Tiptronic -- Diagnostics: Other Porsche Cayenne I

Tiptronic (automatic transmission)

Diagnosis software number: G 0210

Cayenne model year 2003

General instructions/safety instructions

Communication between Tiptronic control module and Porsche System Tester II No. 9588

Note. The following conditions must be met in order to establish communication between the Tiptronic control module and the Porsche System Tester II No. 9588

1. Porsche System Tester II No. 9588 connected to data link connector
2. The battery voltage must be greater than 6.5 V

Fault code setting conditions

Fault codes can be set in various circumstances, e.g.

1. battery disconnected
2. plug connections disconnected
3. faulty coding
4. power failure
5. etc. In these circumstances, no fault is present in the system and the fault memory must be erased.

Standard fault codes in accordance with ISO 15031

Diagnostic fault codes, which can be issued by the control module, are standardized in accordance with ISO 15031. This ISO standard is based on SAE J 2012.

The fault code (DTC = Diagnostic Trouble Code) is always a 5-character alphanumeric value, e.g. "P0100".

The first character of the code (a letter) identifies the system that set the code. In all, there are 4 system types

1. P for Powertrain (all OBD2 fault codes begin with this)
2. C for Chassis
3. B for Body
4. U for future systems.

The P codes for powertrain are divided into two main categories in accordance with ISO 15031

1. Uniformly standardized codes: P0XXX and P2XXX; these are the same for all manufacturers
2. Manufacturer codes: P1XXX and P3XXX; only the first three characters are standardized here (example: P13XX for ignition system diagnosis or misfire detection), the last two digits can be selected freely by the manufacturer. Only the P codes are required for OBD II. The standardized codes are subdivided as follows: P CODES REFERENCE P001 to P0299 Fuel and air proportioning P03xx Ignition system and misfire detection P04xx Additional exhaust regulations P05xx Speed and idle speed control P06xx Computer and output signals P0700 to P0999 Transmission P2000 to P2299 Fuel and air proportioning P23XX Ignition system and misfire detection P24XX Additional exhaust regulations P25XX Additional input signals P26XX Computer and output signals P27XX Transmission P28XX Reserved P29XX Fuel and air proportioning

Possible causes of fault

Note. The 'possible causes of fault' that are responsible for the fault are listed here. Please note that in certain circumstances further faults can be stored in the fault memory after troubleshooting (e.g. if plugs are disconnected). After carrying out repairs, read out the fault memory of all control modules and erase any faults.

Fault type

The following fault types are possible

1. no display
2. upper limit value exceeded
3. lower limit value not reached
4. mechanical fault
5. no signal/communication
6. no or incorrect basic setting/adaptation
7. short circuit to B+
8. short circuit to ground
9. implausible signal
10. open circuit/short circuit to ground
11. open circuit/short circuit to B+
12. open circuit
13. electrical fault in electric circuit
14. please read out fault memory
15. faulty
16. cannot be checked now

Fault status

The following status types are possible

1. present
2. not present This information should be saved using the Save key [F8] and printed out. NOTE: Visual inspection: During troubleshooting, please check first that the affected pins on the control module plug connection are neither damaged nor corroded. The wires and plugs of the affected components must also be checked for external damage and correct contacts. Repair damaged or corroded pins if possible, otherwise replace affected pins. Repair or replace damaged wires. NOTE: Battery voltage: A battery voltage of between 11.4 and 14.5 V is required for troubleshooting. This must be checked and provided if necessary. Voltages as well as components or fuses (input side) must be guaranteed on the vehicle electrical system.

Freeze frame (frozen fault boundary conditions)

Freeze frame data is standardized and records operating conditions in the event of a fault. Freeze frames have different priorities, which can be important when output to a Scan Tool. These can be viewed in the "extended fault memory" of the Porsche System Tester II No. 9588.

Furthermore, various operating conditions can be stored for each fault. These can provide reference points for determining the cause of a fault in the case of difficult diagnoses. These can be viewed in the "extended fault memory" of the Porsche System Tester II No. 9588.

Fault deletion counter

An individual deletion counter runs for every fault detected. It determines the storage duration of the related fault.

When a fault is first detected, the deletion counter is set to 80, for example (suspected fault).

If a non-persistent fault is detected as having been remedied, the deletion counter is set to 10, for example (fault did not occur often enough to be confirmed).

Whenever a persistent fault is detected, the deletion counter is set to 40, for example. This value is retained until the fault is detected as having been remedied.

The deletion counter is decremented by 1 after every warm-up cycle if the fault in question is a non-persistent fault or is detected as having been remedied (faults that are confirmed, but are not detected as having been remedied are not decremented in the deletion counter). If the deletion counter reaches the value 0, the fault is deleted from the memory.

Fault frequency counter

This counter shows how often a fault has recurred following its first occurrence. If the frequency value is 1, the fault has only occurred once. It can now be either "present" or "not present". The fault frequency counter is incremented whenever this fault recurs (the fault correction counter was decremented in the meantime, i.e. a check was performed and found to be OK). A higher value in the fault frequency counter can therefore indicate a loose contact.

Tiptronic tools

Note. Before starting the diagnosis a suitable charging device must be connected to maintain battery capacity. Plug contacts are optimally designed to suit the plug system. Operations on pins can cause contact problems. Always use suitable measurement tools for adapter plugs and test cables.

Scheme 13

Scheme 14

Scheme 15

Scheme 16

Scheme 17

1. CAN drive (CAN-C) Rate-of-turn sensor (wheel) front left front right rear left rear right PSM control module Located in right radiator tank with hydraulic unit screwed on, under DME control module DME control module Located in right radiator tank, above hydraulic unit with PSM control module Fuse carrier at right of dashboard Integrated into right side of dashboard Tiptronic control module Located on vehicle floor under passenger's seat (front right) Transfer box control module Located on vehicle floor under passenger's seat (front right) Steering wheel with Tiptronic rocker switch Steering column switch with electronic unit and steering-angle sensor On the steering column under the steering wheel Instrument cluster (includes the gateway) Integrated into dashboard Vehicle electrical system control module (connected to CAN comfort) Located on right side of steering column near KESSY control module Pressure sensor (brake) Located on the underside of the brake master cylinder. Brake master cylinder and active brake booster are integrated into radiator tank. Tiptronic transmission (automatic transmission) Multi-function switch 'PRND' 'screwed to right side of housing' Torque converter Converter jumper clutch 'integrated into torque converter' Hydraulic control unit Sensors Solenoid valves Selector lever module (in center console)

Component arrangement 'Item 12' Tiptronic transmission (automatic transmission)

Scheme 18

A - Multi-function switch plug connection 'PRND', (existing transmission wiring)

B - Sensor plug connection (existing transmission wiring)

C - Solenoid valve plug connection (existing transmission wiring)

1 - Multi-function switch 'PRND'

Scheme 19

Scheme 20

Scheme 21

TIPTRONIC CONTROL MODULE PLUG 52-PIN REFERENCE

Plug 'A', selector lever switch, '6-pin'

Scheme 22

Corresponding socket 'A', selector lever switch, '6-pin'

Scheme 23

SELECTOR LEVER SWITCH PIN REFERENCE

Socket for solenoids (transmission side) 'A', '14-pin' and sensors (transmission side) 'B', '8-pin'

Scheme 24

Connector 'A'

CONNECTOR A PIN REFERENCE

Connector 'B'

CONNECTOR B PIN REFERENCE

Plug 'C', multi-function switch, '10-pin' (existing transmission wiring)

Scheme 25

Corresponding socket 'C', multi-function switch, '10-pin' (existing transmission wiring)

Scheme 26

CORRESPONDING SOCKET C PINS REFERENCE

Control unit function (coding/programming)

Transmission, diagnosis software number: G 0210

1. Cayenne S (A 48.00)
2. Cayenne Turbo (A 48.50)

Integrated functions

The Tiptronic control unit is designed for the OBD II/EOBD and includes the functions listed below

1. Computer identification
2. Computer configuration (internal function test) with ignition ON
3. Checking the fault memory for fault entries, even in diagnostic mode
4. Erasing the fault memory
5. Reading measured values from switches and sensors

Supported functions

1. Diagnosis software number
2. Drive link test with active fault checking

Basic setting

1. Adaptation/Resetting adaptation values
2. Read memory
3. Write memory
4. Update program
5. Flash program
6. Protected against unauthorized access

Commissioning

When the ignition 'terminal 15' is switched on, an internal function test (initialization phase/configuration) is performed in the Tiptronic control unit. When the internal function test is completed successfully, all functions integrated into the Tiptronic control unit are enabled.

Operating condition

The Tiptronic control unit is in operating mode once the ignition is switched on and the internal function test is completed successfully. Within the defined limits for power supply '10.5 V to 16.5 V' and temperature, all incoming signals are processed by the integrated software and the appropriate monitoring and control processes are performed.

The solenoid valves in the transmission are guaranteed to function perfectly at a voltage of between '9.0 V and 16.5 V'.

Data transfer

The Tiptronic control unit sends and receives data/information via the following 'CAN data bus'

1. CAN drive (C)
2. Gateway (in instrument cluster)

Data transfer via the CAN drive is guaranteed at a voltage of between '6.5 V and 16.5 V'.

Wake-up function via CAN data bus 'CAN drive'

1. The data bus switches to idle state after ignition is OFF for 8 seconds

Fault memory

Faults that occur during operation are stored in a non-volatile memory (e.g. EEPROM). The faults remain in the memory even if terminal 15 and terminal 30 are not live. The fault memory is designed in such a way that the occurring faults, data source, fault type and fault deletion counter can be saved. The Tiptronic control unit sends messages and checks the CAN drive cyclically for messages from other control units. If no messages are received for a certain time period, a fault is stored in the fault memory.

Adaptation

Note. Undeleted adaptation values result in rough shift operations in the transmission. The Tiptronic control unit needs a certain amount of time to replace existing values with new values.

Work to be carried out after replacing a control unit

1. Delete the adaptation values using the Porsche System Tester II No. 9588
2. Teach the accelerator pedal

To teach the accelerator pedal

1. Ignition ON
2. Press the accelerator pedal for at least 3 seconds

The accelerator pedal can also be taught while the vehicle is in motion, provided the accelerator pedal is pressed for at least 3 seconds. No indication is given that the teaching procedure is complete.

Coding

Note. If the coding does not agree with the vehicle equipment, faults will be displayed that do not really exist.

Coding/Programming

Under the menu item "Extract coding" you can read out which equipment features are activated and which are not.

After successful replacement of the 'Tiptronic control unit', the coding in the DME control unit must be adapted.

Modifying coding

1. Asia
2. U.S.A.
3. RoW (rest of world)

Limp-home mode

The functions stored for the limp-home mode in the Tiptronic control unit are divided into two categories: Limp-home mode 1 and limp-home mode 2.

The following table shows the shift response of the transmission in limp-home mode

Limp-home mode 1

Fault not caused by incorrect gear ratio or unusual shifting!

Explanation of table headings and content

1. Shift state before setting fault: States the selected position of the selector lever and the selected gear before the fault occurs and is set.
2. Step 1: After a fault occurs and is set, the Tiptronic control unit switches to limp-home mode and initiates the appropriate shift operation.
3. Step 2: The vehicle is in motion and the shift operation initiated in 'Step 1' terminates.
4. Step 3: Motion is interrupted and the vehicle stops. The Tiptronic control unit initiates the shift operation for 'gear 3' (the run will be continued in 'gear 3').
5. Step 4: The shift operation initiated in 'Step 3' terminates and 'gear 3' is engaged.

SHIFT RESPONSE OF TRANSMISSION IN LIMP-HOME MODE 1

Explanatory notes on content of table for Limp-home mode 1

Power switch (in Tiptronic control unit)

With the power switch (in Tiptronic control unit) 'ON', the Tiptronic control unit can control the transmission.

With the power switch (in Tiptronic control unit) 'OFF', the Tiptronic control unit cannot control the transmission.

1. D: 'Selector lever position' gears 1, 2, 3, 4, 5, 6
2. R: 'Selector lever position' reverse gear
3. 'B1' Shift solenoid valve B1 (modulation pressure)

Where the state given in the table is shown with a '*' or '**', then the state is modified as follows

1. *: 'Gear 5' is engaged if a fault is present in the 'shift solenoid valve C1 (modulation pressure)' (disengagement fault of the torque converter lockup clutch).
2. **: Shifting is not possible if a fault is present in the 'shift solenoid valve C2 (modulation pressure)' (engagement fault of the torque converter lockup clutch). If the selector lever is moved from 'D' to 'N' and back again to 'D', then the Tiptronic control unit shifts to 'gear 5'. Differences: If the vehicle speed = 0 km/h and the period of 10 seconds set in the selector lever positions 'P, R, N' expires, then 'gear 3' is engaged after changing the selector lever position from 'D' to 'N' and back again to 'D'. If the selector lever is moved from 'D' to 'N' and back again to 'D' in 'step 1' and 'step 2', the Tiptronic control unit shifts to 'gear 5'.

In the event of a 'solenoid valve modulation pressure (main)' fault, the torque is limited as follows

1. Selector lever in position 'D' 150 Nm
2. Selector lever in position 'R' 100 Nm

Limp-home mode 2

Fault caused by incorrect gear ratio or unusual shifting!

Explanation of table headings and content

1. Shift state before setting fault: States the selected position of the selector lever and the selected gear before the fault occurs and is set.
2. Step 1: Vehicle in motion. After a fault occurs and is set, the Tiptronic control unit switches to limp-home mode. The gear engaged before the fault was set remains and the torque converter lockup clutch is not activated.
3. Step 2: Motion interrupted, the vehicles is stationary, the gear engaged in 'step 1' is held. Shift solenoid valve C2 (modulation pressure) and shift solenoid valve B1 (modulation pressure) are 'ON'. All other shift solenoid valves are 'OFF'. Shift operation for 'gear 3' is prepared.
4. Step 3: Shift operation for 'gear 3' terminates and the gear is held. Neutral-detect is started.
5. Step 4: Shift operation for 'gear 5' is initiated. No 'neutral' state.
6. Step 5 Shift operation for 'gear 5' terminates. No 'neutral' state and the shift solenoid valves are disabled.

SHIFT RESPONSE OF TRANSMISSION IN LIMP-HOME MODE 2

Power switch (in Tiptronic control unit)

With the power switch (in Tiptronic control unit) 'ON', the Tiptronic control unit can control the transmission.

With the power switch (in Tiptronic control unit) 'OFF', the Tiptronic control unit cannot control the transmission.

Possible cause of fault

1. Incorrect vehicle type selected in 9588 Porsche System Tester II
2. 9588 Porsche System Tester II is not connected correctly or is faulty
3. Power supply to the 'Tiptronic control unit' is not OK
4. 'K-line' to 'Tiptronic control unit' faulty
5. 'CAN drive' does not function
6. 'Tiptronic control unit' does not function

Affected pins

Tiptronic control module plug

1. Pin 27 'terminal 15 power supply via fuse F51/fuse carrier at right of dashboard'
2. Pin 28 'terminal 15 power supply via fuse F51/fuse carrier at right of dashboard'
3. Pin 3 'terminal 30 power supply via fuse F29/fuse carrier at right of dashboard'
4. Pin 1 'ground from body ground pin MB26'
5. Pin 2 'ground from body ground pin MB26'
6. Pin 46 'CAN drive (high)'
7. Pin 34 'CAN drive (low)'

Diagnostic box in driver's footwell

Scheme 27

CONNECTOR PINS REFERENCE

Shift solenoid valve (S1) [Shift Solenoid 'A' Electrical]

Note. The ignition must be switched off and then switched on again in order to display an error message in the instrument cluster.

System in limp-home mode 1: Fault not caused by incorrect gear ratio or unusual switching!

Note. Please refer to ' LIMP-HOME MODE 1 ' table in the main chapter entitled 'Control module function (coding/programming)'!

Use the 'Actual values' menu in the Porsche System Tester II No. 9588 to check the transmission status and the actual values of the shift solenoid valves and sensors.

The following requirements are met for at least 0.5 seconds

1. Ignition on, voltage greater than 10.2 V and less than 15.5 V
2. Internal Tiptronic control module function test was completed successfully
3. Engine runs without malfunctions

Note. The 'Diagnosis/troubleshooting' shown below is adapted to suit the fault type displayed in the tester (please note fault type numbering 1, 2,... etc.!). The fault memory Info key [F8] on the Porsche System Tester II No. 9588 can be used to read out the fault type in the 'extended fault memory'. 1.) 'Open circuit/short circuit to B+': A short circuit to B+ causes the shift solenoid valve (S1) to be continually activated 1.) 'Open circuit/short circuit to B+': An open circuit prevents activation of the shift solenoid valve (S1) 2.) 'Short circuit to ground': A short circuit to ground prevents activation of the shift solenoid valve (S1)

Tiptronic control module plug

1. Pin 41 'voltage of shift solenoid valve (S1)', to existing transmission wiring plug 'pin A1'

Scheme 28

1 - Tiptronic control module

2 - Shift solenoid valve (S1)

41 - Pin (41)

I - Current flow

Data on shift solenoid valve (S1)

1. Max. voltage drop on Tiptronic control module: 1.5 V
2. Operating voltage (during switching): 10.5 V to 16.5 V
3. Max. voltage drop in wiring: 0.08 V
4. Max. power consumption: 1.9 A
5. Default internal resistance: 13 ± 2 ohms (at 20°C)

Note. Visual inspection: In the next troubleshooting section, please check first that the affected 'pins' on the Tiptronic control module plug connection and the 'pins' on the 'existing transmission wiring' plug connection are neither damaged nor corroded. Remove any soiling or corrosion/oxidation. Replace damaged parts/wires.

Note. Replacing control module: Before replacing the 'Tiptronic control module', the ground connections, power supply and plug connections on the control module must be checked. Please observe the coding of the control module. After the test drive, read out the fault memory again with the Porsche System Tester II No. 9588. Additional causes of faults that could damage the 'Tiptronic control module' should be detected and remedied.

