Service Manual: 9X - ELECTRICAL SYSTEM - GENERAL -- 92A CAYENNE

WM 9X00IN BASIC INSTRUCTIONS AND PROCEDURE FOR CONTROL UNIT

PROGRAMMING USING THE PIWIS TESTER (CAYENNE, CAYENNE GTS & CAYENNE
TURBO S) > TOOLS

Designation Type Number Description

Battery Charger Workshop

WE 1353
HFL 65 Equipment

PIWIS Tester II Special Tool 9818

WM 9X00IN BASIC INSTRUCTIONS AND PROCEDURE FOR CONTROL UNIT

PROGRAMMING USING THE PIWIS TESTER (CAYENNE, CAYENNE GTS & CAYENNE
TURBO S) > BASIC INFORMATION AND INSTRUCTIONS FOR CONTROL UNIT
PROGRAMMING > BASIC INFORMATION ON CONTROL UNIT PROGRAMMING

Information

There are basically two different ways of carrying out control unit programming:

Using the "Programming" menu for the relevant control unit (e.g. for the DME and PDK control
units) .

or

Using the "Campaign" function in the Additional menu on the PIWIS Tester by entering a specific
programming code .

The type of control unit programming to be used is described in the relevant Technical Information.
WM 9X00IN BASIC INSTRUCTIONS AND PROCEDURE FOR CONTROL UNIT
PROGRAMMING USING THE PIWIS TESTER (CAYENNE, CAYENNE GTS & CAYENNE
TURBO S) > BASIC INFORMATION AND INSTRUCTIONS FOR CONTROL UNIT
PROGRAMMING > BASIC INSTRUCTIONS FOR CONTROL UNIT PROGRAMMING

NOTE: Fault entry in the fault memory and control unit programming aborted due to
undervoltage.

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 commencing work, connect a suitable battery charger with a current rating of at least 40 A to
the jump-start terminals in the engine compartment.

NOTE: Control unit programming will be aborted if the WLAN connection is unstable.

An unstable WLAN connection can interrupt communication between PIWIS Tester II

and the vehicle communication module (VCI). As a result, control unit programming may
be aborted.

→ During control unit programming, always connect PIWIS Tester II to the vehicle communication
module (VCI) via the USB cable.

NOTE: 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 control panel in the ignition
lock with the original vehicle key if necessary.

WM 9X00IN BASIC INSTRUCTIONS AND PROCEDURE FOR CONTROL UNIT

PROGRAMMING USING THE PIWIS TESTER (CAYENNE, CAYENNE GTS & CAYENNE
TURBO S) > GENERAL PRELIMINARY WORK

1. Disconnect electric plug connection for the fan blower -1- (-a- ) to prevent the fan blower from
coming on during control unit programming.

Having the fan on and the associated increased current draw can cause a drop in voltage,
which can result in abnormal termination of control unit programming.
 Fig 1: Identifying Electric Plug Connection Of Fan Blower

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

2. Connect a battery charger with a current rating of at least 40 A (e.g. Battery Charger HFL 65
WE 1353 ) to the jump-start terminals in the engine compartment and switch it on.

3. Switch on the ignition using the original driver's key . On vehicles with "Porsche Entry &
Drive", do this by replacing the control panel in the ignition lock with the original driver's key if
necessary.

4. PIWIS Tester II 9818 must be connected to the vehicle communication module (VCI) via the
USB cable . Then, connect the communication module to the vehicle and switch on the PIWIS
Tester.

WM 9X00IN BASIC INSTRUCTIONS AND PROCEDURE FOR CONTROL UNIT

PROGRAMMING USING THE PIWIS TESTER (CAYENNE, CAYENNE GTS & CAYENNE
TURBO S) > BASIC PROCEDURE FOR CONTROL UNIT PROGRAMMING USING THE
PIWIS TESTER > INFORMATION ON THE PROCEDURE FOR CONTROL UNIT
PROGRAMMING

Information

There are basically two different ways of carrying out control unit programming using the PIWIS Tester:
 Using the "Programming" menu for the relevant control unit (e.g. for the DME and PDK control
units) → Control unit programming using the "Programming" menu .

or

Using the "Campaign" function in the Additional menu on the PIWIS Tester by entering a specific
programming code → Control unit programming using the "Campaign" function in the Additional
menu on the PIWIS Tester .

The type of control unit programming to be used is described in the relevant Technical Information.

