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Power supply system check
Preliminary checks | - Check the battery (see chap. Current care and maintenance and systems of electric motor).
- Check all fuses (see chap. Onboard electric equipment).
- Disconnect and re-Dock connectors all relevant electronic systems. Check the fixing of the connectors and wiring harnesses in the engine compartment.
- Check all connections are secure supply.
- Visually assess the condition of hoses and pipelines working path power system, paying special attention to the identification of cracks and other mechanical damages.
- Replace defective components, tighten slack choke connectors.
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System Checks Checking the tightness of the fuel path Checking the operating pressure in the fuel path | - Before turning off the ignition read the pressure gauge reading. If the result is less than 292.5 kPa, check the following:
- Checking the pressure developed by the fuel pump;
- Check fuel lines cross;
- Checking cross the fine filter;
- Checking the tightness of the pressure regulator;
- Leak test injectors.
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Checking fuel pump Check of serviceability of functioning Checking the tightness of the isolation valve | - The procedure is similar to the procedure described above to check the tightness of the fuel path with the only difference that the hose directly behind the nipple gauge connection is necessary when installing the last pinch.
- The amount of pressure that is stored in the cut-off portion of a fuel path for 5 minutes, should be 340 kPa. With a negative result, replace the fuel pump assembly. Do not forget to remove the jumper from the connector DLC.
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Checking the pressure developed by | - The procedure is similar to the procedure described above to check the tightness of the check valve of the pump assembly, with the only difference that the reading of the pressure gauge is made with the ignition.
- Replace defective pump (see. Section Removal and installation of the fuel pump).
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Check of the relay of the fuel pump ?�
Check of serviceability of functioning | - When the ignition switch should publish clearly audible click.
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Check conduction | - Remove relay (see chap. Onboard electric equipment).
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- Apply a voltage of 12 V at terminals ?��?�� 2 and 4 relay - between plugs ?��?�� 5 and 1/3 should be a conductivity. When removing the power conductivity should be absent.
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- Replace the faulty relay.
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Checks pressure regulator Check of serviceability of functioning | - Run the engine at idle and read the meter - the desired value of 235 kPa.
- Disconnect vacuum hose coming from the pressure regulator and repeat the measurement, - the required value of 292.5 kPa.
- Defective regulator Replace (see. Section Removal and installation of the fuel pressure regulator). Do not forget to remove the jumper from the connector DLC.
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Vacuum check Check injectors  | Leakage valve fuel injectors difficult when starting a warm engine. Damage to the injectors can be a cause of diesel effect when the engine continues to operate with the ignition off. |
Check of serviceability of functioning | - Make sure of reliability of fixing of the injectors in the fuel line, eliminates the possibility of bias in the performance test.
- Start the engine to idle and warm up to normal operating temperature.
- Do not turn off the engine, with a stethoscope to make sure of serviceability of functioning of each injector, - the presence of clicks indicates the serviceability of the opening and closing valves.
| In the absence of a stethoscope on hand check can be made to touch with a screwdriver or your finger. |
- If any of the injectors does not emit any sound, be sure of serviceability of giving him power and measure the electrical resistance.
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Check of power supply | - Visually assess the state of the injectors supplied to the wiring, and then make sure there is voltage at the terminals ?��?�� 16, 17, 34 and 35 pin ECM.
- Faulty injectors replace them (see. Section Removal and installation of the fuel injectors).
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Vacuum check Check the amount of fuel injection |  | - Push on the injector nozzle section of hose of suitable diameter and the second end lower volumetric capacity, connect the battery to the exclusive use tester (SST) and the injector to be checked. Defective injector should ensure flow of 130 cm 3 / min.
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- Replace faulty injectors (see. Section Removal and installation of the fuel injectors), - do not forget to replace the O-rings and lubricate them before installing the clean motor oil.
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Check the electrical resistance | - Disconnect from the obligation to verify the injector wiring.
 | - Using an ohmmeter, measure the resistance between the contact terminals of the injector. The desired result is 12 ÷ 16 ohms at 20 ?� C.
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- If necessary, replace the injector.
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Check of the valve of stabilization of turns of idling (IAC) Check of serviceability of functioning | - Start the engine and warm it up to normal operating temperature.
 | - Disconnect the wiring connector valve IAC, - should hand a distinct click, accompanied by an increase in engine speed to about 1000 per minute. If the engine speed does not change, check the winding resistance of the valve.
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Check resistance | - Make sure the ignition is off and the valve connector disunite.
 | - Using an ohmmeter, measure the resistance between the contact terminals of the connector - with a temperature of 20 ?� C, resistance between plugs ?��?�� 1 and 2 should be 18.5 ÷ 20.1 ohms between plugs ?��?�� 1 and 3 - 35.3 ÷ 36.9 ohms between terminals 2 and 3 - 16.0 ÷ 17.6 ohms.
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- Replace defective valve (see. Section Removal and installation of components of an inlet air path).
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Check throttle position sensor (TPS) Check of serviceability of functioning |  | - Disconnect the TPS wiring and plug between plugs ?��?�� 2 and 3 of the sensor connector ohmmeter.
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- Make a plot of the linearity of the sensor resistance on the position of the throttle. When fully closed throttle TPS resistance should be approximately 1 kW, with a completely open - about 2.4 ohms.
- Faulty sensor must be replaced, - do not forget in the same way to test replacement TPS.
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Check voltage | - Make sure that the dampers are in the fully closed position.
- Turn on the ignition.
- Connect a voltmeter between terminal number 1 and number 2 sensor connector.
- Make a line graph, depending on the position of the voltmeter readings throttle. When fully closed throttle measurement result should be 0.5 V, with a completely open - 4.1.
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Check sensor measuring the mass of air (MAF) | - Warm up the engine to normal operating temperature and let it run at idle.
 | - Connect a voltmeter between ground and terminal number 4 (red-green wire) sensor connector and read his testimony - the desired value of 0.8 ÷ 1.2 in.
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- Raise the engine speed - reading voltmeter must change, rising to a value of 3.5 ÷ 4.
- Faulty sensor must be replaced.
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Check the coolant temperature sensor (ECT) |  | - ECT sensor is placed near the thermostat - disconnect the wiring from the sensor.
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- Remove the ECT sensor and place it in a container of water.
 | - Using an ohmmeter, measure the resistance between the contact terminals of the sensor connector. The required value of 2.45 ?� 0.24 ohms at 20 ?� C, and 0.322 ?� 0.032 ohms at 80 ?� C.
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- Faulty sensor must be replaced.
- Installation is performed in reverse order - do not forget to replace the washer, make sure that the sensor has been tightened with demanded effort (25 ÷ 29 Nm).
- Finally, start the engine and check for signs of coolant leaks.
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Checking the intake air temperature sensor (IAT) | - Switch off the ignition.
- Disconnect the IAT sensor wiring and use an ohmmeter to measure the resistance between the number 1 and number 2 sensor connector, - the required value is 2.21 ÷ 2.69 ohms at 20 ?� C.
- Replace Faulty sensor - do not forget to install sealing washer, track reliability snaps into place.
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Check the main relay | - Remove the cover on the right of the engine compartment main fuse box mounting (see chap. Onboard electric equipment).
 | - Pressing a finger to the main switch, make sure it properly snaps when the ignition - use the help of an assistant. The relay should click and also when the ignition.
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- Remove the relay from its landing nest and feed the battery voltage between terminals number 86 () and 85 (-) relay. Make sure available conductivity between plugs ?��?�� 03 and 87 - when the power conductivity should be absent.
- Fault relay must be replaced. Track reliability of the lid snaps into the mounting block.
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