

ENU

9415

9

Commissioning of Headlight Control Units (only for LED headlights) Following
Replacement: Observe Specified Procedure (13/15)

Information
This Technical Information replaces the Quick Information dated February 04, 2015.
Changes/additions compared to the previous document:
•

There is no longer a time limit on the validity of the document.

•

Situation is changed or new information added to reflect the procedure using the PIWIS Tester.
Information

•

Document with limited validity.

This Quick Information shall remain valid until such a time as further information about the remedial action
becomes available.
The document will be changed accordingly.
Model Line:

911 (991)

Model Year:

2015

Equipment:

Only headlights with LED bulbs

Concerns:

Headlights, (central) headlight control unit and LED control unit

Information:

•
•

In the event of spare parts requirements due to a hardware fault or
when commissioning the headlight control unit/LED control unit using the PIWIS Tester

the following points must be observed:
a) If a hardware fault is found on a headlight,
only the relevant headlight or the faulty components need to be replaced.
The existing control units must not be replaced.
 The replacement of control units in the event of hardware faults is not a long-term solution.
The fault codes that were entered previously are no longer present only in the new control unit (i.e. the
fault codes are deleted).
This does not correct the actual cause of the fault. The fault can occur again.

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AfterSales

Mar 19, 2015
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9

Service
9415

ENU

Technical Information

13/15

b) If an LED control unit needs to be replaced, the affected control units can be commissioned
(started up) from now on (with PIWIS Tester test software 15.200 installed) by selecting 'Headlight
start-up' in the “Maintenance/repairs” menu.
 If 'Headlight start-up' is cancelled "sporadically" by the Tester, control unit programming
must also be carried out, see Step c).
c) If a headlight control unit needs to be replaced
the headlight control unit must be re-programmed before commissioning:
Preliminary work
Carry out general preliminary work for control unit programming as described in  Workshop
Manual '9X00IN Basic instructions and procedure for control unit programming using the
PIWIS Tester - section on "Preliminary work"'.
Re-program headlight control unit:
The basic procedure for programming a control unit is described in the Workshop Manual 
Workshop Manual '9X00IN Basic instructions and procedure for control unit programming
using the PIWIS Tester - section on "Programming"'.
Required PIWIS Tester software version:

15.200 (or higher)

Type of control unit programming:

Control unit programming using the
'Campaign' function in the Additional menu
on the PIWIS Tester by entering a programming
code.

Programming code:

X5M6C

Programming sequence:

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

Mar 19, 2015
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Procedure in the event of error messages
appearing during the programming
sequence:

 Workshop Manual '9X00IN Basic instructions

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

Repeat control unit programming by entering
the programming code again.

AfterSales

and procedure for control unit programming
using the PIWIS Tester - section on "Troubleshooting"'.

2015© Porsche Cars North America, Inc.

Service

Technical Information

13/15

ENU

9415

9

Subsequent work
Carry out general subsequent work for control unit programming as described in the
Workshop Manual  Workshop Manual '9X00IN Basic instructions and procedure for control
unit programming using the PIWIS Tester - section on "Subsequent work"'.

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.
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