The details of the fault code P2312 are as follows:
The system scope of the fault: ignition system
Applicable models: All car manufacturers
Chinese meaning explanation: Ignition coil E primary control circuit voltage is low
P2312 fault code related knowledge:
1. The position and function of the ignition coil on the car: A).- - Generally installed on the cylinder head. B). The ignition coil converts the low-voltage electricity of the primary winding into the high-voltage electricity of the secondary winding, and discharges it through the spark plug A spark is generated that ignites the fuel-air mixture in the cylinder.
2. Types and structural principles and effects of ignition coils:
A). The ignition coil converts the low-voltage electricity of the primary winding into the high-voltage electricity of the secondary winding, and generates a spark through the spark plug discharge, which ignites the fuel-air mixture in the cylinder. Under normal circumstances, the ignition coil generates a relatively large amount of heat when it is working, but if the temperature of the ignition coil is too high, the resistance of the ignition coil will increase.
B). When the engine is started, the crankshaft position sensor sends the engine speed signal to the ECU. The ECU starts to calculate the ignition and fuel injection information after receiving the signal. If the system cannot receive the speed signal (crankshaft position)
The sensor is damaged, the sensor circuit is faulty), the ECU will not control the ignition coil to start holmium, and the engine cannot run.
C). It will cause failure to start, lack of cylinders for the engine, etc.
Analysis of the meaning of the failure:
1. Fault code explanation The function of the ignition coil is to convert the 12-volt voltage of the car battery into the thousands or even tens of thousands of volts required for spark plug ignition. There are two sets of coils in the ignition coil, the primary coil and the secondary coil. The primary coil has thicker enameled wire with fewer turns; the secondary coil uses thinner enameled wire with relatively more turns. When the primary coil is connected to the power supply, a strong magnetic field is generated around as the current increases, and the iron core stores the magnetic field energy; when the switching device disconnects the primary coil circuit, the magnetic field of the primary coil decays rapidly, and the secondary coil A high voltage will be induced. The Electronic Control Unit (ECU) continuously monitors each ignition main circuit. If the ECU detects that the voltage of the primary control circuit of the ignition coil is lower than a certain value, this fault code will appear.
Detailed reasons and solutions:
1. Cause of failure
A). Whether the outer surface of the ignition coil is dirty, damp, aged or damaged, and the connection with the high-voltage line is
Whether it is firm and reliable;
B). Whether the battery voltage is abnormal;
C). Whether the spark plug is faulty;
D). Whether the ignition coil and its lines have short circuit, open circuit and poor contact;
E). Whether the sensor affecting ignition control is abnormal (such as knock signal, crankshaft position signal, camshaft position signal, etc.);
F). Whether the ECU is faulty
2. Processing method:
A). Whether the outer surface of the ignition coil is dirty, damp, aged or damaged, and the connection with the high-voltage line
Whether the connection is firm and reliable; if there is dirt, clean it up. If the fault is not resolved or there are other faults, please consult a professional technician.
B). The outer surface of the ignition coil should be kept clean and should be protected from moisture to maintain its good insulating properties. The connection between the ignition coil high voltage lead-out screw and the high voltage wire should be firm and reliable. If the connection is loose, the discharge flashover is easy to occur, which will burn the connection part. When the ignition coil is dirty or damp, it should be cleaned in time. If the ignition coil is damaged or abnormal, it should be replaced in time.
