Service

Technical Information

51/18

ENU

5789

5

Symptom - Body exterior - Locking Beep Not as Specified (I-no. 7AH/7AL):
Re-programming Rear-end Electronics Control Unit (SY 51/18)

Revision:

This bulletin replaces Group 5, #51/18, dated September 11, 2019.
- 911/Boxster/Cayman/Cayenne model lines were added

Model Year:

As of 2016

Model Line:

Macan (95B)
911 (991)/Boxster/Cayman (981/982)
Cayenne (92A)

Equipment:

Alarm system (I-no. 7AH/7AL)

Subject:

Rear-end electronics control unit (with software version: 3200 / 3300 / 3600)

Symptom:

When locking the vehicle, the locking beep can sometimes be heard only once instead of twice.

Cause:

Insufficient communication between the horn and rear-end electronics control unit can cause the locking
beep to sound only once.

Remedial
Action:

Re-program the rear-end electronics control unit.

Tools:

•
•

9900 - PIWIS Tester 3 with software version 38.750.000 (or higher) installed
Battery charger with a current rating of at least 90 A or equivalent. We recommend VAS 5908
-battery charger 90 A, for example

Work
Procedure:
NOTICE
Coding/programming will be aborted in the event of low-voltage.
•

Increased power consumption during diagnosis can cause a drop in voltage, which can result in one or
more fault entries and abortion of the coding process.



Before commencing work, connect a suitable battery charger with a charging current of at least 90 A to
the jump-start terminals in the engine compartment.

AfterSales

Jan 9, 2020
Page 1 of 4

5

Service
5789

ENU

Technical Information

51/18

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.
1

Preliminary work:
1.1

Connect a battery charger with a current rating of at least 40 A.

1.2

Switch on the ignition using the original driver's key. On vehicles with “Porsche Entry &
Drive”, do this by replacing the control unit in the ignition lock with the original driver's key if
necessary.

1.3

9900 - PIWIS Tester 3 with software version 38.750.000 (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

"Rear-end electronics" control unit  re-program:
Information
The procedure described here is based on the 9900 - PIWIS Tester 3 software version
37.600.010.
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.
Menu
•

Jan 9, 2020
Page 2 of 4



Control
unit/Function

Action



Instructions/information or

AfterSales

•



 Result/consequence of action

confirm/execute

Service

Technical Information

51/18

2.1

Control units
’Overview’

2.2

 Follow instructions:
•
•

'Additional menu'

call up

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

2.3

‘Campaign’

ENU

5789

5

•F7“
•Yes“/•No“/
•F12“

select

•F12“

enter

•F12“

Campaign
number
•
•
2.4

•

Macan
911 (991)
/Boxster/Cayman
(981/98
2)
Cayenne
E2 II (92A)

Value:
•
•
•

95B 'S3T6P'
991/981/982
'T8M5L'
92A 'N1D6Z'

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

3610

Rear-end electronics.

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

For vehicles with Porsche "Entry & Drive", replace the original vehicle key in the ignition lock
with the control panel again.
Switch off and disconnect the battery charger.

3.5

End of action required.

AfterSales

Jan 9, 2020
Page 3 of 4

5

Service
5789

Invoicing:

ENU

Technical Information

51/18

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

APOS

Labor operation

57892550

Programming control units for rear-end electronics
For invoicing and documentation using PQIS, enter the following coding:

Location (FES5)

91500

Buzzer

Damage type (SA4)

1614

Function not as specified

References:

 Workshop Manual '578955 Replacing control unit for rear-end electronics'

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.

© 2020 Porsche Cars North America, Inc.

Jan 9, 2020
Page 4 of 4

AfterSales