No. 84-17

Symptom-based workshop manual
3
Service
84/17
3995
Noise Symptom/Jerking or Spare Parts Requirements - Clicking Noise/Rough-Running
Engine/Jerking Under Load With Respect to Transfer Gear: Programming All-Wheel Drive
Control Unit/Checking Transfer Gear (SY 84/17)
ENU
Information
These symptom-based repair instructions replace the instructions dated September 22, 2017.
Changes/additions:
Only modified transfer gears with GNC-coated plates are supplied from now on.
 In the event of spare parts requirements for the control unit (contained in the servo motor), the
existing type of transfer gear (with or without GNC-coated plates) must be checked and the part
number of the control unit must be selected accordingly.
 A transfer gear with GNC-coated plates is identified by the PR number "LU2".
 For more information, see also "Spare parts requirements" and "Software".
Information
Currently, a high percentage of warranty returned transfer cases are evaluated as "OK" during
testing by the supplier.
For this reason, the two previous symptom-based repair instructions are being replaced by these
symptom-based repair instructions:
1.  "Eliminating noise symptoms - Re-programming control unit for all-wheel drive (Creaking noise from
around the transfer case/SY0416) –  only relevant for vehicles from model year 2015 to 2016
and
2.  "Eliminating symptoms - Engine: Replacing transfer case (Rough-running engine, vehicle jerks
under load/SY2516)
in Repair Group 39 - Final drive.
Information
The "transfer case" is designed as an active all-wheel drive system that is dynamically adapted to the
respective driving state.
Power transmission between the front and rear axle is controlled electronically via the "all-wheel
drive servo motor (transfer case)" and the multi-plate clutches integrated in the transfer case.
 On all-wheel drive vehicles, the drive train can become strained at low speeds and when the
steering is turned sharply when "Off-road mode" is activated, depending on design.
•
Under extreme conditions, the drive train can also become strained when "Off-road mode" is
deactivated.
•
Customers with little experience with all-wheel drive vehicles can interpret this behavior as a
fault, which in turn can result in incorrect diagnoses in the workshop.
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Change overview
Version
Date
Change
0
2017
•
First publication
1
November 2, 2017
•
The Information note
under “Symptom 1”,
the first bullet point was
amended to read: “that
were produced from model
year 2015 to model year
2016 and”
2
February 6, 2018
•
Under Symptom 2—Step
2.4 was added.
3
February 18, 2019
•
Under Symptom 2—Work
Procedure—The Notice
after Step 2, first sentence
was changed to The
following software update
via 'Programming Code'
may not be used on
vehicles before model year
2015.
4
May 29, 2021
•
Part numbers added
Vehicle Type:
Cayenne (VR6 - 92A)/Cayenne S (92A)/Cayenne GTS (92A)/Cayenne Turbo (92A)/Cayenne
Turbo S (92A)/Cayenne S Diesel (V8 - 92A)
Model Year:
As of 2011 up to 2017
Equipment:
With Hang-on transfer gear
Differentiation:
Information
Determine type of transmission or the software – Transmission has vanes without GNC coating or
with GNC coating:
Overview of required software versions in the control unit and the corresponding servo motor
part number.
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Symptom-based workshop manual
E2 I
vehicles
up to
model
year
2014:
E2 I up to
model
year
2014
Cayenne S
Diesel
Service
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3
Transmission
without GNC
(coating): up to
December 31,
2020
Transmission
without GNC
(coating): from
January 1, 2021
Transmission with
GNC (coating): up
to December 31,
2020
Transmission with
GNC (coating):
from January 1,
2021
Software version:
0947
Software version:
0948
Software version:
1150
Software version:
1151
Part No. of control
unit software (can
be read out using
the PIWIS Tester):
0C2927755K
Part No. of control
unit software (can
be read out using
the PIWIS Tester):
0C2927755AD
Part No. of control
unit software (can
be read out using
the PIWIS Tester):
0C2927755T
Part No. of control
unit software (can
be read out using
the PIWIS Tester):
0C2927755AB
Related Porsche
Part No. of control
unit hardware
(servo motor in the
PET):
958.618.755.09
Related Porsche
Part No. of control
unit hardware
(servo motor in the
PET):
958.618.755.D
Related Porsche
Part No. of control
unit hardware
(servo motor in the
PET):
958.927.755
Related Porsche
Part No. of control
unit hardware
(servo motor in the
PET):
958.927.755.B
Software version:
0947
Software version:
0948
Software version:
1150
Software version:
1151
Part No. of control
unit software (can
be read out using
the PIWIS Tester):
0C2927755K
Part No. of control
unit software (can
be read out using
the PIWIS Tester):
0C2927755AD
Part No. of control
unit software (can
be read out using
the PIWIS Tester):
0C2927755T
Part No. of control
unit software (can
be read out using
the PIWIS Tester):
0C2927755AB
Related Porsche
Part No. of control
unit hardware
(servo motor in the
PET):
958.618.755.09
Related Porsche
Part No. of control
unit hardware
(servo motor in the
PET):
7P5.927.769. B
Related Porsche
Part No. of control
unit hardware
(servo motor in the
PET):
958.927.755
Related Porsche
Part No. of control
unit hardware
(servo motor in the
PET):
7P5.927.769
PR number:
(PIWIS Tester:
Diagnostics 
Vehicle order •F7“
Additional menu
 Maintenance
of vehicle data
 Transfer gear
differentiation)
PR number:
(PIWIS Tester:
Diagnostics 
Vehicle order •F7“
Additional menu
 Maintenance
of vehicle data
 Transfer gear
differentiation)
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E2 II
vehicles
from
model
year
2015:
E2 II from
model
year
2015
Cayenne S
Diesel
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 The PR number
must be updated
manually to the
new version with
GNC plates if the
transfer gear is
replaced.
 The PR number
must be updated
