No. 85-20

Service
Technical Information
85/20
ENU
9150
9
Symptom Inside - Continuous Tone of the ParkAssist Buzzer Sporadically Cuts Out:
Re-Programming Instrument Cluster Control Unit (SY 85/20)
Model Line:
Macan (95B)
Model Year:
As of 2019 up to 2020
Subject:
Instrument cluster control unit
Symptom:
The continuous tone of the ParkAssist buzzer on a distance of less than 30 cm/ 12 inches sporadically
cuts out after an ignition change if the vehicle is moved in selector lever position R directly after being
started.
Visual ParkAssist is still available.
Cause:
This error pattern may occur due to a timing problem between the instrument cluster control unit and the
PDC control unit.
Remedial
Action:
In the event of a customer complaint, check the software version and re-program the instrument cluster
with the appropriate programming code.
Overview of the software versions affected
Software version
Model year
1830
2019 only
0833
2019 only
0835
2019 and 2020
0838
2020 only
0839
2020 only
Information
•
The total time required for control unit programming is approx. 100 minutes.
•
This software update also corrects the complaint "Call accept key does not work in connection with
iPhone®" (see Technical Information 101/19).
Required tools
Tools:
•
•
9900 - PIWIS Tester 3 with installed PIWIS Tester software version 39.400.030 (or higher)
Battery charger with a current rating of at least 90 A, e.g. VAS 5908 Battery charger 90A.
AfterSales
Jul 24, 2020
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9
Service
9150
ENU
Technical Information
85/20
Preparatory 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 getting started, connect a suitable battery charger with a current rating of at least 90 A to the
jump-start terminals.
NOTICE
Control unit programming 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, programming may be aborted.

During control unit programming, always connect the PIWIS Tester 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 recognized 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.
Work Procedure: 1
2
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Carry out general preliminary work for control unit programming as described in  Workshop
Manual '9X00IN Basic instructions and procedure for control unit programming - section on
"Preliminary work"'.
Read out the software version.
2.1
Connect the PIWIS Tester to the vehicle and switch on the PIWIS Tester.
2.2
Switch on the ignition.
2.3
Start diagnostics.
2.4
Select control unit "Instrument cluster".
2.5
Select the "Extended identifications" tab.
2.6
Read out and note the software version.
AfterSales
Service
Technical Information
85/20
ENU
9150
9
Re-programming instrument cluster control unit
Work Procedure: 1
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 - section
on "Programming"'.
Specific information on control unit programming in the context of this Technical Information:
Required PIWIS Tester software version:
39.400.030 (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.
Software version: 1830
Programming code: H8B6C
Software version: 0833
Programming code: S2T8E
Software version: 0835, 0838, 0839
Programming code: C6P3X
Programming sequence:
Read and follow the information and instructions
on the PIWIS Tester during the guided programming
sequence.
During the programming sequence, the instrument
cluster control unit is re-programmed and then automatically re-coded.
Do not interrupt programming.
Programming time (approx):
100 minutes
Software version programmed during this
campaign:
0841
Following control unit programming, the software
version can be read out of the instrument cluster
control unit in the  'Extended identifications' menu
using the PIWIS Tester.
AfterSales
Jul 24, 2020
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Service
9150
ENU
Technical Information
85/20
 Workshop Manual '9X00IN Basic instructions and
Procedure in the event of error messages
appearing during the programming
sequence:
procedure for control unit programming - section on
"Fault finding"'.
Procedure in the event of abnormal termination of control unit programming:
Repeat control unit programming by restarting
programming.
Concluding work
Work Procedure: 1
Carry out general subsequent 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 "Subsequent work"'.
Invoicing
Invoicing:
For documentation and warranty invoicing, enter the labor operations and PQIS coding specified below in
the warranty claim:
APOS
Labour operation
I No.
90250100
Checking the instrument cluster
90252500
Programming the instrument cluster
PQIS coding:
Location (FES5)
9176
Buzzer
Damage type (SA4)
1613
does not function at times
References:
 Workshop Manual '9X00IN Basic instructions and procedure for control unit programming using the
PIWIS Tester'
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.
© 2020 Porsche Cars North America, Inc.
Jul 24, 2020
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