9

Bulletin #: 2503.1

Advanced Technical Information

Part ID: 9802

Troubleshooting Advanced Driver Assistance Systems (ADAS)
Vehicles Affected
Models

Model Year

Model Type

VIN Range

Vehicle-Specific Equipment

Cayenne

As of 2024

9YA, 9YB

N/A

N/A

Macan Electric

As of 2024

XAB

N/A

N/A

Taycan

As of 2020

Y1A, Y1B, Y1C

N/A

N/A

911

As of 2020

992

N/A

N/A

Panamera

As of 2024

YAA, YAB

N/A

N/A

Revision History
Revision

Release Date

Changes

0

February 14. 2025

Original document

1

June 27, 2025

Revised Part ID
Revised Document to focus on Troubleshooting ADAS

Condition
The following documentation aims to help Porsche Center service and support personnel with relevant and
necessary information to assist customers with Advanced Driver Assistance System (ADAS) complaints.
New Porsche vehicles implement technology, features, and functions at different times due to multiple factors such
as vehicle release timing or model year change timing. Connected car systems will also have an effect on ADAS
features and functions. The applicable Connect Release Version should be identified to associate the appropriate
external systems and services with the specific vehicle in diagnosis.
At the same time, Porsche makes considerable effort to implement features and functions so they appear familiar to
customers with experience in other Porsche vehicles. Therefore, while function names and user interfaces are
often the same across different model years and model lines, there are often significant differences in vehicle
technology or application.

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9

Bulletin #: 2503.1

Advanced Technical Information

Part ID: 9802

Troubleshooting Advanced Driver Assistance Systems (ADAS)
Technical Background
Advanced Driver Assistance Systems (ADAS) rely upon a complex network of sensors, cameras, control units,
software, and backend system data to function. System functionality depends upon technology both in and
out of the vehicle. Refer to the system information applicable to the specific model year, model type, and both
standard and optional equipment.
“Connect Release 3” refers to vehicles with Software Cluster 3X (32, 33, 35, 37, 39, 3B…) found in Cayenne and
Taycan, for example. “Connect Release 4” refers to vehicles with Software Cluster 4X (43, 46). For further
information about Connect Releases and subsequent infotainment features and functions, please refer to the PPN
Online System SoliD > Knowledge Hub and the “Big Picture” overview files contained within SoliD.

Service Information
Ensure the specific conditions surrounding the customer complaint are understood. Customer-supplied videos or
photos can help to ensure the exact messages and displayed text are understood. It is usually best to duplicate
customer complaints first-hand to ensure clear understanding of the customer complaints.
In many cases, warning messages may appear for assistance systems which are functioning as designed (examples
below). In other cases, warnings for system operation remain under analysis (e.g., TI 11/25) or a resolution
is provided (e.g., ATI 2121.1).
The following list of Macan EV (H2 / PPE Platform / E³ Architecture) topics are known and accepted as normal
operation:

1.
Customer states when attempting to activate Adaptive Cruise

Control (ACC), the function is blocked and the instrument

cluster displays the message, “Adaptive Cruise Control not
available|Driver’s Seat Belt unbuckled” (Figure 1), but the

driver’s seat belt is confirmed to be buckled.

a.
This message appears due to the vehicle ECU counting

numerous drive cycles with the driver’s seat belt

unbuckled - including drive cycles that occur before

customer delivery (e.g., anywhere after the production

line in Germany). Software updates are planned for

release in calendary year 2025 to minimize unnecessary
occurrence of this warning.

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Figure 1

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Bulletin #: 2503.1

Advanced Technical Information

Part ID: 9802

9

Troubleshooting Advanced Driver Assistance Systems (ADAS)

2.
Customer states the Adaptive Cruise Control function is
greyed out and cannot be activated (Figure 2).

a.
Function restrictions may exist while vehicle systems

automatically download maps and ADAS operating

parameters based upon vehicle GPS location and data

connection provided via 4GLTE/5G. For example,

this situation occurs during the first 25-50 miles of

vehicle operation following PDI. After automatic setup

is complete, ACC and related ADAS functions become
available.

b.
The following fault may be stored in the control unit

Long-distance radar distance measurement sensor (J428)

while the system updates: B199A00_FFFE71, “Online Remote
Update in progress.”

