Service

Technical Information

25/22

ENU

9752

9

Various Error Messages in the Instrument Cluster: Checking Splices in the Fuse Box
(25/22)
Vehicle Type:

Macan (95B) / Macan S (95B) / Macan Turbo (95B)

Model Year:

As of 2019 up to 2021

Concerns:

Engine wire harness body

Information:

Customers complain about one or more of the following error messages or symptoms on their
vehicle.
•
•
•
•
•
•

ACC failure
Suspension system fault
All-wheel drive system failed
Parking brake fault
Vehicle will not start
12-volt vehicle electrical system battery discharged

During fault finding, one or more faulty splice points on the engine body wire harness are found
in the front left fuse box area.
Action required: In the event of a customer complaint, check the fuse box in the front plenum panel and the engine body
wire harness. One or more of the following tasks are required, depending on the result of the check:
•
•
•
•
•

Rework splice points
Rework body
Replace engine body wire harness
Replace fuse box cover
Replace fuse box

For more information, see also the overview below.

AfterSales

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Technical Information

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Overview of Tests and Repairs

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Technical Information

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Installation
Position:

Installation position of fusebox

Expose relay carrier, and check fuse box for water leaking
Work Procedure: 1

Disconnect ground terminal for vehicle electrical system battery.
For instructions, see:  Workshop Manual '270619 Removing and installing vehicle electrical
system battery'

2

Move front lid to service position.
For instructions, see:  Workshop Manual '552213 Fastening front lid (service position)'

3

Removing water box cover.
For instructions, see:  Workshop Manual '508719 Removing and installing cowl panel cover'

4

Remove filler neck from the windscreen washer system.
For instructions, see:  Workshop Manual '926019 Removing and installing windscreen washer
system'

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Technical Information

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5

Remove fuse box cover  Fuse box cover -1-.
For this, unscrew screws  Fuse box cover -2- and
remove fuse box cover  Fuse box cover -1-.

6

Disconnect relay carrier  Relay carrier -1- from
fuse box.

Fuse box cover

Relay carrier

7

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6.1

Release electric plug connections  Relay carrier -2- and disconnect them.

6.2

Unscrew nut  Relay carrier -3-.

6.3

Press locking lugs  Relay carrier -4- and remove relay carrier  Relay carrier -1- by
pulling it upwards.

Checking fuse box for water leaking in.

AfterSales

Service

Technical Information

25/22

7.1

Check the seal on the fuse box cover
 Checking fuse box cover for dirt and any
deformations.

7.2

Check the fuse box in areas  Water leak in
fuse box -5 and 6- for traces of water leaking
in.

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Checking fuse box cover

Water leak in fuse box

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Assessment

Action

( )

The seal on the fuse box cover is clean and
there are no signs of water leaking into the
fuse box.

Re-assemble the fuse box, and continue
troubleshooting in other ways.

(✗)

The seal on the fuse box cover is dirty and
there are signs of water leaking into the fuse
box.

Check engine wire harness body.
For instructions, see:  Technical Information '926019 Checking engine wire
harness'

Checking engine wire harness body
Work Procedure: 1

Cut three tie-wraps  Lower relay carrier -1- on the
wire harness using a suitable tool.

Lower relay carrier
2

Remove insulating tape and fabric tape on the engine
body wire harness between the relay carrier 
Wire harness exposed -2- and rubber sleeve Wire
harness exposed -3-.

3

Remove fabric tape on the splice connections in
areas  Installation position of splice connections
-A, B- and  Installation position of splice
connections -C- for a visual inspection and check the
splice points for corrosion.
Start with Segment C.
Wire harness exposed

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AfterSales

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Technical Information

25/22

ENU

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Installation position of splice connections

Information
If more than two splice connections are corroded, cancel the test.
In this case, the engine body wire harness must be replaced. Continue with section:  Technical Information '926019 Replacing engine compartment wire harness'

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Example of splice connection OK

Sample illustration showing splice
connection corroded
Assessment
( )

Aug 23, 2022
Page 8 of 35

Splice connections are not corroded.

AfterSales

Action
The fault is not caused by the splice
connections of the engine body wire
harness. Fault finding must be continued
otherwise. Continue with section: 
Technical Information '926019 Reworking
the old engine compartment wire harness'

Service

Technical Information

25/22

ENU

9752

(✗)

One or two splice connections are
corroded.

