Determine the car start failure, first understand the battery situation

According to battery.com.cn, if the engine is in normal condition, the starter or battery failure will make the engine difficult to start or even start. In this case, first understand the use of the starter and the battery, in order to roughly determine the fault location. If the battery has been used for more than one year, it should be checked for technical conditions. If the battery is used for a short period of time and the starter has not been repaired for a long time, it should be checked from the starter. Then analyze and process according to the fault phenomenon at startup:

1. When starting, only the “giggle” sound of the electromagnetic switch of the starter is heard, or the starter drives the crankshaft to rotate slowly for a few times, and then the starter electromagnetic switch “giggle” sounds, but the crankshaft does not rotate. This phenomenon generally belongs to the battery "breaking grid" fault.

2. Temporary parking can be started every time, but the parking time is longer or the cranking can only be turned when starting the next day. This phenomenon is caused by serious self-discharge of the battery, and the plate and the separator are seriously deteriorated, indicating that the battery is near scrapped.

3. When starting, the starter suddenly turns weak, and it is accompanied by burning rubber smell or smoke from the battery. Most of them are pole piles and pole pile clamps are badly contacted and burnt.

4. If the starter drive gear and the engine flywheel ring gear make a idling sound when starting, there are two reasons: one is the deformation of the meshing cutting plane of the flywheel ring gear; the other is that the gap between the starter drive gear and the flywheel ring gear is too large. . The two cannot mesh and the engine will not start.

5. When the main power switch is turned on, the starter drive gear is meshed with the flywheel ring gear. This kind of failure occurs. First, the holding coil of the starter electromagnetic switch is connected to the power supply terminal. Second, the three wires on the key switch are connected incorrectly. The judgment method is: when the key is in the “0” position, the starter drive gear is started. If it does not turn, start the motor drive gear to rotate with the flywheel ring gear when it is in the "2" position.

6. When the start switch is turned to the starting position, the engine cannot be started, and there is no other phenomenon. The fault is that the key and the switch are not connected to the starting circuit due to wear; the second is that the starter relay is not turned on to the starter electromagnetic switch circuit; and third, the power switch is not turned on.

7. There is only a slight “beep” at the start, and there is no response. This is caused by the start relay issuing. At this time, just press the tail of the electromagnet and force the electromagnet to move forward to turn on the start circuit and start the engine.

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