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WF50 - Re-programming Front-end Electronics 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 S E-Hybrid (92A)

Concerns:

Front-end electronics control unit

Information:

This is to inform you of a voluntary Workshop Campaign on the above-mentioned vehicles. The DME
control unit and front-end electronics are not switched to sleep mode on the affected vehicles
when all the following conditions are met:
•
•
•

•

Ignition is switched off.
Filler flap release is actuated.
Fuel tank readiness is not yet reached because the pressure in the fuel tank has not yet been
reduced. The procedure can take up to 150 seconds, depending on the pressure conditions in the
fuel tank (warning in instrument cluster indicates "Establishing tank readiness").
Vehicle is locked within 6 seconds.

This software error in the front-end electronics prevents the control units from entering sleep mode. As a
result, the closed-circuit current draw is too high until the ignition is switched on.

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Information
The software to be programmed depends on the hardware version of the front-end electronics
control unit.
To ensure that the software that is programmed is compatible with the relevant hardware version,
the affected vehicles are assigned to different campaign scopes.
Before carrying out the campaign, it is important therefore to check the campaign scope for the
vehicle by entering the vehicle identification number of the respective vehicle in PIWIS  'Vehicle
information' menu. The front-end electronics control unit must then be re-programmed by entering the
programming code specified in the assigned campaign scope:
•

Scope 1:  Technical Information 'WF5000 Scope 1 - Re-programming front-end electronics control
unit using software version 3300'.

•

Scope 2:  Technical Information 'WF5000 Scope 2 - Re-programming front-end electronics control
unit using software version 2930'.

Re-program the front-end electronics control unit using a modified data record.
Information
The total time required for programming and coding the control unit is approx. 5 minutes.
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 797 vehicles in North America.

Tools:

•
•

Claim
Submission:

See Attachment “A”.

9818 - PIWIS Tester II with PIWIS Tester test software version 15.700 (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.

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 battery charger or power supply, suitable for AGM
type batteries, recommended current rating of 70A fixed voltage 13.5V to 14.5V.

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

An unstable Internet 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.
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 vehicle key. To do this, replace the original vehicle key in the
ignition lock with the plastic key fob if it was previously removed at the start of this procedure.

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"'.

Scope 1 - Re-programming front-end electronics control unit using software version 3300
Information
The procedure described here is based on the PIWIS Tester II software version 15.700.
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 the front-end electronics 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:
Required PIWIS Tester software version:

15.700 (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:

T4U6W

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Read and follow the information and instructions
on the PIWIS Tester during the guided
programming sequence.
During the programming sequence, the front-end
electronics control unit is re-programmed and
then re-codedautomatically.

Programming sequence:

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

5 minutes

Software version programmed during this
campaign:

3300

Procedure in the event of the error
message "No suitable programming
rules found. Cause: Part number of the
front-end electronics control unit is not in
the programming rules":

Following control unit programming, the software
version can be read out of the front-end electronics
control unit in the  'Extended identification' menu
using the PIWIS Tester.
Check that the programming code used corresponds to the campaign scope assigned for the
relevant vehicle.
•
•
•

ACTUAL software version: 3200
REQUIRED software version: 3300
Programming code: T4U6W

or:
•
•
•

ACTUAL software version: 2900
REQUIRED software version: 2930
Programming code: N7C4U

Procedure in the event of other 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 "Fault finding"'.

When programming is complete, continue with  Technical Information 'WF5000 Reading out
and erasing fault memories'.

Scope 2 - Re-programming front-end electronics control unit using software version 2930
Information
The procedure described here is based on the PIWIS Tester II software version 15.700.
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.

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Work Procedure: 1

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Re-program the front-end electronics 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:
Required PIWIS Tester software version:

15.700 (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:

N7C4U

Programming sequence:

Read and follow the information and instructions
on the PIWIS Tester during the guided
programming sequence.
During the programming sequence, the front-end
electronics control unit is re-programmed and