1. Troubleshooting only for fault type: 'Open circuit/short circuit to B+' TROUBLESHOOTING PROCEDURE ONLY OPEN CIRCUIT/SHORT CIRCUIT TO B+ Work instruction Display OK If not OK 1 Check for short circuit to B+ with 'Tiptronic control module' plug disconnected and solenoid valve plug connected (existing transmission wiring): Switch off ignition Pull plug off Tiptronic control module Switch on ignition Measure voltage between 'pin 41' and ground on Tiptronic control module plug. < 0.3 V Go to Step 2 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 2 Check for short circuit with both 'Tiptronic control module' plug and solenoid valve plug disconnected (existing transmission wiring): Switch off ignition Measure resistance between 'pin Al' and pins 'A2, A3, A5, A7, A9, A11, A13' on solenoid valve plug (existing transmission wiring). infinity ohms Go to Step 3 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 3 Check for open circuit with 'Tiptronic control module' plug disconnected and solenoid valve plug connected (existing transmission wiring): Switch off ignition Measure resistance between 'pin 41' and ground on Tiptronic control module plug. 13 ± 2 ohms (at 20°C) Go to Step 7 Go to Step 4 4 Check for open circuit with both 'Tiptronic control module' plug and solenoid valve plug disconnected (existing transmission wiring): Switch off ignition Pull off solenoid valve plug (existing transmission wiring) Measure resistance between 'pin 41' on Tiptronic control module plug and 'pin A1' of solenoid valve plug (existing transmission wiring). < 2 ohms Go to Step 5 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 5 Check wire in the transmission for open circuit: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid) Remove ATF filter, perform visual inspection of plug and wiring: Switch off ignition Solenoid valve plug (existing transmission wiring) connected Measure resistance between 'pin 41' on Tiptronic control module plug and shift solenoid valve (S1) plug. < 2 ohms Go to Step 6 Replace wiring harness in the transmission. --> End 6 Check shift solenoid valve for open circuit: Measure resistance between shift solenoid valve (S1) plug and housing. 13 ± 2 ohms (at 20°C) Go to Step 8 Winding interrupted! Go to Step 9 7 Check mechanical functionality of shift solenoid valve (S1) using Tiptronic control module plug: Tiptronic control module plug disconnected and solenoid valve plug (existing transmission wiring) connected Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to 'pin 41' of the Tiptronic control module plug for a short time. A distinct clicking sound should be heard immediately from the shift solenoid valve. Go to Step 10 Go to Step 8 8 Check the mechanical functionality of the shift solenoid valve (S1) directly at the valve: Pull plug off the shift solenoid valve (S1). Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to the shift solenoid valve for a short time. A distinct click should be heard from the shift solenoid valve. Go to Step 10 Shift solenoid valve stiff. Go to Step 9 9 Replace shift solenoid valve (S1) Only replace if the wiring in the transmission was checked for chafing damage and found to be OK. --> End 10 Replace control module See note on replacing control modules! --> End
2. Troubleshooting only for fault type: 'Short circuit to ground' TROUBLESHOOTING PROCEDURE SHORT CIRCUIT TO GROUND Work instruction Display OK If not OK 1 Check for short circuit to ground with 'Tiptronic control module' plug disconnected and solenoid valve plug connected (existing transmission wiring): Switch off ignition Pull plug off Tiptronic control module Measure resistance between 'pin 41' and ground on Tiptronic control module plug. 13 ± 2 ohms (at 20°C) Go to Step 6 Go to Step 2 2 Check for short circuit to ground with both 'Tiptronic control module' plug and solenoid valve plug disconnected (existing transmission wiring): Pull off solenoid valve plug (existing transmission wiring) Measure resistance between 'pin 41' and ground on Tiptronic control module plug. infinity ohms Go to Step 3 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 3 Check for short circuit with both 'Tiptronic control module' plug and solenoid valve plug disconnected (existing transmission wiring): Measure resistance between 'pin Al' and pins 'A4, A6, A8, A10, A12, A14' on solenoid valve plug (existing transmission wiring). infinity ohms, Go to Step 4 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 4 Check wire in the transmission for short circuit to ground: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid) Remove ATF filter, perform visual inspection of plug and wiring: Pull plug off the shift solenoid valve (S1). Measure resistance between disconnected plug (wiring side) and ground (transmission housing). infinity ohms Go to Step 5 Replace wiring harness in the transmission. --> End 5 Check directly at the valve for short circuit to ground in the shift solenoid valve (S1): Pull plug off the shift solenoid valve (S1). Measure resistance between plug on disconnected shift solenoid valve (S1) and ground (transmission housing). 13 ± 2 ohms (at 20°C) Go to Step 7 Shift solenoid valve stiff. Go to Step 8 6 Check mechanical functionality of shift solenoid valve (S1) using Tiptronic control module plug: Tiptronic control module plug disconnected and solenoid valve plug (existing transmission wiring) connected Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to 'pin 41' of the Tiptronic control module plug for a short time. A distinct clicking sound should be heard immediately from the shift solenoid valve. Go to Step 9 Shift solenoid valve stiff. Go to Step 8 7 Check the mechanical functionality of the shift solenoid valve (S1) directly at the valve: Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to the shift solenoid valve for a short time. A distinct click should be heard from the shift solenoid valve. Go to Step 9 Shift solenoid valve stiff. Go to Step 8 8 Replace shift solenoid valve (S1) Only replace if the wiring in the transmission was checked for chafing damage and found to be OK. --> End 9 Replace control module See note on replacing control modules! --> End

Shift solenoid valve (S2) [Shift Solenoid 'B' Electrical]

Note. The ignition must be switched off and then switched on again in order to display an error message in the instrument cluster.

Note. Please refer to ' LIMP-HOME MODE 1 ' table in the main chapter entitled 'Control module function (coding/programming)'!

Note. The 'Diagnosis/troubleshooting' shown below is adapted to suit the fault type displayed in the tester (please note fault type numbering 1, 2,... etc.!). The fault memory Info key [F8] on the Porsche System Tester II No. 9588 can be used to read out the fault type in the 'extended fault memory'.

1. 1.) 'Open circuit/short circuit to B+': A short circuit to B+ causes the shift solenoid valve (S2) to be continually activated
2. 1.) 'Open circuit/short circuit to B+': An open circuit prevents activation of the shift solenoid valve (S2)
3. 2.) 'Short circuit to ground': A short circuit to ground prevents activation of the shift solenoid valve (S2)

Tiptronic control module plug

1. Pin 15 'voltage of shift solenoid valve (S2)', to existing transmission wiring plug 'pin A2'

Data on shift solenoid valve (S2)

1. Max. voltage drop on Tiptronic control module: 1.5 V
2. Operating voltage (during switching): 10.5 V to 16.5 V
3. Max. voltage drop in wiring: 0.08 V
4. Max. power consumption: 1.9 A
5. Default internal resistance: 13 ± 2 ohms (at 20°C)

Note. Visual inspection: In the next troubleshooting section, please check first that the affected 'pins' on the Tiptronic control module plug connection and the 'pins' on the 'existing transmission wiring' plug connection are neither damaged nor corroded. Remove any soiling or corrosion/oxidation. Replace damaged parts/wires.

Note. Replacing control module: Before replacing the 'Tiptronic control module', the ground connections, power supply and plug connections on the control module must be checked. Please observe the coding of the control module. After the test drive, read out the fault memory again with the Porsche System Tester II No. 9588. Additional causes of faults that could damage the 'Tiptronic control module' should be detected and remedied.

1. Troubleshooting only for fault type: 'Open circuit/short circuit to B+' TROUBLESHOOTING PROCEDURE OPEN CIRCUIT/SHORT CIRCUIT TO B+ Work instruction Display OK If not OK 1 Check for short circuit to B+ with 'Tiptronic control module' plug disconnected and solenoid valve plug connected (existing transmission wiring): Switch off ignition Pull plug off Tiptronic control module Switch on ignition Measure voltage between 'pin 15' and ground on Tiptronic control module plug < 0.3 V Go to Step 2 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 2 Check for short circuit with both 'Tiptronic control module' plug and solenoid valve plug disconnected (existing transmission wiring): Switch off ignition Measure resistance between 'pin A2' and pins' Al, A3, A5, A7, A9, A11, A13' on solenoid valve plug (existing transmission wiring) infinity ohms Go to Step 3 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 3 Check for open circuit with 'Tiptronic control module' plug disconnected and solenoid valve plug connected (existing transmission wiring): Switch off ignition Measure resistance between 'pin 15' and ground on Tiptronic control module plug 13 ± 2 ohms (at 20°C) Go to Step 7 Go to Step 4 4 Check for open circuit with both 'Tiptronic control module' plug and solenoid valve plug disconnected (existing transmission wiring): Switch off ignition Pull off solenoid valve plug (existing transmission wiring) Measure resistance between 'pin 15' on Tiptronic control module plug and 'pin A2' of solenoid valve plug (existing transmission wiring) < 2 ohms Go to Step 5 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 5 Check wire in the transmission for open circuit: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid) Remove ATF filter, perform visual inspection of plug and wiring: Switch off ignition Solenoid valve plug (existing transmission wiring) connected Measure resistance between 'pin 15' on Tiptronic control module plug and shift solenoid valve (S2) plug < 2 ohms Go to Step 6 Replace wiring harness in the transmission. --> End 6 Check shift solenoid valve for open circuit: Measure resistance between shift solenoid valve (S2) plug and housing. 13 ± 2 ohms (at 20°C) Go to Step 8 Winding interrupted! Go to Step 9 7 Check mechanical functionality of shift solenoid valve (S2) using Tiptronic control module plug: Tiptronic control module plug disconnected and solenoid valve plug (existing transmission wiring) connected Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to 'pin 15' of the Tiptronic control module plug for a short time. A distinct clicking sound should be heard immediately from the shift solenoid valve. Go to Step 10 Go to Step 8 8 Check the mechanical functionality of the shift solenoid valve (S2) directly at the valve: Pull plug off the shift solenoid valve (S2). Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to the shift solenoid valve for a short time. A distinct click should be heard from the shift solenoid valve. Go to Step 10 Shift solenoid valve stiff. Go to Step 9 9 Replace shift solenoid valve (S2) Only replace if the wiring in the transmission was checked for chafing damage and found to be OK. --> End 10 Replace control module See note on replacing control modules! --> End
2. Troubleshooting only for fault type: 'Short circuit to ground' TROUBLESHOOTING PROCEDURE SHORT CIRCUIT TO GROUND Work instruction Display OK If not OK 1 Check for short circuit to ground with 'Tiptronic control module' plug disconnected and solenoid valve plug connected (existing transmission wiring): Switch off ignition Pull plug off Tiptronic control module Measure resistance between 'pin 15' and ground on Tiptronic control module plug. 13 ± 2 ohms (at 20°C) Go to Step 6 Go to Step 2 2 Check for short circuit to ground with both 'Tiptronic control module' plug and solenoid valve plug disconnected (existing transmission wiring): Pull off solenoid valve plug (existing transmission wiring) Measure resistance between 'pin 15' and ground on Tiptronic control module plug. infinity ohms Go to Step 3 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 3 Check for short circuit with both 'Tiptronic control module' plug and solenoid valve plug disconnected (existing transmission wiring): Measure resistance between 'pin A2' and pins 'A4, A6, A8, A10, A12, A14' on solenoid valve plug (existing transmission wiring). infinity ohms Go to Step 4 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 4 Check wire in the transmission for short circuit to ground: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid) Remove ATF filter, perform visual inspection of plug and wiring: Pull plug off the shift solenoid valve (S2). Measure resistance between disconnected plug (wiring side) and ground (transmission housing). infinity ohms Go to Step 5 Replace wiring harness in the transmission. --> End 5 Check directly at the valve for short circuit to ground in the shift solenoid valve (S2): Pull plug off the shift solenoid valve (S2). Measure resistance between plug on disconnected shift solenoid valve (S2) and ground (transmission housing). 13 ± 2 ohms (at 20°C) Go to Step 7 Shift solenoid valve stiff. Go to Step 8 6 Check mechanical functionality of shift solenoid valve (S2) using Tiptronic control module plug: Tiptronic control module plug disconnected and solenoid valve plug (existing transmission wiring) connected Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to 'pin 15' of the Tiptronic control module plug for a short time. A distinct clicking sound should be heard immediately from the shift solenoid valve. Go to Step 9 Shift solenoid valve stiff. Go to Step 8 7 Check the mechanical functionality of the shift solenoid valve (S2) directly at the valve: Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to the shift solenoid valve for a short time. A distinct click should be heard from the shift solenoid valve. Go to Step 9 Shift solenoid valve stiff. Go to Step 8 8 Replace shift solenoid valve (S2) Only replace if the wiring in the transmission was checked for chafing damage and found to be OK. --> End 9 Replace control module See note on replacing control modules! --> End

Shift solenoid valve C3 (modulation pressure) [Pressure Control Solenoid 'E' Electrical]

Note. The ignition must be switched off and then switched on again in order to display an error message in the instrument cluster.

Note. Please refer to ' LIMP-HOME MODE 1 ' table in the main chapter entitled 'Control module function (coding/programming)'!

Use the 'Actual values' menu in the Porsche System Tester II No. 9588 to check the transmission status and the actual values of the shift solenoid valves and sensors.

Note. The 'Diagnosis/troubleshooting' shown below is adapted to suit the fault type displayed in the tester (please note fault type numbering 1, 2,... etc.!). The fault memory Info key [F8] on the Porsche System Tester II No. 9588 can be used to read out the fault type in the 'extended fault memory'.

1. 1.) 'Short circuit to B+': A short circuit to B+ causes the shift solenoid valve C3 (modulation pressure) to be continually activated
2. 2.) 'Open circuit/short circuit to ground': A short circuit to ground prevents activation of the shift solenoid valve C3 (modulation pressure)
3. 2.) 'Open circuit/short circuit to ground': An open circuit prevents activation of the shift solenoid valve C3 (modulation pressure)
4. 3.) 'Electrical fault in electric circuit': Shift solenoid valve C3 (modulation pressure) has no or limited function

Tiptronic control module plug

1. Pin 1 'ground', from ground pin 'MB26'
2. Pin 2 'ground', from ground pin 'MB26'
3. Pin 18 'ground for shift solenoid valve C3 (modulation pressure)', to existing transmission wiring plug 'pin A8'
4. Pin 27 'terminal 15', from fuse carrier at right of dashboard 'fuse 51'
5. Pin 28 'terminal 15', from fuse carrier at right of dashboard 'fuse 51'
6. Pin 30 'voltage/current for shift solenoid valve C3 (modulation pressure)', to existing transmission wiring plug 'pin A7'

Scheme 29

1 - Tiptronic control module

2 - Shift solenoid valve C3 (modulation pressure)

18 - Pin (18)

30 - Pin (30)

I - Current flow

Data on shift solenoid valve C3 (modulation pressure)

1. Max. voltage drop on Tiptronic control module: 1.5 V
2. Operating voltage (during switching): 10.5 V to 16.5 V
3. Max. voltage drop in wiring: 0.08 V
4. Max. power consumption: 1.0 A
5. Default internal resistance: 5.3 ± 0.3 ohms (at 20°C)

Note. Visual inspection: In the next troubleshooting section, please check first that the affected 'pins' on the Tiptronic control module plug connection and the 'pins' on the 'existing transmission wiring' plug connection are neither damaged nor corroded. Remove any soiling or corrosion/oxidation. Replace damaged parts/wires.

Note. Replacing control module: Before replacing the 'Tiptronic control module', the ground connections, power supply and plug connections on the control module must be checked. Please observe the coding of the control module. After the test drive, read out the fault memory again with the Porsche System Tester II No. 9588. Additional causes of faults that could damage the 'Tiptronic control module' should be detected and remedied.