manually to the
new version with
GNC plates if the
transfer gear is
replaced.
LU2 – Transfer
gear reinforced
LU2 – Transfer gear
reinforced
Software version:
1010
Software version:
1012
Software version:
1150
Software version:
1151
Part No. of control
unit software (can
be read out using
the PIWIS Tester):
0C2927755S
Part No. of control
unit software (can
be read out using
the PIWIS Tester):
0C2927755AE
Part No. of control
unit software (can
be read out using
the PIWIS Tester):
0C2927755AA
Part No. of control
unit software (can
be read out using
the PIWIS Tester):
0C2927755AC
Related Porsche
Part No. of control
unit hardware
(servo motor in the
PET):
958.618.755.12
Related Porsche
Part No. of control
unit hardware
(servo motor in the
PET):
958.618.755.E
Related Porsche
Part No. of control
unit hardware
(servo motor in the
PET):
958.927.755.A
Related Porsche
Part No. of control
unit hardware
(servo motor in the
PET):
958.927.755.C
Software version:
1010
Software version:
1012
Software version:
1150
Software version:
1151
Part No. of control
unit software (can
be read out using
the PIWIS Tester):
0C2927755S
Part No. of control
unit software (can
be read out using
the PIWIS Tester):
0C2927755AE
Part No. of control
unit software (can
be read out using
the PIWIS Tester):
0C2927755AA
Part No. of control
unit software (can
be read out using
the PIWIS Tester):
0C2927755AC
Related Porsche
Part No. of control
unit hardware
(servo motor in the
PET):
958.618.755.12
Related Porsche
Part No. of control
unit hardware
(servo motor in the
PET):
7P5.927.769.C
Related Porsche
Part No. of control
unit hardware
(servo motor in the
PET):
958.927.755.A
Related Porsche
Part No. of control
unit hardware
(servo motor in the
PET):
7P5.927.769.A
PR number:
(PIWIS Tester:
Diagnostics 
Vehicle order •F7“
Additional menu
PR number:
(PIWIS Tester:
Diagnostics 
Vehicle order •F7“
Additional menu
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Spare parts
requirements:
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 Maintenance
of vehicle data
 Transfer gear
differentiation)
 Maintenance
of vehicle data
 Transfer gear
differentiation)
 The PR number
must be updated
manually to the
new version with
GNC plates if the
transfer gear is
replaced.
 The PR number
must be updated
manually to the
new version with
GNC plates if the
transfer gear is
replaced.
LU2 – Transfer
gear reinforced
LU2 – Transfer gear
reinforced
Information
•
If the transfer case with servo motor (control unit) is replaced, there is no need to reload data
(classification data).
•
This data is already contained in the control unit for servo motor and transmission bundle
replacement.
•
Classification data can be read out of the control unit using the PIWIS Tester (see "Actual values" tab)
•
If only the servo motor is replaced, the classification data must be re-written into the control unit.
•
Classification data can be found on the transfer case housing.
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Symptom-based workshop manual
Only valid for model year 2011 - 2012:
Technical Information '391300 All-wheel drive control
unit needs to be replaced: Missing offset and gradient
values on the transfer gear (66/11)'
Information
The customer complaint about a clicking noise (from
the servo motor) can only occur on vehicles:
•
that were produced from model year 2015 to
model year 2016 and
•
with a software version lower than version 1010
in the all-wheel drive control unit.
Classification data for transfer case
Subject:
All-wheel drive servo motor (transfer gear)
Symptom
Clicking noises can come from around the transfer gear when driving slowly or when
manoeuvring in a yard or car park.
Cause:
Clicking noises can come from around the transfer gear when manoeuvring the vehicle (or driving slowly)
due to activation of the transfer gear servo motor.
Remedial
Action:
Before doing any other work, the symptom must be simulated using a test procedure:
(Opening the door windows can be helpful when evaluating noises).
1
Conditions for this test procedure:
•
•
•
2
Activate the Start/Stop function and
deactivate all sources of noise in the vehicle (Entertainment, ventilation, etc.).
A multi-storey car park can be useful for acoustic reverberation.
Procedure:
•
•
•
•
On a straight stretch
from speeds less than 20 km/h (10 mph)
brake the vehicle to a standstill.
The best way of finding the clicking noise is by driving slowly and then stopping the vehicle.
 In the event of a distinct customer complaint, the clicking noise can already be heard on a straight
stretch with partial load accelerations.
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 To correct the problem, re-program the all-wheel drive control unit, see 'Procedure' section
below (Link to Procedure module must still be added!).
The measure is complete after programming the all-wheel drive control unit.
Information
The procedure described here is based on the PIWIS Tester III software version 35.800.
The PIWIS Tester instructions take precedence and in the event of a discrepancy, these are the
instructions that must be followed.
A discrepancy may arise with later software versions for example.
Information
The description below contains the text 'With regard to 2'; 'Symptom 2', etc.
 However, 'With regard to 1'; 'Symptom 1', etc. is relevant only for model years 2015 and 2016.
 The description for '1' is not relevant for other model years.
With regard to
2:
Hang-on transfer gear  see "Symptom 2" below
Symptom 2:
Symptoms to be checked:
•
•
•
Rough-running engine or
the vehicle vibrates or
the engine jerks under load.
Information
Generally, the vehicle can start jerking when driving in tight corners with a small radius and when Off-road
mode is activated.
This behavior is perfectly normal for all-wheel drive vehicles and is not a defect on the vehicle.
NOTICE
Driving with connectors on chassis components or control units disconnected.
•
Bearings in transfer case can be damaged.