Figure 2

3.
Customer states the Lane Change and Turn Assist functions are not working. The

exterior mirrors each contain 3 Lane Change and Turn Assist warning lights. These

assistance system functions are blocked if the exterior mirror positions are unknown.

a.
Fold the exterior mirrors in and out electrically via the driver’s door switch to teach the
exterior mirror position

b.
Turn the LCA system Off and On again

c.
Verify the LEDs in the exterior mirrors light up

d.
Re-check Lane Change and Turn Assist functionality
The following topics for other vehicles (MLBevo architecture, e.g. E3/992/J1) are known and accepted as
normal operation:

1.
Customer states the Intersection Assist function continuously flashes when activated in the

PCM > Car > Assist menu (Figure 3). No relevant fault codes are stored in the zFAS / Assistance
System control unit.

a.
The PCM message “Function not available” may also be displayed, but only if the

timing on activation will be done when the status line disappears, and this is only a

default reaction of the PCM which occurs sporadically. The behavior (“Function not

available” message) is only present for a few minutes after T15 on, and the system
is otherwise fully functional.

b.
This condition only occurs with zFAS Assistance system control unit Software

Version 0371 (for example, like found in model year 2022 and 2023 Cayenne (E3))

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Bulletin #: 2503.1

Advanced Technical Information

Part ID: 9802

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Troubleshooting Advanced Driver Assistance Systems (ADAS)

Figure 3

2.
Customers complain of 3 select white warning messages presented in the instrument cluster that
read, “Emergency Stop Function currently not available | Driving permitted”, “Active Lane

Keeping currently not available | Driving permitted”, and “Assistance Systems currently restricted

| Sensor is dirty, observe messages in central display” (Figures 4, 5, 6), along with subsequent

yellow warning indicators for the affected driver assistance systems (Figure 7).

a.
In this example, obstructions of the front camera (e.g., dirt, ice, snow) may restrict the

functionality of the front camera and result in these warnings. Please discuss these

obstructions with the customer.

i.
Dirt, frost, or snow/ice on the windscreen at the front-facing camera for driver

assistance systems will restrict the camera from being operationally active, and

in many cases this is only temporary. This results in a temporary white warning in

the instrument cluster to instruct the driver that these functions are not available

while the camera is obstructed. In such cases, these messages and the affected

assistance systems are functioning as designed.
ii.
Check for any dirt, debris, or haze/fog on the interior surface of the windshield
glass between the front-facing camera and the glass. If the glass is dirty or hazy, it

may be necessary to remove the front-facing camera to clean the glass before
reinstalling the camera.
b.
For the “Emergency Stop Function currently not available” warning, see Owner’s Manual

section “Occupant protection” => “Emergency Stop Function” => “System limitations” for
more information.

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Bulletin #: 2503.1

Advanced Technical Information

Part ID: 9802

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Troubleshooting Advanced Driver Assistance Systems (ADAS)
c.
For the Active Lane Keeping (ALK) warning, see Owner’s Manual section “Driving

Assistance” => “Lane Keep Assist” => “Activating and deactivating Lane Keep Assist”

(Figure 8) and Section “Driving Assistance” => “Active Lane Keeping” => “System

Limitations” (Figure 9) for more information:

d.
The third white warning of Figure 6 of “Assistance Systems currently restricted” always

accompanies one of the other listed white warnings.

e.
If it is determined that there was no obstruction to the camera at the time of the warnings,
continue with diagnosis.

Figure 4

Figure 5

Figure 6

Figure 7

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Bulletin #: 2503.1

Advanced Technical Information

Part ID: 9802

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Figure 8

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Advanced Technical Information

Part ID: 9802

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Figure 9

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Bulletin #: 2503.1

Advanced Technical Information

Part ID: 9802

Figure 10

The following topics for other vehicles (MLBevo architecture, e.g. E3/992/J1) are known and under
analysis:
1.
TI 03/23 – Various Error Messages Regarding Driver Assistance Systems in the Instrument Cluster
(Part ID 9102)
2.
TI 11/25 - Various Error Messages regarding Driver Assistance Systems in the Instrument Cluster /