1. Troubleshooting only for fault type: 'Short circuit to B+' TROUBLESHOOTING PROCEDURE SHORT CIRCUIT TO B+ Work instruction Display OK If not OK 1 Check for short circuit to B+ with 'Tiptronic control module' plug disconnected and solenoid valve plug connected (existing transmission wiring): Ignition off Pull plug off Tiptronic control module Ignition on Measure voltage between 'pins 30, 18' and ground on Tiptronic control module plug. < 0.3 V Go to Step 2 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 2 Check for short circuit with 'Tiptronic control module' plug disconnected and solenoid valve plug connected (existing transmission wiring): Ignition off Measure resistance between 'pins 30, 18' and pins' 4, 5, 15, 16, 30, 31, 41, 42' on Tiptronic control module plug. infinity ohms Go to Step 4 Go to Step 3 3 Check for short circuit with both 'Tiptronic control module' plug and solenoid valve plug disconnected (existing transmission wiring): Measure resistance between 'pins 30, 18' and pins '4, 5, 15, 16, 30, 31, 41, 42' on Tiptronic control module plug. infinity ohms, Go to Step 6 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 4 Check mechanical functionality of shift solenoid valve C3 (modulation pressure) using Tiptronic control module plug: Tiptronic control module plug disconnected and solenoid valve plug (existing transmission wiring) connected Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to 'pin 30' of the Tiptronic control module plug for a short time. 'Pin 18' must be connected to ground. A distinct clicking sound should be heard immediately from the shift solenoid valve. Go to Step 8 Go to Step 5 5 Check the mechanical functionality of the shift solenoid valve C3 (modulation pressure) directly at the valve: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter, perform visual inspection of plug and wiring: Pull plug off the shift solenoid valve C3 (modulation pressure). Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to 'pin A7' and ground to 'pin A8' of the shift solenoid valve for a short time. A distinct clicking sound should be heard immediately from the shift solenoid valve. Go to Step 8 Shift solenoid valve stiff. Go to Step 7 6 Replace wiring harness in the transmission (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter. --> End 7 Replace shift solenoid valve C3 (modulation pressure) Only replace if the wiring in the transmission was checked for chafing damage and found to be OK. --> End 8 Replace control module See note on replacing control modules! --> End
2. Troubleshooting only for fault type: 'Open circuit/short circuit to ground' TROUBLESHOOTING PROCEDURE SHORT CIRCUIT TO GROUND Work instruction Display OK If not OK 1 Check the 'shift solenoid valve C3 (modulation pressure)' activation wire and the ground supply wire for a short circuit with respect to each other and an open circuit: Ignition off Pull plug off 'Tiptronic control module' Measure resistance between 'pin 30' and 'pin 18' on Tiptronic control module plug. 5.3 ± 0.3 ohms Go to Step 4 If the measured resistance is less than the default value: Go to Step 2 If the measured resistance is 'infinity ohms': Go to Step 10 2 Check the shift solenoid valve C3 (modulation pressure) activation wire and the ground supply wire for a short circuit with respect to each other: Pull off solenoid valve plug (existing transmission wiring) Measure resistance between 'pin 30' and 'pin 18' on Tiptronic control module plug. infinity ohms Go to Step 3 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 3 Check the shift solenoid valve C3 (modulation pressure) activation wire and the ground supply wire in the transmission for a short circuit with respect to each other: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter, perform visual inspection of plug and wiring: Pull plug off the shift solenoid valve C3 (modulation pressure) Measure resistance between 'pin A8' and 'pin A7' on the disconnected plug. infinity ohms Go to Step 12 Go to Step 15 4 Check the shift solenoid valve C3 (modulation pressure) activation wire and the ground supply wires of the shift solenoid valves for a short circuit with respect to each other: Measure resistance between 'pin 30' and pins '6, 17, 32, 43, 44' on Tiptronic control module plug. infinity ohms Go to Step 6 Go to Step 5 5 Check the shift solenoid valve C3 (modulation pressure) activation wire and the ground supply wires of the shift solenoid valves for a short circuit with respect to each other: Pull off solenoid valve plug (existing transmission wiring) Measure resistance between 'pin 30' and pins '6, 17, 32, 43, 44' on Tiptronic control module plug. infinity ohms Go to Step 15 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 6 Check for short circuit to ground in the shift solenoid valve C3 (modulation pressure) activation wire: Measure resistance between 'pin 30' and ground on Tiptronic control module plug. infinity ohms Go to Step 13 Go to Step 7 7 Check for short circuit to ground in the shift solenoid valve C3 (modulation pressure) activation wire: Pull off solenoid valve plug (existing transmission wiring) Measure resistance between 'pin 30' and ground on Tiptronic control module plug. infinity ohms Go to Step 8 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 8 Check for short circuit to ground in the shift solenoid valve C3 (modulation pressure) activation wire in the transmission: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter, perform visual inspection of plug and wiring: Pull plug off the shift solenoid valve C3 (modulation pressure) Measure resistance between 'pin A7' on disconnected plug (wiring side) and ground (transmission housing). infinity ohms Go to Step 9 Go to Step 15 9 Check for short circuit to ground in the coil in the shift solenoid valve C3 (modulation pressure): Measure resistance between 'pin A7' on shift solenoid valve C3 (modulation pressure) and ground (transmission housing). infinity ohms Go to Step 14 Short circuit to ground in coil. Go to Step 16 10 Check for open circuit in the shift solenoid valve C3 (modulation pressure) activation wire and ground supply wire: Pull off solenoid valve plug (existing transmission wiring) Measure resistance in the wires between 'pin 18, 30' of Tiptronic control module plug and 'pin A8, A7' of shift solenoid valve C3 (modulation pressure) plug. < 2 ohms Go to Step 11 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 11 Check for open circuit in the activation wire and ground supply wire of the shift solenoid valve C3 (modulation pressure) in the transmission: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter, perform visual inspection of plug and wiring: Connect solenoid valve plug (existing transmission wiring) Pull plug off the shift solenoid valve C3 (modulation pressure) Measure resistance between 'pin 18, 30' of Tiptronic control module plug and 'pin A8, A7' of shift solenoid valve C3 (modulation pressure) plug. < 2 ohms Go to Step 12 Go to Step 15 12 Check shift solenoid valve C3 (modulation pressure) coil for open circuit and short circuit: Measure resistance between 'pin A7' and 'pin A8' on shift solenoid valve C3 (modulation pressure). 5.3 + 0.3 ohms (at 20°C) Go to Step 14 Open circuit or short circuit in coil. Go to Step 16 13 Check mechanical functionality of shift solenoid valve C3 (modulation pressure) using Tiptronic control module plug: Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to 'pin 30' of the Tiptronic control module plug for a short time. 'Pin 18' must be connected to ground. A distinct clicking sound should be heard immediately from the shift solenoid valve. Go to Step 17 Shift solenoid valve stiff. Go to Step 16 14 Check the mechanical functionality of the shift solenoid valve C3 (modulation pressure) directly at the valve: Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to 'pin A7' and ground to 'pin A8' of the shift solenoid valve for a short time. A distinct clicking sound should be heard immediately from the shift solenoid valve. Go to Step 17 Shift solenoid valve stiff. Go to Step 16 15 Replace wiring harness in the transmission (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter. --> End 16 Replace shift solenoid valve C3 (modulation pressure) Only replace if the wiring in the transmission was checked for chafing damage and found to be OK. --> End 17 Replace control module See note on replacing control modules! --> End
3. Troubleshooting only for fault type: 'Electrical fault in electric circuit' NOTE: If the fault '0364 Power supply, terminal 15' is also stored in addition to this fault, look for the cause of the fault on the power supply side of the 'Tiptronic control module'! TROUBLESHOOTING PROCEDURE ELECTRICAL FAULT IN ELECTRIC CIRCUIT Work instruction Display OK If not OK 1 Check battery voltage/current and charge voltage/ current on three-phase generator: Engine speed > 2,000 rpm. Measure charge voltage/ current of generator. 11.4 to 14.5 V Go to Step 2 Charge battery if necessary, replace if faulty. Wiring/regulator or diodes faulty. Repair wires or generator. After carrying out repairs, erase the fault memory and then read out the fault memory again while observing the diagnostic conditions. If no faults are stored in memory: --> End If the fault is still present: Go to Step 2 2 Check terminal 15 power supply to Tiptronic control module: Ignition off Pull plug off Tiptronic control module Ignition on Measure voltage between 'pins 27, 28' and ground on Tiptronic control module plug. 10.5 to 14.5 V Go to Step 3 Check fuse '51' in fuse carrier at right of dashboard (resistance measurement). Check power supply lines for short circuit to ground: Go to Step 4 3 Check ground supply to Tiptronic control module: Measure voltage between 'pin 1, 2 and battery positive connection'. 10.5 to 14.5 V Go to Step 4 Check ground lead for short circuit to B+: Go to Step 5 4 Check power supply lines for short circuit to ground: Ignition off Measure voltage between 'pin 27, 28 and battery positive connection' on Tiptronic control module plug. < 0.3 V Go to Step 5 Short circuit to ground in Tiptronic control module plug leads 'pin 27, 28 and fuse 51' in fuse carrier at right of dashboard. Repair wire and replace faulty fuse. --> End 5 Check ground supply lines for short circuit to B+: Ignition on Measure voltage between 'pin 1, 2 and body ground'. < 0.3 V Go to Step 6 Short circuit to B+ in Tiptronic control module plug leads and 'body ground point 26'. Repair wire(s) and replace faulty fuse. --> End 6 Check voltage supply lines for open circuit: Ignition off Measure resistance on Tiptronic control module plug between 'pin 27, 28 and fuse 51' in fuse carrier at right of dashboard. < 0.5 ohms Go to Step 7 Open circuit in wires to fuse carrier at right of dashboard. Repair wire(s). Check fuse --> End 7 Check ground supply lines for open circuit: Measure resistance between 'pin 1, 2 and body ground' on Tiptronic control module plug. < 0.5 ohms Go to Step 8 Open circuit in Tiptronic control module and body ground wires. Repair wire(s). --> End 8 Check terminal 15 power supply at fuse: Measure voltage between fuse plug '51 and body ground' in fuse carrier at right of dashboard. 10.5 V to 14.5 V Go to Step 9 Short circuit/contact resistance/corroded or loose connections near or in fuse carrier. Repair if possible, otherwise replace fuse carrier at right of dashboard. --> End 9 Continue troubleshooting in accordance with the 'Diagnosis/troubleshooting' tables: Troubleshooting only for fault type: 'Short circuit to B+' Troubleshooting only for fault type: 'Open circuit/short circuit to ground' Follow the work instructions in the tables and look for the fault on the page that describes the activation of the shift solenoid valve C3 (modulation pressure). --> End

Note. Please refer to ' LIMP-HOME MODE 1 ' table in the main chapter entitled 'Control module function (coding/programming)'!

The torque converter lockup clutch must be closed while driving, starting in 'gear 2' with an engine speed of approx. '2000 rpm'. Use the 'Actual values' menu in the Porsche System Tester II No. 9588 to check the status based on engine speed and turbine speed. Engine speed = turbine speed: Clutch is closed.

Note. The 'Diagnosis/troubleshooting' shown below is adapted to suit the fault type displayed in the tester (please note fault type numbering 1, 2,... etc.!). The fault memory Info key [F8] on the Porsche System Tester II No. 9588 can be used to read out the fault type in the 'extended fault memory'.

1. 1.) 'Short circuit to B+': A short circuit to B+ causes the shift solenoid valve UK (modulation pressure) to be continually activated
2. 2.) 'Open circuit/short circuit to ground': A short circuit to ground prevents activation of the shift solenoid valve UK (modulation pressure)
3. 2.) 'Open circuit/short circuit to ground': An open circuit prevents activation of the shift solenoid valve UK (modulation pressure)
4. 3.) 'Electrical fault in electric circuit': Shift solenoid valve UK (modulation pressure) has no or limited function

Tiptronic control module plug

1. Pin 1 'ground', from ground pin MB26
2. Pin 2 'ground', from ground pin MB26
3. Pin 5 'voltage/current for shift solenoid valve UK (modulation pressure)', to existing transmission wiring plug 'pin All'
4. Pin 27 'terminal 15', from fuse carrier at right of dashboard 'fuse 51'
5. Pin 28 'terminal 15', from fuse carrier at right of dashboard 'fuse 51'
6. Pin 43 'ground for shift solenoid valve UK (modulation pressure)', to existing transmission wiring plug 'pin A12'

Data on shift solenoid valve UK (modulation pressure)

1. Max. voltage drop on Tiptronic control module: 1.5 V
2. Operating voltage (during switching): 10.5 V to 16.5 V
3. Max. voltage drop in wiring: 0.08 V
4. Max. power consumption: 1.0 A
5. Default internal resistance: 5.3 ± 0.3 ohms (at 20°C)

Note. Visual inspection: In the next troubleshooting section, please check first that the affected 'pins' on the Tiptronic control module plug connection and the 'pins' on the 'existing transmission wiring' plug connection are neither damaged nor corroded. Remove any soiling or corrosion/oxidation. Replace damaged parts/wires.

Note. Replacing control module: Before replacing the 'Tiptronic control module', the ground connections, power supply and plug connections on the control module must be checked. Please observe the coding of the control module. After the test drive, read out the fault memory again with the Porsche System Tester II No. 9588. Additional causes of faults that could damage the 'Tiptronic control module' should be detected and remedied.

1. Troubleshooting only for fault type: 'Short circuit to B+' TROUBLESHOOTING PROCEDURE SHORT CIRCUIT TO B+ Work instruction Display OK If not OK 1 Check for short circuit to B+ with 'Tiptronic control module' plug disconnected and solenoid valve plug connected (existing transmission wiring): Ignition off Pull plug off Tiptronic control module Ignition on Measure voltage between 'pins 5, 43' and ground on Tiptronic control module plug. < 0.3 V Go to Step 2 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 2 Check for short circuit with 'Tiptronic control module' plug disconnected and solenoid valve plug connected (existing transmission wiring): Ignition off Measure resistance between 'pins 5, 43' and pins '4, 15, 16, 30, 31, 41, 42' on Tiptronic control module plug. infinity ohms Go to Step 4 Go to Step 3 3 Check for short circuit with both 'Tiptronic control module' plug and solenoid valve plug disconnected (existing transmission wiring): Measure resistance between 'pins 5, 43' and pins '4, 15, 16, 30, 31, 41, 42' on Tiptronic control module plug. infinity ohms Go to Step 6 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 4 Check mechanical functionality of shift solenoid valve UK (modulation pressure) using Tiptronic control module plug: Tiptronic control module plug disconnected and solenoid valve plug (existing transmission wiring) connected Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to 'pin 5' of the Tiptronic control module plug for a short time. 'Pin 43' must be connected to ground. A distinct clicking sound should be heard immediately from the shift solenoid valve. Go to Step 8 Go to Step 5 5 Check the mechanical functionality of the shift solenoid valve UK (modulation pressure) directly at the valve: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter, perform visual inspection of plug and wiring: Pull plug off the shift solenoid valve UK (modulation pressure). Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to 'pin All' and ground to 'pin A12' of the shift solenoid valve for a short time. A distinct clicking sound should be heard immediately from the shift solenoid valve. Go to Step 8 Shift solenoid valve stiff. Go to Step 7 6 Replace wiring harness in the transmission (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter. --> End 7 Replace shift solenoid valve UK (modulation pressure) Only replace if the wiring in the transmission was checked for chafing damage and found to be OK. --> End 8 Replace control module See note on replacing control modules! --> End
2. Troubleshooting only for fault type: 'Open circuit/short circuit to ground' TROUBLESHOOTING PROCEDURE SHORT CIRCUIT TO GROUND Work instruction Display OK If not OK 1 Check the 'shift solenoid valve UK (modulation pressure)' activation wire and the ground supply wire for a short circuit with respect to each other and an open circuit: Ignition off Pull plug off 'Tiptronic control module' Measure resistance between 'pin 5' and 'pin 43' on Tiptronic control module plug. 5.3 ± 0.3 ohms Go to Step 4 If the measured resistance is less than the default value: Go to Step 2 If the measured resistance is 'infinity ohms': Go to Step 10 2 Check the shift solenoid valve UK (modulation pressure) activation wire and the ground supply wire for a short circuit with respect to each other: Pull off solenoid valve plug (existing transmission wiring) Measure resistance between 'pin 5' and 'pin 43' on Tiptronic control module plug. infinity ohms Go to Step 3 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 3 Check the shift solenoid valve UK (modulation pressure) activation wire and the ground supply wire in the transmission for a short circuit with respect to each other: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter, perform visual inspection of plug and wiring: Pull plug off the shift solenoid valve UK (modulation pressure). Measure resistance between 'pin A12' and 'pin All' on the disconnected plug. infinity ohms Go to Step 12 Go to Step 15 4 Check the shift solenoid valve UK (modulation pressure) activation wire and the ground supply wires of the shift solenoid valves for a short circuit with respect to each other: Measure resistance between 'pin 5' and pins '6, 17, 18, 32, 44' on Tiptronic control module plug. infinity ohms Go to Step 6 Go to Step 5 5 Check the shift solenoid valve UK (modulation pressure) activation wire and the ground supply wires of the shift solenoid valves for a short circuit with respect to each other: Pull off solenoid valve plug (existing transmission wiring) Measure resistance between 'pin 5' and pins '6, 17, 18, 32, 44' on Tiptronic control module plug. infinity ohms Go to Step 15 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 6 Check for short circuit to ground in the shift solenoid valve UK (modulation pressure) activation wire: Measure resistance between 'pin 5' and ground on Tiptronic control module plug. infinity ohms Go to Step 13 Go to Step 7 7 Check for short circuit to ground in the shift solenoid valve UK (modulation pressure) activation wire: Pull off solenoid valve plug (existing transmission wiring) Measure resistance between 'pin 5' and ground on Tiptronic control module plug. infinity ohms Go to Step 8 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 8 Check for short circuit to ground in the shift solenoid valve UK (modulation pressure) activation wire in the transmission: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter, perform visual inspection of plug and wiring: Pull plug off the shift solenoid valve UK (modulation pressure). Measure resistance between 'pin All' on disconnected plug (wiring side) and ground (transmission housing). infinity ohms Go to Step 9 Go to Step 15 9 Check for short circuit to ground in the coil in the shift solenoid valve UK (modulation pressure): Measure resistance between 'pin All' on shift solenoid valve UK (modulation pressure) and ground (transmission housing). infinity ohms Go to Step 14 Short circuit to ground in coil. Go to Step 16 10 Check for open circuit in the shift solenoid valve UK (modulation pressure) activation wire and ground supply wire: Pull off solenoid valve plug (existing transmission wiring) Measure resistance in the wires between 'pin 43, 5' of Tiptronic control module plug and 'pin A12, All' of shift solenoid valve UK (modulation pressure) plug. < 2 ohms Go to Step 11 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 11 Check for open circuit in the activation wire and ground supply wire of the shift solenoid valve UK (modulation pressure) in the transmission: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter, perform visual inspection of plug and wiring: Connect solenoid valve plug (existing transmission wiring) Pull plug off the shift solenoid valve UK (modulation pressure) Measure resistance between 'pin 43, 5' of Tiptronic control module plug and 'pin A12, All' of shift solenoid valve UK (modulation pressure) plug. < 2 ohms Go to Step 12 Go to Step 15 12 Check shift solenoid valve UK (modulation pressure) coil for open circuit and short circuit: Measure resistance between 'pin All' and 'pin A12' on shift solenoid valve UK (modulation pressure). 5.3 ± 0.3 ohms (at 20°C) Go to Step 14 Open circuit or short circuit in coil. Go to Step 16 13 Check mechanical functionality of shift solenoid valve UK (modulation pressure) using Tiptronic control module plug: Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to 'pin 5' of the Tiptronic control module plug for a short time. 'Pin 43' must be connected to ground. A distinct clicking sound should be heard immediately from the shift solenoid valve. Go to Step 17 Shift solenoid valve stiff. Go to Step 16 14 Check the mechanical functionality of the shift solenoid valve UK (modulation pressure) directly at the valve: Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to 'pin All' and ground to 'pin A12' of the shift solenoid valve for a short time. A distinct clicking sound should be heard immediately from the shift solenoid valve. Go to Step 17 Shift solenoid valve stiff. Go to Step 16 15 Replace wiring harness in the transmission (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter. --> End 16 Replace shift solenoid valve UK (modulation pressure) Only replace if the wiring in the transmission was checked for chafing damage and found to be OK. --> End 17 Replace control module See note on replacing control modules! --> End
3. Troubleshooting only for fault type: 'Electrical fault in electric circuit' NOTE: If the fault '0364 Power supply, terminal 15' is also stored in addition to this fault, look for the cause of the fault on the power supply side of the 'Tiptronic control module'! TROUBLESHOOTING PROCEDURE ELECTRICAL FAULT IN ELECTRIC CIRCUIT Work instruction Display OK If not OK 1 Check battery voltage/current and charge voltage/ current on three-phase generator: Engine speed > 2,000 rpm. Measure charge voltage/ current of generator. 11.4 to 14.5 V Go to Step 2 Charge battery if necessary, replace if faulty. Wiring/regulator or diodes faulty. Repair wires or generator. After carrying out repairs, erase the fault memory and then read out the fault memory again while observing the diagnostic conditions. If no faults are stored in memory: --> End If the fault is still present: Go to Step 2 2 Check terminal 15 power supply to Tiptronic control module: Ignition off Pull plug off Tiptronic control module Ignition on Measure voltage between 'pins 27, 28' and ground on Tiptronic control module plug. 10.5 to 14.5 V Go to Step 3 Check fuse '51' in fuse carrier at right of dashboard (resistance measurement). Check power supply lines for short circuit to ground: Go to Step 4 3 Check ground supply to Tiptronic control module: Measure voltage between 'pin 1, 2 and battery positive connection'. 10.5 to 14.5 V Go to Step 4 Check ground lead for short circuit to B+: Go to Step 5 4 Check power supply lines for short circuit to ground: Ignition off Measure voltage between 'pin 27, 28 and battery positive connection' on Tiptronic control module plug. < 0.3 V Go to Step 5 Short circuit to ground in Tiptronic control module plug leads' pin 27, 28 and fuse 51' in fuse carrier at right of dashboard. Repair wire and replace faulty fuse. --> End 5 Check ground supply lines for short circuit to B+: Ignition on Measure voltage between 'pin 1, 2 and body ground'. < 0.3 V Go to Step 6 Short circuit to B+ in Tiptronic control module plug leads and 'body ground point 26'. Repair wire(s) and replace faulty fuse. --> End 6 Check voltage supply lines for open circuit: Ignition off Measure resistance on Tiptronic control module plug between 'pin 27, 28 and fuse 51' in fuse carrier at right of dashboard. < 0.5 ohms Go to Step 7 Open circuit in wires to fuse carrier at right of dashboard. Repair wire(s). Check fuse. --> End 7 Check ground supply lines for open circuit: Measure resistance between 'pin 1, 2 and body ground' on Tiptronic control module plug. < 0.5 ohms Go to Step 8 Open circuit in Tiptronic control module and body ground wires. Repair wire(s). --> End 8 Check terminal 15 power supply at fuse: Measure voltage between fuse plug '51 and body ground' in fuse carrier at right of dashboard. 10.5 V to 14.5 V Go to Step 9 Short circuit/contact resistance/corroded or loose connections near or in fuse carrier. Repair if possible, otherwise replace fuse carrier at right of dashboard. --> End 9 Continue troubleshooting in accordance with the 'Diagnosis/troubleshooting' tables: Troubleshooting only for fault type: 'Short circuit to B+' Troubleshooting only for fault type: 'Open circuit/short circuit to ground' Follow the work instructions in the tables and look for the fault on the page that describes the activation of the shift solenoid valve UK (modulation pressure). --> End

Shift solenoid valve C1 (modulation pressure) [Pressure Control Solenoid 'C' Electrical]

Note. The ignition must be switched off and then switched on again in order to display an error message in the instrument cluster.

