Service

Technical Information

129/18 ENU

4662

4

Complaint - Cannot Calibrate Electric Parking Brake: Re-programming electric parking
brake control unit (129/18)
Model Line:

Panamera (971)

Model Year:

As of 2017 up to 2018

Subject:

Electric parking brake control unit

Information:

If the brake shoes or disc brakes need to be replaced, calibration of the electric parking brake
cannot be carried out due to a software error.
In the event of a complaint, the electric parking brake control unit must be re-programmed.

Tools:

•
•

9900 - PIWIS Tester 3 with software version 37.600.020 (or higher) installed
Battery charger with a current rating of at least 90 A.

Work
Procedure:
NOTICE
Voltage drop
•

Risk of irreparable damage to control unit

•

Risk of damage to control unit

•

Fault entries in the control unit

•

Coding in the control unit is aborted

•

Malfunctions in control unit, even during programming



Before disconnecting the control unit, switch off ignition and remove ignition key.



Make sure that the power supply is not interrupted during programming.



Connect battery charger/power supply - Suitable for AGM Type batteries, recommended current rating of
90A fixed voltage 13.5V to 14.5V.
NOTICE

Coding will be aborted if the WLAN connection is unstable.
•

An unstable WLAN connection can interrupt communication between PIWIS Tester 3 and the vehicle
communication module (VCI). As a result, coding/programming may be aborted.



During control unit coding/programming, always connect PIWIS Tester 3 to the vehicle communication
module (VCI) via the USB cable.

AfterSales

Sep 26, 2018
Page 1 of 3

4

Service
4662

ENU

1

Technical Information

129/18

Preliminary work:
1.1

Connect a battery charger with a current rating of at least 90 A.

1.2

Place the driver's key in the console tray.

1.3

9900 - PIWIS Tester 3 with software version 37.600.020 (or higher) installed must be
connected to the vehicle communication module (VCI) via the USB cable. Then, connect the
communication module to the vehicle and switch on the PIWIS Tester.

1.4

On the PIWIS Tester start screen, call up the  'Diagnostics' menu.
The diagnostic application is then started and the control unit selection screen is populated.

2

"Electric parking brake" control unit  re-program:

Information
The procedure described here is based on the 9900 - PIWIS Tester 3 test software version
37.600.020.
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.
Menu
•

Control
unit/Function

Control units
’Overview’

2.2

 Follow instructions:

'Additional menu'

•

Campaign
number



confirm/execute

 Result/consequence of action

call up

Create Vehicle Analysis Log (VAL) if necessary and
carry out any campaigns that are available for the vehicle.

2.3
2.4

Action



Instructions/information or

2.1

•
•

Sep 26, 2018
Page 2 of 3



•F7“
•Yes“/•No“/
•F12“

‘Campaign’

select

•F12“

Value:
’L2G7X’

enter

•F12“

AfterSales

Service

Technical Information

129/18 ENU

4662

4

Read and follow the information and instructions on the PIWIS Tester during the guided
programming sequence. Then press •>>“ to continue.
During the programming sequence, the control unit is re-programmed and then re-coded automatically if necessary.
Do not interrupt programming and coding.
Once control unit programming - and coding if necessary - is complete, you will be prompted to
switch the ignition off and then back on again after a specified waiting time.
2.5

Control units
’Overview’

2.6

'Extended
identifications'

select

Software version programmed during this
campaign

0151

Electric parking brake

select

•F12“

If programming is not completed successfully (error message “Programming unsuccessful”),
programming must be repeated.
3

Subsequent work:
3.1

Read out and erase all fault memories.

3.2

Switch off the ignition.

3.3

Disconnect the PIWIS Tester from the vehicle.

3.4

Switch off and disconnect the battery charger.

End of action required.
Invoicing:

The work involved is invoiced under the labor operation:
I No.

APOS

Labor operation

46622550

Programming electric parking brake control units
For invoicing and documentation using PQIS, enter the following coding:

Location (FES5)

46620

Electric parking brake control unit

Damage type (SA4)

4000

Electrical faults

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.

© 2018 Porsche Cars North America, Inc.

AfterSales

Sep 26, 2018
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