Service

Technical Information

247/24 ENU

9804

9

Vehicle does not Start - Incorrect VIN in HCP4 Body Electronics Main Control Unit: Reset Control Unit
(247/24)
Model Line:

Macan (XAB)

Model Year:

As of 2024

Concerns:

HCP4 body electronics main control unit

Information:

The customer complains that the vehicle cannot be started.

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, reset the HCP4 body electronics main control unit.
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.)

Check fault memory entries and, if necessary, reset the HCP4 body electronics main control unit
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 Charging vehicle electrical system battery'

1.2

Place the original remote control in the 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)

AfterSales

Feb 5, 2025
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9

Service
9804

ENU

Technical Information

247/24
•

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 further.
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.
Continue with Step ⇒ 2.

2
3
4

5

Feb 5, 2025
Page 2 of 3

End readiness for operation and disconnect P90999 - PIWIS Tester 4 from vehicle.
Switch off and disconnect the battery charger.

⇒ Workshop Manual '270689 Charging vehicle electrical system battery'
Reset the HCP4 body electronics main control unit by disconnecting the 12-V vehicle electrical system
battery.
4.1

Loosen the ground strap on the vehicle electrical system battery.
For instructions, see: ⇒ Workshop Manual '270619 Removing and installing vehicle electrical
system battery'

4.2

After a waiting time of 10 minutes, fasten the ground strap to the vehicle electrical system
battery.
For instructions, see: ⇒ Workshop Manual '270619 Removing and installing vehicle electrical
system battery'

Connect and switch on the battery charger.

⇒ Workshop Manual '270689 Charging vehicle electrical system battery'

6

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

7

Carry out airbag zero-position calibration.

AfterSales

Service

Technical Information

247/24 ENU

9804

9

7.1

Select the "A irbag" control unit in the control unit selection screen ("Overview" menu) and press
•F12“ ("Next") to confirm your selection.

7.2

Select the menu “Service/repairs” then select the “Teach combination sensor (J234)” function
and press •F12“ (“Next”) to confirm your selection.

7.3

Follow the instructions on the PIWIS Tester.

8

Read out and delete all control unit fault memories.

9

End diagnostic application, end readiness for operation, disconnect P90999 - PIWIS Tester 4 from
vehicle.

10 Switch off and disconnect the battery charger.
⇒ Workshop Manual '270689 Charging vehicle electrical system battery'

Labor position and PCSS encryption
Labor position:
APOS

Labour operation

I No.

98042541

Check fault memory entries and reset the body
electronics main control unit
PCSS encryption:

Location (FES5)

98040

Body electronics main control unit

Damage type (SA4)

1142

Incorrect coding

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.

© 2025 Porsche Cars North America, Inc.

AfterSales

Feb 5, 2025
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