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Coolant temperature sensor
The temperature sensor measures the temperature of the coolant and transmits electrical signals to the control device. The sensor has NTC-element (NTC - negative temperature coefficient), which reduces its resistance with increasing temperature. When a sensor failure control device selects an equivalent value which corresponds to the temperature of coolant in the engine warmed up to operating temperature. When outside temperatures are low and the engine is cold, this leads to difficulties in starting the engine, and for his work outside the regime. Temperature sensor located in the thermostat housing. Withdrawal
| PERFORMANCE ORDER | | 1. Reduce the pressure in the coolant circuit. To do this, open the lid of the expansion tank with the coolant. | | 2. Remove the protective cover (5/3) from the thermostat housing. | | 3. Remove the mains plug and remove the sensor (B11 / 3). |
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Check | PERFORMANCE ORDER |  | 1. Suspend the sensor in a water bath and slowly heat it. | | 2. Check with an ohmmeter resistance temperature sensor. The measured value is considered normal if it is within the tolerance of 5% (see. Table Resistance temperature sensor). | | 3. If you are not measuring sensor reaches a predetermined value, it should be replaced. |
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Setting | PERFORMANCE ORDER | | 1. Screw the sensor with a new sealing ring and tighten to a torque of 20 Nm | | 2. Push the mains plug wires. | | 3. Warm up the engine and check for leaks. Recheck the coolant level. |
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Resistance temperature sensor
TEMPERATURE | RESISTANCE | 20 ?� C | OK. 2500 Ohm | 30 ?� C | OK. 1700 Ohm | 40 ?� C | OK. 1170 Ohm | 50 ?� C | OK. 830 ohms | + 60 ?� C | OK. 600 ohms | +70 ?� C | OK. 435 ohms | 80 ?� C | OK. 325 ohms | + 90 ?� C | OK. 245 ohms | +100 ?� C | OK. 185 ohms |
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