SL 55 AMG (230.474) V8-5.5L SC (113.992) (2003)
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Component Identification
The purpose of the O2 sensor heater is to rapidly heat up the O2 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 O2 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 O2 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.
GF07.61-P-4022AM ME-SFI Lambda Control, Function
GF07.61-P-4022AM ME-SFI Lambda Control, Function
