No. 213.21

Service
Technical Information
213/21 ENU
4316
4
Message "Chassis system fault" in Instrument Cluster/Fault Memory Entry in PASM Control
Unit: Re-Programming Control Unit for Chassis Control (PASM) (213/21)
Model Line:
911 (992)
Model Year:
As of 2021 up to 2022
Concerns:
Control unit for chassis control (PASM)
Information:
The yellow warning message "Chassis system fault" is displayed in the instrument cluster.
One or more of the following fault memory entries is stored in the fault memory of the PASM control unit:
•
C10B804 – Front left body acceleration sensor faulty
•
C10B904 – Front right body acceleration sensor faulty
•
C130B04 – Rear left body acceleration sensor faulty
•
B2F0100 – PASM system switch-off stage 3: Failure of damper control
This is caused by a sporadic software error during initialization of the body acceleration sensors.
Action required: In the event of a customer complaint, re-program the PASM control unit using the PIWIS Tester with PIWIS
Tester software version 40.900.030 (or higher) installed and the corresponding programming code.
Information
The total time required for control unit programming is approx. 5 minutes.
Software:
Overview of the software versions affected
Control unit
Software version (old
version)
Software version (new
version)
Chassis control (PASM)
1420
1440
Information
Programming can only be carried out on PASM control units with the previous software version '1420'.
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Technical Information
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Required tools
Information
The new 911 (992) is equipped with either a lithium starter battery (M no. J2A) or an AGM starter
battery (M No. J0V, J4K) as standard.
This depends on the following:
•
Country version
•
Model type
•
Vehicle equipment
Lithium starter batteries must only be charged using a suitable battery charger that has a current
and voltage-controlled charge map.
For further information about the battery chargers to be used, see  Workshop Manual '270689
Charging battery/vehicle electrical system'.
Tool:
•
•
Battery charger with a current rating of at least 90 A and, if required, also with a current and
voltage-controlled charge map for lithium starter batteries, e.g. VAS 5908 battery charger,
90A
9900 - PIWIS Tester 3 with PIWIS Tester software version 40.900.030 (or higher) installed
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 Wi-Fi connection is unstable.
•
An unstable Wi-Fi connection can interrupt communication between PIWIS Tester II and the vehicle
communication module (VCI). As a result, control unit 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
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Technical Information
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•
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 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 control unit for chassis control (PASM)
NOTICE
Use of a PIWIS Tester software version that is older than the specified version
•
Measure is ineffective

Always use the prescribed version or a higher version of the PIWIS Tester software for control unit
programming and coding.
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 using the
PIWIS Tester - section on “Programming”'.
Specific information on control unit programming in the context of this Technical Information:
Required PIWIS Tester software version:
40.900.030 (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.
Programming code:
X8D4W
Programming sequence:
Read and follow the information and instructions
on the PIWIS Tester during the guided programming
sequence.
During the programming sequence, the PASM control
unit is re-programmed and then automaticallyrecoded.
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.
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Programming time (approx.):
5 minutes
Software version programmed during
programming software version for the PASM
control unit:
1440
Following control unit programming, the software
version can be read out of the control unit for chassis
control (PASM) in the  'Extended identifications' menu
using the PIWIS Tester.
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.
Procedure in the event of abnormal termination of control unit programming:
•
•
•
Switch ignition off and then on again.
Read out and erase the fault memory . 
Workshop Manual '9X00IN Basic instructions and
procedure for control unit programming using the
PIWIS Tester - section on "Subsequent work"'
Repeat control unit programming by restarting
programming.
 Workshop Manual '9X00IN Basic instructions and
Procedure in the event of error messages
appearing during the programming
sequence:
procedure for control unit programming using the
PIWIS Tester - section on “Troubleshooting”'.
Concluding work
Work Procedure: 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
43162501
Programming control unit for chassis control
I No.
PCSS encryption:
Location (FES5)
43160
Control unit for chassis control
Damage type (SA4)
1611
does not function
References:
 Workshop Manual '270689 Charging battery/vehicle electrical system'
 Workshop Manual '9X00IN Basic instructions and procedure for control unit programming using the
PIWIS Tester'
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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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