Service

Technical Information

27/15

ENU

8702

8

Symptom in Vehicle Interior - Air-conditioning System Does Not Function: Re-programming
air-conditioning control unit (SY 27/15)
General information
Model Line:

Macan

Model Year:

As of 2015

Symptom:

No cooling performance from the air-conditioning system.

Cause:

The evaporator for the air-conditioning system can freeze at high outside temperatures and high humidity.

Remedial
Action:

Re-program control unit for air-conditioning system using a modified parameter set.
Information
Before doing any other work, the software version must be read out of the air-conditioning control
unit using the PIWIS Tester.
 If the software version is higher than “1040”, the remedial action described below must not be
carried out.
 The software in the air-conditioning control unit is already the latest version in this case. Programming
the air-conditioning control unit using the programming code will not resolve the problem.

Tools:

Battery Charger/Power Supply - Suitable for AGM Type batteries, recommended current rating of 70A
fixed voltage 13.5V to 14.5V.
9900 - PIWIS Tester III

Re-programming air-conditioning control unit
Preliminary
Work:
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 starting control unit programming, connect a suitable battery charger or power supply, suitable for
AGM type batteries, recommended current rating of 70A fixed voltage 13.5V to 14.5V.

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8702

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Technical Information

27/15

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

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



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

Control unit programming will be aborted if the driver's key is not recognized
•

If the driver's key is not recognised in vehicles with Porsche Entry & Drive, programming cannot be started
or will be interrupted.



Switch on the ignition using the original driver’s key. To do this, replace the control unit in the ignition lock
with the original driver’s key if necessary.
1

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"'.

Information
Before doing any other work, the software version must be read out of the air-conditioning control
unit using the PIWIS Tester.
 If the software version is higher than “1040”, the remedial action described below must not be
carried out.
 The software in the air-conditioning control unit is already the latest version in this case. Programming
the air-conditioning control unit using the programming code will not resolve the problem.
Re-program control unit for air-conditioning system.
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"'.
Specific information on control unit programming during this repair measure:

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Service

Technical Information

27/15

Reading out the software version:

ENU

8702

8

‘Air-conditioning’ control unit  ‘Extended identifications’ menu
 Software version:
•

The measure described below must only be carried
out if the software version is lower than 1040.

Required PIWIS Tester III software
version:

33.800.020 (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:

R4K5P

Programming sequence:

Read and follow the information and instructions on the
PIWIS Tester during the guided programming sequence.
The control unit for the air-conditioning system is
re-programmed first during the programming sequence.
Once programming is complete, the control unit is
re-codedautomatically.
Do not interrupt programming and coding.

Time required for programming and
coding:

approx. 4 minutes

Software version programmed during
this repair measure:

1040

Procedure in the event of error
messages appearing during the
programming sequence:

 Workshop Manual '9X00IN Basic instructions and

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

Repeat control unit programming by entering the
programming code again.

Subsequent work:2

Invoicing:

Following control unit programming, the software version can
be read out of the air-conditioning system control unit in the
 'Extended identification' menu using the PIWIS Tester.
procedure for control unit programming using the PIWIS
Tester - section on "Fault finding"'.

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"'.

The work involved is invoiced under the labor operation:

APOS

Labor operation

87022580

Programming air conditioning control

2017© Porsche Cars North America, Inc.

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For invoicing and documentation using PQIS, enter the following coding:
Location (FES5)

87020

Air conditioning control

Damage type (SA4)

9830

Cannot establish cause, software re-installed

References:

 Workshop Manual '9X00IN Basic instructions and procedure for control unit programming using the
PIWIS Tester - section on "Preliminary work"'

 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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Distribution
Routing

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_______

Shop Foreman

_______

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_______

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Asst. Manager

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