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Sensors
The gauge of absolute pressure in the intake manifold (MAP) Location of fuel system of cars with engines of 1.6 liters and 1.8 / 2.0 L
 | The gauge of absolute pressure in the intake manifold is a sensitive variable resistor. It measures the pressure in the intake manifold which varies depending on operating conditions of the engine and is converted into a voltage.
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The sensor is also used to measure atmospheric pressure at engine start and ensures operating conditions of the engine at different altitudes above sea level. The sensor is powered 5V Based on information from the sensor ECU adjusts the amount of fuel supplied to the engine and modifies the ignition timing. Check | - Connect a voltmeter between terminals 1 and 4 of the MAP sensor connector.
Track 1: "Weight"
Track 4: Positive voltage - Measure the voltage.
Output voltage with the ignition on and engine stopped: 4-5 In
The output voltage at a frequency of idling: 0.5-2.0 In - If the sensor output voltage is not correct, replace the sensor.
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The temperature sensor of air entering the engine (IAT) | | The temperature sensor of air entering the engine is integrated in the pressure sensor and a thermistor whose resistance varies with temperature. The ECM allows for the sensor signal and adjusts the pulse width supplied to the nozzle, thereby changing the amount of fuel supplied to the engine cylinders.
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Check sensor | - Measure the resistance between terminals 3 and 4 of the sensor connector.
Temperature | Resistance, Ohm | 0 ?� C | 4.5-7.5 | 20 ?� C | 2.0-3.0 | 40 ?� C | 0.7-1.6 | 80 ?� C | 0.2-0.4 |
- If the sensor resistance is not correct, replace the sensor.
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The coolant temperature sensor (ECT)  | The coolant temperature sensor is installed in the cylinder head and controls the coolant temperature signal and transmits the engine control unit ECM. The thermistor is used as a sensor which is sensitive to temperature changes. Electrical resistance of the thermistor decreases with increasing temperature.
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On cold engine ECM operates in open loop mode, whereby in the cylinder chamber is fed a richer air-fuel mixture and increases the idle speed. This continues until the motor has reached its normal operating temperature. Check |  | - Remove the sensor from the intake manifold.
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- By heating the vessel with water and placed it in tow, check its resistance.
Temperature | Resistance, Ohm | -30 ?� C | 22,22-31,78 | -10 ?� C | 8,16-10,74 | 0 ?� C | 5,18-6,60 | 20 ?� C | 2,27-2,73 | 40 ?� C | 1,59-1,281 | 60 ?� C | 0,538-0,650 | 80 ?� C | 0,298-0,322 | 90 ?� C | 0,219-0,243 |
- If the sensor resistance is not correct, replace the sensor.
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Setting | - Apply thread sealant LOCTITE 962T gauge or equivalent.
- Screw the sensor and tighten its moment given in the specification. Torque: 15-20 N ??? m.
- Connect the sensor connector.
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Throttle position (TP)  | Throttle Position Sensor - a variable resistor with the rotary axis of the throttle and transmits the information based on which the ECM determines when the throttle is closed, fully open or in intermediate positions.
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The sensor is rigidly connected to the throttle shaft. Depending on the throttle position sensor resistance changes. Check | - Disconnect the connector from the throttle position sensor.
 | - Measure the resistance between terminals 2 (w) and 3 (power) sensor connector. Resistance: 0,7-3,0 clod.
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- Connect an ohmmeter to terminals 2 (w) and 3 (sensor output) sensor connector.
- Slowly open the throttle and check that the resistance of the sensor changes smoothly in proportion to the throttle.
- If the sensor resistance is not correct, or change abruptly, replace the sensor. Tightening torque: 1.5-2.5 N ??? m.
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Camshaft position sensor (CMP)  | Camshaft position sensor generates pulses at TDC of first cylinder on the compression stroke on the basis of which the ECM calculates the sequence of the fuel injection system.
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Sensor crank angle (CKP)  | Sensor crank angle, and consists of a magnet coil and is located near the flywheel. The sensor transmits the ECM information on the crank angle (the position of the piston). Based on this information the output signal of the sensor, the ECM calculates the engine speed and crankshaft position.
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Check (1.6L I4) | - Disconnect the connector from the sensor crank angle.
 | - Measure the resistance between terminals 1 and 2 of the sensor connector. Resistance: 0,486-0,594 ohms at 20 ?� C.
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- If the sensor resistance is not correct, replace the sensor. The gap between the rotor and the sensor crank angle: 0.5-1.5 mm Torque: 9.11 N ??? m.
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The heated oxygen sensor (HO2S) Heated oxygen sensor determines the concentration of oxygen in the exhaust gas and converts a strain that transmits the engine control unit ECM. The output voltage of the sensor is 500 mV if the fuel mixture is richer in relation to the theoretical and the voltage is 100 mV if the fuel mixture is poorer (higher concentration of oxygen in the exhaust gas). Based on these data, the engine control unit changes the ratio of the fuel mixture in toplivnovozdushnoy. Check  | - Before testing the engine to warm up until the coolant temperature is equal to 80-95 ?� C.
- Accurate digital voltmeter to measure the output voltage of the sensor.
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|  | - Disconnect the connector from the oxygen sensor and connect a voltmeter to the oxygen sensor connector.
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- By varying the speed of the crankshaft of the engine, measure the oxygen sensor output voltage. If the sensor output voltage is not correct, replace the sensor. Torque: 50-60 N ??? m.
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