Before checking, make sure that the No. 35 fuse is not blown, the wire connecting the motor to «weight», not broken or oxidized, the battery is charged (minimum voltage 11.5 V), the fuel pump relay has failed. For engines 1.4l, 55 and 74 kW, in addition, check that the following are not out of order: the crankshaft speed sensor and the camshaft position sensor.
1. Remove the upper engine cover (see subsection 2.1).
2. For engines of 1.4 l, 55 and 74 kW, disconnect the block with wires from the ignition module.
3. Disconnect the wire blocks from the injectors.
4. Connect an electrical voltage indicator with a LED to the terminals of block 1, disconnected from injector 2 of the first cylinder (3 - voltage indicator with LED).
5. Turn the engine over with the starter, and the LED should flash. This means that power is being supplied to the injector. Check the other injectors in the same way.
6. If the diode does not flash when cranking the engine, connect a voltage indicator to pin 1 of the block (2 - second contact), disconnected from the nozzle of the first cylinder, and to «mass» (a - engines 1.0 l, 37 kW and 1.4 l, 50 kW; b - engines 1.4 l, 55 and 74 kW). Turn the engine over with the starter, the LED should flash; if it does not flash, check the wires for an open or short circuit. Check the other injectors in the same way.
7. If there is no open in the wires, check the resistance of the injectors. To do this, connect an ohmmeter to the injector contacts and measure the resistance. For engines 1.0 l, 37 kW and 1.4 l, 50 kW, it should be 14-20 ohms; for engines 1.4 l, 55 and 74 kW - 14–17 Ohm (at 20°C, with a warm engine, the resistance is higher by about 4–6 ohms). If the resistance is not as specified, replace the injectors.