Car Communication

The following can be read off using car communication:

Read diagnostic trouble codes (DTCs) 

ME 7.0 engine management system contains approximately 135 diagnostic trouble codes (DTC). Each diagnostic trouble code (DTC) can give information on whether the fault depends on an open-circuit, short-circuit to supply voltage or short-circuit to ground. This gives a combined total of 405 different diagnostic trouble codes (DTCs).

The following output signals/components can be activated:

Activation 

• Injectors (sequentially)
• Power stages/ignition coils (sequentially)
• air conditioning (A/C) relay (compressor clutch)
• Output signal engine coolant temperature sensor
• Indicator lamp CRUISE
• Econometer signal to the Driver information module (DIM)
• Engine cooling fan (FC) (3 speeds)
• Engine speed (RPM) to DIM
• Electronic Throttle System warning lamp
• EVAP canister shut-off valve
• Turbocharger (TC) control valve
• Canister purge (CP) valve
• Fuel pump (FP) relay
• Malfunction Indicator Lamp (MIL)
• Heating front heated oxygen sensor (HO2S)
• Heating rear heated oxygen sensor (HO2S)
• Continuous Variable Valve Timing (CVVT) camshaft control valve
• Interlock function (starter motor relay),USA/CDN only 

Reading off plotter 

Here curves and values for approximately 90 parameters can be read off. As before a maximum of 3 can be read at the same time.

Activating diagnostic functions 

This is a new function for activating the different test phases in the following on-board diagnostic (OBD) systems:

• Return Fuel Lacking System (RFLS)
• Pulsed secondary air injection system (PAIR)