Menu item Function · ♦Supply voltage Under this menu item, it is possible to check the electri

911 Turbo (996) PCM2/CDR23 91 Menu item Function ♦Supply voltage Under this menu item, it is possible to check the electrical and optical MOST during troubleshooting. ♦9588 Connect and start the Porsche System Tester II and switch on the ignition. ♦Select vehicle type 911 (996) and the PCM2-GW control module and press the >> key. ♦Select the Actual values menu item and press the >> key. ♦Select the "Supply voltage" menu item using the > key and press the >> key. ♦Read out values from the display field. Man Machine Interface (MMI) The MMI is part of the PCM2 (on the mainboard). It carries out the diagnostics of the ring break diagnosis line (stub cable) and the diagnostics of the optical distribution line. MOST actual and required installed components lists All MOST control modules that are connected to the PCM2 are entered via diagnostic tester in the 'required installed components list'. Only the MOST control units recorded in the MOST required installed components list are activated. An 'actual installed compo- nents list' of detected devices is written and saved when the PCM2 is started. MOST component check Note! When there is a customer complaint or identifiable problems but no fault code entries, firstly the 'MOST component check' is to be selected in the PCM2 function selection menu and then the 'MOST system check' is to be carried out. The MOST component check can be reached via the menu PCM2 function selection. This comprises a summary of the following check processes: ♦Data transmission check. ♦MOST system check (with engine running). ♦Ring break diagnosis (with engine running). The MOST components check 'MOST system check' is to be carried out when the display indicates 'unavailable MOST control modules'. 9101 Control module function - external BOSE amplifier 91-104 page 7 Printed in Germany – 43, 2003 SgfVBlwl