Engine Crankshaft Position Sensor mounted at the rear of the cylinder block inside the engine (opposite the rear journal of the crankshaft) on the rear crankshaft oil seal, which has a special design.
The sensor wiring harness connector is located at the rear of the engine block (behind the starter).
If a fault occurs in the crankshaft position sensor circuit, the engine stops running, the ECU stores a fault code in its memory and turns on the warning light in the instrument cluster.
You will need a 4 mm Allen key.
1. Disconnect the wire from the negative terminal of the battery.
2. Squeeze the sensor wiring harness connector lock…
3. …and disconnect the harness from the sensor connector block.
4. Remove the connector block from the holder on the engine and unscrew the bolt securing the wiring harness seal to the cylinder block (shown by arrow).
5. Remove the gearbox (see Removal and installation the gearbox).
Note: When removing the gearbox, the starter is removed.
6. On a vehicle with a manual transmission, remove the clutch (see Removal and installation the clutch).
7. Remove the flywheel (see Removal, defect detection and installation of the flywheel).
8. Remove the bolt securing the sensor to the rear crankshaft oil seal…
Note: Shown with engine removed for clarity.
9. …and, having disconnected the sensor from the oil seal, remove it, extracting the seal of the sensor connecting block from the wall of the cylinder block.
10. Install the parts in the reverse order of removal.
Note: Pay attention to the marking of the sensor. Purchase a new sensor with the same marking.
Camshaft position sensors (phase sensors) are installed on the rear end of the cylinder head. If there is a fault in the circuit of one of the sensors, the ECU stores a fault code in its memory and uses a bypass engine control program (without changing the valve timing).
You will need: TORX E10 socket head, flat-blade screwdriver.
1. Disconnect the wire from the negative terminal of the battery.
2. Pull out the lock of the sensor wiring harness connector…
3. …squeeze the latch…
4. …and disconnect the connector from the sensor.
5. Unscrew the sensor mounting bolt…
6. …and remove the sensor from the hole in the cylinder head.
7. Pry it off with a screwdriver..
8. …remove the rubber sealing ring from the sensor.
Note: Replace the camshaft position sensor sealing ring with a new one each time the connection is disassembled.
9. Install the parts in the reverse order of removal.
Knock sensor attached to the top of the cylinder block.
You will need a TORX E12 socket head.
1. Disconnect the wire from the negative terminal of the battery.
2. Press the spring clip of the knock sensor wiring harness connector…
3. …and disconnect the connector from the sensor.
4. Use a socket head to loosen the bolt securing the sensor to the engine cylinder block…
5. …and, having unscrewed the bolt by hand, remove the knock sensor.
6. Install the knock sensor in the reverse order. Tighten the sensor mounting bolt to 20 N·m.
Temperature and mass air flow sensor installed in the air filter housing.
You will need a Phillips-head screwdriver.
1. Disconnect the wire from the negative terminal of the battery.
2. Squeeze the sensor wiring harness connector clips…
3. …and disconnect the connector from the sensor.
4. Remove the two screws securing the sensor…
5. …and remove the sensor from the air filter housing.
6. Install the parts in the reverse order of removal.
Oxygen Concentration Diagnostic Sensor are replaced in the following order.
You will need a 22 mm wrench.
1. Disconnect the wire from the negative terminal of the battery.
2. Squeeze the HO2S diagnostic harness connector retainer and disconnect it from the engine harness connector.
3. Loosen the sensor tightening…
4. …and unscrew the sensor from the inlet pipe.
5. Install the oxygen sensor in the reverse order of removal.
Coolant temperature sensor, installed in the lower part of the right tank of the cooling system radiator, is replaced in the following order.
You will need a 21 mm wrench.
1. Disconnect the wire from the negative terminal of the battery.
2. Drain the fluid from the engine cooling system (see Replacing the coolant).
Note: When replacing the sensor, you don't have to drain the coolant: after removing the sensor, plug the hole with your finger or a plug - the loss of coolant will be minimal.
3. Press the locking tab of the coolant temperature sensor wiring harness connector…
4. …and disconnect the connector from the sensor.
5. Loosen the sensor with a wrench…
6. …and unscrew it from the radiator tank hole.
Note: Please note that the sensor is sealed with a shaped copper ring. Replace the ring with a new one each time the sensor is removed.
7. Cool the sensor to the ambient temperature. Connect the tester in ohmmeter mode to the sensor terminals and measure its resistance. Measure the current air temperature with a thermometer and compare the obtained values with the data in Table 1. If the resistance deviates from the norm, replace the sensor.
8. To measure the resistance at the sensor terminals at different temperature conditions, lower the sensor into hot water and check the change in its resistance as the water cools, monitoring the water temperature with a thermometer. The nominal resistance values at different temperature values are given in Table 1.
Table 1. Data for checking the coolant temperature sensor
Air temperature, °C | Resistance, kOhm |
–20 | 13–17 |
0 | 5,3–6,7 |
20 | 2,3–3,0 |
40 | 1,0–1,5 |
60 | 0,56–0,76 |
80 | 0,3–0,42 |
9. If the resistance deviates from the norm, replace the sensor.
10. Screw in the coolant temperature sensor and tighten it to a torque of 12 N·m.
11. Connect the wiring harness connector to the sensor.
12. Fill with coolant.
Coolant temperature sensor, installed on the thermostat module, is a non-separable unit with a thermostat cover. If the sensor fails, the cover or the thermostat together with the cover is replaced, depending on the design of the thermostat of a specific engine model (see Removal and installation the thermostat).
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