No. 40-21

Service
Technical Information
40/21
ENU
4381
4
Complaint – Warning Message "Lift System Fault – Service Necessary" Appears in
Instrument Cluster: Observe Specified Procedure (40/21)
Model Line:
911 Carrera (992)
Model Year:
As of 2020
Equipment:
Front-axle lift function (M-no. 2UH)
Concerns:
Front-axle lift function
Information:
The white warning message 'Lift system fault – Service necessary' appears in the instrument cluster and
the entry '000302 – Measuring vehicle height fault' can be stored in the fault memory of the front-axle lift
system control unit. This fault type can occur if the vehicle was parked with the body front section raised.
Information
Always park the vehicle at the lowered position, as the upper holding position cannot be guaranteed
over a long period of time with the engine stopped depending on the system. Further information on the
front-axle lift system can be found in the relevant section of the Owner's Manual.
Action required: If both error messages are displayed, perform ride height measurement and check.
Required tools
Tools:
•
Battery charger with a current rating of at least 90 A and, if required, also with a current and
voltage-controlled charge map for lithium starter batteries, e.g. VAS 5908 battery charger,
90A
Information
The 911 (992) may be equipped with a lithium-ion 12V battery (I-no. J2A).
Lithium starter batteries must only be charged using a suitable battery charger that has a current
and voltage-controlled charge map.
For further information about the battery chargers to be used, see  Workshop Manual '270689
Charging battery/vehicle electrical system'.
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Ride height measurement and check
Work Procedure: 1
Perform ride height measurement.
1.1
Raise the body front section.
1.1.1
Start the engine.
1.1.2
Press the button for the lift system in the center console.
1.1.3
Wait until the indicator light on the button lights up continuously red.
A message briefly appears in the instrument cluster indicating that the body front
section is raised.
1.1.4
Stop the engine.
Information
The measurement is described and shown for one side as an example. The measurement on
the other side is almost identical.
1.2
Determine the ride height at the front left  Ride height measurement, front left -Z-.
1.2.1
Apply adhesive strips (e.g. adhesive tape)  Ride height measurement, front left
-1- to the wing.
1.2.2
Align the measurement tool  Ride height measurement, front left -2- vertically
and mark the measuring point  Ride height measurement, front left -3-.
1.2.3
Carefully measure the ride height and write it down.
1.2.4
Repeat the procedure for the right side.
1.3
Observe an idle period of three hours.
1.4
Repeat the measurements, write them down and compare values:
Assessment
( )
(✗)
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The ride height at the left or
right has dropped by less than
10 mm (0.4 inch).
The ride height at the left or
right has dropped by more than
10 mm (0.4 inch).
AfterSales
Action required
Please inform the customer that the vehicle
must only be parked with the front body section
lowered. Further information can be found
in the 'Front-axle lift system' section of the
Owner's Manual.
There is not necessarily a technical fault if the
fault type occurs again. The error message
can be corrected by repeated raising and
lowering of the lift system.
Replace compressor for front-axle lift system,
see  Workshop Manual '431519 Removing
and installing compressor (front-axle lift
system)'.
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Ride height measurement, front left
Required parts and materials as required
Parts Info:
Part No.
9P1412257G
WHT008676
Designation
Qty.
– Use
 Pump unit including pressure 1 ea.
line
– Front-axle lift system
 Hexagon-head bolt,
2 ea.
M12 x 1.5 x 45
– Right diagonal brace
Additional parts required (M-no. 1X1):
Part No.
PAF107190
PAF008660
Designation
– Use
 Collared cheese head bolt
with hexagon socket head
– Front drive shaft
 Hexagon nut, M10
– Front transmission support
AfterSales
Qty.
12 ea.
2 ea.
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N 10629602
992521225
PAF909910
PAF909910
Materials:
 Hexagon flange bolt,
M10 x 35
– Rear final drive bracket
 Boot
– Cardan shaft
 Cheese head bolt with
multiple-tooth head, M10 x 23
(M-no. G1L)
– Cardan shaft
or
4 ea.
 Cheese head bolt with
multiple-tooth head, M8 x 16
(M-no. G1G)
– Cardan shaft
4 ea.
1 ea.
3 ea.
Required materials (usually already available at the Porsche dealer):
Part No.
Designation
– Use
 Lubricating grease
– Front cardan shaft
PAF052735
1) approx.
Qty.
20-gram tube 1)
2 grams required per vehicle
Invoicing
Invoicing:
For documentation and warranty invoicing, enter the labor operations, PQIS coding and, if required,
relevant part numbers specified below in the warranty claim:
APOS
Labor operation
43010149
Checking levelling system
43151950
Removing and installing compressor for levelling
system
I No.
PQIS coding:
Location (FES5)
43810
Air-lift pump control unit
Damage type (SA4)
9833
Cannot establish cause, re-coded
References:
Apr 5, 2021
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 Workshop Manual '431519 Removing and installing compressor (front-axle lift system)'
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Technical Information
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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.
© 2021 Porsche Cars North America, Inc.
AfterSales
Apr 5, 2021
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