MOST component check

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2004 Porsche Boxster, 2003 Porsche Boxster, 2002 Porsche Boxster, 2001 Porsche Boxster, and 2000 Porsche Boxster. However, it is still accessible from the selected car via links, so may be relevant.

The following checks are available under this menu item:

MOST system check
Ring break diagnosis
Ring break diagnosis line
Optical performance check

NOTE:

The engine must not be started during the automatic check. Follow the instructions of the Porsche System Tester II 9588 :

Test sequences are automatic. The test results are displayed.

MOST COMPONENT CHECK MENU ITEM - FUNCTION (MMI)

Menu item	Function
"BULL" MOST system check	Using this menu item, an automatic MOST system check can be carried out. Connect and start the Porsche System Tester II 9588 and switch on the ignition Select Boxster (986) in the Vehicle type menu and confirm with the ">>" key Select PCM in the Control units selection menu and confirm with the ">>" key Select MOST component check in the Boxster (986) CDR23 function selection menu and confirm with the ">>" key Select MOST system check in the CDR23 MOST component check menu and confirm with the ">>" key The test result is displayed Before replacing control units, the optical waveguide and the ring break diagnosis line must be checked.
"BULL" Ring break diagnosis	Using this menu item, an automatic ring break diagnosis can be carried out. Connect and start the Porsche System Tester II 9588 and switch on the ignition Select Boxster (986) in the Vehicle type menu and confirm with the ">>" key Select PCM in the Control units selection menu and confirm with the ">>" key Select MOST component check in the Boxster (986) CDR23 function selection menu and confirm with the ">>" key Select MOST ring break diagnosis in the Boxster (986) CDR23 MOST component check menu and confirm with the ">>" key The test result is displayed Before replacing control units, the optical waveguide and the ring break diagnosis line must be checked.
"BULL" Ring break diagnosis the	Using this menu item, an automatic check of the ring break diagnosis line can be carried out. Connect and start the Porsche System Tester II 9588 and switch on the ignition Select Boxster (986) in the Vehicle type menu and confirm with the ">>" key Select PCM in the Control units selection menu and confirm with the ">>" key Select MOST component check in the Boxster (986) CDR23 function selection menu and confirm with the ">>" key Select MOST ring break diagnosis line in the Boxster (986) CDR23 MOST component check menu and confirm with the ">>" key The test result is displayed Before replacing control units, the optical waveguide and the ring break diagnosis line must be checked.
Menu item	Function
"BULL" Optical performance check	Using this menu item, the transmission errors can be read out. Connect and start the Porsche System Tester II 9588 and switch on the ignition Select Boxster (986) in the Vehicle type menu and confirm with the ">>" key Select PCM in the Control units selection menu and confirm with the ">>" key Select MOST component check in the Boxster (986) CDR23 function selection menu and confirm with the ">>" key Select Optical performance check in the Boxster (986) CDR23 MOST component check menu and confirm with the ">>" key The test result is displayed Before replacing control units, the optical waveguide and the ring break diagnosis line must be checked.