nents list' of detected devices is written and saved when the PCM2 · is started.

911 Turbo (996) PCM2/CDR23 91 nents list' of detected devices is written and saved when the PCM2 is started. MOST lock/unlock A lock occurs when the signal sent from the MMI via the MOST opti- cal/electrical is understood and answered by the connected MOST control modules. This applies a correct optical MOST signal. The lock is maintained until the signal is no longer detectable for a longer period of time (several µseconds) 'unlock'. Note! Using the function 'Reset all coding/transfer counters' all set fault counters of all components can be collectively reset to '0'. 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'. If no fault code is stored, the '*' symbol indicates a 'varying required and actual installed components list' in the Control mod- ules menu in front of the 'PCM2' system and in the 'PCM2 MMI func- tion selection' in front of the selection 'MOST required installed components list'. A comparison of these two lists can determine faulty components. Data transmission check Note! Using the function 'Reset all coding/transfer counters' all set fault counters of all components can be collectively reset to '0'. 9101 Control unit function - MMI 91-75 page 19 Printed in Germany – 43, 2003 SgfMMlwl