911 Carrera (997) F6-3.6L (2006)
1.
Switch on ignition.
2.
Switch on PCM2.1 if necessary by pressing the left rotary knob (-> Figure 1 -Item 1-).
3.
Press the "MAIN" and "TRIP" buttons (-> Figure 1 -Items 2 and 3-) simultaneously on the PCM2.1 to go to the "SW versions" display.
4.
Press the right rotary knob (-> Figure 1 -Item 4-) in the "SW versions" display to select the "PCM" menu item.
5.
Press the right rotary knob (-> Figure 1 -Item 4-) to confirm your selection.
The software version shown will be displayed, depending on the software version of the PCM2.1.
Reference
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