Repairing engine body wire harness.
Continue with section:  Technical
Information '926019 Repairing engine
compartment wire harness'

(✗)

More than two splice points are corroded.

Replace engine body wire harness.
Continue with section:  Technical
Information '926019 Replacing engine
compartment wire harness'

9

Replace engine wire harness body and fuse box, rework PVC seam on unpainted bodyshell
Information
The engine body wire harness must be replaced if more than two splice connections are corroded.
If only one or two splice connections are corroded, repair the engine body wire harness. For instructions,
see:  Technical Information '926019 Repairing engine wire harness body and reworking PVC seam'
Parts Info:

Required parts:
Part No.

Designation
– Location

Number

8K1907613C

 Cover
– Fuse box

1 piece

8K1907355F

 Housing for control unit
– Fuse box

1 piece

95B971072xx*

 Engine wire harness
– Engine compartment

1 piece

* Determine the variant of the engine body wire harness required for the respective vehicle using the
vehicle identification number in the Porsche Spare Parts Catalogue (PET2).
Required materials:

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Part No.

00004330516

Designation
– Location

Quantity

 Touch-up stick in vehicle color*
– Unpainted bodyshell in engine compartment

As required

 Coolant additive

20-liter/ 5.28 gal
container (approx.
0.5 liter/ 16.9 fl oz
required per vehicle)

Information
On Macan derivatives with V6 engines, the additional parts and materials required for removing and
installing the engine must be researched independently.
Work Procedure: 1

2

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Removing engine wire harness body.
For instructions, see:
 Workshop Manual '975219 Removing and installing engine wire harness body (R4)'
or
 Workshop Manual '975219 Removing and installing engine wire harness body'
Loosen wire harness in plenum panel.
To do this, disconnect all electric plug connections on the plenum panel wire harness  Installation
position of wire harness for plenum panel -1- as far as the fuse box section and remove the plenum
panel wire harness as far as the fuse box section.

AfterSales

Service

Technical Information

25/22

ENU

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Installation position of wire harness for plenum panel
3

Remove old fuse box.
3.1

Loosen and unscrew screws  Remove fuse
box -1- on the fuse box  Remove fuse box
-2-.

Remove fuse box

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3.2

Press locking lugs  Loosening fuse box -3upward, release and remove the fuse box 
Loosening fuse box -2-. Guide the plenum
panel wire harness out of the fuse box.

Information
The water leaking into the fuse box is caused by possible
contact between the fuse box housing and a PVC seam
on the vehicle body.  Gap from fuse box to unpainted
bodyshell with PVC seam -AThis contact can cause the fuse box to become deformed
and result in a leak on the fuse box cover.

Loosening fuse box

To prevent future water leaks, the fuse box must be replaced, and the PVC seam between the fuse box
and unpainted bodyshell must be reworked.

Gap from fuse box to unpainted bodyshell with PVC seam
4

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Rework PVC seam on the unpainted bodyshell.

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Technical Information

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4.1

Remove PVC seam in area  PVC seam -Busing a suitable tool until it is flush.

4.2

Seal the entire area at which the PVC seam
was removed using a suitable touch-up
stick for the respective vehicle paintwork to
protect the body from corrosion.

4.3

Once the paintwork has dried, install the new
fuse box. Installation is performed in reverse
order to removal.

ENU

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Installing wire harness on plenum panel. Installation is
PVC seam
performed in reverse order to removal.
Make sure that the electric plug connections are installed and locked correctly.
Information
Before installing the new engine body wire harness, check the position of the splice node.
•

If the splice node is already moved upwards  Installation position of splice node -A-, the wire
harness can be installed.

•

If the splice junction is not routed upwards as on the previous wire harness  Installation
position of splice node -B-, it must be reworked before installation in the vehicle.

For instructions, see:  Technical Information
'975219 Reworking new engine wire harness on
body'
6
Installing new engine wire harness body
For instructions, see:
 Workshop Manual '975219 Removing and
installing engine wire harness body (R4)'
or
 Workshop Manual '975219 Removing and
installing engine wire harness body'
7