Introduction

Introduction
Tiptronic
System G43

General Instructions/Safety Instructions

The following points must be observed during vehicle diagnosis:
- The coding for the country region and the brake system must be observed when replacing a Tiptronic control module.
- Erase the fault memory with the Porsche System Tester II No. 9588 and perform a test drive after troubleshooting or repairs.
- After the test drive, read out the fault memory again with the Porsche System Tester II No. 9588.

CAUTION:
Risk of property damage if batteries and plug connectors of the control modules are handled incorrectly.
- Disconnect the battery terminals only when the engine is not running.
- Start the engine only if the battery terminals are firmly connected.
- Connect or disconnect the plug connections of the control modules or other electronic components only with the ignition switched off.
- A/ways disconnect the negative terminal of the battery before performing welding work on the car.

Diagnosis Setup
If the Porsche System Tester II No. 9588 cannot establish communication with the control module, the cause may be the following faults:
- No voltage supply for the Tiptronic control module. (Pins 26, 54, 55, 28, 6, 34)
- K-line faulty. (Pin 88)
- The input signal 'Kickdown switch' contains the information 'Kick-down switch closed' (ground).

General Information About the Fault Memory
- There are two fault memories for the control module: a non-volatile (primary) fault memory a volatile (secondary) fault memory.
- The primary fault memory of the control module can store up to 5 different faults at once.
- If all 5 fault-memory locations are full, no additional faults can be recorded.
- The faults entered in the primary fault memory are retained even if the control module is disconnected from the vehicle or if the starter battery is disconnected.
- The secondary fault memory of the control module can store all faults that occur.
- Fault entries in the secondary fault memory are lost if the control module is disconnected or if the starter battery Is disconnected.
- For both fault memories, the only way to delete fault entries from the control module is to perform an ignition reset (off-on).

Diagnosis Conditions
Only if the preconditions listed under "Diagnosis conditions' have been met is it possible to recognize the fault. For this reason, it is necessary to comply with the specified procedure after remedying a fault:
1. Erase the fault memory.
2. Meet the preconditions listed under 'Diagnosis conditions'.
3. Read out the fault memory again.

Possible Fault Causes
This is where the possible fault causes leading to the fault are listed.
Please bear in mind that additional faults may be stored in the memory after troubleshooting under certain circumstances (e.g. if connectors are disconnected). After completing the repair, read out the fault memory of all control modules and delete the stored faults.

Diagnosis/Troubleshooting
- The stored faults are shown with the Porsche fault code and in plain-text form.
- It is possible to access the extended fault memory with the fault memory info key F8 on the Porsche System Tester II No. 9588. This information should then be saved and printed by pressing the key F4. The following information can be displayed:

OBD code
If present, the OBD diagnostic trouble code 'Pxxxx' is displayed only at the end of the extended fault memory.

Fault type
The following fault types are possible:
- - (no data available)
- Short circuit to B+
- Short circuit to ground
- Signal implausible
- No signal change
- Open circuit/short circuit to B+
- Open circuit/short circuit to ground
- Open circuit
- Below limit
- Above limit

Fault occurrence
The fault occurred as follows:
- Statically (i.e. once)
- Sporadically (i.e. more than once)

Fault status
The following status types are possible:
- Present (at the time of the last diagnosis routine)
- Not present (at the time of the last diagnosis routine)