Note. Please refer to ' LIMP-HOME MODE 1 ' table in the main chapter entitled 'Control module function (coding/programming)'!

Use the 'Actual values' menu in the Porsche System Tester II No. 9588 to check the transmission status and the actual values of the shift solenoid valves and sensors.

Note. The 'Diagnosis/troubleshooting' shown below is adapted to suit the fault type displayed in the tester (please note fault type numbering 1, 2,... etc.!). The fault memory Info key [F8] on the Porsche System Tester II No. 9588 can be used to read out the fault type in the 'extended fault memory'.

1. 1.) 'Short circuit to B+': A short circuit to B+ causes the shift solenoid valve C1 (modulation pressure) to be continually activated
2. 2.) 'Open circuit/short circuit to ground': A short circuit to ground prevents activation of the shift solenoid valve C1 (modulation pressure)
3. 2.) 'Open circuit/short circuit to ground': An open circuit prevents activation of the shift solenoid valve C1 (modulation pressure)
4. 3.) 'Electrical fault in electric circuit': Shift solenoid valve C1 (modulation pressure) has no or limited function

Tiptronic control module plug

1. Pin 1 'ground', from ground pin MB26
2. Pin 2 'ground', from ground pin MB26
3. Pin 6 'ground for shift solenoid valve C1 (modulation pressure)', to existing transmission wiring plug 'pin A4'
4. Pin 27 'terminal 15', from fuse carrier at right of dashboard 'fuse 51'
5. Pin 28 'terminal 15', from fuse carrier at right of dashboard 'fuse 51'
6. Pin 42 'voltage/current for shift solenoid valve C1 (modulation pressure)', to existing transmission wiring plug 'pin A3'

Data on shift solenoid valve C1 (modulation pressure)

1. Max. voltage drop on Tiptronic control module: 1.5 V
2. Operating voltage (during switching): 10.5 V to 16.5 V
3. Max. voltage drop in wiring: 0.08 V
4. Max. power consumption: 1.0 A
5. Default internal resistance: 5.3 ± 0.3 ohms (at 20°C)

Note. Visual inspection: In the next troubleshooting section, please check first that the affected 'pins' on the Tiptronic control module plug connection and the 'pins' on the 'existing transmission wiring' plug connection are neither damaged nor corroded. Remove any soiling or corrosion/oxidation. Replace damaged parts/wires.

Note. Replacing control module: Before replacing the 'Tiptronic control module', the ground connections, power supply and plug connections on the control module must be checked. Please observe the coding of the control module. After the test drive, read out the fault memory again with the Porsche System Tester II No. 9588. Additional causes of faults that could damage the 'Tiptronic control module' should be detected and remedied.

1. Troubleshooting only for fault type: 'Short circuit to B+' TROUBLESHOOTING PROCEDURE SHORT CIRCUIT TO B+ Work instruction Display OK If not OK 1 Check for short circuit to B+ with 'Tiptronic control module' plug disconnected and solenoid valve plug connected (existing transmission wiring): Ignition off Pull plug off Tiptronic control module Ignition on Measure voltage between 'pins 42, 6' and ground on Tiptronic control module plug. < 0.3 V Go to Step 2 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 2 Check for short circuit with 'Tiptronic control module' plug disconnected and solenoid valve plug connected (existing transmission wiring): Ignition off Measure resistance between 'pins 42, 6' and pins '4, 5, 15, 16, 30, 31, 41' on Tiptronic control module plug. infinity ohms Go to Step 4 Go to Step 3 3 Check for short circuit with both 'Tiptronic control module' plug and solenoid valve plug disconnected (existing transmission wiring): Measure resistance between 'pins 42, 6' and pins '4, 5, 15, 16, 30, 31, 41' on Tiptronic control module plug. infinity ohms, Go to Step 6 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 4 Check mechanical functionality of shift solenoid valve C1 (modulation pressure) using Tiptronic control module plug: Tiptronic control module plug disconnected and solenoid valve plug (existing transmission wiring) connected Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to 'pin 42' of the Tiptronic control module plug for a short time. 'Pin 6' must be connected to ground. A distinct clicking sound should be heard immediately from the shift solenoid valve. Go to Step 8 Go to Step 5 5 Check the mechanical functionality of the shift solenoid valve C1 (modulation pressure) directly at the valve: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter, perform visual inspection of plug and wiring: Pull plug off the shift solenoid valve C1 (modulation pressure). Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to 'pin A3' and ground to 'pin A4' of the shift solenoid valve for a short time. A distinct clicking sound should be heard immediately from the shift solenoid valve. Go to Step 8 Shift solenoid valve stiff. Go to Step 7 6 Replace wiring harness in the transmission (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter. --> End 7 Replace shift solenoid valve C1 (modulation pressure) Only replace if the wiring in the transmission was checked for chafing damage and found to be OK. --> End 8 Replace control module See note on replacing control modules! --> End
2. Troubleshooting only for fault type: 'Open circuit/short circuit to ground' TROUBLESHOOTING PROCEDURE OPEN CIRCUIT/SHORT CIRCUIT TO GROUND Work instruction Display OK If not OK 1 Check the 'shift solenoid valve C1 (modulation pressure)' activation wire and the ground supply wire for a short circuit with respect to each other and an open circuit: Ignition off Pull plug off 'Tiptronic control module' Measure resistance between 'pin 42' and 'pin 6' on Tiptronic control module plug. 5.3 ± 0.3 ohms Go to Step 4 If the measured resistance is less than the default value: Go to Step 2 If the measured resistance is 'infinity ohms': Go to Step 10 2 Check the shift solenoid valve C1 (modulation pressure) activation wire and the ground supply wire for a short circuit with respect to each other: Pull off solenoid valve plug (existing transmission wiring) Measure resistance between 'pin 42' and 'pin 6' on Tiptronic control module plug. infinity ohms Go to Step 3 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 3 Check the shift solenoid valve C1 (modulation pressure) activation wire and the ground supply wire in the transmission for a short circuit with respect to each other: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter, perform visual inspection of plug and wiring: Pull plug off the shift solenoid valve C1 (modulation pressure). Measure resistance between 'pin A4' and 'pin A3' on the disconnected plug. infinity ohms Go to Step 12 Go to Step 15 4 Check the shift solenoid valve C1 (modulation pressure) activation wire and the ground supply wires of the shift solenoid valves for a short circuit with respect to each other: Measure resistance between 'pin 42' and pins '17, 18, 32, 43, 44' on Tiptronic control module plug. infinity ohms Go to Step 6 Go to Step 5 5 Check the shift solenoid valve C1 (modulation pressure) activation wire and the ground supply wires of the shift solenoid valves for a short circuit with respect to each other: Pull off solenoid valve plug (existing transmission wiring) Measure resistance between 'pin 42' and pins '17, 18, 32, 43, 44' on Tiptronic control module plug. infinity ohms Go to Step 15 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 6 Check for short circuit to ground in the shift solenoid valve C1 (modulation pressure) activation wire: Measure resistance between 'pin 42' and ground on Tiptronic control module plug. infinity ohms Go to Step 13 Go to Step 7 7 Check for short circuit to ground in the shift solenoid valve C1 (modulation pressure) activation wire: Pull off solenoid valve plug (existing transmission wiring) Measure resistance between 'pin 42' and ground on Tiptronic control module plug. infinity ohms Go to Step 8 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 8 Check for short circuit to ground in the shift solenoid valve C1 (modulation pressure) activation wire in the transmission: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter, perform visual inspection of plug and wiring: Pull plug off the shift solenoid valve C1 (modulation pressure). Measure resistance between 'pin A3' on disconnected plug (wiring side) and ground (transmission housing). infinity ohms Go to Step 9 Go to Step 15 9 Check for short circuit to ground in the coil in the shift solenoid valve C1 (modulation pressure): Measure resistance between 'pin A3' on shift solenoid valve C1 (modulation pressure) and ground (transmission housing). infinity ohms Go to Step 14 Short circuit to ground in coil. Go to Step 16 10 Check for open circuit in the shift solenoid valve C1 (modulation pressure) activation wire and ground supply wire: Pull off solenoid valve plug (existing transmission wiring) Measure resistance in the wires between 'pin 6, 42' of Tiptronic control module plug and 'pin A4, A3' of shift solenoid valve C1 (modulation pressure) plug. < 2 ohms Go to Step 11 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 11 Check for open circuit in the activation wire and ground supply wire of the shift solenoid valve C1 (modulation pressure) in the transmission: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter, perform visual inspection of plug and wiring: Connect solenoid valve plug (existing transmission wiring) Pull plug off the shift solenoid valve C1 (modulation pressure). Measure resistance between 'pin 6, 42' of Tiptronic control module plug and 'pin A4, A3' of shift solenoid valve C1 (modulation pressure) plug. < 2 ohms Go to Step 12 Go to Step 15 12 Check shift solenoid valve C1 (modulation pressure) coil for open circuit and short circuit: Measure resistance between 'pin A3' and 'pin A4' on shift solenoid valve C1 (modulation pressure). 5.3 ± 0.3 ohms (at 20°C) Go to Step 14 Open circuit or short circuit in coil. Go to Step 16 13 Check mechanical functionality of shift solenoid valve C1 (modulation pressure) using Tiptronic control module plug: Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to 'pin 42' of the Tiptronic control module plug for a short time. 'Pin 6' must be connected to ground. A distinct clicking sound should be heard immediately from the shift solenoid valve. Go to Step 17 Shift solenoid valve stiff. Go to Step 16 14 Check the mechanical functionality of the shift solenoid valve C1 (modulation pressure) directly at the valve: Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to 'pin A3' and ground to 'pin A4' of the shift solenoid valve for a short time. A distinct clicking sound should be heard immediately from the shift solenoid valve. Go to Step 17 Shift solenoid valve stiff. Go to Step 16 15 Replace wiring harness in the transmission (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter. --> End 16 Replace shift solenoid valve C1 (modulation pressure) Only replace if the wiring in the transmission was checked for chafing damage and found to be OK. --> End 17 Replace control module See note on replacing control modules! --> End
3. Troubleshooting only for fault type: 'Electrical fault in electric circuit' NOTE: If the fault '0364 Power supply, terminal 15' is also stored in addition to this fault, look for the cause of the fault on the power supply side of the 'Tiptronic control module'! TROUBLESHOOTING PROCEDURE ELECTRICAL FAULT IN ELECTRIC CIRCUIT Work instruction Display OK If not OK 1 Check battery voltage/current and charge voltage/ current on three-phase generator: Engine speed > 2,000 rpm. Measure charge voltage/ current of generator. 11.4 to 14.5 V Go to Step 2 Charge battery if necessary, replace if faulty. Wiring/regulator or diodes faulty. Repair wires or generator. After carrying out repairs, erase the fault memory and then read out the fault memory again while observing the diagnostic conditions. If no faults are stored in memory: --> End If the fault is still present: Go to Step 2 2 Check terminal 15 power supply to Tiptronic control module: Ignition off Pull plug off Tiptronic control module Ignition on Measure voltage between 'pins 27, 28' and ground on Tiptronic control module plug. 10.5 to 14.5 V Go to Step 3 Check fuse '51' in fuse carrier at right of dashboard (resistance measurement). Check power supply lines for short circuit to ground: Go to Step 4 3 Check ground supply to Tiptronic control module: Measure voltage between 'pin 1, 2 and battery positive connection'. 10.5 to 14.5 V Go to Step 4 Check ground lead for short circuit to B+: Go to Step 5 4 Check power supply lines for short circuit to ground: Ignition off Measure voltage between 'pin 27, 28 and battery positive connection' on Tiptronic control module plug. < 0.3 V Go to Step 5 Short circuit to ground in Tiptronic control module plug leads 'pin 27, 28 and fuse 51' in fuse carrier at right of dashboard. Repair wire and replace faulty fuse. --> End 5 Check ground supply lines for short circuit to B+: Ignition on Measure voltage between 'pin 1, 2 and body ground'. < 0.3 V Go to Step 6 Short circuit to B+ in Tiptronic control module plug leads and 'body ground point 26'. Repair wire(s) and replace faulty fuse. --> End 6 Check voltage supply lines for open circuit: Ignition off Measure resistance on Tiptronic control module plug between 'pin 27, 28 and fuse 51' in fuse carrier at right of dashboard. < 0.5 ohms Go to Step 7 Open circuit in wires to fuse carrier at right of dashboard. Repair wire(s). Check fuse. --> End 7 Check ground supply lines for open circuit: Measure resistance between 'pin 1, 2 and body ground' on Tiptronic control module plug. < 0.5 ohms Go to Step 8 Open circuit in Tiptronic control module and body ground wires. Repair wire(s). --> End 8 Check terminal 15 power supply at fuse: Measure voltage between fuse plug '51 and body ground' in fuse carrier at right of dashboard. 10.5 V to 14.5 V Go to Step 9 Short circuit/contact resistance/corroded or loose connections near or in fuse carrier. Repair if possible, otherwise replace fuse carrier at right of dashboard. --> End 9 Continue troubleshooting in accordance with the 'Diagnosis/troubleshooting' tables: Troubleshooting only for fault type: 'Short circuit to B+' Troubleshooting only for fault type: 'Open circuit/short circuit to ground' Follow the work instructions in the tables and look for the fault on the page that describes the activation of the shift solenoid valve C1 (modulation pressure). --> End

Modulation pressure solenoid valve (main) [Pressure Control Solenoid 'A' Electrical]

Note. The ignition must be switched off and then switched on again in order to display an error message in the instrument cluster.

System in limp-home mode 1: Fault not caused by incorrect gear ratio or unusual switching!

Note. Please refer to ' LIMP-HOME MODE 1 ' table in the main chapter entitled 'Control module function (coding/programming)'!

Use the 'Actual values' menu in the Porsche System Tester II No. 9588 to check the transmission status and the actual values of the shift solenoid valves and sensors.

Note. The 'Diagnosis/troubleshooting' shown below is adapted to suit the fault type displayed in the tester (please note fault type numbering 1, 2,... etc.!). The fault memory Info key [F8] on the Porsche System Tester II No. 9588 can be used to read out the fault type in the 'extended fault memory'.

1. 1.) 'Short circuit to B+': A short circuit to B+ causes the modulation pressure solenoid valve (main) to be continually activated
2. 2.) 'Open circuit/short circuit to ground': A short circuit to ground prevents activation of the modulation pressure solenoid valve (main)
3. 2.) 'Open circuit/short circuit to ground': An open circuit prevents activation of the modulation pressure solenoid valve (main)
4. 3.) 'Electrical fault in electric circuit': Modulation pressure solenoid valve (main) has no or limited function

Tiptronic control module plug

1. Pin 1 'ground', from ground pin MB26
2. Pin 2 'ground', from ground pin MB26
3. Pin 17 'ground for modulation pressure solenoid valve (main)', to existing transmission wiring plug 'pin A14'
4. Pin 27 'terminal 15', from fuse carrier at right of dashboard 'fuse 51'
5. Pin 28 'terminal 15', from fuse carrier at right of dashboard 'fuse 51'
6. Pin 31 'voltage/current for modulation pressure solenoid valve (main)', to existing transmission wiring plug 'pin A13'

Scheme 30

1 - Tiptronic control module

2 - Modulation pressure solenoid valve (main)

17 - Pin (17)

31 - Pin (31)

I - Current flow

Data to modulation pressure solenoid valve (main)

1. Max. voltage drop on Tiptronic control module: 1.5 V
2. Operating voltage (during switching): 10.5 V to 16.5 V
3. Max. voltage drop in wiring: 0.08 V
4. Max. power consumption: 1.0 A
5. Default internal resistance: 5.3 ± 0.3 ohms (at 20°C)

Note. Visual inspection: In the next troubleshooting section, please check first that the affected 'pins' on the Tiptronic control module plug connection and the 'pins' on the 'existing transmission wiring' plug connection are neither damaged nor corroded. Remove any soiling or corrosion/oxidation. Replace damaged parts/wires.

Note. Replacing control module: Before replacing the 'Tiptronic control module', the ground connections, power supply and plug connections on the control module must be checked. Please observe the coding of the control module. After the test drive, read out the fault memory again with the Porsche System Tester II No. 9588. Additional causes of faults that could damage the 'Tiptronic control module' should be detected and remedied.

