Service

Technical Information

228/24 ENU

ARC5

9

ARC5 – Re-Coding Main Control Unit for Body Electronics (HCP4) and Control Unit for
Headlights (Recall 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.

Model Year:

As of 2024 up to 2025

Model Line:

Macan Electric (XAB)

Country /
Market:

USA / Canada / Puerto Rico

Concerns:

Main control unit for body electronics (HCP4) and headlight control units (MX1, MX2, MX14,
MX15)

Cause:

Due to faulty coding of the main control unit for body electronics (HCP4) and the control units
for headlights or auxiliary headlights, the headlights are activated with too high a current when
the high beam is used.
As a result, the statutory limit of 120 lux for high beam brightness in the USA, Canada and Puerto Rico
markets is exceeded.

Action:

Re-code main control unit for body electronics (HCP4).
For vehicles with country-specific equipment C36 Canada, the control units for headlights (MX14, MX15)
and the control units for auxiliary headlights (MX1, sMX2) must also be re-coded.
Information
The minimum programming requirement is PIWIS Tester software release 43.000.040 (or higher).

Information
The prerequisite for this action is the successful implementation of the campaign WRM0 – Update to
software network VR28.11.
If software network 28.11 has not yet been installed on the respective vehicle, this must be done before
carrying out the present action here.
Affected
vehicles:

Only vehicles assigned to the campaign (see also PCSS Vehicle Information).

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Required tools
Tools:

•
•

P90999 - PIWIS Tester 4
Battery charger with a current rating of at least 90 A, e.g., VAS 5908 - 90-A battery charger.
For further information about the battery chargers to be used, see the corresponding Workshop
Manual.  Workshop Manual '270689 Charging vehicle electrical system battery'

Re-coding main control unit for body electronics (HCP4) and, if necessary, the control units for headlights (MX1, MX2, MX14, MX15)
NOTICE
Sitting inside the vehicle during the update
•

Abort update by automatically activating the ignition



Avoid sitting inside the vehicle during the update.
NOTICE

The specified update process was not followed
•

Update cancelled

•

Destruction of control units



Observe and follow the process displayed for the update and instructions for the PIWIS Tester



Do not replace ignition without instructions from PIWIS Tester



Do not repeat the update procedure unless a failed update is displayed on the PIWIS Tester

Information
Vehicle update – general information
The entire vehicle network will be checked for a necessary update or computed to ensure fault-free functioning of the vehicle. The following preparations must be made:

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•

Latest release on PIWIS Tester 4 and PiUS available

•

Vehicle is fully constructed

•

VCI and PIWIS Tester 4 must be connected to each other via workshop WiFi

•

The user must be logged in to the PIWIS Tester 4 in the PPN

•

Vehicle must be supported by an external charger

•

Seat heating and seat ventilation must not be active

•

Place the original hand-held transmitter in the emergency start tray (see Workshop Manual)

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Technical Information

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The vehicle performs the update independently. The current status can be retrieved on the diagnostic
tester or on the front display and control unit (R238) under Messages (RPC+).

Information
During the update process, all displays in the vehicle (instrument cluster, central display and passenger
display) are occasionally switched off. The update process nevertheless continues. The ignition
sequence must not be changed.
If WiFi coverage is insufficient, the connection between
the PIWIS Tester and VCI may be interrupted (battery
charge indicator inactive on the Tester display at the top
right). The vehicle will nevertheless continue the update
independently. In the meantime, no entry must be made
on the PIWIS Tester, and the programming or coding
must not be restarted. In such a case, the progress of
the update can still be followed inside the vehicle via the
central display by activating the “Messages” tile.
Work Procedure: 1

Observe preconditions for control unit programming
and coding.
Update progress on central display
 Technical Information '9X10IN Basic instructions
and procedure for control unit programming using the PIWIS Tester'
Information
An active Internet connection with the PIWIS Tester must be maintained.
The technician must log in to PPN with the PIWIS tester.
The PIWIS Tester must not be charged using the cigarette lighter!

Information
Before starting the diagnosis, it is essential for an ignition change to be performed on the
vehicle.
After starting the diagnosis, the VCI is automatically initialized and the control unit data is loaded.
For additional information on the programming procedure and if the process is interrupted, see 
Technical Information '9X10IN FAQs on control unit programming'
2

Prepare coding of the main control unit for body electronics (HCP4) and, if necessary, the control
units for headlights (MX1, MX2, MX14, MX15).
2.1

Start new logging via •P2“.

