Menu item Function · ♦Ring break diagnosis (with Using this menu item, a ring break diagnosis can be ca

911 Turbo (996) PCM2/CDR23 91 Menu item Function ♦Ring break diagnosis (with Using this menu item, a ring break diagnosis can be carried out (with the engine running). engine running). ♦9588 Connect and start the Porsche System Tester II and switch on the ignition. ♦Select '911 Turbo (996)' in the Vehicle type menu and confirm with the >> key. ♦Select 'PCM2' in the Control modules menu and confirm with the >> key. ♦Select 'MOST components check' in the PCM2 function selection and confirm with the >> key. ♦Select "Ring break diagnosis (when the engine is running)" in the 911 Turbo (996) PCM2-GW MOST components check function selection and confirm with the >> key. 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 - optical/electrical MOST signals are transferred electrically within the PCM2 and opti- cally outside of the PCM2. Internally, the PCM2 consists of at least 2 nodes (GW and MMI), which are installed in the device and can also be expanded to four nodes by adding the navigation and VOCS nodes. The data is transferred outside of the PCM2 via the optical waveguide, which creates a connection to the nodes in the external MOST control modules such as external amplifiers, CD changers, and/or telephone/telematics (depending on the equipment). The gateway node represents the connection to CAN Comfort. 9101 Control unit function - gateway 91-63 page 17 Printed in Germany – 43, 2003 SgfGWlwl