WM 9X00IN BASIC INSTRUCTIONS AND PROCEDURE FOR CONTROL UNIT

PROGRAMMING USING THE PIWIS TESTER (CAYENNE, CAYENNE GTS & CAYENNE
TURBO S) > BASIC PROCEDURE FOR CONTROL UNIT PROGRAMMING USING THE
PIWIS TESTER > CONTROL UNIT PROGRAMMING USING THE "PROGRAMMING"
MENU

1. On the PIWIS Tester start screen, call up the → 'Diagnostics' menu and select the relevant
vehicle type.

The diagnostic application is then started and the control unit selection screen is populated.

2. Select the control unit to be programmed in the control unit selection screen (→ "Overview"
menu) and press [>>] to confirm your selection → see Fig 1.
Fig 1: Identifying Control Unit Selection Screen Display

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

3. When the question "Create Vehicle Analysis Log (VAL)?" appears, either press [F12] to create
a VAL or press [F11] if you do not want to create a VAL.

4. Press [>>] to acknowledge the message that may appear informing you that campaigns for the
vehicle are stored in the PIWIS information system.

5. Once the control unit to be programmed has been found, select the → 'Programming' menu.

6. Select the → 'Automatic Programming' function and press [>>] to confirm your selection and
start the guided programming sequence → see Fig 2.
Fig 2: Identifying Automatic Programming Screen Display

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

7. Read and follow the Information And Instructions On The PIWIS Tester during the guided
programming sequence. Then press [>>] to continue.

During the programming sequence, the control unit is re-programmed and then re-coded
automatically if necessary.

Do Not Interrupt Programming And Coding .

Once control unit programming - and coding if necessary - is complete, you will be prompted to
switch the ignition off and then back on again after a specified waiting time.

Information

Once programming is completed successfully, the work described under → "General

subsequent work" must always be carried out.
 If other specific subsequent work is required, this is described in the relevant Workshop
Manual or in the relevant Technical Information.

Information

1. If an error message is displayed during programming (e.g. "Campaign does not exist",
"No suitable programming rules found" or "Vehicle data could not be read", etc.), please
read and follow the appropriate instructions provided under → Troubleshooting .

2. If programming is interrupted (e.g. due to a voltage drop or if communication is aborted,

etc.) or if programming could not be carried out successfully (error message
"Programming unsuccessful"), programming must be repeated .

3. If coding is not carried out successfully during the guided programming sequence, the
control unit must be re-coded again separately once the guided programming sequence
is complete. To do this, select the relevant control unit in the control unit selection screen
("Overview" menu) and press [>>] to confirm your selection. Once the control unit has
been found, select the "Codings/adaptations " menu and re-code the control unit using
the 'Automatic coding' function .

WM 9X00IN BASIC INSTRUCTIONS AND PROCEDURE FOR CONTROL UNIT

PROGRAMMING USING THE PIWIS TESTER (CAYENNE, CAYENNE GTS & CAYENNE
TURBO S) > BASIC PROCEDURE FOR CONTROL UNIT PROGRAMMING USING THE
PIWIS TESTER > CONTROL UNIT PROGRAMMING USING THE "CAMPAIGN"
FUNCTION IN THE ADDITIONAL MENU ON THE PIWIS TESTER

1. On the PIWIS Tester start screen, call up the → 'Diagnostics' menu and select the relevant
vehicle type.

The diagnostic application is then started and the control unit selection screen is populated.

2. In the control unit selection screen ("Overview" menu), press [F7] to call up the → 'Additional
menu' (→ see Fig 1).
 Fig 1: Identifying Control Unit Selection Screen Display

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

3. When the question "Create Vehicle Analysis Log (VAL)?" appears, either press [>>] to create a
VAL or press [F11] if you do not want to create a VAL.

4. Press [>>] to acknowledge the message that may appear informing you that campaigns for the
vehicle are stored in the PIWIS information system.

5. Select the → 'Campaign' function and press [>>] to confirm your selection → see Fig 2.

You are then prompted to enter a programming code.

 Fig 2: Identifying Additional Menu (Campaign)Screen Display

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

6. To enter the programming code, click in the relevant text box so that the cursor starts to flash
→ see Fig 3.
 Fig 3: Identifying Programming Code Input Field Screen Display

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

7. Enter the Programming Code specified in the relevant description (Technical Information,
Workshop Manual) and press [Enter] to confirm your entry.

The text box turns blue.

8. Press [>>] to start the guided programming sequence.

Read and follow the Information And Instructions On The PIWIS Tester during the guided
programming sequence. Then press [>>] to continue.

During the programming sequence, the control unit is re-programmed and then re-coded
automatically if necessary.

Do Not Interrupt Programming And Coding .

Once control unit programming - and coding if necessary - is complete, you will be prompted to
switch the ignition off and then back on again after a specified waiting time.

