No. 198-22

Service
Technical Information
198/22 ENU
1908
1
Radiator fan intermittently without function / DME fault memory entries P2D8900 and
P2D8C00: Re-programming DME control unit (198/22)
Change overview:
Release
Date
Change
0
11/16/2022
•
First publication
1
10/13/2023
•
•
•
Model year 2023 added
Overview of programmed DME data records updated
PIWIS Tester release updated
2
12/4/2023
•
PIWIS Tester release updated
Vehicle Type:
718 Cayman GTS 4.0 (982) / 718 Boxster GTS 4.0 (982) / Boxster 25 years (982)
718 Cayman GT4 (982) / 718 Spyder (982)
Model Year:
As of 2021 up to 2023
Concerns:
Digital motor electronics (DME) control unit
Cause:
Customers complain that the air-conditioning system cooling performance is too low. In some cases, the
yellow warning message “Engine control fault” is also displayed in the instrument cluster.
The following fault memory entries are stored in the fault memory of the DME control unit:
•
•
Cause:
P2D8900 - Radiator fan 1 (left), power supply
P2D8C00 - Radiator fan 2 (right), power supply
Due to a software error, the above fault memory entries can occur under certain pre-conditions when the
control unit is started up and thus the fault pattern described.
Action required: In the event of a customer complaint, re-program the DME control unit using the PIWIS Tester with PIWIS
Tester test software release 42.300.020 (or higher) installed.
Required tools
Tools:
•
•
Battery charger, e.g.: VAS 5906 - Battery charger or VAS 5908 - battery charger 90A
P90999 - PIWIS Tester 4 with PIWIS Tester test software release 42.300.020 (or higher) installed
Preparatory work
NOTICE
Fault entry in the fault memory or control unit programming aborted, as the case may be, due to
under-voltage.
AfterSales
Dec 4, 2023
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Service
Technical Information
ENU 198/22
1908
•
Increased current draw during diagnostics 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 work, 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 Wi-Fi connection is unstable.
•
An unstable Wi-Fi connection can interrupt communication between the PIWIS Tester III 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 detected
•
If the driver’s key is not detected in the vehicle, programming cannot be started or will be interrupted.

Place the driver's key with the back facing down in front of the lock opening for the center console cover to
guarantee a permanent wireless link between the vehicle and driver's key.
Work Procedure: 1
Carry out general preliminary work for control unit programming as described in  Workshop
Manual '9X00IN Basic instructions and procedure for control unit programming - Preliminary Work
section'.
Re-programming digital motor electronics (DME) control unit
Work
procedure:
1
The basic work 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 in the context of this Technical Information:
Required PIWIS Tester software release:
42.300.020 (or higher)
Type of control unit programming:
Control unit programming using the “Automatic
programming” function of the digital motor electronics (DME) control unit.
“Digital motor electronics (DME)” control unit –
“Coding / programming” menu – “Automatic
programming” function.
Dec 4, 2023
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Service
Technical Information
198/22 ENU
1908
Read and follow the information and instructions
on the PIWIS Tester during the guided
programming sequence.
During the programming sequence, the digital
motor electronics (DME) is re-programmed
and then automaticallyre-coded.
Programming sequence:
Do not interrupt programming and coding.
Once the control units have been programmed and
coded, you will be prompted to switch the ignition off
and then back on again after a certain waiting time.
Backup documentation of the new software versions
is then performed.
Programming time (approx.):
Programming takes up to 15 minutes, depending
on equipment.
Data set for the digital motor electronics
(DME) programmed as part of this
programming:
See the  Technical Information '9X00IN Overview
of programmed digital motor electronics (DME)
software versions' section.
Procedure in the event of error messages
appearing during the programming
sequence:
 Workshop Manual '9X00IN Basic instructions and
Procedure in the event of a termination in
the control unit programming:
Repeat control unit programming by restarting
programming.
procedure for control unit programming using the
PIWIS Tester - section on “Troubleshooting”'.
Overview of programmed DME data records
Overview:
Information
The software part number and software version of the programmed data record are based on the
specified PIWIS Tester software version. Please note that this may be different in a higher version.
718 Cayman GTS 4.0 / 718 Boxster GTS 4.0 / Boxster 25 years
•
with Porsche Doppelkupplung (PDK)
Exhaust
emission
standard
M-no.
LEV3 / TIER3
70
7CE/7MU
Model year
2021 (M)
2022 (N)
2023 (P)
x
x
x
AfterSales
=Porsche
part number
(software)
Software
release
982906034AS
0001
Dec 4, 2023
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Service
Technical Information
ENU 198/22
1908
718 Cayman GTS 4.0 / 718 Boxster GTS 4.0 / Boxster 25 years
with manual transmission
•
Exhaust
emission
standard
M-no.
LEV3 / TIER3
70
7CE/7MU
Model year
2021 (M)
2022 (N)
2023 (P)
x
x
x
=Porsche
part number
(software)
Software
release
982906034BB
0001
=Porsche
part number
(software)
Software
release
982906033BE
0001
=Porsche
part number
(software)
Software
release
982906033BH
0001
718 Cayman GT4 / 718 Spyder
with Porsche Doppelkupplung (PDK)
•
Exhaust
emission
standard
M-no.
LEV3 / TIER3
70
7CE/7MU
Model year
2021 (M)
2022 (N)
2023 (P)
x
x
x
718 Cayman GT4 / 718 Spyder
with manual transmission
•
Exhaust
emission
standard
M-no.
LEV3 / TIER3
70
7MU
Model year
2021 (M)
2022 (N)
x
x
2023 (P)
x
Concluding work
Work Procedure: 1
Carry out general reworking for control unit programming as described in  Workshop Manual
'9X00IN Basic instructions and work procedure for control unit programming using the PIWIS Tester Reworking section'.
Working position and PCSS encryption
Labor position:
APOS
Labor operation
24702501
Re-programming DME control unit
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I No.
AfterSales
Service
Technical Information
198/22 ENU
1908
1
PCSS encryption:
Location (FES5)
24700
Digital motor electronics (DME) control unit
Damage type (SA4)
4053
Programming error
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.
© Porsche Cars North America, Inc.
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Dec 4, 2023
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