Buick Luzun fault code C0035 right rear wheel speed sensor circuit open circuit or short circuit?

1. Measure whether the sensor itself (the old electromagnetic type, the internal resistance is about 1500, the **Hall type, the internal resistance is infinite) is not faulty (the failure rate is higher), 2. Check the relevant signals (the electromagnetic type is the AC voltage signal, which increases with the increase of vehicle speed, and the Hall type is the DC square wave signal, the voltage is stable, but the waveform frequency will change);

3. Measure whether there is a fault in the relevant line (whether there is a short circuit or an open circuit, and the line is directly from the control unit. Hall type is active, there is a 5V power supply, the other is a tie-iron electric signal (ground carrier), and the electromagnetic type has no power supply voltage line (passive).

Summary. Hello, dear. Here are the answers to your questions:

Buick Luzun crankshaft sensor performance failure? In the case of normal situations in this situation, do you need to check if the crankshaft sensor itself is faulty? If there is no fault, the corresponding wiring is checked.

Hello, dear. The question you asked, here is the answer for you: Buick Luzun crankshaft sensor performance failure?

In this case, if the combustion is normal, do you need to check whether the crankshaft sensor itself is faulty? If there is no fault, then the corresponding line is checked and sold to the mold.

Hello, my 12-year-old Buick Luzun is always weak to refuel, the engine fault light is on, the spark plug is replaced, the curved oak shouts the alarm, the gasoline seepage filter, the gasoline pump, or the beam cover, what should I do.

Have you been matched after the replacement?

I don't know, and the repairman didn't say it, but the fault always exists, and the feeling of driving piers is particularly serious.

If this is the case, it is recommended that you check it first, because the replacement of these brigade yard holes with dismantling parts needs to be matched through the 431 system or the Daodaotong system.

In addition, if you feel a very bad stuttering while driving, it is probably caused by serious carbon deposits in the cylinder, and it is recommended that you clean the carbon deposits and valves.

At first, the prompt was the failure of the curved sensor, and then the mixture was too thin, and the repairman said that the pressure of the gasoline was not enough, and the change of the gasoline pump did not solve the problem.

First of all, you need to determine whether it has been matched by a computer, and if it has not been matched by a dedicated system, it is recommended to match.

If you are sure that there has already been a match. Since it will indicate that the crankshaft sensor is faulty. You can't go wrong with a normal car. It should be that there is a line that does not answer the good or false connection behavior, and it is recommended that you enter the town to lift the oak line for inspection.

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Dear, you have a good dinner, I am happy to answer for you! Luzun crankshaft position sensor circuit fault The line of the crankshaft position sensor is close to the exhaust pipe of Jelvant Silver, and it is necessary to check whether the circuit of the sensor is aging and the contact is not good.

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Q: 09 Buick Luzun 30 engine common faults: 1Engine stalling: It can be caused by ignition system failure, fuel system failure, electronic control module failure, air flow beam sensor failure, etc.

2.Unstable engine operation: It can be caused by unbalanced cylinder pressure, air intake system leakage, fuel system failure, ignition system failure, etc.

3.Increased engine fuel consumption: It can be caused by a faulty fuel injector, a faulty intake system, a faulty ignition system, a faulty oxygen sensor, etc.

4.Difficulty in engine starting: It can be caused by low battery power, ignition system failure, fuel system failure, insufficient cylinder pressure, etc.

5.Increased engine noise: can be caused by incorrect valve clearance, worn valve guide sleeves, worn piston rings, etc.

6.Engine Shake: It can be caused by ignition system failure, intake system failure, fuel system failure, cylinder pressure imbalance, etc.

7.Engine stall: It may be caused by a faulty air flow sensor, a faulty oil pump, a blocked fuel filter, etc.

8.Engine coolant leakage: It may be caused by a faulty water pump, a leak in the cooling system, a faulty radiator, etc.

1. Throttle position sensor.

Function: The throttle position sensor is to monitor the size of the throttle opening angle, determine the idle speed, full load and acceleration and deceleration conditions, and implement the throttle opening state.

Corresponding various injection volume control. Failure effects: Idle speed fluctuates high and low, or causes the phenomenon of speeding.

2. Intake valve pressure sensor.

Function: The intake pressure sensor is to provide engine load information, i.e. through.

In the case of pressure measurement on the air intake pipe, the air intake into the engine is indirectly measured, and then the air intake volume is converted into an electrical signal and provided to the computer through the internal circuit. Failure effect: causing the engine to be difficult to start, or idle unstable.

3. Inlet air temperature sensor.

Purpose: Provides air temperature information for correction of fuel injection and ignition timing. Failure effect: low idle speed, easy to stall.