Information

Once programming is completed successfully, the work described under → "General

Subsequent Work" must always be carried out.

If other specific subsequent work is required, this is described in the relevant Workshop
Manual or in the relevant Technical Information.

Information
 1. If an error message is displayed during programming (e.g. "Campaign does not exist",
"No suitable programming rules found" or "Vehicle data could not be read", etc.), please
read and follow the appropriate instructions provided under → Troubleshooting .

2. If programming is interrupted (e.g. due to a voltage drop or if communication is aborted,

etc.) or if programming could not be carried out successfully (error message
"Programming unsuccessful"), programming must be repeated by entering the
programming code again (Additional menu > Campaign >> Enter campaign number). It
is not possible to program the control units manually .

3. If coding is not carried out successfully during the guided programming sequence, the
control unit must be re-coded again separately once the guided programming sequence
is complete. To do this, select the relevant control unit in the control unit selection screen
("Overview" menu) and press >> to confirm your selection. Once the control unit has
been found, select the "Codings/adaptations " menu and re-code the control unit using
the 'Automatic coding' function .

WM 9X00IN BASIC INSTRUCTIONS AND PROCEDURE FOR CONTROL UNIT

PROGRAMMING USING THE PIWIS TESTER (CAYENNE, CAYENNE GTS & CAYENNE
TURBO S) > GENERAL SUBSEQUENT WORK

1. Plug in electric plug connection for the fan blower.

2. Read out and erase all fault memories.

1. 2.1. In the control unit selection screen (→ 'Overview' menu), press [F7] to call up
the → 'Additional Menu' (→ see Fig 1).
Fig 1: Identifying Control Unit Selection Screen Display

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

 2. 2.2.

Select the function → 'Read All Fault Memories And Erase If Required' and press
[>>] to confirm → see Fig 2.

The fault memories of the control units are read out.

Fig 2: Identifying Erasing Fault Memories Screen Display

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

3. 2.3. Once you have read out the fault memories, delete the fault memory entries by
pressing [F8].

4. 2.4. Press [>>] ("Yes") in response to the question as to whether you really want to
delete all fault memory entries.

The faults stored in the fault memories of the various control units are deleted.

Information

If there are still fault memory entries in individual control units, start the engine briefly and then
switch it off again. Wait for approx. 10 seconds before switching the ignition on again and
re-establish the connection between the PIWIS Tester and the vehicle. Then read out and
erase the fault memories of the affected control units again separately.

If the control units are found to have other faults, which cannot be erased and are Not Caused
By Control Unit Programming , these faults must be found and corrected.

3. Switch off ignition.

4. Disconnect the PIWIS Tester from the vehicle.

 5. Switch off and disconnect the battery charger.

6. On vehicles with Porsche Entry & Drive, replace the original driver's key in the ignition lock with
the control panel again.

WM 9X00IN BASIC INSTRUCTIONS AND PROCEDURE FOR CONTROL UNIT

PROGRAMMING USING THE PIWIS TESTER (CAYENNE, CAYENNE GTS & CAYENNE
TURBO S) > TROUBLESHOOTING

Information

This section describes possible Causes And Remedial Action for Error Messages that can occur
both during control unit programming using the 'Campaign' function and during control unit
programming using the 'Automatic Programming' function.

Error message after starting

Possible causes Remedial action
programming

Update PIWIS Tester software to

the software version specified in
PIWIS Tester software the Technical Information (or a
is not up-to-date higher software version). Then
enter the programming code again
and start programming.

Close the diagnostic application.

Specified campaign does not
Select the correct vehicle type and
exist Wrong vehicle type
restart the diagnostic application.
selected
Then enter the programming code
again and start programming.

Incorrect programming
Enter the programming code
code entered or
specified in the Technical
programming code not
Information correctly.
entered correctly

Campaign must not be

carried out on the Check vehicle assignment to the
vehicle or campaign campaign in PIWIS > Vehicle
was already carried Information .
No suitable programming rules
out.
found. Cause: Part Number Of
The Control Unit is not in the
programming rules.
Replacement control Check Porsche part number of the
unit with up-to-date relevant control unit in the →
software version was "Extended identification" menu.
installed
Information about the current Porsche
 Software version of the
installed control unit is
already up-to-date
part numbers and software versions of
the affected control unit can be found in
Software version of the the relevant Workshop Manual or in the
control unit is a version relevant Technical Information.
that is not intended for
carrying out the
campaign.

