GF07.61-P-3020AM ME-SFI Two-Sensor Control, Function

GF07.61-P-3020AM ME-SFI Two-sensor Control, Function
ENGINE 113.990 in MODEL 211, 219
ENGINE 113.991 in MODEL 215, 220
ENGINE 113.992 in MODEL 230 up to Model Year 2008 /AEJ 07
ENGINE 113.993 in MODEL 463 up to 31.5.12
ENGINE 113.995 in MODEL 230 up to Model Year 2008 /AEJ 07





157 Firewall catalytic converter
158 Underfloor catalytic converter
A1 Instrument cluster
A1e26 "CHECK ENGINE" indicator lamp (for )
A1e58 Engine diagnosis indicator lamp (except )
G3/3 Left O2 sensor upstream of TWC
G3/4 Right O2 sensor upstream of TWC
G3/5 Left O2 sensor downstream of TWC
G3/6 Right O2 sensor downstream of TWC
N3/10 ME-SFI [ME] control unit
X11/4 Data link connector
Y62 Fuel injection valves

CAN CAN data bus (Controller Area Network)

The ME engine control unit determines the lambda mean value from signals from the O 2 sensors downstream of TWC. This value is compared with a stored value for optimum exhaust emissions. If the deviation is too large after a number of measurements, a correction variable (delay time) is determined for the lambda control.
The correction variable (value for new O 2 sensor upstream TWC approx. 0) makes it possible to compensate for aging of the O 2 sensors upstream of TWC within certain limits. If the correction value exceeds the specified limit value, the O 2 sensors upstream of the catalytic converter must be replaced.
The correction values are map-controlled and are implemented by the ME control unit by adapting the fuel injection.
If the limit value is exceeded or the plausibility check of the O 2 sensor signal turns out negative, the engine diagnosis indicator lamp or in the case of the CHECK ENGINE indicator lamp lights up.

Exceeding a limit is stored in the fault memory and can be read out and deleted using STAR DIAGNOSIS.

The effect of the firewall catalytic converters is monitored based on the O2 sensor signals downstream of TWC.