Mercedes S-class W202

1993-2000 of release

Repair and car operation



Mercedes W202
+ 1.2. The general data
+ 2. Maintenance service
+ 3. Engines
+ 4. Greasing system
+ 5. Cooling system
+ 6. Heating, ventilation
- 7. Ignition system
   7.2. Safety precautions at repair of electronic system of ignition
   7.3. Ignition coils
   + 7.4. Spark plugs
   - 7.5. The device of a preliminary warming up of a diesel engine
      - 7.5.1. Check of the device of a preliminary warming up
         7.5.1.1. A lamp накаливания
         7.5.1.2. An anchor
         7.5.1.3. Candles накаливания
         7.5.1.4. The temperature gauge of a cooling liquid
         7.5.1.5. A temperature-sensitive element of soaked up air
      7.5.2. Device self-diagnostics
+ 8. Fuel system
+ 9. Transmission
+ 10. A running gear
+ 11. A steering
+ 12. Brake system
+ 13. A body
+ 14. An electric equipment
+ 14.2. Electroschemes






7.5.1.4. The temperature gauge of a cooling liquid
THE GENERAL DATA

The temperature gauge takes temperature of a cooling liquid and transmits corresponding signals on the actuation device. The gauge contains a NTC-element (NTC – negative temperature factor) which reduces the resistance with rise in temperature. At the faulty gauge the actuation device gives out reserve size. It leads to that duration of a preliminary and subsequent warming up is incorrectly maintained.
PERFORMANCE ORDER
1. The engine of 2,0 l: remove 6-shtyrkovyj штеккер from the relay of management of a warming up and measure resistance between a counter 6 on штеккере and the case (the block of cylinders of the engine). If resistance aspires to infinity, in a current-carrying line breakage. If resistance more low 1 Ohm, in an electric line short circuit.
Preset value:
At temperature 25 ° C: 2442 Ohm + 170 Ohm
At temperature 80 ° C: 291 Ohm + 16 Ohm.
2. The engine of 2,2/2,5 l: reduce pressure of a cooling liquid. For this purpose uncover the compensatory tank filled with the cooling liquid.
3. Disconnect штеккер (In 11/4) and unscrew a temperature-sensitive element of a cooling liquid.
4. Disconnect штеккер (In 11/8х1) and unscrew "a temperature-sensitive element of a cooling liquid for the subsequent warming up" on a head of the block of cylinders.

Check

PERFORMANCE ORDER
1. Suspend in a water bath a temperature-sensitive element and slowly it heat up.
2. Check up an ohmmeter resistance of a temperature-sensitive element. The measured size is perfectly in order, if it is in admission limits + 5 % (Resistance of a temperature-sensitive element see the table).
3. If at measurements the temperature-sensitive element does not reach preset values it is necessary to replace it.

Installation

PERFORMANCE ORDER
1. Screw in a temperature-sensitive element with the moment 20 Н.м.
2. Spread cable штеккер (socket).
3. Fill in cooling liquid.
4. Warm up the engine and check up level of a cooling liquid.

Resistance of a temperature-sensitive element

TEMPERATURE
RESISTANCE
20 ° WITH
2500 Ohm
30 ° WITH
1700 Ohm
40 ° WITH
1170 Ohm
50 ° WITH
830 Ohm
60 ° WITH
600 Ohm
70 ° WITH
435 Ohm
80 ° WITH
325 Ohm
90 ° WITH
245 Ohm
100 ° WITH
185 Ohm