Campaign must not be Check vehicle assignment to the

carried out on the campaign in PIWIS > 'Vehicle
vehicle. Information' menu.
No suitable programming rules
found. Cause: Current Vehicle
Equipment is not shown in the
Check vehicle order and correct it
programming rules. Please
if necessary (PIWIS Tester >
check vehicle order and change
Additional menu >> Maintenance
it if necessary. Vehicle order is wrong.
of vehicle data). Then enter the
programming code again and start
programming.

Switch on ignition and close and

Ignition not switched restart the diagnostic application.
Vehicle data could not be read
on Then enter the programming code
again and start programming.

WM 9X00IN MEASUREMENT OF CLOSED-CIRCUIT CURRENT (CAYENNE, CAYENNE

TURBO, CAYENNE GTS & CAYENNE TURBO S) > TOOLS

Closed-circuit current should be measured using the digital multimeter with a long integration time (to
filter out voltage peaks).
Fig 1: Identifying Digital Multimeter

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

WM 9X00IN MEASUREMENT OF CLOSED-CIRCUIT CURRENT (CAYENNE, CAYENNE

TURBO, CAYENNE GTS & CAYENNE TURBO S) > PREPARATORY WORK ON THE
VEHICLE

Information

Before measuring the closed-circuit current, determine the vehicle equipment (I-numbers) and
establish the expected closed-circuit current with the aid of the attached table.

The closed-circuit current must only be measured on a cold vehicle (engine & brakes).

1. Close all doors and lids on the vehicle.

2. Read out the fault memory and delete the displayed faults if necessary.

3. Disconnect the battery.

WM 9X00IN MEASUREMENT OF CLOSED-CIRCUIT CURRENT (CAYENNE, CAYENNE

TURBO, CAYENNE GTS & CAYENNE TURBO S) > CONNECTING THE MEASURING
DEVICE

1. Use alligator clips to connect the measuring device to the battery ground and body ground.

2. Remove ground strap from the body and secure against contact with the body. The entire
vehicle current now flows through the ammeter.

WM 9X00IN MEASUREMENT OF CLOSED-CIRCUIT CURRENT (CAYENNE, CAYENNE

TURBO, CAYENNE GTS & CAYENNE TURBO S) > MEASUREMENT

Read off the measured values after the waiting period specified in the table.

1. Switch on ignition for 10 seconds.

2. Switch off ignition.

3. Open the driver's door and close the rotary latch with a screwdriver while the door is open.

4. Lock the vehicle using the central-locking remote control and switch off passenger
compartment monitoring (press the button on the remote control twice in one second).

5. Wait 35 minutes before reading off the closed-circuit current.

Information

1. If the value of the closed-circuit current is higher than the value determined in the table,
the cause must be established systematically.

2. Recommended troubleshooting procedure: With the measuring device connected,

remove the fuses of terminal 30 and the relays successively. Observe the values
displayed on the measuring device when removing the fuses and relays in order to detect
a reduction in current.

3. The measured values can vary by approx. 20%.

4. The values listed in the table depend on the condition of the battery, the room
temperature, the engine temperature and therefore should only be regarded as
guidelines.

Reading Off The Measuring Range:

Read off the measuring range only after at least 35 minutes have passed since locking the
vehicle.

From to mA

35 min. Until battery is empty max. 30

Control unit Equipment Closed-circuit current in mA

Trailer 0.4

Alarm horn 0.86

Battery sensor Standard 0.25

Front BCM, front-end electronics Standard 3.05

Rear BCM, rear-end electronics Standard 7.63

Telephone handset 0

CDR 31 0.125

Roof console Standard 2.78

DME Standard 0

Steering column adjustment 0.05

ELV, electronic steering column lock Standard 0.035

Gateway Standard 0.335

Generator Standard 0.215

Main fuse box Standard 0.04

Front A/C control panel Standard 0.07

Rear A/C control panel 0.07

Instrument cluster Standard 0.19

Fuel pump control unit Standard 0.22

Steering column module Standard 0.03

Light switch Standard 0

Engine fan Standard 0.01

PASM 0.07

Parking brake Standard 0.03

PCM 0.15

PDCC 0.005

PDK 0.06

Powerlift tailgate 0.08

PSM Standard 0.03

Transverse lock 0.115

TPM (Tyre Pressure Monitoring) 0.02

Rain sensor 0.015

Sunroof 0.045

Seat, FL 0.16

Seat, FR 0.16

Auxiliary heater 0.03

Stopwatch 0.03
 Auxiliary heater telestart 1.53

Door, RL 0.09

Door, RR 0.085

Door, FL 0.12

Door, FR 0.11

Amplifier 0.01

Burmester amplifier 0.015

Wiper Standard 0.01

Ignition lock Standard 0.07

Start-Stop Standard 0.01

Maximum Closed-Circuit Current 30 mA

Calculated closed-circuit current 19.45 mA

6. Connect battery and read out fault memory. Erase any faults if necessary. → Connecting The
Battery .

WM 9X00IN MEASUREMENT OF CLOSED-CIRCUIT CURRENT (CAYENNE, CAYENNE

TURBO, CAYENNE GTS & CAYENNE TURBO S) > TOOLS

Closed-circuit current should be measured using the digital multimeter with a long integration time (to
filter out voltage peaks).
Fig 1: Identifying Digital Multimeter

