- multimeter (in voltmeter and ohmmeter mode);
- wire (1.5-2 m);
- insulating tape.
Sequence of execution
1. Prepare the car for work (see "Preparing the car for maintenance and repair"), turn off the ignition. With engine 11183 (1.6i) remove the decorative trim (see "Decorative engine trim 11183 (1.6i) - removal and installation").
2. Disconnect the connectors (1) and (2) of the injector wiring harness.
3. After turning on the ignition, use a voltmeter to measure the voltage at the power terminal E of the connector (2) of the wiring harness, which should be no less than 12 V (the terminals are marked with letters on the connector, the "minus" probe of the device should be connected to the engine "ground").
Warning! After completing the voltage measurement, turn off the ignition.
Note: If voltage does not reach the connector or is less than 12 V, the battery is discharged, the power supply circuit is faulty, or the ECU is faulty.
4. Check the electrical resistance of the injectors, for which we use an ohmmeter to measure the resistance between terminal Ε and the other four terminals of the block (2) one by one. The terminal of the block marked with the letter B corresponds to the injector of the first cylinder, and terminals C, G and F correspond to the injectors of the second, third and fourth cylinders, respectively. The resistance of serviceable injectors should be 13 Ohms.
Warning! When performing the following operation, do not apply more than 12 V to the terminals of the connector and do not leave the terminals under voltage after performing the check, as this may lead to burnout of the injector windings.
5. Using two wires directly from the battery, briefly apply 12 V to the terminals of the block (2) - terminal E is connected to the positive terminal of the battery, and terminals B, C, G and F are connected in series with the negative terminal of the battery. A serviceable injector should produce a characteristic click when the valve opens.
6. Replace faulty injectors (see "Fuel rail of engine 2111 (1.5i) - removal, disassembly and installation" or "Fuel rail engine 11183 (1.6i) - removal, disassembly and installation").