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WF34 - Re-programming DME Control Unit (Workshop Campaign)

Important:

CRITICAL WARNING - This campaign includes steps where control unit(s) in the vehicle will be
programmed with the PIWIS Tester. The vehicle voltage must be maintained between 13.5 volts and 14.5
volts during this programming. Failure to maintain this voltage could result in damaged control unit(s).
Damage caused by inadequate voltage during programming is not a warrantable defect. The technician
must verify the actual vehicle voltage in the PIWIS Tester before starting the campaign and also document
the actual voltage on the repair order. Please refer to Equipment Information EQ1401 for a list of suitable
battery chargers/power supplies which should be used to maintain vehicle voltage.

Model Year:

As of 2015 up to 2016

Vehicle Type:

Cayenne Diesel (92A)

Concerns:

DME control unit

Information:

This is to inform you of a voluntary Workshop Campaign on the above-mentioned vehicles. On the
affected vehicles with Selective Catalytic Reduction (SCR), there is a possibility that the
fault memory entry P20FE00 "Reducing agent metering unit malfunction“ will be entered in
the DME control unit fault memory and the Check Engine light will be activated because the
diagnostic setup of the SCR system is too sensitive in the low-temperature range, although the
AdBlue® metering quantity is still set correctly in this temperature range.

Action
Required:

To prevent incorrect diagnosis of the SCR system in the low-temperature range, the diagnostic setup of
the SCR system must be adapted.
To do this, re-program the DME control unit using an updated data record.
Information
In addition to the DME control unit, the Tiptronic control unit is also re-programmed automatically. It
takes approx. 8 minutes in total to program the control units.

Affected
Vehicles:

The VIN(s) can be checked by using PIWIS Vehicle Information link to verify if the campaign affects the
vehicle. This campaign is scope specific to the VIN! Failure to verify in PIWIS may result in an improper
repair. This campaign affects 3,251 vehicles in North America.

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Information
If other programming campaigns that affect the same control unit and involve the identical
procedure are open for a vehicle in addition to this campaign, the affected control unit must only be
programmed once using the current PIWIS Tester software.
Only the latest campaign must be invoiced during warranty processing.
Other open programming campaigns that affect the same control unit and involve the identical procedure
must therefore no longer be carried out.
Proceed as follows in this case:
•

In PQIS, mark the campaign as 'cannot be carried out' with the reason “Modification of the
affected component”. The "Warranty relevance" flag must be activated in order to be able to set
a warranty claim and close the campaign.

•

A warranty claim must be submitted for the campaign in which 0 TU is entered as the specified
working time and no material items are specified.

Tools:

•
•

9818 - PIWIS Tester II with PIWIS Tester test software version 15.500 (or higher) installed.
Battery Charger/Power Supply - Suitable for AGM Type batteries, recommended current rating
of 70A fixed voltage 13.5V to 14.5V. Refer to Equipment Information EQ-1105.

Claim
Submission:

See Attachment “A”.

Preliminary 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 starting control unit programming, connect a suitable battery charger or power supply, suitable for
AGM type batteries, recommended current rating of 70A fixed voltage 13.5V to 14.5V.
NOTICE

Control unit programming will be aborted if the WLAN connection is unstable.
•

An unstable WLAN 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 PIWIS Tester II to the vehicle communication module
(VCI) via the USB cable.

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NOTICE
Programming interrupted
•

Malfunctions in control unit

•

Risk of damage to control unit



Route the line between the PIWIS Tester and the vehicle communication module (VCI) without tension to
prevent the line from slipping out of the USB connection on the PIWIS Tester.



Lock connecting lines on the vehicle communication module (VCI) using the bayonet lock.



Route the line between the vehicle communication module (VCI) and diagnostic socket on the vehicle
without tension and make sure that the connector is inserted fully into the diagnostic socket.



Check that the rechargeable battery for the PIWIS Tester is charged sufficiently. Connect the PIWIS Tester
to the power supply unit if necessary.
NOTICE

Control unit programming will be aborted if the vehicle key is not recognized
•

If the vehicle 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 panel in the ignition
lock with the original driver’s key if necessary.

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 using the PIWIS
Tester - section on "Preliminary work"'.