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

WM 9X00IN MEASUREMENT OF CLOSED-CIRCUIT CURRENT (CAYENNE, CAYENNE

TURBO, CAYENNE GTS & CAYENNE TURBO S) > PREPARATORY WORK ON THE
VEHICLE

Information

Before measuring the closed-circuit current, determine the vehicle equipment (I-numbers) and
establish the expected closed-circuit current with the aid of the attached table.

The closed-circuit current must only be measured on a cold vehicle (engine & brakes).

1. Close all doors and lids on the vehicle.

2. Read out the fault memory and delete the displayed faults if necessary.

3. Disconnect the battery.

WM 9X00IN MEASUREMENT OF CLOSED-CIRCUIT CURRENT (CAYENNE, CAYENNE

TURBO, CAYENNE GTS & CAYENNE TURBO S) > CONNECTING THE MEASURING
DEVICE

1. Use alligator clips to connect the measuring device to the battery ground and body ground.

2. Remove ground strap from the body and secure against contact with the body. The entire
vehicle current now flows through the ammeter.

WM 9X00IN MEASUREMENT OF CLOSED-CIRCUIT CURRENT (CAYENNE, CAYENNE

TURBO, CAYENNE GTS & CAYENNE TURBO S) > MEASUREMENT

Read off the measured values after the waiting period specified in the table.

1. Switch on ignition for 10 seconds.

2. Switch off ignition.

3. Open the driver's door and close the rotary latch with a screwdriver while the door is open.

4. Lock the vehicle using the central-locking remote control and switch off passenger
compartment monitoring (press the button on the remote control twice in one second).

5. Wait 35 minutes before reading off the closed-circuit current.

Information

1. If the value of the closed-circuit current is higher than the value determined in the table,
the cause must be established systematically.

2. Recommended troubleshooting procedure: With the measuring device connected,

remove the fuses of terminal 30 and the relays successively. Observe the values
displayed on the measuring device when removing the fuses and relays in order to detect
a reduction in current.

3. The measured values can vary by approx. 20%.

4. The values listed in the table depend on the condition of the battery, the room
temperature, the engine temperature and therefore should only be regarded as
guidelines.

Reading Off The Measuring Range:

Read off the measuring range only after at least 35 minutes have passed since locking the
vehicle.

From to mA

35 min. Until battery is empty max. 30

Control unit Equipment Closed-circuit current in mA

Trailer 0.4

Alarm horn 0.86

Battery sensor Standard 0.25

Front BCM, front-end electronics Standard 3.05

Rear BCM, rear-end electronics Standard 7.63

Telephone handset 0

CDR 31 0.125

Roof console Standard 2.78

DME Standard 0

Steering column adjustment 0.05

ELV, electronic steering column lock Standard 0.035

Gateway Standard 0.335

Generator Standard 0.215

Main fuse box Standard 0.04

Front A/C control panel Standard 0.07

Rear A/C control panel 0.07

Instrument cluster Standard 0.19

Fuel pump control unit Standard 0.22

Steering column module Standard 0.03

Light switch Standard 0

Engine fan Standard 0.01

PASM 0.07

Parking brake Standard 0.03

PCM 0.15

PDCC 0.005

PDK 0.06

Powerlift tailgate 0.08

PSM Standard 0.03

Transverse lock 0.115

TPM (Tyre Pressure Monitoring) 0.02

Rain sensor 0.015

Sunroof 0.045

Seat, FL 0.16

Seat, FR 0.16

Auxiliary heater 0.03

Stopwatch 0.03
 Auxiliary heater telestart 1.53

Door, RL 0.09

Door, RR 0.085

Door, FL 0.12

Door, FR 0.11

Amplifier 0.01

Burmester amplifier 0.015

Wiper Standard 0.01

Ignition lock Standard 0.07

Start-Stop Standard 0.01

Maximum closed-circuit current 30 mA

Calculated closed-circuit current 19.45 mA

6. Connect battery and read out fault memory. Erase any faults if necessary. → Connecting The
Battery