Service

Technical Information

65/13 ENU

3734

3

PDK Transmission: Fault Codes P172D, P17F1 P17F2, P18CA, P18CB (65/13)

Revision:

Revision 1: December 11, 2013 amends 991 Grp 3, #65/13 dated November 19, 2013 to reflect that
the correct version of PIWIS software is 13.100.

Model Year:

As of 2013 up to 2014

Vehicle Type:

911 Carrera (991)/911 Carrera S (991)
911 Carrera 4 (991)/911 Carrera 4S (991)

Equipment:

PDK transmission (I-no. 250)

Concerns:

PDK transmission

Information:

There is a possibility of moisture condensing in the vent line of the PDK transmission under certain
environmental influences and getting into the inside of the PDK transmission through the ventilation
connections.
The transmission oil/water emulsion created as a result of this is deposited on the inner contacts of the
multiple plug connection for the PDK transmission and causes electric shunt circuits there.
If this happens, the PDK transmission can malfunction, e.g. switch to the reduced driving program
(limp-home mode).
The fault type can be recognized by the following symptoms:
•
•

Transmission warning message (yellow/red) in the instrument cluster
At least one of the following fault memory entries or fault entry combinations is stored in the fault
memory of the PDK control unit:
•
•
•
•
•

Affected
Vehicles:

P172D – Transmission temperature sensor gradient error
P17F1 – Porsche Doppelkupplung (PDK) above limit value
P17F2 – Porsche Doppelkupplung (PDK) above limit value
P18CA – Hot mode 1 GQS
P18CB – Hot mode 2 GQS

Vehicle type

Part No. of PDK
transmission

Transmission
type

Up to transmission
number

911 Carrera/
911 Carrera S
without regulated
rear-differential lock

9G1.300.011.06

CG105

1012331

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911 Carrera/
911 Carrera S
with regulated
rear-differential lock (PTV
Plus, I-no. 221)

9G1.300.031.07

CG105

3022839

911 Carrera 4/
911 Carrera 4S
without regulated
rear-differential lock

9G1.300.011.36

CG135

1003920

911 Carrera 4/
911 Carrera 4S
with regulated
rear-differential lock (PTV
Plus, I-no. 221)

9G1.300.031.37

CG135

3011278

Vehicles manufactured
between:

24.01.2013 – 08.08.2013

Information
If the fault type described here occurs on a vehicle with a PDK transmission outside of the specified
transmission number range, the fault type must first be corrected in accordance with the Guided Fault
Finding (GFF) instructions on the PIWIS Tester.
Action
Required:

If this fault type occurs on a PDK transmission with a transmission number within the transmission
number range specified above, the following measures must be carried out one after the other:
Remedial action 1:
•

Heat the contacts in the connector housing for the electric multiple plug connection on the
PDK transmission from the outside using a hot-air blower so that the condensation on the inner
contacts (which are not visible) evaporates.

•

Leave the PDK transmission for at least 4 hours (e.g. overnight) with the ventilation connection
for the clutch chamber open so that any residual condensation can escape from the PDK transmission through the ventilation connection.

Remedial action 2:
•

Replace the vent line installed on the PDK transmission with two short breather hoses.

Remedial action 3:
•
Tools:

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•

Re-program PDK control unit.
Hot-air blower, e.g. V.A.G. 1416 - hot-air blower or Nr.155-1 Pos.2 - hot-air blower

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•

65/13 ENU

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Temperature gauge, e.g. Nr.164 Pos.1 - temperature gauge or VAs 6886 - temperature
gauge
Nr.72-2 Pos.1 - Assembly pliers

Remedial action 1: Removing condensation on multiple plug connection for PDK transmission
Work
Procedure:

Preliminary work
Information
The breather hose (90° angled pipe)  Breather
hose (90° angled pipe) -1- fitted to the lower end
of the vent line for the PDK transmission must be
re-used when replacing the vent line (Remedial action
2).
It is important therefore to make sure that the
breather hose  Breather hose (90° angled
pipe) -1- is not damaged when removing the PDK
transmission.
1
1.1

Remove PDK transmission  Workshop
Manual '373419 Removing and installing
Porsche Doppelkupplung (PDK)'.

Breather hose (90° angled pipe)
1.2

Disconnect vent line  Disconnecting vent
line -1- for the PDK transmission at the
connection (angled pipe)  Disconnecting
vent line -2- for the clutch chamber.
This is necessary in order to remove all the
condensation.

Disconnecting vent line

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Information
To prevent damage to peripheral components on the PDK transmission as a result of
excessive heat, the vacuum and coolant lines must be partially removed and set aside in the
next steps.
1.3

Unscrew fastening screws  Loosening
disc valve -2- on the retaining bracket for the
upper disc valve  Loosening disc valve -1-.

1.4

Loosen spring band clamp  Loosening disc
valve -3- and pull off the coolant hose at the
upper disc valve  Loosening disc valve -A-.

Loosening disc valve

2

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1.5

Remove Y-shaped distributor hose  Setting
coolant hoses aside -2- at the electric
change-over valve  Setting coolant hoses
aside -1- for the clutch fluid heat exchanger
 Setting coolant hoses aside -A- and set
the vacuum lines aside.

1.6

Unscrew fastening screws  Setting coolant
hoses aside -3- on the retaining bracket for
the electric change-over valve  Setting
coolant hoses aside -1-.