Drive vehicle only at a maximum speed of 30 mph (50 km/h).

Do not drive vehicle in the upper load range or at full throttle.

During Diagnosis of a vibration, a defective front axle shaft can cause a vibration and is masked when the
Transfer case is disconnected as torque is no longer applied to the front drive system in the same manner.
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Carry out the test procedure under the following conditions:
•
•
•
On a straight stretch
from speeds less than 20 km/h (10 mph)
accelerate the vehicle in the partial load range.
During this test procedure, if:
•
•
jerking can be felt, the test procedure under  (below) must also be carried out in order to
determine the exact cause.
no jerking is felt, see the information below about normal vehicle behavior:
Information
Generally, the vehicle can start jerking when driving in tight corners with a small radius and when Off-road
mode is activated.
This behavior is perfectly normal for all-wheel drive vehicles and is not a defect on the vehicle.
2
Depending on equipment:
•
•
with PTV PLUS (controlled rear-differential lock) – I-no. 1Y1 continue with  2.1
without front/rear differential lock – I-no. 1Y0  continue with 3.1
Information
Generally, the vehicle can start jerking when driving in tight corners with a small radius and when
Off-road mode is activated.
This behavior is perfectly normal for all-wheel drive vehicles and is not a defect on the vehicle.
2.1
Disconnect connector on the rear-differential lock control unit, see  Workshop Manual
'397519 Removing and installing control unit for rear-differential lock'.
2.2
Carry out the test procedure under the following conditions, see  :
 Disconnecting the connector should prevent the vehicle from jerking due to a higher
rear-differential lock locking value:
 If the problem occurs, continue with 2.3.
 If the problem no longer occurs, the rear final drive must be replaced, see 
Workshop Manual '398819 Removing and installing all-wheel final drive' and
Information
 For model year 2011 to 2013 vehicles, the steps described in the following campaign must
also be performed:
 Technical Information 'WC2600 WC26 Workshop campaign - Re-programming rear-differential lock
control unit'.
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Re-connect connector on the rear-differential lock control unit, see Workshop Manual
'397519 Removing and installing control unit for rear-differential lock'.
If jerking is felt during the test procedure under step ,the following test procedure must still
be carried out, see  3.1 to  3.3:
3.1
Disconnect connector on center differential lock (plug connection on transfer gear
servo motor).
Connector on rear-differential lock control unit must be inserted.
3.2
Carry out the test procedure under the following conditions:
•
•
•
On a straight stretch
from speeds less than 20 km/h (10 mph)
accelerate the vehicle in the partial load range.
 If the problem occurs, the transfer gear or rear final drive must be ruled out as
the cause.
 Avoid replacing these components.
 If the problem no longer occurs, the hang-on transfer gear must be replaced, see
 Workshop Manual '396519 Removing and installing transfer gear'.
3.3
Re-connect connector on center differential lock.
End of action required.
NOTICE
The following software update via 'Programming Code' may not be used on vehicles before model year 2015.
•
Malfunctions in the system

Use the software update via “programming code” only for model year 2015 to 2016 vehicles.
Tools:
•
•
9900 - PIWIS Tester 3 with PIWIS Tester software version 35.800 (or higher) installed
Battery charger with a current rating of at least 90 A, e.g. V A S 5 9 0 8 battery charger 90A
NOTICE
Fault entry in the fault memory and control unit programming aborted due to low voltage.
•
Increased current draw during diagnosis or control unit programming can cause a drop in voltage, which
can result in one or more fault entries and the abnormal termination of the programming process.

