To find out why the car does not start when engine is cold, it is necessary to inspect its main components and assemblies to identify the causes of failure and eliminate them. We check the wires and terminals. This diagnosis should be performed with a partner: He should keep the key in the ignition in the position of "starter", you are at this moment arms with a force trying to move the connection terminals. In places where there are sparks, the connection must be restored. The fact that any of the wiring is intact, if there is suspicion of a cliff, you can verify by connecting in parallel inspected the wire second, defective. If the central chain is cut, then when the second parallel-connected wires, and when the starter can be seen sparkle. The more significant defective contact at the terminals of the battery when starting a diesel engine, due to lower speed starter. You may notice that running diesel engine with a discharged battery by "lighting a" in most cases, you can not: because of the significant losses in the wires "cigarette lighter", as well as in the joints of the wires from the battery terminals. Check the battery. Should know enough battery power to operate the starter car with the correct speed. To do this, before turning the starter switch on the ceiling, illuminating the interior of the vehicle. If while turning the key in the position of "starter" light goes off (and also went out glowing lights on the dashboard), this suggests that the capacity of the battery for starting the engine is not enough. Of course, if you have a hydrometer, and the load forks can establish a more accurate diagnosis of the battery. In practice, it is enough to turn car's headlights when the lights on the cabin. If the brightness of the ceiling fell, remove the battery and assign it to the service. Check the retractor relay. For the following diagnosis, to find out why the car does not start when engine is cold, you need to take the wire with insulation, a length of 1 - 1,5 m, and, after removing the connector from the relay, connect this wire "+" battery with output relays. If the retractor relay correctly, the engine must rotate the starter. Check the ignition. To check the flaps should be removed from the panel of the steering mechanism, including the position of "starter", and explore, as well as connectors and move all the contact group. The pilot light will help determine whether to reach the contact group pressure - here it should come with turning the key in the position of "starter". In order to repair the contact group, it should be removed without removing at the same time the ignition. If there is difficulty in loosening 2 bolts with a spherical cap smooth, use a small chisel, made of anchors (the nail), tap or debris from the drill. Check the fuses. Fuses, which relate to the work of the motor, are usually located under the hood of the car next to the battery. The main attention should be paid to safety lines ((Fusible link), check their reference light. With Fuse, 60A and 80A power, remove the transparent cap, and also diagnose the control bulb. Check starter. In order to check the starter, not because it is car does not start when engine is cold, it is desirable to first remove and dismantle. In the car starter in Japan, as a rule, failures occur due to aging and the presence of lubricating mud. Once the starter was dismantled, checks and proshlifovyvaem collector, "expenses" in brush holder brush, remove the old grease in the gear and bearings, then lay the new grease. Attention is drawn to the front bearing a starter. Often, it was he who breaks first, and therefore the starter loses its power, so that this bearing is desirable to re-manufacture. If you believe that the cause of the problem - "Bendix", know that for sure in the overrunning clutch has penetrated the dust, and it is with the former grease does not allow the rollers to move freely. Try this "Bendix" boil in a pot of machine oil, maybe he's still some work. If the boil has not brought results, try to repair the "Bendix". chisel razvaltsovyvaem cabinet, and then dismantle it. Broken springs is recommended to re-do or stretch the wreckage. Corpuz, who razvaltsevali, it is better to replace the new, because with such a repair can not do without a lathe . Check sensor start-up and start injector. For the diagnosis should be removed from the engine start injector, then again, it connects to the fuel tube and wire, sending a trigger to the side of the injector wires. On some motors can be removed Breather, located in front of the throttle, and fully opening Last, to test the injector, then turn the starter. Through the hole start injector will fly the jet fuel, instantly transformed into the mist. If we continue to hold the ignition key to position "starter" after a certain period of time, jet fuel stops. The period of the fuel injection period is determined by heating a bimetallic plate sensor cold start, it heats up, passing through the injector current. This plate can warm up and heat from the engine coolant, that is, if the engine is hot, the injector may still not work. diagnose any injector in the following ways: through a tube in his mouth blast gasoline injector. Since the end of the injector should not drip. When a voltage 2-wire from the battery (polarity at the same time, any) from the end of the injector should leak thin stream, such as from a syringe. Check the position of the choke carburetors. Cold car - the engine is not zavedetsya when not fully closed choke. It often happens that the carburetor due to dirt jammed damper device installed in the position which is required to run a car engine. In addition, sometimes the motor car will not start because the shutter opens the secondary chamber of the carburettor . Why do hot car engine will not start? Again, the air damper is closed. Check the timing belt. Perhaps the most simple diagnostics, why not auto start when the engine is cold. So, we remove the cover from the timer, and cranking the key in the ignition switch to position "start" . Of course, the main cable that goes from the ignition coil should be grounded. If the main wire is not, then sever any wiring harness coming from the timer. If the motor is rotated, and "Runner" is in place, probably need to replace the timing belt. But first try to scroll "thumb" with his fingers. If you get this, it is likely a belt, and the fault lies in the fact that the pin was cut off, which is in the drive timer. And in general, would be better if connected strobe, and rotating engine clearly see the markings on the flywheel while giving spark. After this test, you'll be absolutely confident in the correctness and accuracy of the timing belt assembly.
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