No. 95-22-2

Service
Technical Information
95/22
ENU
2797
2
Charging of the High-Voltage Battery Not Possible or Faulty, Error Messages After
Charging: Re-Program High-Voltage Charger (OBC) Control Unit (95/22)
Revision:
This bulletin replaces bulletin ATI Group 2 2202.1, dated April 29, 2022.
Vehicle Type:
Cayenne E-Hybrid (9YA/9YB) / Cayenne Turbo S E-Hybrid (9YA/9YB)
Model Year:
2021
Equipment:
Charger 7.2 kW (M-Nr. KB2)
Concerns:
Control unit for high-voltage charger (OBC)
Information:
Various symptoms during or after charging the high-voltage battery, e.g.:
•
•
•
Charging of the high-voltage battery not possible or charging process is aborted
Check Engine light in the instrument cluster after charging or charging attempt active
Fault memory entry ’U112100 – Data bus – missing message (D1211D)’ stored in the fault memory
of the high-voltage charger (OBC) control unit
Action required: In the event of a customer complaint, re-program the high-voltage charger (OBC) control unit using
the PIWIS Tester with PIWIS Tester software version 40.900.050 (or higher) installed and the
corresponding programming code.
Information
The total time required for control unit programming is approx. 4 minutes.
Required tools
Tool:
Information
The Cayenne is equipped as standard with a lithium starter battery, which must only be charged using
suitable battery chargers.
For further information about the battery chargers to be used, see the corresponding Workshop
Manual.  Workshop Manual '2706IN Load general information on the 12-volt lithium-ion battery' and 
Workshop Manual '270689 battery, vehicle electrical system'
•
•
Battery charger with a current rating of at least 90 A, e.g. VAS 5908 battery charger 90A.
9900 - PIWIS Tester 3 with PIWIS Tester software version 40.900.050 (or higher) installed
Preliminary work
NOTICE
Fault entry in the fault memory and control unit programming aborted due to low voltage.
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•
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 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 Wi-Fi connection is unstable.
•
An unstable Wi-Fi connection can interrupt communication between 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) using 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
ensure a permanent radio 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 - section on
“Preliminary work”'.
Re-programming high-voltage charger (OBC) 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:
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Required PIWIS Tester software version:
40.900.050 (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:
E3S3U
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Technical Information
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ENU
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Read and follow the information and instructions
on the PIWIS Tester during the guided programming
sequence.
During programming, the high-voltage charger (OBC)
control unit is re-programmed and then re-coded
automatically.
Programming sequence:
Do not interrupt programming.
Programming time (approx):
4 minutes
Software version programmed during this
campaign:
1183
The software version information in the
programmed data record is based on the
specified PIWIS Tester software version.
Please note that this may be different in a
higher version.
•
Following control unit programming, the software
version can be read out of the high-voltage
charger (OBC) control unit from the ’Extended
identifications’ menu using the PIWIS Tester.
 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
“Troubleshooting”'.
Procedure in the event of a termination in the
control unit programming:
Repeat control unit programming by restarting
programming.
Concluding work
1
Carry out general rework for control unit programming as described in  Workshop Manual '9X00IN
Basic instructions and procedure for control unit programming using the PIWIS Tester - section on
“Rework”'.
Invoicing
For documentation and warranty invoicing, enter the working position and PCSS encryption specified
below in the warranty claim:
APOS
Labor operation
27972501
Programming high-voltage charger
I No.
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PCSS encryption:
Location (FES5)
27970
High-voltage charger
Damage type (SA4)
1611
does not function
References:
 Workshop Manual '270689 Charging vehicle electrical system battery'
 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.
© 2022 Porsche Cars North America, Inc.
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