Initial Inspection and Diagnostic Overview

Function Status Register

Function description
The production diagnostic is a special mode for checking the wiring and functionality of the navigation system. For this, an automatic check of the individual malfunction locations is conducted and the result is stored permanently in the so called function status register (measured value block 007).

The production diagnostic can be deactivated or activated via adaptation (channel number 03).

The production diagnostic is also deactivated if a navigation-CD is inserted.

The function status register is also reset via the "Erase DTC Memory" function.

Test requirements:
- No navigation-CD is inserted
- Navigation switched on
- Tire circumference was adapted.
- Impulse number/wheel rotation (GALA) was adapted.
- Erase DTC memory. Erase DTC Memory (Scan Tool Function 05)
- Move vehicle at a speed of at least 10 km/h.
- With vehicle standing still select reverse gear for at least 2 seconds.

If the production diagnostic was performed correctly (all test requirements met) and if the navigation system is OK, the value 255 appears in measuring value block 007 (function status register).