Camshaft position sensor for 1.0l, 37kW and 1.4l, 50kW engines
1 - connecting block; 2 - sensor
The camshaft position sensor sends a signal to the engine control unit about the ignition timing in the first cylinder. If the sensor fails, the control unit switches to a backup program, in which the ignition timing decreases slightly and a spark between the electrodes of the candles jumps simultaneously in all four cylinders with each revolution of the crankshaft.
Examination
1. Disconnect block 1 (see fig. Camshaft position sensor for 1.0l, 37kW and 1.4l, 50kW engines) with wires from the camshaft position sensor 2.
2. Turn on the ignition. Connect a voltmeter to pins 1 and «mass» connecting block of the sensor, then to contacts 2 and «mass». In both cases, the voltmeter should show a voltage of about 5 V.
3. Then connect a voltmeter to pins 3 of the block and terminal «+» battery. The voltmeter should show battery voltage.
4. Otherwise, check the wires for breaks and short circuits.
5. If there is no open or short circuit in the wires, and the voltmeter shows the voltage indicated above, replace the camshaft position sensor.
6. If there is no open or short circuit in the wires, and the voltmeter shows 0, replace the engine control unit.