O2 sensor heater, function - GF07.61-P-3025AM
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
ENGINE 113.993 in MODEL 463 up to 31.5.12
ENGINE 113.995 in MODEL 230 up to Model Year 2008
The purpose of the O 2 sensor heater is to rapidly heat up the O 2 sensors to their operating temperature while preventing damage to the sensor ceramic through the relevant heat control.
The O2 sensor heater is actuated and pulsed by the ME control unit via a ground signal.
The voltage supply for the O 2 sensor heaters is provided via the ME control unit by the relevant fuse and relay module or SAM.
The sensor heater is switched off at coolant temperatures below approx. 20°C and at high engine speeds as a protection for the sensor ceramic.
The power absorption capacity of the O 2
sensor heater from an exhaust gas temperature of 350°C is less than 7 W.
The current in the cold state is increased by the factor 4.
| O2 sensors, location/task/design/function | GF07.04-P-4103AM | ||
| Crankshaft position sensor, location/task/design/function | GF07.04-P-4116AM | ||
| Coolant temperature sensor, location/task/design/function | GF07.04-P-5026AM | ||
| ME-SFI control unit, location/task/design/function | GF07.61-P-5000AM |