Diagnose
Status September 2003 (EvoBus-Service / AFT) Page: 57 of 83
4.1.11 Exhaust-gas temperature
The exhaust-gas temperature is calculated every 40 ms. The calculated exhaust-gas temperature is a
filtered variable (low-pass filter). If the voltage of the exhaust-gas temperature sensor is above 2.7 V or
below 0.3 V for more than 2 seconds, then the event "Fault measuring range exceeded or dropped below"
is detected and the fault code 6715 or 6716 is entered. In the case of a fault, a fixed substitute value of –
30°°C is output. Exhaust-gas temperature sensing is only possible with control units from hardware
version C2.
The characteristic curve of the coolant temperature sensor is stored in the engine data record.
Characteristic curve: Exhaust-gas temperature sensor
4.1.12 Vehicle speed (FR)
The vehicle speed is determined by the FR and made available to the EGM via CAN. This information is,
for example, required for the functions of the overrun fuel cut-off (SAS).
SEN - T exhaust-gas: sensor code
Exhaust-gas temperature [°C] = f(Sensor voltage [V])
Exhaust-gas temperature
Voltage
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