What Does The Rear Sam Module Control On W220

Back to WIS 54.21 Command Units/Modules

Description - SAM (Signal Acquisition / Actuation Module)

A SAM (Signal Conquering Module) functions much as a network router does on a estimator or communications network. Information technology monitors input from various switches, controls, monitoring devices, and warning systems. When you push a push button on, for case, your dashboard, the signal goes through a SAM before the device you are decision-making responds. If there is something wrong with the device you are trying to operate, yous will probable then get a alert, delivered through the SAM to the Can (Controller Area Network) coach.

Types - SAM (Signal Acquisition / Actuation Module)

The left SAM in the engine compartment deals with all left forepart lights and the side light - except low beam (which comes from the correct SAM), further rear air outlet illumination and glove compartment lock illumination. It likewise interacts straight with rotary light switch, the HCS switch, the steering column adjustment motor grouping (the motors via left front fuse and relay module), ESP, SPS and BAS control, with AIRMATIC with ADS control unit or ABC command unit and via right front fuse and relay box with refrigerant compressor.

The left SAM gets signal input from the left front brake pad contact sensor, refrigerant force per unit area sensor, refrigerant temperature sensor, outside temperature brandish temperature sensor, brake fluid indicator switch and parking brake indicator switch.

The right SAM in the engine compartment deals with all right forepart lights and the side calorie-free - except low beam (which comes from the left SAM), and too the lights in glove box, centre panel storage and eyeglass compartment, ashtray and footwell. It also handles heating and pumping for the windshield washer nozzle and washer nozzle hose and pumping water for the Headlamp Cleaning Organisation; and the additional fan (radiator fan) for coolant, the fan for transmission oil cooler, and the circulation pump for the heating arrangement delivery unit.

The correct SAM gets betoken input from the right forepart brake pad contact sensor, coolant level indicator with windshield washer fluid level indicator (both are in series!) and Anti-Theft Alarm [EDW] hood switch. Incoming and outgoing signals for the switches and controls for lights, pumps, heaters and and then on in most cases are delivered via CAN from and to other controllers.

The rear SAM below the right rear seat cushion interacts directly with the trailer recognition control unit and with the ESP, SPS, BAS-controller. It communicates east.g. with the overhead control panel control unit via CAN. It also deals with all rear lights, closing the torso and fasten seat belts indications; additionally information technology reads the tank level sensor, a tilt sensor (Anti-Theft Alert inclination sensor), all iv door contacts and the rear brakes sensors.

The relay for the fuel pump is placed near the rear SAM but normally it will get its signal from the ME. Only AMG versions take an extra controller for the fuel pump.

Issues - SAM (Signal Acquisition / Actuation Module)

In addition to the fuses and relays, as mentioned, the SAMs have connections to the CAN busses. Some of these connections are located under the front seats of the car. Getting those connections wet due to water intrusion tin can besides cause problems in equipment routed through the SAMs. And, the SAM nether the back seat seems particularly affected when significant amounts of water intrude into the motorcar.

Your car has three CAN busses. CAN B is the interior (or torso) data bus; CAN C is the engine/chassis data bus; and Tin D is the diagnostics information omnibus. One can read perchance more that you wanted to know nearly CAN at http://www.mercedestechstore.com/pdf...2010-28-02.pdf

I can see that a problem may occur at the operating command; at the component being operated; somewhere in the Can bus; or in the SAM itself (including fuses and relays). The first affair to check are fuses and relays; then, the component; then the operating command - and if the trouble affects many components or switches, doubtable the SAM. You can get a skilful thought if y'all have a SAM trouble if y'all see malfunctions in multiple systems all operated via the same SAM. Nonetheless, be certain to notation Eric's cautionary note in mail #thirteen below. SAMs don't neglect oftentimes, and when they practise it is often because they take been soaked in h2o.

Ane other affair that can cause random, repetitive mistake letters and malfunctions is a failing battery.