1. Troubleshooting only for fault type: 'Short circuit to B+' TROUBLESHOOTING PROCEDURE SHORT CIRCUIT TO B+ Work instruction Display OK If not OK 1 Check for short circuit to B+ with 'Tip-tonic control module' plug disconnected and solenoid valve plug connected (existing transmission wiring): Ignition off Pull plug off Tiptronic control module Ignition on Measure voltage between 'pins 31, 17' and ground on Tiptronic control module plug. < 0.3 V Go to Step 2 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 2 Check for short circuit with 'Tiptronic control module' plug disconnected and solenoid valve plug connected (existing transmission wiring): Ignition off Measure resistance between 'pins 31, 17' and pins '4, 5, 15, 16, 30, 41, 42' on Tiptronic control module plug. infinity ohms Go to Step 4 Go to Step 3 3 Check for short circuit with both 'Tiptronic control module' plug and solenoid valve plug disconnected (existing transmission wiring): Measure resistance between 'pins 31, 17' and pins '4, 5, 15, 16, 30, 41, 42' on Tiptronic control module plug. infinity ohms Go to Step 6 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 4 Check mechanical functionality of modulation pressure solenoid valve (main) using Tiptronic control module plug: Tiptronic control module plug disconnected and solenoid valve plug (existing transmission wiring) connected Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to 'pin 31' of the Tiptronic control module plug for a short time. 'Pin 17' must be connected to ground. A distinct clicking sound should be heard immediately from the shift solenoid valve. Go to Step 8 Go to Step 5 5 Check the mechanical functionality of the modulation pressure solenoid valve (main) directly at the valve: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter, perform visual inspection of plug and wiring: Pull plug off the modulation pressure solenoid valve (main). Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to 'pin A13' and ground to 'pin A14' of the shift solenoid valve for a short time. A distinct clicking sound should be heard immediately from the shift solenoid valve. Go to Step 8 Shift solenoid valve stiff. Go to Step 7 6 Replace wiring harness in the transmission (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter. --> End 7 Replace modulation pressure solenoid valve (main) Only replace if the wiring in the transmission was checked for chafing damage and found to be OK. --> End 8 Replace control module See note on replacing control modules! --> End
2. Troubleshooting only for fault type: 'Open circuit/short circuit to ground' TROUBLESHOOTING PROCEDURE OPEN CIRCUIT/SHORT CIRCUIT TO GROUND Work instruction Display OK If not OK 1 Check the 'modulation pressure solenoid valve (main)' activation wire and the ground supply wire for a short circuit with respect to each other and an open circuit: Ignition off Pull plug off Tiptronic control module Measure resistance between 'pin 31' and 'pin 17' on Tiptronic control module plug. 5.3 ± 0.3 ohms Go to Step 4 If the measured resistance is less than the default value: Go to Step 2 If the measured resistance is 'infinity ohms': Go to Step 10 2 Check the modulation pressure solenoid valve (main) activation wire and the ground supply wire for a short circuit with respect to each other: Pull off solenoid valve plug (existing transmission wiring) Measure resistance between 'pin 31' and 'pin 17' on Tiptronic control module plug. infinity ohms Go to Step 3 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 3 Check the modulation pressure solenoid valve (main) activation wire and the ground supply wire in the transmission for a short circuit with respect to each other: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter, perform visual inspection of plug and wiring: Pull plug off the modulation pressure solenoid valve (main). Measure resistance between 'pin A14' and 'pin A13' on the disconnected plug. infinity ohmsGo to Step 12 Go to Step 15M 4 Check the modulation pressure solenoid valve (main) activation wire and the ground supply wires of the shift solenoid valves for a short circuit with respect to each other: Measure resistance between 'pin 31' and pins '6, 18, 32, 43, 44' on Tiptronic control module plug. infinity ohms Go to Step 6 Go to Step 5 5 Check the modulation pressure solenoid valve (main) activation wire and the ground supply wires of the shift solenoid valves for a short circuit with respect to each other: Pull off solenoid valve plug (existing transmission wiring) Measure resistance between 'pin 31' and pins '6, 18, 32, 43, 44' on Tiptronic control module plug. infinity ohms Go to Step 15 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 6 Check for short circuit to ground in the modulation pressure solenoid valve (main) activation wire: Measure resistance between 'pin 31' and ground on Tiptronic control module plug. infinity ohms Go to Step 13 Go to Step 7 7 Check for short circuit to ground in the modulation pressure solenoid valve (main) activation wire: Pull off solenoid valve plug (existing transmission wiring) Measure resistance between 'pin 31' and ground on Tiptronic control module plug. infinity ohms Go to Step 8 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 8 Check for short circuit to ground in the modulation pressure solenoid valve (main) activation wire in the transmission: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter, perform visual inspection of plug and wiring: Pull plug off the modulation pressure solenoid valve (main). Measure resistance between 'pin A13' on disconnected plug (wiring side) and ground (transmission housing). infinity ohms Go to Step 9 Go to Step 15 9 Check for short circuit to ground in the modulation pressure solenoid valve (main) coil: Measure resistance between 'pin A13' on modulation pressure solenoid valve (main) and ground (transmission housing). infinity ohms Go to Step 14 Short circuit to ground in coil. Go to Step 16 10 Check for open circuit in the modulation pressure solenoid valve (main) activation wire and ground supply wire: Pull off solenoid valve plug (existing transmission wiring) Measure resistance in the wires between 'pin 17, 31' of Tiptronic control module plug and 'pin A14, A13' of modulation pressure solenoid valve (main) plug. < 2 ohms Go to Step 11 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 11 Check for open circuit in the modulation pressure solenoid valve (main) activation wire and ground supply wire in the transmission: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter, perform visual inspection of plug and wiring: Connect solenoid valve plug (existing transmission wiring) Pull plug off the modulation pressure solenoid valve (main). Measure resistance between 'pin 17, 31' of Tiptronic control module plug and 'pin A14, A13' of modulation pressure solenoid valve (main) plug. < 2 ohms Go to Step 12 Go to Step 15 12 Check modulation pressure solenoid valve (main) coil for open circuit and short circuit: Measure resistance between 'pin A13' and 'pin A14' on modulation pressure solenoid valve (main). 5.3 ± 0.3 ohms (at 20°C) Go to Step 14 Open circuit or short circuit in coil. Go to Step 16 13 Check mechanical functionality of modulation pressure solenoid valve (main) using Tip-tonic control module plug: Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to 'pin 31' of the Tiptronic control module plug for a short time. 'Pin 17' must be connected to ground. A distinct clicking sound should be heard immediately from the shift solenoid valve. Go to Step 17 Shift solenoid valve stiff. Go to Step 16 14 Check the mechanical functionality of the modulation pressure solenoid valve (main) directly at the valve: Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to 'pin A13' and ground to 'pin A14' of the shift solenoid valve for a short time. A distinct clicking sound should be heard immediately from the shift solenoid valve. Go to Step 17 Shift solenoid valve stiff. Go to Step 16 15 Replace wiring harness in the transmission (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter. --> End 16 Replace modulation pressure solenoid valve (main) Only replace if the wiring in the transmission was checked for chafing damage and found to be OK. --> End 17 Replace control module See note on replacing control modules! --> End
3. Troubleshooting only for fault type: 'Electrical fault in electric circuit' NOTE: If the fault '0364 Power supply, terminal 15' is also stored in addition to this fault, look for the cause of the fault on the power supply side of the 'Tiptronic control module'! TROUBLESHOOTING PROCEDURE ELECTRICAL FAULT IN ELECTRIC CIRCUIT Work instruction Display OK If not OK 1 Check battery voltage/current and charge voltage/ current on three-phase generator: Engine speed > 2,000 rpm. Measure charge voltage/ current of generator. 11.4 to 14.5 V Go to Step 2 Charge battery if necessary, replace if faulty. Wiring/regulator or diodes faulty. Repair wires or generator. After carrying out repairs, erase the fault memory and then read out the fault memory again while observing the diagnostic conditions. If no faults are stored in memory: --> End If the fault is still present: Go to Step 2 2 Check terminal 15 power supply to Tiptronic control module: Ignition off Pull plug off Tiptronic control module Ignition on Measure voltage between 'pins 27, 28' and ground on Tiptronic control module plug. 10.5 to 14.5 V Go to Step 3 Check fuse '51' in fuse carrier at right of dashboard (resistance measurement). Check power supply lines for short circuit to ground: Go to Step 4 3 Check ground supply to Tiptronic control module: Measure voltage between 'pin 1, 2 and battery positive connection'. 10.5 to 14.5 V Go to Step 4 Check ground lead for short circuit to B+: Go to Step 5 4 Check power supply lines for short circuit to ground: Ignition off Measure voltage between 'pin 27, 28 and battery positive connection' on Tiptronic control module plug. < 0.3 V Go to Step 5 Short circuit to ground in Tiptronic control module plug leads 'pin 27, 28 and fuse 51' in fuse carrier at right of dashboard. Repair wire and replace faulty fuse. --> End 5 Check ground supply lines for short circuit to B+: Ignition on Measure voltage between 'pin 1, 2 and body ground'. < 0.3 V Go to Step 6 Short circuit to B+ in Tiptronic control module plug leads and 'body ground point 26'. Repair wire(s) and replace faulty fuse. --> End 6 Check voltage supply lines for open circuit: Ignition off Measure resistance on Tip-tonic control module plug between 'pin 27, 28 and fuse 51' in fuse carrier at right of dashboard. < 0.5 ohms Go to Step 7 Open circuit in wires to fuse carrier at right of dashboard. Repair wire(s). Check fuse. --> End 7 Check ground supply lines for open circuit: Measure resistance between 'pin 1,2 and body ground' on Tiptronic control module plug. < 0.5 ohms Go to Step 8 Open circuit in Tiptronic control module and body ground wires. Repair wire(s). --> End 8 Check terminal 15 power supply at fuse: Measure voltage between fuse plug '51 and body ground' in fuse carrier at right of dashboard. 10.5 V to 14.5 V Go to Step 9 Short circuit/contact resistance/corroded or loose connections near or in fuse carrier. Repair if possible, otherwise replace fuse carrier at right of dashboard. --> End 9 Continue troubleshooting in accordance with the 'Diagnosis/troubleshooting' tables: Troubleshooting only for fault type: 'Short circuit to B+' Troubleshooting only for fault type: 'Open circuit/short circuit to ground' Follow the work instructions in the tables and look for the fault on the page that describes the activation of the modulation pressure solenoid valve (main). --> End

Multi-function switch (PRND) [Transmission Range Sensor Circuit Malfunction (PRNDL Input)]

Note. The ignition must be switched off and then switched on again in order to display an error message in the instrument cluster.

Use the 'Actual values' menu in the 9588 Porsche System Tester II to check the transmission status and the actual values of the shift solenoid valves and sensors.

1. 'Implausible signal', error message '1 *' in the table shown above
2. 'No signal/communication', error message '2*' in the table shown above

Tiptronic control module plug

1. Pin 10 'position switch B', from multi-function switch 'pin C7'
2. Pin 22 'position switch PA', from multi-function switch 'pin C5'
3. Pin 36 'position switch C', from multi-function switch 'pin C9'
4. Pin 47 'position switch A', from multi-function switch 'pin C1'

Scheme 31

Data on multi-function switch (PRND)

1. Max. current input: 15 mA (at 16.5 V)

Note. Visual inspection: In the next troubleshooting section, please check first that the affected 'pins' on the Tiptronic control module plug connection and the 'pins' on the 'existing transmission wiring' plug connection are neither damaged nor corroded. Remove any soiling or corrosion/oxidation. Replace damaged parts/wires.

Note. Control unit replacement: Before replacing the 'Tiptronic control unit', the ground connections, power supply and plug connections on the control unit must be checked as OK. Please observe the coding of the control module. After the test drive, read out the fault memory with the 9588 Porsche System Tester II again. Additional causes of faults that could damage the 'Tiptronic control module' should be detected and remedied.

DIAGNOSIS/TROUBLESHOOTING PROCEDURE

1. Voltage greater than 10.2 V and less than 15.5 V
2. Ignition on
3. Internal Tiptronic control unit function test was completed successfully
4. Engine running without malfunction, speed '> 400 rpm' The fault types 'open circuit/short circuit to B+ (CODE: P0712)' are set after the following conditions occur 12 times: NOTE: The value obtained before the fault is set is used as a substitute value!

1. Engine temperature normal
2. Tiptronic control not in limp-home mode
3. Vehicle driving time > 10 min
4. The value obtained corresponds to the minimum value '- 43°C' for more than 1 second The fault type 'short circuit to ground (CODE: P0713)' is set after the following conditions occur 30 times: NOTE: The value obtained before the fault is set is used as a substitute value!

1. The value obtained corresponds to the maximum value '200°C' for more than 10 seconds

The fault type 'implausible signal (CODE: P0711)' is set after the following conditions occur once

1. Selector lever position 'D, R'
2. ATF temperature during initialization phase < 30°C
3. ATF temperature during initialization phase = maximum ATF temperature during a 15 min period ± 5°C

Note. The 'Diagnosis/troubleshooting' shown below is adapted to suit the fault type displayed in the tester (please note fault type numbering 1,2,... etc.!). The fault memory Info key [F8] on the Porsche System Tester II No. 9588 can be used to read out the fault type in the 'extended fault memory'.

1. 1.) 'open circuit/short circuit to B+': ATF temperature sensor sticks in lower temperature range
2. 2.) 'Short circuit to ground': ATF temperature sensor sticks in upper temperature range
3. 3.) 'implausible signal': ATF temperature sensor sticks in middle temperature range

Tiptronic control unit plug

1. Pin 8 'ATF temperature sensor ground', to existing transmission wiring plug 'pin B2'
2. Pin 45 'ATF temperature sensor voltage/current', to existing transmission wiring plug 'pin B1'

Scheme 32

1 - Tiptronic control unit

2 - ATF temperature sensor

8 - Pin (8)

45 - Pin (45)

I - ATF temperature sensor current flow

Data on ATF temperature sensor

1. Sensor type: Thermistor
2. Current input at 145°C: 2 mA
3. Internal resistance at -30°C: 44 ± 6.6 kohms
4. Internal resistance at 10°C: 6.445 ± 0.645 kohms
5. Internal resistance at 110°C: 247 ± 16 ohms
6. Internal resistance at 145°C: 111 ± 6 ohms

Note. Visual inspection: In the next troubleshooting section, please check first that the affected 'pins' on the Tiptronic control unit plug connection and the 'pins' on the 'existing transmission wiring' plug connection are neither damaged nor corroded. Remove any soiling or corrosion/oxidation. Replace damaged parts/wires.

Note. Control unit replacement: Before replacing the 'Tiptronic control unit', the ground connections, power supply and plug connections on the control unit must be checked as OK. Please observe the coding of the control unit. After the test drive, read out the fault memory again with the Porsche System Tester II No. 9588. Additional causes of faults that could damage the 'Tiptronic control unit' should be detected and remedied.

1. Troubleshooting only for fault type: 'Open circuit/short circuit to B+' TROUBLESHOOTING PROCEDURE OPEN CIRCUIT/SHORT CIRCUIT TO B+ Work instruction Display OK If not OK 1 Check for short circuit to B+ with 'Tiptronic control unit' plug disconnected and sensor plug connected (existing transmission wiring): Switch off ignition Pull plug off Tiptronic control unit Switch on ignition Measure voltage between 'pins 8, 45' and ground on Tiptronic control unit plug. < 0.3 V Go to Step 2 Repair wiring harness to Tiptronic control unit (existing transmission wiring). --> End 2 Check for short circuit with both 'Tiptronic control unit' plug and sensor valve plug disconnected (existing transmission wiring): Switch off ignition Measure resistance on sensor plug (existing transmission wiring) between 'pins B1' and pins: 'B2, B3, B4, B5, B6, B7, B8'. infinity ohms Go to Step 3 Repair wiring harness to Tiptronic control unit (existing transmission wiring). --> End 3 Check for open circuit with both 'Tiptronic control unit' plug and sensor plug disconnected (existing transmission wiring): Measure resistance between 'pins 8, 45' on Tiptronic control unit plug and 'pins B1, B2' of sensor plug (existing transmission wiring). < 5 ohms Go to Step 4 Repair wiring harness to Tiptronic control unit (existing transmission wiring). --> End 4 Check wires in the transmission for open circuit: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter, perform visual inspection of plug and wiring: Sensor plug (existing transmission wiring) connected Pull plug off ATF temperature sensor in the transmission Measure resistance between 'pins 8, 45' on Tiptronic control unit plug and 'pins B1, B2' on ATF temperature sensor plug. < 5 ohms Go to Step 5 Replace wiring harness in the transmission. --> End 5 Replace ATF temperature sensor Only replace if the wiring in the transmission was checked for chafing damage and found to be OK. --> End If fault has not been remedied, then: Go to Step 6 6 Replace Tiptronic control unit See note on replacing control units! --> End
2. Troubleshooting only for fault type: 'Short circuit to ground' TROUBLESHOOTING PROCEDURE SHORT CIRCUIT TO GROUND Work instruction Display OK If not OK 1 Check for short circuit to ground with 'Tiptronic control unit' plug disconnected and sensor plug connected (existing transmission wiring): Switch off ignition Pull plug off Tiptronic control unit Measure resistance between 'pin 45' and ground on Tiptronic control unit plug. infinity ohms Go to Step 5 Go to Step 2 2 Check for short circuit to ground with 'Tiptronic control unit' plug disconnected and sensor plug connected (existing transmission wiring): Pull off sensor plug (existing transmission wiring) Measure resistance between 'pin 45' and ground on Tiptronic control unit plug. infinity ohms Go to Step 3 Repair wiring harness to Tiptronic control unit (existing transmission wiring). --> End 3 Check for short circuit with both 'Tiptronic control unit' plug and sensor valve plug disconnected (existing transmission wiring): Measure resistance on sensor plug (existing transmission wiring) between 'pins B1' and pins: 'B2, B3, B4, B5, B6, B7, B8'. infinity ohms Go to Step 4 Repair wiring harness to Tiptronic control unit (existing transmission wiring). --> End 4 Check wire in the transmission for short circuit to ground: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter, perform visual inspection of plug and wiring: Pull plug off ATF temperature sensor. Measure resistance between disconnected plug (wiring side) 'B1' and ground (transmission housing). infinity ohms Go to Step 5 Replace wiring harness in the transmission. --> End 5 Replace ATF temperature sensor Only replace if the wiring in the transmission was checked for chafing damage and found to be OK. --> End If fault has not been remedied, then: Go to Step 6 6 Replace Tiptronic control unit See note on replacing control units! --> End
3. Troubleshooting only for fault type: 'implausible signal' TROUBLESHOOTING PROCEDURE IMPLAUSIBLE SIGNAL Work instruction Display OK If not OK 1 Replace 'ATF temperature sensor' If, after replacing the 'ATF temperature sensor', the fault is not remedied, then: --> End If, after replacing the 'ATF temperature sensor', the fault is remedied, then: Go to Step 2 2 Replace Tiptronic control unit See note on replacing control units! --> End

Shift solenoid valve C2 (modulation pressure) [Pressure Control Solenoid 'C Electrical]

Note. The ignition must be switched off and then switched on again in order to display an error message in the instrument cluster.

System in limp-home mode 1: Fault not caused by incorrect gear ratio or unusual switching!

Note. Please refer to ' LIMP-HOME MODE 1 ' table in the main chapter entitled 'Control module function (coding/programming)'!

Use the 'Actual values' menu in the Porsche System Tester II No. 9588 to check the transmission status and the actual values of the shift solenoid valves and sensors.

Note. The 'Diagnosis/troubleshooting' shown below is adapted to suit the fault type displayed in the tester (please note fault type numbering 1,2,... etc.!). The fault memory Info key [F8] on the Porsche System Tester II No. 9588 can be used to read out the fault type in the 'extended fault memory'.

