Mercedes-Benz Vehicle Communication Software Manual [702kb ...

TestingTesting DAS (Immobilizer) Systemscontrol and traction control (ASR). Vehicles with ASR usually have an orange warning light onthe instrument cluster.Table 4-1 1992–96 Mercedes EA/CC/ISC application coverageSeries Model Year Chassis # Engine #300CE 1993–95 124.052/092 104.9921993 124.028 104.942300E1241993–95 124.032 104.992400E 1992–95 124.034 119.975500E 1992–94 124.036 119.974300SE 1992–93 140.032 104.990140400SE 1992 140.042400SEL 1993–95 140.043119.971600SEC 1993–95 140.076600SEL 1992 140.057120.980S320 1994–96 140.032 104.994202 C280 1994–95 202.028 104.941Note the following when testing EA/CC/ISC systems:• The EA/CC/ISC modules are on the CAN bus and can turn the Check Engine Light on.Always check, repair and clear any EA/CC/ISC codes.• The ECU or other modules may also report a code pointing to a fault at the EA/CC/ISC.Testing DAS (Immobilizer) SystemsThe Drive Authorization System (DAS) is the name for the Mercedes Immobilizer systemcombining vehicle access and drive authorization. Prior to 1996, DAS was separated from theengine control module, and ignition switch operation was based solely on a mechanical key. Anearly version of DAS was first introduced in approximately 1993 when Mercedes startednetworking DAS, the engine, transmission, ABS, and traction control systems on a common databus called CAN.The Mercedes pneumatic control door lock system has been in existence since the early 1980s,and although now it is much more advanced, it is still in use today. It steadily became moresophisticated as features were added like central locking, starter lock-out, and steering lock-out.NOTE:i Some late models, such as ML- and C-class series, have completely eliminated the pneumaticcontrol system and now use a fully electronic door lock system.Central LockingCentral Locking is the ability to lock or unlock the complete vehicle at one time and from multiplelocations using either an infrared beam or a radio frequency signal. The infrared remote control16