Control Module: Testing and Inspection

Control module function (coding/programming)

Integrated functions

The transfer box control module includes the functions listed below:
- Computer identification
- Computer configuration with ignition ON
- Checking the fault memory for fault entries, even in diagnostic mode
- Deleting the fault memory
- Reading measured values from switches and sensors

Supported functions:
- Diagnosis software number
- Drive link test with active fault checking

Basic setting:
- Adaptation/Resetting adaptation values
- Read memory
- Write memory
- Update programme
- Flash programme (end of volume)
- Protected against unauthorised access

Commissioning
When the ignition 'terminal 15' is switched on, an internal function test (initialisation phase) is performed in the transfer box control module. When the internal function test is completed successfully, all functions integrated into the transfer box control module are released.

Operating mode
The transfer box control module 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 and temperature, all incoming signals are processed by the integrated software and the appropriate monitoring and control processes are performed.

Data transfer
The transfer box control module sends and receives data/information via the following 'CAN data bus':
- CAN drive (C)
- Gateway (in instrument cluster)

Diagnosis
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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 transfer box control module sends messages and checks the CAN drive cyclically for messages from other control modules. If no messages are received for a certain time period, a fault is stored in the fault memory.

Adaptation

Work to be carried out after replacing a control module:
- Delete the adaptation values using the Porsche System Tester II No. 9588

Coding

NOTE: The transfer box control module does not have to be coded.