1. 1.) 'Short circuit to B+': A short circuit to B+ causes the shift solenoid valve C2 (modulation pressure) to be continually activated
2. 2.) 'Open circuit/short circuit to ground': A short circuit to ground prevents activation of the shift solenoid valve C2 (modulation pressure)
3. 2.) 'Open circuit/short circuit to ground': An open circuit prevents activation of the shift solenoid valve C2 (modulation pressure)
4. 3.) 'Electrical fault in electric circuit': Shift solenoid valve C2 (modulation pressure) has no or limited function

Tiptronic control module plug

1. Pin 1 'ground', from ground pin MB26
2. Pin 2 'ground', from ground pin MB26
3. Pin 16 'voltage/current for shift solenoid valve C2 (modulation pressure)', to existing transmission wiring plug 'pin A5'
4. Pin 27 'terminal 15', from fuse carrier at right of dashboard 'fuse 51'
5. Pin 28 'terminal 15', from fuse carrier at right of dashboard 'fuse 51'
6. Pin 32 'ground for shift solenoid valve C2 (modulation pressure)', to existing transmission wiring plug 'pin A6'

Data on shift solenoid valve C2 (modulation pressure)

1. Max. voltage drop on Tiptronic control module: 1.5 V
2. Operating voltage (during switching): 10.5 V to 16.5 V
3. Max. voltage drop in wiring: 0.08 V
4. Max. power consumption: 1.0 A
5. Default internal resistance: 5.3 ± 0.3 ohms. (at 20°C)

Note. Visual inspection: In the next troubleshooting section, please check first that the affected 'pins' on the Tiptronic control module plug connection and the 'pins' on the 'existing transmission wiring' plug connection are neither damaged nor corroded. Remove any soiling or corrosion/oxidation. Replace damaged parts/wires.

Note. Replacing control module: Before replacing the 'Tiptronic control module', the ground connections, power supply and plug connections on the control module must be checked. Please observe the coding of the control module. After the test drive, read out the fault memory again with the Porsche System Tester II No. 9588. Additional causes of faults that could damage the 'Tiptronic control module' should be detected and remedied.

1. Troubleshooting only for fault type: 'Short circuit to B+' TROUBLESHOOTING PROCEDURE SHORT CIRCUIT TO B+ Work instruction Display OK If not OK 1 Check for short circuit to B+ with 'Tiptronic control module' plug disconnected and solenoid valve plug connected (existing transmission wiring): Ignition off Pull plug off Tiptronic control module Ignition on Measure voltage between 'pins 16, 32' and ground on Tiptronic control module plug. < 0.3 V Go to Step 2 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 2 Check for short circuit with 'Tiptronic control module' plug disconnected and solenoid valve plug connected (existing transmission wiring): Ignition off Measure resistance between 'pins 16, 32' and pins' 4, 5, 15, 30, 31,41, 42' on Tiptronic control module plug. infinity ohms Go to Step 4 Go to Step 3 3 Check for short circuit with both 'Tiptronic control module' plug and solenoid valve plug disconnected (existing transmission wiring): Measure resistance between 'pins 16, 32' and pins' 4, 5, 15, 30, 31,41, 42' on Tiptronic control module plug. infinity ohms Go to Step 6 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 4 Check mechanical functionality of shift solenoid valve C2 (modulation pressure) using Tiptronic control module plug: Tiptronic control module plug disconnected and solenoid valve plug (existing transmission wiring) connected Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to 'pin 16' of the Tiptronic control module plug for a short time. 'Pin 32' must be connected to ground. A distinct clicking sound should be heard immediately from the shift solenoid valve. Go to Step 8 Go to Step 5 5 Check the mechanical functionality of the shift solenoid valve C2 (modulation pressure) directly at the valve: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter, perform visual inspection of plug and wiring: Pull plug off the shift solenoid valve C2 (modulation pressure). Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to 'pin A5' and ground to 'pin A6' of the shift solenoid valve for a short time. A distinct clicking sound should be heard immediately from the shift solenoid valve. Go to Step 8 Shift solenoid valve stiff. Go to Step 7 6 Replace wiring harness in the transmission (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter. --> End 7 Replace shift solenoid valve C2 (modulation pressure) Only replace if the wiring in the transmission was checked for chafing damage and found to be OK. --> End 8 Replace control module See note on replacing control modules! --> End
2. Troubleshooting only for fault type: 'Open circuit/short circuit to ground' TROUBLESHOOTING PROCEDURE OPEN CIRCUIT/SHORT CIRCUIT TO GROUND Work instruction Display OK If not OK 1 Check the 'shift solenoid valve C2 (modulation pressure)' activation wire and the ground supply wire for a short circuit with respect to each other and an open circuit: Ignition off Pull plug off 'Tiptronic control module' Measure resistance between 'pin 16' and 'pin 32' on Tiptronic control module plug. 5.3 ± 0.3 ohms Go to Step 4 If the measured resistance is less than the default value: Go to Step 2 If the measured resistance is infinity ohms: Go to Step 10 2 Check the shift solenoid valve C2 (modulation pressure) activation wire and the ground supply wire for a short circuit with respect to each other: Pull off solenoid valve plug (existing transmission wiring) Measure resistance between 'pin 16' and 'pin 32' on Tiptronic control module plug. infinity ohms Go to Step 3 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 3 Check the shift solenoid valve C2 (modulation pressure) activation wire and the ground supply wire in the transmission for a short circuit with respect to each other: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter, perform visual inspection of plug and wiring: Pull plug off the shift solenoid valve C2 (modulation pressure). Measure resistance between 'pin A6' and 'pin A5' on the disconnected plug. infinity ohms Go to Step 12 Go to Step 15 4 Check the shift solenoid valve C2 (modulation pressure) activation wire and the ground supply wires of the shift solenoid valves for a short circuit with respect to each other: Measure resistance between 'pin 16' and pins '6, 17, 18, 43, 44' on Tiptronic control module plug. infinity ohms Go to Step 6 Go to Step 5 5 Check the shift solenoid valve C2 (modulation pressure) activation wire and the ground supply wires of the shift solenoid valves for a short circuit with respect to each other: Pull off solenoid valve plug (existing transmission wiring) Measure resistance between 'pin 16' and pins '6, 17, 18, 43, 44' on Tiptronic control module plug. infinity ohms Go to Step 15 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 6 Check for short circuit to ground in the shift solenoid valve C2 (modulation pressure) activation wire: Measure resistance between 'pin 16' and ground on Tiptronic control module plug. infinity ohms Go to Step 13 Go to Step 7 7 Check for short circuit to ground in the shift solenoid valve C2 (modulation pressure) activation wire: Pull off solenoid valve plug (existing transmission wiring) Measure resistance between 'pin 16' and ground on Tiptronic control module plug. infinity ohms Go to Step 8 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 8 Check for short circuit to ground in the shift solenoid valve C2 (modulation pressure) activation wire in the transmission: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter, perform visual inspection of plug and wiring: Pull plug off the shift solenoid valve C2 (modulation pressure). Measure resistance between 'pin A5' on disconnected plug (wiring side) and ground (transmission housing). infinity ohms Go to Step 9 Go to Step 15 9 Check for short circuit to ground in the coil in the shift solenoid valve C2 (modulation pressure): Measure resistance between 'pin A5' on shift solenoid valve C2 (modulation pressure) and ground (transmission housing). infinity ohms Go to Step 14 Short circuit to ground in coil. Go to Step 16 10 Check for open circuit in the shift solenoid valve C2 (modulation pressure) activation wire and ground supply wire: Pull off solenoid valve plug (existing transmission wiring) Measure resistance in the wires between 'pin 32,16' of Tiptronic control module plug and 'pin A6, A5' of shift solenoid valve C2 (modulation pressure) plug. < 2 ohms Go to Step 11 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 11 Check for open circuit in the activation wire and ground supply wire of the shift solenoid valve C2 (modulation pressure) in the transmission: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter, perform visual inspection of plug and wiring: Connect solenoid valve plug (existing transmission wiring) Pull plug off the shift solenoid valve C2 (modulation pressure). Measure resistance between 'pin 32, 16' of Tiptronic control module plug and 'pin A6, A5' of shift solenoid valve C2 (modulation pressure) plug. < 2 ohms Go to Step 12 Go to Step 15 12 Check shift solenoid valve C2 (modulation pressure) coil for open circuit and short circuit: Measure resistance between 'pin A5' and 'pin A6' on shift solenoid valve C2 (modulation pressure). 5.3 ± 0.3 ohms (at 20°C) Go to Step 14 Open circuit or short circuit in coil. Go to Step 16 13 Check mechanical functionality of shift solenoid valve C2 (modulation pressure) using Tiptronic control module plug: Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to 'pin 16' of the Tiptronic control module plug for a short time. 'Pin 32' must be connected to ground. A distinct clicking sound should be heard immediately from the shift solenoid valve. Go to Step 17 Shift solenoid valve stiff. Go to Step 16 14 Check the mechanical functionality of the shift solenoid valve C2 (modulation pressure) directly at the valve: Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to 'pin A5' and ground to 'pin A6' of the shift solenoid valve for a short time. A distinct clicking sound should be heard immediately from the shift solenoid valve. Go to Step 17 Shift solenoid valve stiff. Go to Step 16 15 Replace wiring harness in the transmission (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter. --> End 16 Replace shift solenoid valve C2 (modulation pressure) Only replace if the wiring in the transmission was checked for chafing damage and found to be OK. --> End 17 Replace control module See note on replacing control modules! --> End
3. Troubleshooting only for fault type: 'Electrical fault in electric circuit' NOTE: If the fault '0364 Power supply, terminal 15' is also stored in addition to this fault, look for the cause of the fault on the power supply side of the 'Tiptronic control module'! TROUBLESHOOTING PROCEDURE ELECTRICAL FAULT IN ELECTRIC CIRCUIT Work instruction Display OK If not OK 1 Check battery voltage/current and charge voltage/ current on three-phase generator: Engine speed > 2,000 rpm. Measure charge voltage/ current of generator. 11.4 to 14.5 V Go to Step 2 Charge battery if necessary, replace if faulty. Wiring/regulator or diodes faulty. Repair wires or generator. After carrying out repairs, erase the fault memory and then read out the fault memory again while observing the diagnostic conditions. If no faults are stored in memory: --> End If the fault is still present: Go to Step 2 2 Check terminal 15 power supply to Tiptronic control module: Ignition off Pull plug off Tiptronic control module Ignition on Measure voltage between 'pins 27, 28' and ground on Tiptronic control module plug. 10.5 to 14.5 V Go to Step 3 Check fuse '51' in fuse carrier at right of dashboard (resistance measurement). Check power supply lines for short circuit to ground: Go to Step 4 3 Check ground supply to Tiptronic control module: Measure voltage between 'pin 1, 2 and battery positive connection'. 10.5 to 14.5 V Go to Step 4 Check ground lead for short circuit to B+: Go to Step 5 4 Check power supply lines for short circuit to ground: Ignition off Measure voltage between 'pin 27, 28 and battery positive connection' on Tiptronic control module plug. < 0.3 V Go to Step 5 Short circuit to ground in Tiptronic control module plug leads' pin 27, 28 and fuse 51' in fuse carrier at right of dashboard. Repair wire and replace faulty fuse. --> End 5 Check ground supply lines for short circuit to B+: Ignition on Measure voltage between 'pin 1, 2 and body ground'. < 0.3 V Go to Step 6 Short circuit to B+ in Tiptronic control module plug leads and 'body ground point 26'. Repair wire(s) and replace faulty fuse. --> End 6 Check voltage supply lines for open circuit: Ignition off Measure resistance on Tiptronic control module plug between 'pin 27, 28 and fuse 51' in fuse carrier at right of dashboard. < 0.5 ohms Go to Step 7 Open circuit in wires to fuse carrier at right of dashboard. Repair wire(s). Check fuse. --> End 7 Check ground supply lines for open circuit: Measure resistance between 'pin 1,2 and body ground' on Tiptronic control module plug. < 0.5 ohms Go to Step 8 Open circuit in Tiptronic control module and body ground wires. Repair wire(s). --> End 8 Check terminal 15 power supply at fuse: Measure voltage between fuse plug '51 and body ground' in fuse carrier at right of dashboard. 10.5 V to 14.5 V Go to Step 9 Short circuit/contact resistance/corroded or loose connections near or in fuse carrier. Repair if possible, otherwise replace fuse carrier at right of dashboard. --> End 9 Continue troubleshooting in accordance with the 'Diagnosis/troubleshooting' tables: Troubleshooting only for fault type: 'Short circuit to B+" Troubleshooting only for fault type: 'Open circuit/short circuit to ground' Follow the work instructions in the tables and look for the fault on the page that describes the activation of the shift solenoid valve C2 (modulation pressure). --> End

Shift solenoid valve B1 (modulation pressure) [Pressure Control Solenoid 'F' Electrical]

Note. The ignition must be switched off and then switched on again in order to display an error message in the instrument cluster.

System in limp-home mode 1: Fault not caused by incorrect gear ratio or unusual switching!

Note. Please refer to ' LIMP-HOME MODE 1 ' table in the main chapter entitled 'Control module function (coding/programming)'! Use the 'Actual values' menu in the Porsche System Tester II No. 9588 to check the transmission status and the actual values of the shift solenoid valves and sensors.

Note. The 'Diagnosis/troubleshooting' shown below is adapted to suit the fault type displayed in the tester (please note fault type numbering 1,2,... etc.!). The fault memory Info key [F8] on the Porsche System Tester II No. 9588 can be used to read out the fault type in the 'extended fault memory'.

1. 1.) 'Short circuit to B+': A short circuit to B+ causes the shift solenoid valve B1 (modulation pressure) to be continually activated
2. 2.) 'Open circuit/short circuit to ground': A short circuit to ground prevents activation of the shift solenoid valve B1 (modulation pressure)
3. 2.) 'Open circuit/short circuit to ground': An open circuit prevents activation of the shift solenoid valve B1 (modulation pressure)
4. 3.) 'Electrical fault in electric circuit': Shift solenoid valve B1 (modulation pressure) has no or limited function

Tiptronic control module plug

1. Pin 1 'ground', from ground pin MB26
2. Pin 2 'ground', from ground pin MB26
3. Pin 4 'voltage/current for shift solenoid valve B1 (modulation pressure)', to existing transmission wiring plug 'pin A9'
4. Pin 27 'terminal 15', from fuse carrier at right of dashboard 'fuse 51'
5. Pin 28 'terminal 15', from fuse carrier at right of dashboard 'fuse 51'
6. Pin 44 'ground for shift solenoid valve B1 (modulation pressure)', to existing transmission wiring plug 'pin A10'

Data on shift solenoid valve B1 (modulation pressure)

1. Max. voltage drop on Tiptronic control module: 1.5 V
2. Operating voltage (during switching): 10.5 V to 16.5 V
3. Max. voltage drop in wiring: 0.08 V
4. Max. power consumption: 1.0 A
5. Default internal resistance: 5.3 ± 0.3 ohms (at 20°C)

Note. Visual inspection: In the next troubleshooting section, please check first that the affected 'pins' on the Tiptronic control module plug connection and the 'pins' on the 'existing transmission wiring' plug connection are neither damaged nor corroded. Remove any soiling or corrosion/oxidation. Replace damaged parts/wires.

Note. Replacing control module: Before replacing the 'Tiptronic control module', the ground connections, power supply and plug connections on the control module must be checked. Please observe the coding of the control module. After the test drive, read out the fault memory again with the Porsche System Tester II No. 9588. Additional causes of faults that could damage the 'Tiptronic control module' should be detected and remedied.

