NOTE: The sensor replacement procedure is shown on a vehicle with a Duratec Ti-VCT engine. On vehicles with other engines, the procedure is similar, although the location and number of sensors may differ.
Crankshaft position sensor the engine is installed at the rear of the engine cylinder block opposite the flywheel.
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. In this case, check the sensor for proper operation.
You will need: an 8 mm socket head and a tester.
1. Disconnect the wire from the negative terminal of the battery.
2. Squeeze the latch…
3….and disconnect the wiring harness connector from the crankshaft position sensor terminals.
4. Unscrew the sensor mounting bolt…
5….and remove the sensor from the hole in the cylinder block.
6. Use a tester to measure the resistance between the sensor terminals. The nominal resistance value should be within 0.5–0.6 kOhm. If the resistance does not meet the specified limits, replace the sensor.
7. Install the engine crankshaft position sensor in the reverse order of removal.
Camshaft Position Sensor is installed on top of the cylinder head. If there is a fault in the sensor circuit, the ECU stores a fault code in its memory and uses a bypass control program.
You will need: a 10 mm wrench, a tester.
1. Disconnect the wire from the negative terminal of the battery.
2. Remove the decorative engine cover (see Removing and installing the decorative engine cover).
3. Squeeze the retainer and disconnect the wiring harness connector from the sensor.
4. Unscrew the mounting bolt…
5….and remove the sensor from the hole in the cylinder head.
6. Use a tester to measure the resistance between the sensor terminals. The nominal resistance is 0.5–0.6 kOhm. If the resistance does not correspond to the specified range, replace the sensor.
7. Install the camshaft position sensor in the reverse order of removal.
Coolant temperature sensor is installed in the coolant distributor housing, located on the cylinder head on the gearbox side. In the event of a sensor failure, the ECU stores a fault code in memory and uses a bypass engine control program (calculates an approximate coolant temperature based on engine operating time and absolute air pressure in the intake manifold).
The resistance at the sensor terminals is checked under different temperature conditions.
You will need: a 19 mm wrench, a tester, and a thermometer.
1. Disconnect the wire from the negative terminal of the battery.
2. Drain the fluid from the engine cooling system (see Replacing the coolant).
USEFUL TIP: 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 release button to disconnect the wiring harness connector from the coolant temperature sensor.
NOTE: For clarity of photography, the ignition coil has been removed from the engine and the hoses have been disconnected from the coolant distributor pipes.
4. Pry it up with a screwdriver…
5….and remove the spring retainer of the sensor.
6. Remove the temperature sensor from the coolant distributor hole.
NOTE: The temperature sensor is sealed in the coolant distributor hole with a rubber ring. When installing the sensor, replace the ring with a new one.
7. Connect the tester to the sensor terminals and measure the resistance, and measure the current temperature with a thermometer.
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 of a working sensor is indicated in Table.
10.6. If the resistance deviates from the norm, replace the sensor.
9. Install the coolant temperature sensor in the reverse order of removal.
10. Fill with coolant.
The combined absolute pressure and intake air temperature sensor is installed in the intake manifold.
If the sensor is faulty, the ECU stores a fault code in its memory and uses a bypass engine control program (calculates the approximate absolute air pressure in the intake manifold based on the crankshaft speed and throttle position).
You will need a TORX T20 key.
1. Disconnect the wire from the negative terminal of the battery.
2. Press the latch..
3….and disconnect the wiring harness connector from the sensor.
4. Remove the fastening screw…
5….and remove the sensor from the intake pipe hole.
6. Install the new sensor in the reverse order of removal.
Throttle Position Sensor built into the throttle body cover, so if the sensor fails, replace the throttle body assembly (see Removing and installing the throttle assembly).
Oxygen concentration control sensor is installed in the threaded hole at the inlet to the catalytic converter. If the sensor is faulty, the toxicity of the exhaust gases may increase sharply, and fuel consumption may increase.
You will need a 22 mm wrench…
…it is more convenient to use a special split key, similar to those shown in the photo.
1. Disconnect the wire from the negative terminal of the battery.
2. Remove the decorative engine cover (see Removing and installing the decorative engine cover).
3. Squeeze the oxygen sensor wire harness connector retainer.
4….and disconnect the block.
5. Remove the heat shield of the catalytic converter (see Removing and installing heat shields).
6. Install the key on the sensor, loosen the sensor..
7….and unscrew the control oxygen concentration sensor.
8. Install the new oxygen sensor in the reverse order of removal.
Oxygen Concentration Diagnostic Sensor installed in the threaded hole at the outlet of the catalytic converter. If the sensor is faulty, the toxicity of the exhaust gases may increase sharply, and fuel consumption may increase.
You will need a 22 mm wrench (or a special socket wrench).
1. Disconnect the wire from the negative terminal of the battery.
2. Squeeze the latch…
3….and disconnect the diagnostic oxygen concentration sensor wiring harness connector.
4. Loosen the sensor clamp and remove it from the exhaust manifold.
5. Install the sensor in the reverse order of removal.
Knock sensor is attached to the cylinder block wall in its upper part under the intake manifold in the area of the 3rd cylinder. If the sensor fails, the ECU stores a fault code in its memory and uses a bypass engine control program (with a reduced ignition timing angle to prevent detonation).
You will need a 13 mm wrench.
1. Disconnect the wire from the negative terminal of the battery.
2. Remove the intake pipe (see Replacing the intake manifold gasket).
3. Disconnect the wiring harness connector from the engine cylinder block, overcoming the force of the retainer.
4. Squeeze the latch…
5….and disconnect the knock sensor wiring harness connector.
6. Remove the bolt securing the knock sensor to the cylinder block…
7….and remove the sensor.
8. Install the knock sensor in the reverse order of removal.
For more information, please visit the website [Fordbook.ru]