1. 2.0L engine: remove the 6-pin plug from the heating control relay and measure the resistance between pin 6 on the plug and the housing (engine block). If the resistance tends to infinity, there is a break in the conductive line. If the resistance is below 1 ohm, then there is a short circuit in the electrical line.
Set value:
- at 25°C: 2442 ohm + 170 ohm
- at 80°C: 291 ohm + 16 ohm
2. 2.2/2.5L engine: Reduce coolant pressure. To do this, remove the cap from the expansion tank filled with coolant.
3. Disconnect the plug (At 11/4) and unscrew the coolant temperature sensor.
4. Disconnect the plug (B 11/8x1) and unscrew "coolant temperature sensor for subsequent heating" on the cylinder head.
Examination
1. Hang a temperature probe in the water bath and heat it slowly.
2. Check the temperature sensor resistance with an ohmmeter. The measured value is OK if it is within tolerance + 5% (see table Thermal sensor resistance).
3. If during measurements the temperature sensor does not reach the specified values, then it should be replaced.
Installation
1. Screw in the temperature sensor with a torque of 20 Nm.
2. Plug in the cable plug (connector).
3. Fill with coolant.
4. Warm up the engine and check the coolant level.
Temperature sensor resistance
Temperature | Resistance |
20°C | 2500 ohm |
30°С | 1700 ohm |
40°C | 1170 ohm |
50°С | 830 ohm |
60°С | 600 ohm |
70°C | 435 ohm |
80°C | 325 ohm |
90°C | 245 ohm |
100°C | 185 ohm |