It is normal that you can't step on the brakes before you get to the car. This is the working state of the brake system booster. Brake is a device with the function of slowing down, stopping or maintaining the stopped state of moving parts (or moving machinery). It is a mechanical part that stops or slows down the moving parts in the machine. The classification of brakes is as follows: 1. Throttle control braking: When deceleration is required, ...

Tiida won't start, and the brakes won't go down.

It is normal that you can't step on the brakes before you get to the car. This is the working state of the brake system booster. Brake is a device with the function of slowing down, stopping or maintaining the stopped state of moving parts (or moving machinery). It is a mechanical part that stops or slows down the moving parts in the machine. The classification of brakes is as follows:

1, throttle control braking: when it is necessary to slow down, keep the third gear and completely release the throttle. At this time, the engine tends to idle, so it produces a resistance to the transmission system and acts on the wheels to achieve the purpose of slowing down;

2. Exhaust braking: There is a butterfly valve at the joint of exhaust manifold and exhaust pipe of high-power diesel engine. When the gear is engaged, the electromagnetic switch is operated to close it, causing the engine to jam to achieve the braking effect, and it will automatically open when stepping on the accelerator again;

3. Hydraulic turbine reducer: A turbine chamber is added at the rear end of the gearbox housing. When the braking circuit is connected, the gearbox oil will be damped in the turbine to achieve the braking effect, without wear but with increased heat dissipation;

4. Electric turbine reducer: it is equivalent to installing a "generator" on the transmission shaft. When there is no electricity, there is no contact and no wear. When the circuit needs braking, the transmission shaft will be resisted by electromagnetic field to achieve the purpose of braking;

5. Engine braking structure: the braking signal makes the exhaust valve slightly open but not closed, and the piston moves up and down to generate braking force due to airflow damping. Where is the Tiida crankshaft position sensor?

Tiida crankshaft sensor is located behind the engine cylinder block, above the ball cage in the right half shaft and below the exhaust pipe, and is covered by an iron cover. Crankshaft position sensor is one of the most important sensors in engine electronic control system. It provides ignition timing (ignition advance angle) and signals to confirm crankshaft position, and is used to detect piston top dead center, crankshaft angle and engine speed. The following are the relevant forms of crankshaft sensor:

1, magnetic pulse crankshaft position sensor, installed behind the pulley at the front end of the crankshaft, with a thin circular toothed disc (called signal disc) at the rear end of the pulley, installed on the crankshaft together with the crankshaft pulley and rotating with the crankshaft;

2. The photoelectric crankshaft position sensor is installed in the distributor, which consists of a signal generator and a signal disk with notches and light holes. The light-emitting diode is used as the signal source, which rotates with the rotor. When the light-emitting hole is aligned with the light-emitting diode, the light shines on the phototransistor to generate an electrical signal, which is amplified by the amplifier circuit and transmitted to the ECU；.

3. The Hall-type crankshaft position sensor uses the principle of Hall effect to generate voltage pulse signals corresponding to the crankshaft angle. It uses trigger blades or gear teeth to change the magnetic field intensity passing through the Hall element, so that the Hall element generates a pulsed Hall voltage signal, which is amplified and shaped as the output signal of the crankshaft position sensor. Tiida can't start, and the brakes can't be pressed @20 19.