1. Troubleshooting only for fault type: 'Short circuit to B+' TROUBLESHOOTING PROCEDURE SHORT CIRCUIT TO B+ Work instruction Display OK If not OK 1 Check for short circuit to B+ with 'Tiptronic control module' plug disconnected and solenoid valve plug connected (existing transmission wiring): Ignition off Pull plug off Tiptronic control module Ignition on Measure voltage between 'pins 4, 44' and ground on Tiptronic control module plug. < 0.3 V Go to Step 2 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 2 Check for short circuit with 'Tiptronic control module' plug disconnected and solenoid valve plug connected (existing transmission wiring): Ignition off Measure resistance between 'pins 4, 44' and pins '5, 15, 16, 30, 31, 41,42' on Tiptronic control module plug. infinity ohms Go to Step 4 Go to Step 3 3 Check for short circuit with both 'Tiptronic control module' plug and solenoid valve plug disconnected (existing transmission wiring): Measure resistance between 'pins 4, 44' and pins '5, 15, 16,30,31, 41,42' on Tiptronic control module plug. infinity ohms Go to Step 6 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 4 Check mechanical functionality of shift solenoid valve B1 (modulation pressure) using Tiptronic control module plug: Tiptronic control module plug disconnected and solenoid valve plug (existing transmission wiring) connected Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to 'pin 4' of the Tiptronic control module plug for a short time. 'Pin 44' must be connected to ground. A distinct clicking sound should be heard immediately from the shift solenoid valve. Go to Step 8 Go to Step 5 5 Check the mechanical functionality of the shift solenoid valve B1 (modulation pressure) directly at the valve: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter, perform visual inspection of plug and wiring: Pull plug off the shift solenoid valve B1 (modulation pressure). Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to 'pin A9' and ground to 'pin A10' of the shift solenoid valve for a short time. A distinct clicking sound should be heard immediately from the shift solenoid valve. Go to Step 8 Shift solenoid valve stiff. Go to Step 7 6 Replace wiring harness in the transmission (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter. --> End 7 Replace shift solenoid valve B1 (modulation pressure) Only replace if the wiring in the transmission was checked for chafing damage and found to be OK. --> End 8 Replace control module See note on replacing control modules! --> End
2. Troubleshooting only for fault type: 'Open circuit/short circuit to ground' TROUBLESHOOTING PROCEDURE OPEN CIRCUIT/SHORT CIRCUIT TO GROUND Work instruction Display OK If not OK 1 Check the 'shift solenoid valve B1 (modulation pressure)' activation wire and the ground supply wire for a short circuit with respect to each other and an open circuit: Ignition off Pull plug off 'Tiptronic control module' Measure resistance between 'pin 4' and 'pin 44' on Tiptronic control module plug. 5.3 ± 0.3 ohms Go to Step 4 If the measured resistance is less than the default value: Go to Step 2 If the measured resistance is infinity ohms: Go to Step 10 2 Check the shift solenoid valve B1 (modulation pressure) activation wire and the ground supply wire for a short circuit with respect to each other: Pull off solenoid valve plug (existing transmission wiring) Measure resistance between 'pin 4' and 'pin 44' on Tiptronic control module plug. infinity ohms Go to Step 3 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 3 Check the shift solenoid valve B1 (modulation pressure) activation wire and the ground supply wire in the transmission for a short circuit with respect to each other: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter, perform visual inspection of plug and wiring: Pull plug off the shift solenoid valve B1 (modulation pressure). Measure resistance between 'pin A10' and 'pin A9' on the disconnected plug. infinity ohms Go to Step 12 Go to Step 15 4 Check the shift solenoid valve B1 (modulation pressure) activation wire and the ground supply wires of the shift solenoid valves for a short circuit with respect to each other: Measure resistance between 'pin 4' and pins '6, 17, 18, 32, 43' on Tiptronic control module plug. infinity ohms Go to Step 6 Go to Step 5 5 Check the shift solenoid valve B1 (modulation pressure) activation wire and the ground supply wires of the shift solenoid valves for a short circuit with respect to each other: Pull off solenoid valve plug (existing transmission wiring) Measure resistance between 'pin 4' and pins '6, 17, 18, 32, 43' on Tiptronic control module plug. infinity ohms Go to Step 15 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 6 Check for short circuit to ground in the shift solenoid valve B1 (modulation pressure) activation wire: Measure resistance between 'pin 4' and ground on Tiptronic control module plug. infinity ohms Go to Step 13 Go to Step 7 7 Check for short circuit to ground in the shift solenoid valve B1 (modulation pressure) activation wire: Pull off solenoid valve plug (existing transmission wiring) Measure resistance between 'pin 4' and ground on Tiptronic control module plug. infinity ohms Go to Step 8 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 8 Check for short circuit to ground in the shift solenoid valve B1 (modulation pressure) activation wire in the transmission: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter, perform visual inspection of plug and wiring: Pull plug off the shift solenoid valve B1 (modulation pressure). Measure resistance between 'pin A9' on disconnected plug (wiring side) and ground (transmission housing). infinity ohms Go to Step 9 Go to Step 15 9 Check for short circuit to ground in the coil in the shift solenoid valve B1 (modulation pressure): Measure resistance between 'pin A9' on shift solenoid valve B1 (modulation pressure) and ground (transmission housing). infinity ohms Go to Step 14 Short circuit to ground in coil. Go to Step 16 10 Check for open circuit in the shift solenoid valve B1 (modulation pressure) activation wire and ground supply wire: Pull off solenoid valve plug (existing transmission wiring) Measure resistance in the wires between 'pin 44, 4' of Tiptronic control module plug and 'pin A10, A9' of shift solenoid valve B1 (modulation pressure) plug. < 2 ohms Go to Step 11 Repair wiring harness to Tiptronic control module (existing transmission wiring). --> End 11 Check for open circuit in the activation wire and ground supply wire of the shift solenoid valve B1 (modulation pressure) in the transmission: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter, perform visual inspection of plug and wiring: Connect solenoid valve plug (existing transmission wiring) Pull plug off the shift solenoid valve B1 (modulation pressure). Measure resistance between 'pin 44, 4' of Tiptronic control module plug and 'pin A10, A9' of shift solenoid valve B1 (modulation pressure) plug. < 2 ohms Go to Step 12 Go to Step 15 12 Check shift solenoid valve B1 (modulation pressure) coil for open circuit and short circuit: Measure resistance between 'pin A9' and 'pin A10' on shift solenoid valve B1 (modulation pressure). 5.3 ± 0.3 ohms (at 20°C) Go to Step 14 Open circuit or short circuit in coil. Go to Step 16 13 Check mechanical functionality of shift solenoid valve B1 (modulation pressure) using Tiptronic control module plug: Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to 'pin 4' of the Tiptronic control module plug for a short time. 'Pin 44' must be connected to ground. A distinct clicking sound should be heard immediately from the shift solenoid valve. Go to Step 17 Shift solenoid valve stiff. Go to Step 16 14 Check the mechanical functionality of the shift solenoid valve B1 (modulation pressure) directly at the valve: Using a suitable auxiliary cable that is fuse-protected in accordance with the power consumption of the shift solenoid valve, supply 'approx. 12 V battery voltage' to 'pin A9' and ground to 'pin A10' of the shift solenoid valve for a short time. A distinct clicking sound should be heard immediately from the shift solenoid valve. Go to Step 17 Shift solenoid valve stiff. Go to Step 16 15 Replace wiring harness in the transmission (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter. --> End 16 Replace shift solenoid valve B1 (modulation pressure) Only replace if the wiring in the transmission was checked for chafing damage and found to be OK. --> End 17 Replace control module See note on replacing control modules! --> End
3. Troubleshooting only for fault type: 'Electrical fault in electric circuit'

Note. If the fault '0364 Power supply, terminal 15' is also stored in addition to this fault, look for the cause of the fault on the power supply side of the 'Tiptronic control module'!

TROUBLESHOOTING PROCEDURE ELECTRICAL FAULT IN ELECTRIC CIRCUIT

Terminal 15 power supply

Note. The ignition must be switched off and then switched on again in order to display an error message in the instrument cluster.

Note. First check the fuse. This fault can also indicate a faulty fuse! Fuse carrier at right of dashboard, fuse 51.

System in limp-home mode 1: Fault not caused by incorrect gear ratio or unusual switching!

Note. Please refer to ' LIMP-HOME MODE 1 ' table in the main chapter entitled 'Control module function (coding/programming)'!

Use the 'Actual values' menu in the Porsche System Tester II No. 9588 to check the transmission status and the actual values of the shift solenoid valves and sensors.

1. 'Lower limit value not reached', fuse faulty
2. 'Lower limit value not reached', generator faulty
3. 'Lower limit value not reached', short circuit to B+ in ground leads
4. 'Lower limit value not reached', short circuit to ground in voltage wires
5. 'Lower limit value not reached', open circuit in fuse box or in voltage or ground leads
6. 'Lower limit value not reached', Tiptronic control module

Tiptronic control module plug

1. Pin 1 'ground', from ground pin MB26
2. Pin 2 'ground', from ground pin MB26
3. Pin 27 'terminal 15', from fuse carrier at right of dashboard 'fuse 51'
4. Pin 28 'terminal 15', from fuse carrier at right of dashboard 'fuse 51'

Function restricted due to excess temperature

This fault is set if the ATF fluid in the torque converter is greater than or equal to 150°C.

Note. The ignition must be switched off and then switched on again in order to display an error message in the instrument cluster.

Use the 'Actual values' menu in the Porsche System Tester II No. 9588 to check the transmission status and the actual values of the shift solenoid valves and sensors.

1. 'No display' in instrument cluster (coolant shutoff valve faulty/ does not function)

Tiptronic control module plug

1. Pin '-'

Engine speed [Engine Speed Input Circuit]

Note. The ignition must be switched off and then switched on again in order to display an error message in the instrument cluster.

1. Signal from DME control module does not correspond to expected signal (please read out fault memory)
2. Signal from DME control module does not appear on CAN drive (no signal/communication)

Tiptronic control module plug

1. Pin 34 'CAN drive (low)'
2. Pin 46 'CAN drive (high)'

Fault code 0641

This fault is set when the ATF fluid in the torque converter reaches or exceeds 170°C. The Tiptronic control unit sends a signal to limit the torque to 150 Nm.

ATF temperature

Note. The ignition must be switched off and then switched on again in order to display a fault indication in the instrument cluster.

Use the 'Actual values' menu in the Porsche System Tester II No. 9588 to check the transmission status and the actual values of the shift solenoid valves and sensors.

1. 'Above upper limit', fault displayed in instrument cluster. Coolant shut-off valve faulty or does not switch. Cooler blocked, torque converter or transmission mechanical fault. Tiptronic control unit faulty.

Tiptronic control unit plug

1. Pin 8 'ATF temperature sensor ground', to existing transmission wiring plug 'pin B2'
2. Pin 45 'ATF temperature sensor voltage/current', to existing transmission wiring plug 'pin B1'

Scheme 33

1 - Tiptronic control unit

2 - ATF temperature sensor

8 - Pin (8)

45 - Pin (45)

I - ATF temperature sensor current flow

1. Sensor type: Thermistor
2. Current input at 145°C: 2 mA
3. Internal resistance at -30°C: 44 ± 6.6 kohms
4. Internal resistance at 10°C: 6,445 ± 0.645 kohms
5. Internal resistance at 110°C: 247 ± 16 ohms
6. Internal resistance at 145°C: 111 ± 6 ohms

Note. Visual inspection: In the next troubleshooting section, please check first that the affected 'pins' on the Tiptronic control unit plug connection and the 'pins' on the 'existing transmission wiring' plug connection are neither damaged nor corroded. Remove any soiling or corrosion/oxidation. Replace damaged parts/wires.

Note. Control unit replacement: Before replacing the 'Tiptronic control unit', the ground connections, power supply and plug connections on the control unit must be checked as OK. Please observe the coding of the control unit. After the test drive, read out the fault memory again with the Porsche System Tester II No. 9588. Additional causes of faults that could damage the 'Tiptronic control unit' should be detected and remedied.

DIAGNOSIS/TROUBLESHOOTING PROCEDURE

Accelerator module [Throttle/Pedal Position Sensor/Switch "D" Circuit Low Input]

Note. The ignition must be switched off and then switched on again in order to display an error message in the instrument cluster.

1. Signal from DME control module does not correspond to expected signal (please read out fault memory)
2. Signal from DME control module does not appear on CAN drive (no signal/communication)

Tiptronic control module plug

1. Pin 34 'CAN drive (low)'
2. Pin 46 'CAN drive (high)'

Reversing light switch

Note. The ignition must be switched off and then switched on again in order to display an error message in the instrument cluster.

Use the 'Actual values' menu in the 9588 Porsche System Tester 11 to check the transmission status and the actual values of the shift solenoid valves and sensors.

Note. The 'Diagnosis/troubleshooting' shown below is adapted to suit the fault type displayed in the tester (please note fault type numbering 1,2,... etc.!). The fault memory Info key [F8] on the 9588 Porsche System Tester II can be used to read out the fault type in the 'extended fault memory'.

1. 1.) 'Open circuit/short circuit to ground'
2. 2.) 'Short circuit to B+'

Tiptronic control module plug

1. Pin 21 'reversing light input', from vehicle electrical system control unit 'pin A20' (see «PLUG 'A', 26-PIN»(ref-286042-S26544880482008052900000) )

Selector lever switch

Note. The ignition must be switched off and then switched on again in order to display a fault indication in the instrument cluster.

Use the 'Actual values' menu in the Porsche System Tester II No. 9588 to check the transmission status and the actual values of the shift solenoid valves and sensors.

1. 'implausible signal'

Tiptronic control unit plug

1. Pin 11 'Tiptronic UP', from selector lever switch 'pin B4'
2. Pin 37 'Tiptronic DOWN', from selector lever switch 'pin B5'
3. Pin 48 'Tiptronic INFO', to selector lever switch 'pin B3'

Scheme 34

Note. Visual inspection: In the next troubleshooting section, please check first that the affected 'pins' on the Tiptronic control unit plug connection and the 'pins' on the 'existing transmission wiring' plug connection are neither damaged nor corroded. Remove any soiling or corrosion/oxidation. Replace damaged parts/wires.

Note. Control unit replacement: Before replacing the 'Tiptronic control unit', the ground connections, power supply and plug connections on the control unit must be checked as OK. Please observe the coding of the control unit. After the test drive, read out the fault memory again with the Porsche System Tester II No. 9588. Additional causes of faults that could damage the 'Tiptronic control unit' should be detected and remedied.

DIAGNOSIS/TROUBLESHOOTING PROCEDURE

1. Signal from DME control module does not correspond to expected signal (please read out fault memory)
2. Signal from DME control module does not appear on CAN drive (no signal/communication)

Tiptronic control module plug

1. Pin 34 'CAN drive (low)'
2. Pin 46 'CAN drive (high)'

1. 'Mechanical fault', torque converter lockup clutch does not function

Tiptronic control module plug

1. Pin '-'

Shiftlock solenoid

Note. The ignition must be switched off and then switched on again in order to display an error message in the instrument cluster.

Use the 'Actual values' menu in the 9588 Porsche System Tester II to check the transmission status and the actual values of the shift solenoid valves and sensors.

Checking shiftlock function

Shiftlock prevents the selector lever shifting out of the positions 'P' and 'N' when the foot brake is not actuated. Shiftlock is enabled when switching on the ignition.

Note. The 'Diagnosis/troubleshooting' shown below is adapted to suit the fault type displayed in the tester (please note fault type numbering 1,2,... etc.!). The fault memory Info key [F8] on the 9588 Porsche System Tester II can be used to read out the fault type in the 'extended fault memory'.

1. 1.) 'Open circuit/short circuit to B+': In the event of short circuit to B+, shiftlock solenoid permanently activated
2. 1.) 'Open circuit/short circuit to B+': In the event of open circuit, shiftlock solenoid not activated
3. 2.) 'Short circuit to ground': In the event of short circuit to ground, shiftlock solenoid not activated

Tiptronic control module plug

1. Pin 29 'shiftlock solenoid', to selector lever switch 'pin A5'
2. Pin 49 'stop light switch'

Communication problem with all control modules via CAN drive.

1. CAN drive is faulty
2. No signal/communication

Tiptronic control module plug

1. Pin 34 'CAN drive (low)'
2. Pin 46 'CAN drive (high)'

Note. The Tiptronic control unit is coded in the DME control unit!

DME control unit was replaced and coded incorrectly or was not coded (no or incorrect basic setting/adaptation)

1. Engine type coded incorrectly (no or incorrect basic setting/adaptation)
2. Transmission type coded incorrectly (no or incorrect basic setting/adaptation)
3. To localize the fault, read out the fault memory for the 'DME control unit' (Please read out fault memory)
4. No message from DME control unit on CAN drive (no signal/communication)

Tiptronic control unit plug

1. Pin 34 'CAN drive (low)'
2. Pin 46 'CAN drive (high)'

1. To locales the fault, read out the fault memory for the 'PSM control module' (Please read out fault memory)
2. No message from PSM control module on CAN drive (no signal/communication)

Tiptronic control module plug

1. Pin 34 'CAN drive (low)'
2. Pin 46 'CAN drive (high)'

1. Signal from PSM control module does not correspond to expected signal (please read out fault memory)
2. Signal from PSM control module does not correspond to expected signal (short circuit to ground)

Tiptronic control module plug

1. Pin 34 'CAN drive (low)'
2. Pin 46 'CAN drive (high)'

1. Signal from PSM control module does not correspond to expected signal (please read out fault memory)
2. Signal from PSM control module does not correspond to expected signal (implausible signal)

Tiptronic control module plug

1. Pin 34 'CAN drive (low)'
2. Pin 46 'CAN drive (high)'

1. Signal from PSM control module does not correspond to expected signal (please read out fault memory)
2. Signal from PSM control module does not correspond to expected signal (implausible signal)

Tiptronic control module plug

1. Pin 34 'CAN drive (low)'
2. Pin 46 'CAN drive (high)'

1. Signal from PSM control module does not correspond to expected signal (please read out fault memory)
2. Signal from PSM control module does not correspond to expected signal (implausible signal)

Tiptronic control module plug

1. Pin 34 'CAN drive (low)'
2. Pin 46 'CAN drive (high)'

1. Signal from PSM control module does not correspond to expected signal (please read out fault memory)
2. Signal from PSM control module does not correspond to expected signal (implausible signal)

Tiptronic control module plug

1. Pin 34 'CAN drive (low)'
2. Pin 46 'CAN drive (high)'

1. Signal from PSM control module does not correspond to expected signal (please read out fault memory)
2. Signal from PSM control module does not correspond to expected signal (implausible signal)

Tiptronic control module plug

1. Pin 34 'CAN drive (low)'
2. Pin 46 'CAN drive (high)'

1. To locales the fault, read out the fault memory for the 'transfer box control module' (Please read out fault memory)
2. The signal received from the Tiptronic control module via the CAN drive does not correspond to the expected signal (implausible signal)
3. No message from transfer box control module on CAN drive (no signal/communication)

Tiptronic control module plug

1. Pin 34 'CAN drive (low)'
2. Pin 46 'CAN drive (high)'

Rocker switch (steering column switch)

Note. The ignition must be switched off and then switched on again in order to display a fault indication in the instrument cluster.

Use the 'Actual values' menu in the Porsche System Tester II No. 9588 to check the transmission status and the actual values of the shift solenoid valves and sensors.

1. 'implausible signal'

Tiptronic control unit plug

1. Pin 34 'CAN drive (low)'
2. Pin 46 'CAN drive (high)'

1. Signal from transfer box control unit does not correspond to expected signal (please read out fault memory)
2. Signal from transfer box control unit does not correspond to expected signal (implausible signal)
3. No message via CAN drive (no signal/communication)
4. Transfer box control unit faulty

Tiptronic control unit plug

1. Pin 34 'CAN drive (low)'
2. Pin 46 'CAN drive (high)'

1. 'Tiptronic control module faulty' - internal system fault, limited functionality

1. 'Tiptronic control module faulty' - internal system fault, limited functionality

1. 'Tiptronic control module faulty'
2. 'No signal/communication' - no communication with Tiptronic control module via CAN drive

Pin 34 'CAN drive (low)'

Pin 46 'CAN drive (high)'

Input shaft speed (turbine speed) inductive pickup [Input/Turbine Speed Sensor 'A' Circuit]

Engine speed is the same as input shaft speed and is used for further calculations!

Note. The ignition must be switched off and then switched on again in order to display a fault indication in the instrument cluster.

1. 'Electrical fault in circuit', short circuit to B+ in wiring harness
2. 'Electrical fault in circuit', short circuit within wiring harness
3. 'Electrical fault in circuit', short circuit to ground in wiring harness
4. 'Electrical fault in circuit', open circuit in wiring harness
5. 'Electrical fault in circuit', Tiptronic control unit fault

Tiptronic control unit plug

1. Pin 39 'Input shaft speed inductive pickup', to existing transmission wiring plug 'pin B4'
2. Pin 51 'Input shaft speed inductive pickup', to existing transmission wiring plug 'pin B3'

Scheme 35

Data on 'input shaft speed inductive pickup'

The internal resistance cannot be measured!

1. Sensor Type: Hall IC
2. Max. current: 65 mA
3. No. of pulses: 12 per input shaft revolution

Note. Control unit replacement: Before replacing the 'Tiptronic control unit', the ground connections, power supply and plug connections on the control unit must be checked as OK. Please observe the coding of the control unit. After the test drive, read out the fault memory again with the Porsche System Tester II No. 9588. Additional causes of faults that could damage the 'Tiptronic control unit' should be detected and remedied.

DIAGNOSIS/TROUBLESHOOTING PROCEDURE

Input shaft speed (turbine speed) inductive pickup [Input/Turbine Speed Sensor 'A' Circuit Range/Performance]

The engine speed is the same as the input shaft speed and will be used for further calculations!

