Service

Technical Information

247/24 ENU

9804

9

Vehicle has No Power Steering and Multiple Yellow Warning Messages (247/24)
Change overview:
Release

Date

Modification

1

02/05/2025

•

First publication

2

04/24/2025

•

Action revised

Model Line:

Macan (XAB)

Model Year:

As of 2024

Concerns:

HCP4 body electronics main control unit

Information:

The customer complains that the vehicle has no power steering.

Cause:

Various fault memory entries are identified in various control units in the workshop.

Action:

If there is a customer complaint, check fault memory for the above-mentioned fault memory entries and, if
necessary, re-programme the HCP4 body electronics main control unit.
Information
The minimum programming/coding requirement is the PIWIS Tester software release: 43.200.021

Information
It is not necessary to replace the HCP4 body electronics main control unit for this complaint. Bus idle does
not provide any remedy for this complaint.

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 Charge battery and vehicle electrical system'
Torque wrench, 2 – 10 Nm (1.5 – 7.5 ftlb.), e.g. V.A.G 1783 - torque wrench, 2 – 10 Nm (1.5 – 7.5
ftlb.)

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Technical Information

247/24

Checking fault memory entries
Work Procedure: 1

Read out the fault memory and check for the following fault memory entries.
1.1

Connect and switch on the battery charger.
⇒ Workshop Manual '270689 Charge vehicle electrical system battery'

1.2

Place original remote control in emergency start tray.

1.3

Connect the P90999 - PIWIS Tester 4, establish readiness for operation and start the diagnostic application.

1.4

Read out the fault memory and check for the following fault memory entries:
HCP1 drive / chassis main control unit
•
•

B1AECF0 – Active cross-exchange protection or faulty coding (00051C)
C054600 – Chassis number, not stored / incompatible (00051D)

Airbag control unit
•
•
•

C115E54 – Control unit - internal combination sensor, not taught (515E54)
B18B0F0 – Theft protection functions (VKMS) not taught (98B0F0)
B1AECF0 – Theft protection functions (VKMS), active (9AECF0)
Assessment
( )

The fault memory entries listed above are
not available in the fault memory.

Action
The complaint in this technical information is not caused by an incorrect
vehicle identification number in the
HCP4 body electronics main control
unit.
Continue troubleshooting elsewhere.
End of action.

✗)
(✗

The fault memory entries listed above are
available in the fault memory.

Vehicle identification number in HCP4
body electronics main control unit not
OK.
Re-programme the HCP4 body electronics main control unit.
Continue ⇒ Technical Information
'270689 re-programming with the
HCP4 body electronics main control
unit'.

Apr 24, 2025
Page 2 of 10

AfterSales

Service

Technical Information

247/24 ENU

9804

9

Re-programming HCP4 body electronics main control unit
NOTICE
Sitting inside the vehicle during the update
•

Abort update by automatically activating the ignition

Þ
⇒

Avoid sitting inside the vehicle during the update.
NOTICE

The specified update process was not followed
•

Update cancelled

•

Destruction of control units

Þ
⇒

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

Þ
⇒

Do not replace ignition without instructions from PIWIS Tester

Þ
⇒

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:
•

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)

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+).

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Technical Information

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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

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Page 4 of 10

Prepare programming of the (HCP4) body electronics main control unit.
2.1

Start new logging via •P2“.

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.

AfterSales

Service

Technical Information

247/24 ENU

9804

9

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 2.5.1 to 2.5.3 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-programme (HCP4) body electronics main control unit.
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 (HCP4) body electronics main control unit is then re-programmed as per the menu.
After programming 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

6

7

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

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

5.2

End the readiness for operation of the vehicle (ignition off).

5.3

Wait 5 minutes with the driver’s door open.

5.4

Establish readiness for operation (ignition on).

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.

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

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Technical Information

247/24

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 menu item “Read/delete all fault memories” and press to confirm.

8.4

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