No. 06-21-2 Service Bulletin/Repair Instructions

Service
Technical Information
06/21
ENU
2470
2
Complaint - Warning Messages in the Instrument Cluster/Fault Memory Entries in the DME

Control Unit: Re-Programming DME Control Unit (06/21)

Vehicle Type:
911 Carrera (992)/911 Carrera S (992)/911 Carrera 4 (992)/911 Carrera 4S (992)
Model Year:
As of 2020 up to 2021
Concerns:
Engine electronics (DME) control unit
Information:
New software available for the engine electronics (DME) control unit. The new software will correct the

following fault symptoms:

•
The yellow warning 'Engine control system fault – Driving permitted' is displayed together with

the white error message 'ACC not available' in the instrument cluster. The message can appear at

speeds above 170 km/h (106 mph) or can occur sporadically when the button on the control stalk

for activating ACC is pressed briefly.
•
The warning 'Engine control system fault' is displayed in the instrument cluster. The message

appears when the brake pedal is pressed and the convertible top or front axle lift system is activated

at the same time. The fault memory entry 'P070300 – Brake light switch – electrical fault' is

stored in the fault memory of the DME control unit.
•
The fault memory entries 'P1BFC00 – Radiator shutter 1 (left) – position implausible' and

'P1BFD00 – Radiator shutter 2 (right) – position implausible' are stored in the fault memory

of the DME control unit. This is caused by different position detection of the radiator shutter control

unit and DME control unit.
Action required: In the event of a customer complaint, re-program the DME control unit.
Information

The total time required for control unit programming is approx. 12 minutes.
Required tools

Information

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'.
AfterSales
Mar 9, 2021

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2
Service

2470
Tools:
ENU
•
•
Technical Information
06/21
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. VAS5908 battery charger,

90A

9900 - PIWIS Tester 3 with PIWIS Tester software version 39.900.015 (or higher) installed
Preparatory work

WARNING

Electrically moved side windows and rear spoiler

•
Danger of limbs being trapped or severed
•
Risk of damage to components

Do not reach into the danger area.

Keep third parties away from the danger area.

Do not move components or tools into the danger area.

Retract roll-up sun blinds on the rear side windows before starting programming or coding.

NOTICE
Fault entry in the fault memory and control unit programming aborted due to undervoltage.

•
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 WiFi 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 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.
Mar 9, 2021

Page 2 of 7
AfterSales
Service
Technical Information
Work Procedure: 1
2
06/21
ENU
2470
2
Connect a battery charger with a current rating of at least 90 A, e.g. battery charger, 90A, to the

jump-start terminals in the luggage compartment and switch it on.  Workshop Manual '270689

Charging battery/vehicle electrical system'

Place remote control (hand-held transmitter) in the emergency start tray.
Emergency start tray

3
Connect 9900 - PIWIS Tester 3 to the vehicle communication module (VCI) via the USB cable.

Then connect the communication module to the vehicle and switch on the PIWIS Tester.
4
Switch on ignition.
Re-programming DME control unit

NOTICE

Use of a PIWIS Tester software version that is older than the prescribed 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:
39.900.015 (or higher)
AfterSales
Mar 9, 2021

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Service

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Technical Information
06/21
Type of control unit programming:
Control unit programming using the 'Automatic

programming' function of the DME control unit:

'Engine electronics (DME)' control unit –

'Coding/programming' menu – 'Automatic

programming' function.

Read and follow the information and instructions

on the PIWIS Tester during the guided programming

sequence.

During the programming sequence, the DME control

unit is re-programmed and then re-codedautomatically.
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.
Mar 9, 2021

Page 4 of 7
Programming time (approx.):
12 minutes
Data record (software part number and

software version) programmed for the DME

control unit during programming:
See  Technical Information '9X00IN Overview of the

programmed software versions'.
Procedure in the event of abnormal termination of control unit programming:
• Switch ignition off and then on again.

• Read out and erase fault memories  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.
Procedure in the event of error messages

appearing during the programming

sequence:
 Workshop Manual '9X00IN Basic instructions and
The software part number and software version of the

programmed data record are based on the specified

PIWIS Tester software version. Please note that these

may have changed in a higher version.
procedure for control unit programming using the

PIWIS Tester - section on "Fault finding"'.
AfterSales
Service
Technical Information
06/21
ENU
2470
2
Overview of the programmed software versions

Overview:
911 Carrera

Exhaust emission

standard
Control unit
Software Part No. *
Software version*
LEV3/Tier3

(I-no. 7CA)

(I-no. 7CE)

(I-no. 7MU)
DME
992906021AQ
0001
Exhaust emission

standard
Control unit
Software Part No. *
Software version*
LEV3/Tier3

(I-no. 7CA)

(I-no. 7CE)

(I-no. 7MU)
DME
992906020BJ
0001
911 Carrera S
* The software part number and software version of the programmed data record are based on the

specified PIWIS Tester software version. Please note that these may have changed in a higher version.
Performing radiator shutter adaptation

Work Procedure:
Information

Only necessary if the following fault memory entries were stored:

•
'P1BFC00 – Radiator shutter 1 (left) – position implausible'
•
'P1BFD00 – Radiator shutter 2 (right) – position implausible'
1
Select 'Maintenance/repairs' menu.
2
Select the 'Radiator shutter adaptation' function

so that the corresponding text line turns blue and

then press •F8“ ('Start') to start radiator shutter

adaptation  Radiator shutter adaptation.
3
Follow the instructions on the PIWIS Tester while

radiator shutter adaptation is being performed

 PIWIS instructions.

Once adaptation is complete, a tick will appear in the

'Value' field on the PIWIS Tester display.
AfterSales
Radiator shutter adaptation
Mar 9, 2021

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Service

2470
ENU
Technical Information
06/21
If radiator shutter adaptation is not completed

successfully, the adaptation must be repeated.

4
End radiator shutter adaptation by pressing •F8“

('Stop').
5
Press •F11“ ('Back') to return to the start page of

the 'Maintenance/repairs' menu.
PIWIS instructions

6
Select the 'Overview' menu to return to the control

unit selection screen  Control unit selection.
Control unit selection
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

For documentation and invoicing in the event of a warranty claim, enter the labor operations and PQIS

coding specified below in the warranty claim, depending on the required scope of the measures to be

performed:

I No.
APOS
Labor operation
24702540
Programming DME control unit
24702541
Programming DME control unit/Radiator shutter

adaptation
Mar 9, 2021

Page 6 of 7
AfterSales
Service
Technical Information
06/21
ENU
2470
2
PQIS coding:

Location (FES5)
24700
DME control unit
Damage type (SA4)
1200
Incorrect/missing part
References:
 Workshop Manual '270689 Charging battery/vehicle electrical system'

 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.
© 2021 Porsche Cars North America, Inc.
AfterSales
Mar 9, 2021

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