Note. The ignition must be switched off and then switched on again in order to display an error message in the instrument cluster.

1. 'Implausible signal', mechanical damage in sensor wheel or inductive pickup
2. 'Implausible signal', inductive pickup faulty
3. 'Implausible signal', Tiptronic control module faulty

Tiptronic control module plug

1. Pin '-'

Scheme 36

Internal resistance cannot be measured!

1. Sensor type: Hall-IC
2. Max. current: 65 mA
3. Number of pulses: 12 per input shaft revolution

Note. Replacing control module: Before replacing the 'Tiptronic control module', the ground connections, power supply and plug connections on the control module must be checked. Please observe the coding of the control module. After the test drive, read out the fault memory again with the Porsche System Tester II No. 9588. Additional causes of faults that could damage the 'Tiptronic control module' should be detected and remedied.

DIAGNOSIS/TROUBLESHOOTING PROCEDURE

Output shaft speed inductive pickup [Output Speed Sensor Circuit]

The PSM signal is used for further calculations!

Note. Stiff shifting operations with the vehicle standing. In the event of a double fault (output shaft speed inductive pickup and PSM fault), the reverse gear can be engaged during driving. The output shaft speed is then calculated via the input shaft speed.

Note. The ignition must be switched off and then switched on again in order to display a fault indication in the instrument cluster.

1. 'Electrical fault in circuit', short circuit to B+ in wiring harness
2. 'Electrical fault in circuit', short circuit within wiring harness
3. 'Electrical fault in circuit', short circuit to ground in wiring harness
4. 'Electrical fault in circuit', open circuit in wiring harness
5. 'Electrical fault in circuit', Tiptronic control unit fault

Tiptronic control unit plug

1. Pin 38 'output shaft speed inductive pickup', to existing transmission wiring plug 'pin B5'
2. Pin 50 'output shaft speed inductive pickup', to existing transmission wiring plug 'pin B6'

Data on 'output shaft speed inductive pickup'

The internal resistance cannot be measured!

1. Sensor Type: Hall IC
2. Max. current: 65 mA
3. No. of pulses: 24 per output shaft revolution

Note. Visual inspection: In the next troubleshooting section, please check first that the affected 'pins' on the Tiptronic control unit plug connection and the 'pins' on the 'existing transmission wiring' plug connection are neither damaged nor corroded. Remove any soiling or corrosion/oxidation. Replace damaged parts/wires.

Note. Control unit replacement: Before replacing the 'Tiptronic control unit', the ground connections, power supply and plug connections on the control unit must be checked as OK. Please observe the coding of the control unit. After the test drive, read out the fault memory again with the Porsche System Tester II No. 9588. Additional causes of faults that could damage the 'Tiptronic control unit' should be detected and remedied.

DIAGNOSIS/TROUBLESHOOTING PROCEDURE

Output shaft speed inductive pickup [Output Speed Sensor Circuit Range/Performance]

The PSM signal is used for further calculations!

Note. Rough gear shifts while vehicle is stationary. In the event of two faults (output shaft speed inductive pickup and PSM fault), reverse gear can be engaged while the vehicle is in motion. The output shaft speed is calculated using the input shaft speed.

Note. The ignition must be switched off and then switched on again in order to display an error message in the instrument cluster.

1. 'Implausible signal', mechanical damage in sensor wheel or inductive pickup
2. 'Implausible signal', inductive pickup faulty
3. 'Implausible signal', Tiptronic control module faulty

Tiptronic control module plug

1. Pin '-'

Internal resistance cannot be measured!

1. Sensor type: Hall-IC
2. Max. current: 65 mA
3. Number of pulses: 24 per output shaft revolution

Note. Replacing control module: Before replacing the 'Tiptronic control module', the ground connections, power supply and plug connections on the control module must be checked. Please observe the coding of the control module. After the test drive, read out the fault memory again with the Porsche System Tester II No. 9588. Additional causes of faults that could damage the 'Tiptronic control module' should be detected and remedied.

DIAGNOSIS/TROUBLESHOOTING PROCEDURE

Gear '6', incorrect ratio [Gear 6 Incorrect Ratio]

The target gear specified by the Tiptronic control module is compared with the current gear. This fault is set if the detected gear is not the same as the target gear. The detected gear is determined from: 'input shaft speed (turbine speed) inductive pickup - output shaft speed inductive pickup' x 'transmission ratio for gear 6'.

Note. The ignition must be switched off and then switched on again in order to display an error message in the instrument cluster.

System in limp-home mode 2: Fault caused by incorrect gear ratio or unusual switching!

Note. Please refer to ' LIMP-HOME MODE 2 ' table in the main chapter entitled 'Control module function (coding/programming)'!

Use the 'Actual values' menu in the Porsche System Tester II No. 9588 to check the transmission status and the actual values of the shift solenoid valves and sensors.

Note. There is a fault in the mechanical/hydraulic parts of the transmission.

1. 'Mechanical fault', clutch or brake band faulty
2. 'Mechanical fault', hydraulic control unit faulty

Tiptronic control module plug

1. Pin '-'

Incorrect gear ratio

The target gear specified by the Tiptronic control module is compared with the current gear. This fault is set if the detected gear is not the same as the target gear. The detected gear is determined from: 'input shaft speed (turbine speed) inductive pickup - output shaft speed inductive pickup' x 'transmission ratio of selected gear'.

Note. The ignition must be switched off and then switched on again in order to display an error message in the instrument cluster.

Use the 'Actual values' menu in the Porsche System Tester II No. 9588 to check the transmission status and the actual values of the shift solenoid valves and sensors.

Note. There is a fault in the mechanical/hydraulic parts of the transmission.

1. 'Mechanical fault', shift solenoid valve (S2) jams
2. 'Mechanical fault', shift solenoid valve C1 (modulation pressure) jams
3. 'Mechanical fault', abrupt switching from 'gear 2 to gear 1', modulation pressure solenoid valve (main) jams
4. 'Mechanical fault', hydraulic control unit faulty or screws loose
5. 'Mechanical fault', clutch or brake band faulty
6. 'Mechanical fault', ATF pump faulty

Tiptronic control module plug

1. Pin '-'

Gear '1', incorrect ratio [Gear 1 Incorrect Ratio]

The target gear specified by the Tiptronic control module is compared with the current gear. This fault is set if the detected gear is not the same as the target gear. The detected gear is determined from: 'input shaft speed (turbine speed) inductive pickup - output shaft speed inductive pickup' x 'transmission ratio for gear 1'.

Note. The ignition must be switched off and then switched on again in order to display an error message in the instrument cluster.

System in limp-home mode 2: Fault caused by incorrect gear ratio or unusual switching!

Note. Please refer to ' LIMP-HOME MODE 2 ' table in the main chapter entitled 'Control module function (coding/programming)'!

Use the 'Actual values' menu in the Porsche System Tester II No. 9588 to check the transmission status and the actual values of the shift solenoid valves and sensors.

Note. There is a fault in the mechanical/hydraulic parts of the transmission.

1. 'Mechanical fault', clutch or brake band faulty
2. 'Mechanical fault', hydraulic control unit faulty

Tiptronic control module plug

1. Pin '-'

Gear '2', incorrect ratio [Gear 2 Incorrect Ratio]

The target gear specified by the Tiptronic control module is compared with the current gear. This fault is set if the detected gear is not the same as the target gear. The detected gear is determined from: 'input shaft speed (turbine speed) inductive pickup - output shaft speed inductive pickup' x 'transmission ratio for gear 2'.

Note. The ignition must be switched off and then switched on again in order to display an error message in the instrument cluster.

System in limp-home mode 2: Fault caused by incorrect gear ratio or unusual switching!

Note. Please refer to ' LIMP-HOME MODE 2 ' table in the main chapter entitled 'Control module function (coding/programming)'!

Use the 'Actual values' menu in the Porsche System Tester II No. 9588 to check the transmission status and the actual values of the shift solenoid valves and sensors.

Note. There is a fault in the mechanical/hydraulic parts of the transmission.

1. 'Mechanical fault', clutch or brake band faulty
2. 'Mechanical fault', hydraulic control unit faulty

Tiptronic control module plug

1. Pin '-'

Gear '3', incorrect ratio [Gear 3 Incorrect Ratio]

The target gear specified by the Tiptronic control module is compared with the current gear. This fault is set if the detected gear is not the same as the target gear. The detected gear is determined from: 'input shaft speed (turbine speed) inductive pickup - output shaft speed inductive pickup' x 'transmission ratio for gear 3'.

Note. The ignition must be switched off and then switched on again in order to display an error message in the instrument cluster.

System in limp-home mode 2: Fault caused by incorrect gear ratio or unusual switching!

Note. Please refer to ' LIMP-HOME MODE 2 ' table in the main chapter entitled 'Control module function (coding/programming)'!

Use the 'Actual values' menu in the Porsche System Tester II No. 9588 to check the transmission status and the actual values of the shift solenoid valves and sensors.

Note. There is a fault in the mechanical/hydraulic parts of the transmission.

1. 'Mechanical fault', clutch or brake band faulty
2. 'Mechanical fault', hydraulic control unit faulty

Tiptronic control module plug

1. Pin '-'

Gear '4', incorrect ratio [Gear 4 Incorrect Ratio]

The target gear specified by the Tiptronic control module is compared with the current gear. This fault is set if the detected gear is not the same as the target gear. The detected gear is determined from: 'input shaft speed (turbine speed) inductive pickup - output shaft speed inductive pickup' x 'transmission ratio for gear 4'.

Note. The ignition must be switched off and then switched on again in order to display an error message in the instrument cluster.

System in limp-home mode 2: Fault caused by incorrect gear ratio or unusual switching!

Note. Please refer to ' LIMP-HOME MODE 2 ' table in the main chapter entitled 'Control module function (coding/programming)'!

Use the 'Actual values' menu in the Porsche System Tester II No. 9588 to check the transmission status and the actual values of the shift solenoid valves and sensors.

Note. There is a fault in the mechanical/hydraulic parts of the transmission.

1. 'Mechanical fault', clutch or brake band faulty
2. 'Mechanical fault', hydraulic control unit faulty

Tiptronic control module plug

1. Pin '-'

Gear '5', incorrect ratio [Gear 5 Incorrect Ratio]

The target gear specified by the Tiptronic control module is compared with the current gear. This fault is set if the detected gear is not the same as the target gear. The detected gear is determined from: 'input shaft speed (turbine speed) inductive pickup - output shaft speed inductive pickup' x 'transmission ratio for gear 5'.

Note. The ignition must be switched off and then switched on again in order to display an error message in the instrument cluster.

System in limp-home mode 2: Fault caused by incorrect gear ratio or unusual switching!

Note. Please refer to ' LIMP-HOME MODE 2 ' table in the main chapter entitled 'Control module function (coding/programming)'!

Use the 'Actual values' menu in the Porsche System Tester II No. 9588 to check the transmission status and the actual values of the shift solenoid valves and sensors.

Note. There is a fault in the mechanical/hydraulic parts of the transmission.

1. 'Mechanical fault', clutch or brake band faulty
2. 'Mechanical fault', hydraulic control unit faulty

Tiptronic control module plug

1. Pin '-'

1. 'Mechanical fault', 'oil pressure switch 1' signal stays 'ON' for more than one second. The Tiptronic control module carried out an electrical check on the electrical wires and oil pressure switch 1 and found them to be OK. Oil pressure switch 1 jams/sticks mechanically.
2. 'Mechanical fault', 'oil pressure switch 1' signal stays 'ON' for more than one second. The Tiptronic control module carried out an electrical check on the electrical wires and oil pressure switch 1 and found them to be OK. The 'shift solenoid valve C1 (modulation pressure)' jams/sticks mechanically.

Tiptronic control module plug

1. Pin '-'

Note. The 'Diagnosis/troubleshooting' shown below is adapted to suit the fault type displayed in the tester (please note fault type numbering 1,2,... etc.!). The fault memory Info key [F8] on the 9588 Porsche System Tester II can be used to read out the fault type in the 'extended fault memory'.

1. 1.) 'Open circuit/short circuit to B+': No signal from oil pressure switch 1
2. 2.) 'Short circuit to ground': Continuous signal from oil pressure switch 1

Tiptronic control module plug

1. Pin 24 'transmission oil pressure switch 1', existing transmission wiring plug 'pin B7'

Data on transmission oil pressure switch 2

1. Max. power consumption: 10 mA at an operating voltage (VIG) of 16.5 V

Note. Visual inspection: In the next troubleshooting section, please check first that the affected 'pins' on the Tiptronic control module plug connection and the 'pins' on the 'existing transmission wiring' plug connection are neither damaged nor corroded. Remove any soiling or corrosion/oxidation. Replace damaged parts/wires.

Note. Control unit replacement: Before replacing the 'Tiptronic control unit', the ground connections, power supply and plug connections on the control unit must be checked as OK. Please observe the coding of the control module. After the test drive, read out the fault memory with the 9588 Porsche System Tester II again. Additional causes of faults that could damage the 'Tiptronic control module' should be detected and remedied.

1. Troubleshooting only for fault type: 'Open circuit/short circuit to B+' TROUBLESHOOTING PROCEDURE FOR OPEN CIRCUIT/SHORT CIRCUIT TO B+ Work instruction Display OK If not OK 1 Check for short circuit to B+ with 'Tiptronic control module' plug disconnected and sensor plug connected (existing transmission wiring): Switch off ignition Pull plug off Tiptronic control module Switch on ignition Measure voltage between 'pin 24' and ground on Tiptronic control module plug. < 0.3 V Go to Step 2 Repair wiring harness to Tiptronic control unit (existing transmission wiring). --> End 2 Check for short circuit with both 'Tiptronic control module' plug and sensor plug disconnected (existing transmission wiring): Switch off ignition Pull off sensor plug Measure resistance between 'pin B7' and pins 'B1, B2, B3, B4, B5, B6, B8' on sensor plug (existing transmission wiring). infinity ohms Go to Step 3 Repair wiring harness to Tiptronic control unit (existing transmission wiring). --> End 3 Check for open circuit with both 'Tiptronic control module' plug and sensor plug disconnected (existing transmission wiring): Measure resistance between 'pin 24' of Tiptronic control module plug and 'pin B7' of sensor plug (existing transmission wiring). < 5 ohms Go to Step 4 Repair wiring harness to Tiptronic control unit (existing transmission wiring). --> End 4 Check wire in the transmission for open circuit: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter, perform visual inspection of plug and wiring: Sensor plug (existing transmission wiring) connected Measure resistance between 'pin 24' on Tiptronic control module plug and oil pressure switch 1 plug. < 5 ohms Go to Step 5 Replace wiring harness in the transmission. --> End 5 Replace oil pressure switch 1 Only replace if the wiring in the transmission was checked for chafing damage and found to be OK. --> End If fault has not been remedied, then: Go to Step 6 6 Replace Tiptronic control module See note on replacing control units! --> End
2. Troubleshooting only for fault type: 'Short circuit to ground' TROUBLESHOOTING PROCEDURE FOR SHORT CIRCUIT TO GROUND Work instruction Display OK If not OK 1 Check for short circuit to ground with 'Tiptronic control module' plug disconnected and sensor plug connected (existing transmission wiring): Switch off ignition Pull plug off Tiptronic control module Measure resistance between 'pin 24' and ground on Tiptronic control module plug. infinity ohms Go to Step 5 Go to Step 2 2 Check for short circuit to ground with both 'Tiptronic control module' plug and sensor plug disconnected (existing transmission wiring): Disconnect sensor plug (existing transmission wiring) Measure resistance between 'pin 24' and ground on Tiptronic control module plug. infinity ohms Go to Step 3 Repair wiring harness to Tiptronic control unit (existing transmission wiring). --> End 3 Check for short circuit with both 'Tiptronic control module' plug and sensor plug disconnected (existing transmission wiring): Measure resistance between 'pin B7' and pins 'B1, B2, B3, B4, B5, B6, B8' on sensor plug (existing transmission wiring). infinity ohms Go to Step 4 Repair wiring harness to Tiptronic control unit (existing transmission wiring). --> End 4 Check wire in the transmission for short circuit to ground: (Observe warning notes!) Remove ATF pan on the transmission (first drain fluid). Remove ATF filter, perform visual inspection of plug and wiring: Pull off plug on oil pressure switch 1. Measure resistance between disconnected plug (wiring side) and ground (transmission housing). infinity ohms Go to Step 5 Replace wiring harness in the transmission. --> End 5 Replace oil pressure switch 1 Only replace if the wiring in the transmission was checked for chafing damage and found to be OK. --> End If fault has not been remedied, then: Go to Step 6 6 Replace Tiptronic control module See note on replacing control units! --> End

1. 'Mechanical fault', 'oil pressure switch 2' signal stays 'ON' for more than one second. The Tiptronic control module carried out an electrical check on the electrical wires and oil pressure switch 2 and found them to be OK. Oil pressure switch 2 jams/sticks mechanically.
2. 'Mechanical fault', 'oil pressure switch 2' signal stays 'ON' for more than one second. The Tiptronic control module carried out an electrical check on the electrical wires and oil pressure switch 2 and found them to be OK. The hydraulic valve for activating brake band 2 jams/sticks mechanically.
3. 'Mechanical fault', 'oil pressure switch 2' signal stays 'ON' for more than one second. The Tiptronic control module carried out an electrical check on the electrical wires and oil pressure switch 2 and found them to be OK. The 'shift solenoid valve S1' jams/sticks mechanically.

Tiptronic control module plug

1. Pin '-'

Note. The 'Diagnosis/troubleshooting' shown below is adapted to suit the fault type displayed in the tester (please note fault type numbering 1,2,... etc.!). The fault memory Info key [F8] on the Porsche System Tester II No. 9588 can be used to read out the fault type in the 'extended fault memory'.

1. 1.) 'Open circuit/short circuit to B+': No signal from oil pressure switch 2
2. 2.) 'Short circuit to ground': Continuous signal from oil pressure switch 2

Tiptronic control module plug

1. Pin 25 'transmission oil pressure switch 2', existing transmission wiring plug 'pin B8'

Battery voltage, terminal 30

Note. First check the fuse, If fault code '1045 Selector lever switch' is also stored in memory, this indicates a faulty fuse or an open circuit in the wire for the Tiptronic control module and selector lever switch. Affected fuse: fuse 29 in fuse carrier at right of dashboard.

1. 'Short circuit to ground', fuse faulty
2. 'Short circuit to ground', short circuit to ground or open circuit in wire
3. 'Short circuit to ground', battery/three-phase generator faulty
4. 'Short circuit to ground', Tiptronic control module faulty

Tiptronic control module plug

1. Pin 3 'terminal 30', from fuse carrier at right of dashboard 'fuse 29'