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



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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