The temperature sensor is located in the thermostat housing.
Removing
1. Reduce the pressure in the coolant circuit. To do this, open the lid of the coolant expansion tank.
2. Remove the protective cover (5/3) from the thermostat housing.
3. Remove the plug and unscrew the temperature sensor (B11/3).
Examination
1. Hang the temperature probe in the water bath and slowly heat it up.
2. Check the temperature sensor resistance with an ohmmeter. The measured value is considered normal if it is within the 5% tolerance (see table Thermal sensor resistance).
3. If during measurements the temperature sensor does not reach the specified values, it should be replaced.
Installation
1. Screw in the temperature sensor with a new O-ring and tighten to 20 Nm.
2. Plug in the cable connector.
3. Warm up the engine and check the tightness of the connections. Check the coolant level again.
Temperature sensor resistance
Temperature | Resistance |
+20°C | OK. 2500 ohm |
+30°С | OK. 1700 ohm |
+40°С | OK. 1170 ohm |
+50°C | OK. 830 ohm |
+60°C | OK. 600 ohm |
+70°C | OK. 435 ohm |
+80°C | OK. 325 ohm |
+90°C | OK. 245 ohm |
+100°C | OK. 185 ohm |