Introduction
Introduction
Tiptronic
System G1XX
General Instructions/Safety Instructions
The following points must be observed during vehicle diagnosis:
- The coding must be observed when replacing a Tiptronic control module.
- Erase the fault memory with the Porsche System Tester 2 and perform a test drive after performing troubleshooting or repairs.
- After the test drive, read out the fault memory again with the Porsche System Tester 2.
Caution!
Danger of damage.
- Never disconnect the battery with the engine running.
- Never start the engine without the battery properly connected.
- Never use a boost charger to start the engine.
- The negative terminal of the battery must be disconnected before any welding work on the car.
- Never connect or disconnect the wiring harness plugs of the control modules or other electronic components with the ignition switched on.
General Information About the Fault Memory
The faults can be divided into 4 groups:
Group 1:
Faults are automatically reset it they are currently no longer present: fault no. 18, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 33, 34, 35, 36, 37, 38, 39, 40, 41.
Group 2:
Faults are reset when the ignition is switched on/off: fault no. 7, 8, 15, 50, 54.
Group 3:
Faults are reset when the ignition is switched on/off depending on an E2PROM background counter (fault rectification counter) (conditional reset after ignition off/on): fault no. 2, 3, 4, 5, 6, 7, 10, 11, 12, 13, 14, 17, 55.
Group 4:
Faults are not reset and can only be deleted using the Diagnostic Tester: fault no. 53, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65.
Environmental data
Apart from the fault memory, environmental data are also stored. In detail, these are:
- Time after ignition on (max. 5.1 sec) when fault occurs
- Supply voltage when fault occurs
- Gear information when fault occurs
Emergency operation
During emergency operation, the redundancy transistor is switched off. In addition, all the setpoints for the change-over and control valves are set to 0. The emergency operation status can be reset using the fault monitoring function (faults that can be reset).
Minimal cycle
The minimal cycle differs from the emergency operation in that it can not be quitted using the fault monitoring function. If all faults are deleted using the application aids, the minimal cycle is only quitted after ignition off/on. In the minimal cycle, the programs are called up in the control module like in the function mode.
Fault memory key [F8]
In order for the fault memory to be able to assess a fault correctly, the key [F8] must be pressed. This information must then be saved and printed by pressing the key [F4]. If a fault code is saved with the status "Not present" and no other problems are present, the fault memory should be deleted.
- - - - - - / Signal Implausible/No Signal Change/Open Circuit - Short Circuit to Ground/Short Circuit to B+
- - - - -: No data available.
Signal implausible: The signal being received by the control module differs from the expected signal.
No signal change: The signal being received by the control module does not change.
Open circuit short circuit to ground: There is (present) or was (not present) a short circuit to ground or an open circuit in the circuit to the control module terminal.
Open circuit short circuit to B+: There is (present) or was (not present) a short circuit to B+ or an open circuit in the circuit to the control module terminal.
Short circuit to ground: There is (present) or was (not present) a short circuit to ground in the circuit to the control module terminal.
Short circuit to B+: There is (present) or was (not present) a short circuit to B+ in the circuit to the control module terminal.
Present/not present
The fault is detected as being present or not present.