Carrying out control unit programming
Information
The procedure described here is based on the PIWIS Tester II software version 15.500.
The PIWIS Tester instructions take precedence and in the event of a discrepancy, these are the
instructions that must be followed.
A discrepancy may arise with later software versions for example.
Work Procedure: 1

Re-program DME control unit.
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 during this campaign:

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Required PIWIS Tester software version:

15.500 (or higher)

Type of control unit programming:

Control unit programming using the 'Automatic
programming' function for the DME control unit.
DME control unit >  '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 - as well as the Tiptronic control unit
- will be re-programmed and then re-codedautomatically.

Programming sequence:

Do not interrupt programming and coding.
Programming time (approx.):

8 - 10 minutes

Porsche Part No. of the new DME data
record:

7P5.907.401.Q (or higher)

Software version of the new DME data
record:

2

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Following control unit programming, the Porsche
part number can be read out of the 'DME' control
unit in the  'Extended identification' menu using
the PIWIS Tester.
0002 (or higher)
Following control unit programming, the software
version can be read out of the 'DME' control unit in
the  'Extended identifications' menu using the
PIWIS Tester.

Procedure in the event of error messages
appearing during the programming
sequence:

 Workshop Manual '9X00IN Basic instructions and

Procedure in the event of abnormal
termination of control unit programming:

Repeat control unit programming by restarting
programming.

procedure for control unit programming using the
PIWIS Tester - section on "Troubleshooting"'.

Connect electric plug connection for the fan blower again.

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Reading out and erasing fault memories
Work
Procedure:

1

In the control unit selection screen ( 'Overview' menu), press •F7“ to call up the Additional
menu.

2

Select the function “Read all fault memories and
erase if required” and press •>>“ to confirm
 Erasing fault memories.
The fault memories of the control units are read
out.

Erasing fault memories
3

Once you have read out the fault memories, delete the fault memory entries by pressing •F8“.

4

Press •F12“ (“Yes”) in response to the question as to whether you really want to erase all fault
memory entries.
The faults stored in the fault memories of the various control units are deleted.

Information
If the fault memories of individual control units (e.g. fault memories of the control units DME, Adaptive
Cruise Control (ACC), etc.) cannot be erased, proceed as follows:
•

Switch off ignition.

•

Disconnect the PIWIS Tester diagnostic connector from the diagnostic socket.

•

Lock the vehicle using the driver’s key.

•

Wait approx. 1 minute before unlocking the vehicle again.

•

Plug the PIWIS Tester diagnostic connector into the diagnostic socket again and restore communication with the vehicle.

•

Read out the fault memories of these control units again and erase the fault memories separately.

If control units are found to have faults which cannot be erased and are not caused by control unit
programming, these faults must be found and corrected. This work cannot be invoiced under the
workshop campaign number.

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Once you have erased the fault memories, select
the  'Overview' menu to return to the control
unit selection screen  Control unit selection.

Control unit selection

Performing radiator shutter adaptation
Work
Procedure:

1

Select the 'DME' control unit in the control unit selection screen ( 'Overview' menu) and press
•>>“ to confirm your selection.

2

Once the DME control unit has been found and is displayed in the overview, select the  'Maintenance/repairs' menu.

3

Select menu item  'Adaptations' and press
•>>“ to confirm your selection  DME - Adaptations.

DME - Adaptations
4

Comply with the displayed preconditions and
press •>>“ to confirm  Adaptation preconditions.

Adaptation preconditions

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Select  'Radiator shutter' adaptation so that
the corresponding text line turns blue and then
press •F8“ to start radiator shutter adaptation
 Radiator shutter adaptation.

Radiator shutter adaptation
6

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.
If radiator shutter adaptation is not completed
successfully, the adaptation must be repeated.

PIWIS instructions
7

End radiator shutter adaptation by pressing •F8“ ("Stop").

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Performing kickdown switch adaptation
Work
Procedure:

1

Select  'Kickdown switch' adaptation so
that the corresponding text line turns blue and
press •F8“ to start kickdown switch adaptation
 Kickdown switch adaptation.

Kickdown switch adaptation
2

Read and follow the instructions on the PIWIS
Tester in order to perform kickdown switch adaptation  PIWIS instructions.
To adapt the kickdown switch, press the accelerator pedal down fully when prompted by the
PIWIS Tester.
Once kickdown switch adaptation is complete,
a tick will appear in the "Value" field on the PIWIS
Tester display.
PIWIS instructions

If kickdown switch adaptation is not completed
successfully, the adaptation must be repeated.
3

End kickdown switch adaptation by pressing •F8“ ("Stop").

4

Press •