4. Crankshaft angle sensor.

Function: It is to provide speed and crankshaft phase information, and provide reference points for fuel injection timing and ignition timing. Failure effects: The engine cannot be started or the engine suddenly stalls after starting.

5. Coolant temperature sensor.

Function: It monitors the engine coolant temperature and converts it into a voltage signal to the computer, and the ECU controls the amount of fuel injection, ignition timing and idle speed according to this signal. Effect of failure: low idle speed.

6. Oxygen sensor.

Function: It is the main component that provides mixer concentration information, is used to correct the fuel injection volume, realizes the closed-loop control of the air-fuel ratio, and ensures that the actual air-fuel ratio of the engine is close to the theoretical air-fuel ratio. Failure effects: unstable idle speed, excessive consumption.

7. Knock sensor.

Function: It is to provide detonation information, which is used to correct the ignition timing and real-detonation closed-loop control. Failure effect: When the detonation is about to occur, the detonation signal cannot be provided, and the computer cannot receive the signal "peak" and cannot reduce the ignition advance angle, and the detonation occurs.

8. Three-way catalytic converter.

Function: The three-way catalytic converter is installed in front of the muffler in the exhaust pipe, which can reduce the content of three pollutants in the exhaust gas (carbon monoxide CO, unburned carbon oxide HC and oxide NOX) at the same time, when the air-fuel ratio of the engine is close to the theoretical air-fuel ratio, the three-way catalytic converter has the highest conversion efficiency, when the high temperature of 300 800 harmful gases undergoes oxidation and reduction reaction through the precious catalysis attached to the ceramic monomer through the three-way catalytic converter center, and is converted into harmless gas. Failure Impact:

The exhaust gas discharged is not up to standard.

How the crankshaft position sensor works:

There are three main types: magnetoelectric induction, Hall effect, and photoelectric. The three types work on the following principles:

1. Magnetoelectric induction:

The magnetoelectric inductive speed sensor and the crankshaft position sensor are installed in the distributor in two layers. The sensor consists of a permanent magnet induction detection coil and a rotor (timing rotor and speed rotor) that rotates with the distributor shaft. Timing rotor has.

One, two, or four teeth, etc., the speed rotor is 24 teeth. The permanent magnet induction detection coil is fixed on the distributor body. If the speed sensor signal and the crankshaft position sensor signal are known, as well as the working sequence of each cylinder, the crankshaft position of each cylinder can be known.

Rotor signal panels for magnetoelectric inductive speed sensors and crankshaft position sensors can also be mounted on crankshafts or camshafts.

2. Hall effect:

Hall-effect speed sensors and crankshaft position sensors are signal generators that utilize the Hall effect. The Hall signal generator is installed in the distributor, coaxial with the distributor head, and is fixed on the distributor panel by the encapsulated Hall chip and a permanent magnet. The number of notches on the trigger impeller is the same as the number of engine cylinders.

When the blade on the trigger impeller enters between the permanent magnet and the Hall element, the magnetic field of the Hall trigger is bypassed by the blade, and the Hall voltage is not generated, and the sensor has no output signal; When the notched part on the trigger impeller enters between the permanent magnet and the Hall element, the magnetic field lines enter the Hall element, the Hall voltage rises, and the sensor outputs a voltage signal.

3. Photoelectric type:

Photoelectric crankshaft position sensors are generally installed in distributors and consist of a signal generator and a signal disc with light holes. The signal panel rotates together with the distributor shaft photoelectric type, and there are 360 lithography gaps in the outer ring of the signal panel, which produces a signal with a crankshaft rotation angle of 1 °; Slightly inward, there are 6 orifices evenly spaced 60 ° apart, generating a signal of a 120° angle of rotation of the crankshaft, one of which is wider to generate a signal relative to the top dead center of the 1st cylinder. The signal generator is mounted on a distributor housing and consists of two light-emitting diodes, two photodiodes and a circuit.

The light-emitting diode is facing the photodiode. The signal disk is located between the light-emitting diode and the photodiode, and because there is a light hole on the signal disk, the phenomenon of alternating light transmission and shading occurs. When the beam of the light-emitting diode hits the photodiode, the photodiode generates a voltage; When the LED beam is blocked, the photodiode voltage is 0.

These voltage signals are amplified by the partial shaping of the circuit and are transmitted to the electronic control unit (ECU) at 1° and 120° crankshaft rotation angles, which calculates the engine speed and crankshaft position based on these signals.

Crankshaft position sensors are usually installed in distributors and are one of the most important sensors in control systems. Its functions are: detecting engine speed, so it is also called speed sensor; Detecting the position of the piston top dead center, so it is also called an top dead center sensor, which includes the detection of the top dead center signal of each cylinder used to control the ignition, and the top dead center signal of the first cylinder used to control the sequential fuel injection.