Toyota overbearing 2700 strives to strike a fire.

First, common faults of low-voltage circuits

1, battery is insufficient; Poor or chaotic wire connection; Poor battery grounding; The distributor or Hall sensor is damaged; The ignition switch is damaged or poorly wired; The transistor ignition control unit is damaged or poorly wired.

2. The fault diagnosis method of low-voltage circuit mostly uses ammeter or voltmeter to check line by line to eliminate fault points.

Second, the common faults of high voltage circuit

1, high voltage line falls off or leaks; Damage and fracture of distributor cover; Ablation, breakage and damage of distributor head; The gap between spark plug electrodes is too large or too small; Excessive carbon deposition in spark plug; Spark plug insulator is damaged; The ignition coil is damaged or the wiring falls off.

2. High-voltage circuit failure mostly adopts high-voltage fire test method, that is, unplug the high-voltage line in the distributor center or a cylinder, put the thread end 3-6mm away from the cylinder, and start the engine fire test. There is a spark and the spark is strong, indicating that the ignition system is working normally.