Passive Fault Memory Entry “C12D5FA” in the Driver Assistance System Control Unit (ZFAS)
(Part ID 9102)
The following topics for other vehicles (MLBevo architecture) are known and guidance is provided to address
complaints:
1.
ATI 2121.1 - 9YA ACC Dynamic Calibration Fault C110300 (Part ID 9102)

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Bulletin #: 2503.1

Advanced Technical Information

Part ID: 9802

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The following documents serve as additional references to ADAS systems and functions:
1.
Porsche Technology Index. This is a guide to assist in finding information about various Porsche

models, systems, and technologies in all SIT manuals since the introduction of the 986.
2.
Attached PDF with Cayenne (E3-I) ADAS function and sensor information. Note: Not all functions

are available in all markets. For example, complete Matrix headlight functionality is not operational
in USA.

3.
PCSS > Information media > Standard Forms (SF) > Human Error Check and Automated Parking
Questionnaire are available to assist information gathering and troubleshooting
4.
Connect “Release” information - see PPN > Online Systems > SoliD > Big Pictures for Porsche
Connect and Charging

a.
Contact your Porsche Center PPN Coordinator to request access to SoliD
5.
Owner’s Manuals via manual.porsche.com
6.
Service Information Technik (SIT) via PPN > Academy > Technical Training > SIT – Service
Information Technik, notably:
a.
2021 Taycan (Y1A/J1-I MOPF) – 9.2 Porsche InnoDrive. “Introduction of the second

generation of Porsche InnoDrive… available since the end of [CY]2020 and initially be

available for 992 and J1 models”
b.
2024 Cayenne (9YA.2/E3-II) – 9.8 Driver Assistance Systems. “The 2024 Cayenne has

more extensive assistance systems [as standard] with additional functions to offer

the customer more comfort and safety.”
c.
2024 Panamera (YAA/G3) – 9.7 Driver Assistance Systems. “The 2024 Panamera has

expanded assistance systems.. The sensor set was adopted from the 2024 Cayenne.”
d.
2025 Taycan (J1.2/Y1A.2) – 9.7 Driver Assistance Systems. “For the 2025 Taycan, the

driver assistance systems have been extended with new functions. Drowsiness detection

is now standard. The ACC Premium package was supplemented with Swerve Assist. In the

USA, the ACC high-end package receives the optimized Traffic Jam Assist Extended.”
e.
2025 911 Carrera GTS (992.2) – 9.4 Driver Assistance Systems. “The offer concept for the

driver assistance systems (DAS) of the 2025 911 Carrera is shown … available depending

on equipment and country. Some functions will not be fully usable until later (e.g.,

drowsiness detection, which currently uses other input signals due to a driver observation

camera that will not be installed until later). If such special features or limitations

apply, they are explained in the respective chapter.”
f.
2024 Macan Electric (H2/XAB) – 9.10 Driver Assistance Systems. “The 2024 Macan

Electric has a completely new network architecture with E³, which will act as the basis for

many new assistance systems – and also for the first autonomous functions in the coming

years. In addition, zFAS, the former central control unit of the driver assistance systems, has

been replaced by the new HCP2 driver assistance main control unit (J1274)…”

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Bulletin #: 2503.1

Advanced Technical Information

Part ID: 9802

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g.
MY25 Updates / Changes

i.
Icon changed for lateral control (LCA / LDW / LKA /
ALK) (Figure 11)

ii.
E3PA: Surround View with Active Parking Support
fitted as standard equipment
h.
MY26 Updates / Changes
Figure 11
i.
“As of CW48 production, Warn and Brake assist has an

updated camera installed near the rear view mirror base”
ii.
“As of CW48 production, a Driver Awareness Detection camera is installed on top of the

steering column. In addition to the current Driver Fatigue detection features, the driver is

now also warned of microsleep and visual distraction if their gaze is not directed at the road

for a certain period (warning after 6 seconds at 12-31 mph (20–50 km/h) or after 3.5

seconds at speeds > 31 mph (50 km/h))”

Search Items

Cayenne, Taycan, 911, Panamera, Macan (H2), Front Camera, Assistance Systems, Advanced Driver Assistance
Systems, ADAS, zFAS, lane change assist, traffic jam assist, LCA, LDW, LKA, ALK, TJA, ACC, adaptive cruise control

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.

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