Before starting control unit programming, connect a battery charger or power supply, suitable for AGM
type batteries, recommended current rating of 90A fixed voltage 13.5V to 14.5V.
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NOTICE
Control unit programming will be aborted if the Internet connection is unstable.
•
An unstable Internet connection can interrupt communication between PIWIS Tester and the vehicle
communication module (VCI). As a result, control unit programming may be aborted.

During control unit programming, always connect PIWIS Tester to the vehicle communication module (VCI)
via the USB cable.
NOTICE
Control unit programming will be aborted if the vehicle key is not recognized
•
If the vehicle key is not recognized in vehicles with Porsche Entry & Drive, programming cannot be started
or will be interrupted.

Switch on the ignition using the original vehicle key. To do this, replace the original vehicle key in the
ignition lock with the plastic key fob if it was previously removed at the start of this procedure.
Work Procedure: 1
2
Preliminary work
Carry out general preliminary work for control unit programming as described in  Workshop
Manual '9X00IN Basic instructions and procedure for control unit programming using the PIWIS
Tester - section on "Preliminary work"'.
Re-program all-wheel drive control unit.
The basic procedure for programming a control unit is described in the Workshop Manual 
Workshop Manual '9X00IN Basic instructions and procedure for control unit programming using the
PIWIS Tester - section on "Programming"'
For specific information on control unit programming during this campaign, see table
below.
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Required PIWIS Tester software version:
35.800 (or higher)
Type of control unit programming:
Control unit programming using the "Campaign"
function in the Additional menu on the PIWIS
Tester by entering a programming code.
Programming code:
G5N7B
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Read and follow the information and instructions
on the PIWIS Tester during the guided
programming sequence.
Programming sequence:
The fault memory is first deleted during the
programming sequence. If the message appears
informing you that certain fault memory entries
could not be deleted, acknowledge the message by
pressing •>>“ and start control unit programming.
During programming, the all-wheel drive
control unit will be re-programmed and then
re-codedautomatically.
Do not interrupt programming and coding.
Once the control units have been programmed
and coded, the PIWIS Tester will prompt you to
switch the ignition off and then back on again after a
waiting time of approx. 10 seconds.
Programming time (approx):
2 minutes
Data record programmed during this
campaign (software part number):
0C2.927.xxx.S
Procedure in the event of error messages
appearing during the programming
sequence:
 Workshop Manual '9X00IN Basic instructions and
Procedure in the event of abnormal
termination of control unit programming:
Repeat control unit programming by restarting
programming.
Following control unit programming, the Porsche
part number can be read out of the 'All-wheel drive'
control unit in the  'Extended identification'
menu using the PIWIS Tester.
procedure for control unit programming using the
PIWIS Tester - section on "Fault finding"'.
If this is not possible, restart the PIWIS Tester and
then execute control unit programming again.
3
Subsequent work
3.1
Create a Vehicle Analysis Log (VAL) and mark it with the attribute "Following repairs". 
Workshop Manual '9X00IN Creating Vehicle Analysis Log (VAL)'
3.2
Carry out general subsequent work for control unit programming as described in 
Workshop Manual '9X00IN Basic instructions and procedure for control unit programming
using the PIWIS Tester - section on "Subsequent work"'.
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Invoicing:
Information
Labor operations for standard measures and standard repairs are not listed here.
These standard labor operations must be used in accordance with the Labor Operation List.
Only for model year 2015 to 2016 vehicles: The work involved is invoiced under the labor operation:
APOS
Labor operation
39952500
Programming all-wheel drive control unit
I No.
For invoicing and documentation using PQIS, enter the following coding, depending on the customer
complaint:
a) “Creaking noise” (clicking noise):
Location (FES5)
39780
Transfer gear servo motor
Damage type (SA4)
2015
creaking
b) "Rough-running engine, vehicle vibrates or engine jerks under load":
Location (FES5)
39650
Transfer gear
Damage type (SA4)
1313
vibrating, shaking
References:
 Workshop Manual '9X00IN Creating Vehicle Analysis Log (VAL)'
 Workshop Manual '9X00IN Basic instructions and procedure for control unit programming using the
PIWIS Tester - section on "Subsequent work"'
 Workshop Manual '397519 Removing and installing control unit for rear-differential lock'
 Workshop Manual '396519 Removing and installing transfer gear'
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.
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