PCM2/CDR23 911 Turbo (996)91 · Menu item Function

PCM2/CDR23 911 Turbo (996)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 - 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. MOST switch The MOST - switch - switch is part of the PCM2. It keeps the electri- cal MOST closed if no other MOST control unit is optically con- nected to the MOST. The MOST switch is opened when a light signal is received from the connected MOST control modules. The following settings can be coded: ♦MOST switch open. ♦MOST switch closed. 91-75 page 22 9101 Control unit function - MMI SgfMMlwl Printed in Germany – 43, 2003