WIS 82.00 Electrical System, Body, General: Difference between revisions

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=[[WIS 54.15 Fuse and Relay Box|Fuses - Electrical System]]=
=[[WIS 54.15 Fuse and Relay Box|Fuses - Electrical System]]=


=[[Temperature Sensors - Electrical System]]=
=Temperature Sensors - Electrical System=
==Description - Temperature Sensors==
Temperature sensors are commonly constructed using temperature sensitive resistors, also known as thermistors.
 
A thermistor is just a temperature dependent resistor. Unfortunately, its dependence is highly nonlinear, but fortunately for most applications the non-linearity is easily compensated for.
 
[[File:Typical_NTC_Thermistor_Resistance_Temperature_Characteristic.JPG|400px|center]]
 
The standard formula for calculating the resistance  of a negative temperature coefficient (NTC) thermistor as a function of temperature is as follows, where;
* R25C is the nominal thermistor resistance at room temperature,
* ß is the thermistor’s material constant in degrees Kelvin.
* T is the thermistor’s actual temperature in degrees Celsius.
 
[[File:NTC_Thermistor_Resistance_Temperature_Formula.JPG|250px|center]]
 
==Functions - Temperature Sensors==
In the W220 as in other M-B vehicles there are many instances of NTC Thermistors used to measure temperature. Examples are:
* ACC In Cabin Air Temperature Sensor (Overhead Control Panel (OCP)
* ACC In Cabin Air Temperature Sensor (Pushbutton Control Module)
* Automatic transmission fluid Temperature
* Engine coolant temperature
* Mass Air Flow
* Oil temperature
* ACC Outside Temperature Sensor
* Refrigerant Temperature Sensor
 
==Specification - Temperature Sensors==
Refer to the relevant Wiki Section.
* [[In Cabin Air Temperature Sensor (N70/b1) and Aspirator in Overhead Control Panel (OCP) (N70)|ACC In Cabin Air Temperature Sensor (Overhead Control Panel (OCP) (N70))]]
* [[In Cabin Air Temperature Sensor (N22/b1) and Aspirator in Pushbutton Control Module (N22)|ACC In Cabin Air Temperature Sensor (Pushbutton Control Module (N22))]]
* [[WIS 27.19 Transmission – Electrical System|Sensor - Automatic Transmission Fluid Temperature]]
* [[WIS 20.00 General|Sensors - Coolant Temperature]]
* [[WIS 07.07 Air Volume Gauge, Air Mass Gauge|Sensor - MAF Element]]
* [[WIS 15.60 Temperature Sensor|Sensor – Oil Temperature]]
* [[Outside Temperature Sensor (B14)|Sensor - Outside Air Temperature]]
* [[R134A Refrigerant Temperature Sensor (B12/1)|Sensor - Refrigerant Temperature]]

Latest revision as of 16:36, 20 July 2021

Circuit Wiring - Electrical System

Back to: WIS 82.00 Electrical System, Body, General

Abbreviations - M-B Circuit Wiring Diagrams

Color Colour Code - M-B Circuit Wiring Diagrams

Mercedes-Benz Circuit Wiring Diagrams Color Colour Codes
Abbreviation Color Colour in German Color Colour in English
bl blae blue
br braun brown
ge gelb yellow
gn grün green
gr grau grey or gray
nf transparent transparent
or orange orange
rs rosa pink
rt rot red
sw schwarz black
tr transparent transparent
vi violett violet
ws weiß white

Wiring Diagrams - M-B Circuit Wiring Diagrams

Thanks to Benz World Member, Pinkster, here is a link to wiring diagrams for most MB models, including the W220, at Internet Site hosted by BBB Industries.

http://www.bbbind.com/free_tsb.html


Fuses - Electrical System

Temperature Sensors - Electrical System

Description - Temperature Sensors

Temperature sensors are commonly constructed using temperature sensitive resistors, also known as thermistors.

A thermistor is just a temperature dependent resistor. Unfortunately, its dependence is highly nonlinear, but fortunately for most applications the non-linearity is easily compensated for.

The standard formula for calculating the resistance of a negative temperature coefficient (NTC) thermistor as a function of temperature is as follows, where;

  • R25C is the nominal thermistor resistance at room temperature,
  • ß is the thermistor’s material constant in degrees Kelvin.
  • T is the thermistor’s actual temperature in degrees Celsius.

Functions - Temperature Sensors

In the W220 as in other M-B vehicles there are many instances of NTC Thermistors used to measure temperature. Examples are:

  • ACC In Cabin Air Temperature Sensor (Overhead Control Panel (OCP)
  • ACC In Cabin Air Temperature Sensor (Pushbutton Control Module)
  • Automatic transmission fluid Temperature
  • Engine coolant temperature
  • Mass Air Flow
  • Oil temperature
  • ACC Outside Temperature Sensor
  • Refrigerant Temperature Sensor

Specification - Temperature Sensors

Refer to the relevant Wiki Section.

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