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2.2

As soon as the control unit overview is displayed, open the additional menu by pressing
•F7“.
An overview of all campaigns to be carried out for the respective vehicle is then displayed
automatically.

2.3

Confirm the campaigns to be carried out for the respective vehicle by pressing •F12“, but
do not start for the time being.

2.4

During the automatic integration test on the PIWIS Tester, press •F11“ to cancel it.

2.5

If necessary, deactivate Transport mode.
Information
For this update procedure, the respective vehicle no longer needs to be in transport mode.
To do this, deactivate Transport mode as follows.
On vehicles without active Transport mode, steps 2.6.1 to 2.6.3 can be skipped.
2.5.1

Press •F7“ to call up the additional menu.

2.5.2

In the displayed additional menu, select and confirm the “Vehicle handover”
menu item.

2.5.3

Select “Deactivate Transport mode” and confirm by pressing •F8“.
Then select ‘No’ when the query as to whether it is a new vehicle appears and end
the vehicle handover using the PIWIS Tester.

3

End readiness for operation (ignition off) and restore it after waiting approx. 30 seconds (ignition
on).

4

Re-code the main control unit for body electronics (HCP4) and, if necessary, the control units for
headlights (MX1, MX2, MX14, MX15).
4.1

Press •F7“ to call up the additional menu.

4.2

In the displayed additional menu, select and confirm the “Control unit programming and
coding (campaign)” menu item.
The main control unit for body electronics (HCP4) and, if necessary, the control units for
headlights (MX1, MX2, MX14, MX15) are then re-coded with menu guidance.
After coding is completed, a corresponding confirmation is displayed on the PIWIS Tester.
Information
The entire update process for this action takes approx. 16 minutes.
However, the download speed of the update package depends on the performance of the
local network and can vary accordingly.

5

After coding is completed, perform a vehicle bus idle.
5.1

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Go back to the control unit overview by pressing •F11“.

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5.2

End the vehicle’s readiness for operation (ignition off).

5.3

Wait 5 minutes with the driver’s door open.

5.4

Establish readiness for operation (ignition on).

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Check readiness for driving the vehicle.
6.1

Operate the footbrake and keep it pressed.

6.2

Use the selector lever to engage driving gears D and R one after the other. The selected
gear must be displayed in the gear indicator on the instrument cluster.

6.3

Activate the parking lock via button P.

7

End readiness for operation (ignition off) and restore it after waiting approx. 30 seconds (ignition
on).

8

Read out and delete fault memories.
Information
If control units are found to have faults that are not caused by control unit coding, they must first be
found and corrected. This work cannot be invoiced under the workshop campaign number.

Information
Due to the vehicle diagnosis and coding, fault memory entries that do not indicate an actual fault in
the vehicle can be stored.
These fault memory entries can be deleted for the most part after repeated starting and a test drive.
The following fault memory entry is always stored as part of a vehicle diagnosis with the PIWIS Tester
and does not represent an actual fault:

9

Control unit

Fault code

Description

“various” control units

B184C00

Protection of vehicle diagnostics, actuation
active

8.1

If necessary, restore communication of the PIWIS Tester with the vehicle.

8.2

Press •F7“ to call up the additional menu on the PIWIS Tester.

8.3

Select and confirm the “Read/delete all fault memories” menu item.

8.4

Press •F8“ to delete the displayed fault memory entries.

If necessary, perform the vehicle handover according to the menu guidance using the PIWIS Tester.

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Technical Information

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Warranty processing
Information
The specified labor times were determined specifically for carrying out this campaign and include all
necessary preliminary and subsequent rework. The labor times may differ from those published in the
Labor Operation List in the PCSS.
Scope 1:

Re-code main control unit for body electronics (HCP4)
Labor time:
Re-code main control unit for body electronics (HCP4)
Includes:
Connecting and disconnecting battery charger
Connect and disconnect PIWIS Tester
Deactivate vehicle transport mode (if required)
Reading out and deleting fault memories

Labor time: 74 TU

 Damage number ARC5 099 000 1
Scope 2:

Re-coding main control unit for body electronics (HCP4) and control units for headlights (MX1,
MX2, MX14, MX15)
Labor time:
Re-coding main control unit for body electronics (HCP4) and control units
for headlights (MX1, MX2, MX14, MX15)
Includes:
Connecting and disconnecting battery charger
Connect and disconnect PIWIS Tester
Deactivate vehicle transport mode (if required)
Reading out and deleting fault memories