Corsa D
|
Emergency running program in Easytronic (M20 MTA) Note: The task of the emergency run program is as far as possible to ensure the functionality of the vehicle. In the event of an error, this happens without it being critical for the driver. In the event of errors relating to certain signals, it is sufficient to consult replacement/reference values, for other signals and insofar as the Easytronic system is not present, an emergency program is activated or the vehicle shuts down. The following sections describe how the vehicle behaves during the active emergency run program. Errors are distinguished between errors stored in the error memory and errors not stored in the error memory. The M20 MTA system has 4 interfaces for indicating system faults or problems to the driver:
Behaviour if faults occur The MIL check lamp is triggered only when the result of a separate exhaust emissions test clearly shows that the legal emission limits have been exceeded due to a transmission fault. If a fault occurs and the SVS check lamp is triggered, the emergency running program 1 is activated. On both emergency running programs, it is no longer possible to perform a manual gear change. Manual Mode, Sport Mode and Winter Mode are then de-activated. If "F" is flashing on the display, the SVS check lamp is also triggered. On safety-relevant faults, the system is switched off and it is not possible to drive on. Emergency running program 1 The purpose of emergency running program 1 is to indicate to the driver that a system fault has occurred. This is shown by the modified shift point. The vehicle must be taken to a Service Workshop immediately for diagnosis. The SVS check lamp and emergency running program 1 are activated when faults occur in the MTA system, if these signals can be read by other sensors, e.g. the wheel speed sensor can also be read through the signal from the gearbox input speed sensor. In this case, emergency running program 1 is active. If another fault occurs, e.g. gearbox input speed sensor failure, the system is switched off. Emergency running program 2 Emergency running program 2 is activated when the engine control unit reduces the top speed of the engine by lowering the fuel shut-off point when a fault has been detected. This fault is communicated by the engine control unit via CAN, and the transmission control unit switches to emergency running program 2. The shift points are set by the gearbox control unit so that the reduced engine speed cannot be exceeded even on downshift. |
||||||||||||||||
