- multimeter (in voltmeter and ohmmeter mode);
- wire (1.5-2 m);
- insulating tape.
Examination
1. Prepare the car for work (see "Preparing the car for maintenance and repair").
2. Remove the decorative engine cover (see "Engine trim panel - removal and installation").
3. Disconnect the injector wiring harness connectors.
4. After turning on the ignition, use a voltmeter to measure the voltage at the power terminal E of connector 1 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").
After completing the voltage measurement, turn off the ignition.
Note: If the 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.
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5. We check the electrical resistance of the injectors, for which we use an ohmmeter to measure the resistance between terminal E and the other four terminals of block 2. 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. Serviceable injectors should have a resistance of 13 Ohms.
6. Using two wires directly from the battery, apply 12 V to the terminals of connector 2 - connect terminal E to the positive terminal of the battery, and terminals B, C, G and F in series with the negative terminal of the battery. If the injector is in good working order, a characteristic click should be heard when the valve opens.
7. Replace faulty injectors.
Removal
1. Remove the fuel rail (see "Fuel rail - removal and installation").
2. Disconnect the wiring harness connectors from the injectors (the photo shows a view from the radiator side).
3. Remove the injector retainer from the fuel rail.
4. Remove the injector from the ramp.
5. Similarly, remove the three remaining injectors.
Installation
We install the injectors in the reverse order.