1.7

Open bracket for coolant hoses  Setting
coolant hoses aside -4- and remove coolant
hoses.

1.8

Move coolant hoses  Setting coolant
hoses aside -5- together with the disc valve
and electric change-over valve aside as far
as required so that the top multiple plug
Setting coolant hoses aside
connection on the PDK transmission is
accessible.
Tie the coolant hoses to the side with a tie-wrap if necessary.

Remove condensation on multiple plug connection for PDK transmission

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To remove condensation adhering to the inner contacts (which are not visible) of the multiple plug
connection for the PDK transmission, the contacts in the connector housing must be heated from
the outside using a hot-air blower.
The application of heat to the outer contacts removes (evaporates) the condensation on the inner
contacts (which are not visible) of the multiple plug connection.
After heating the connector, also leave the transmission to dry off for at least 4 hours (e.g.
overnight) with the ventilation connection for the clutch chamber open to make sure that all
condensation is removed.
NOTICE
Excessive heat applied
•

Risk of damage to components



Observe temperature specifications.



Monitor temperatures.

Information
To prevent damage to the connector housing as a result of excessive heat as well as irreparable
damage to the PDK transmission, the specifications listed below must be strictly observed.
The temperature at the connector housing must also be checked at regular intervals using a
temperature gauge.
Heat multiple plug connection for PDK transmission

Values

•

Air flow temperature:

284° F (140° C) - 338° F
(170° C)

•

Duration of flow:

20 minutes

•

Distance between hot-air blower and multiple plug
connection:

15 – 20 mm

•

Required temperature at connector housing (effectiveness of
remedial action)

176° F (80° C) - 230° F
(110° C)

•

Maximum temperature at connector housing:

248° F (120° C)

•

Setting on hot-air blower V.A.G. 1416 - hot-air blower:

Setting 2.5 *

•

Setting on hot-air blower Nr.155-1 Pos.2 - hot-air blower:

Setting 1.5 - 2 *
Blower setting 3 *

* The specified settings are only for the hot-air blower mentioned here.
If a different hot-air blower is used, please read the operating instructions for the particular hot-air
blower to determine the air flow temperature settings to be used.
2.1

Set the air flow temperature on the hot-air blower and switch on the blower.

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2.2

Position the hot-air blower at a distance of 15 - 20 mm ( Heating connector contacts
-dimension A-) in front of the top PDK multiple plug connection  Heating connector
contacts -1- and hold it at this position.
Apply hot air to the contacts in the top PDK multiple plug connection continuously for 20
minutes in accordance with the specifications in the table.
Check the temperature at the connector housing at regular intervals (first after 5 minutes,
then every 5 minutes afterwards) using a temperature gauge.
To do this, remove the hot-air blower briefly (for max. 30 seconds) from the multiple
plug connection to ensure that the air flow does not result in an incorrect temperature
measurement.
The maximum temperature of 248° F (120°
C) at the connector housing must not be
exceeded.

3

2.3

Switch off the hot-air blower and let it cool
down.

2.4

Leave the PDK transmission to dry off for at
least 4 hours (e.g. overnight) with the ventilation connection for the clutch chamber open
to ensure that all condensation is removed.
Heating connector contacts

Subsequent work
3.1

Position coolant hoses  Securing coolant
hoses -5- together with the upper disc
valve and electric change-over valve for
the clutch fluid heat exchanger on the PDK
transmission.

3.2

Position coolant hoses  Securing coolant
hoses -5- in the bracket  Securing coolant
hoses -4- and close the bracket.

3.3

Secure retaining bracket for the electric
change-over valve  Securing coolant
hoses -1- on the PDK transmission with the
fastening screws  Securing coolant hoses
-3-.

3.4

Plug in Y-shaped distributor hose  Securing
coolant hoses -2- on the electric change-over
valve  Securing coolant hoses -A-.
Securing coolant hoses

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3.5

Slide coolant hose onto the upper disc valve
 Fitting disc valve -1- ( Fitting disc valve
-A-) and secure with the spring band clamp 
Fitting disc valve -3-.

3.6

Position retaining bracket for the upper disc
valve  Fitting disc valve -1- and secure it
to the PDK transmission with the fastening
screws  Fitting disc valve -2-.

3.7

Then, replace the vent line installed on the
PDK transmission with two short breather
hoses and re-program the PDK control unit.
For a description of the procedure, see the
following Remedial Actions 2 and 3.

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Fitting disc valve

Use for Remedial Action 1
Labor time: 60 TU

97814950 – Reworking wire harness for PDK transmission
Preparatory
work:
Without:

PDK transmission removed
Reading out fault memory
Creating Vehicle Analysis Log (VAL)

Invoicing:

 Damage code 3746 097 000 1

Documentation:

Document the work in the related PQIS job by specifying 37460 (Vent line) as the fault location and 9735
(Repair in accordance with PAG instructions) as the damage category.

References:

 Workshop Manual '373419 Removing and installing Porsche Doppelkupplung (PDK)'

Remedial action 2: Replacing vent line for PDK transmission
Parts Info:

Part No.

Designation
– Location

Qty.

000.043.110.30

 PDK vent repair kit

1 ea.

Contains:
9G1.321.011.03

Breather hose for PDK transmission

1 ea.*

999.385.009.01

Hexagon round-head bolt, M12 x 1.5 x 55
– Transmission to engine flange

6 ea.

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