How To Tell ABS Sensor And Speed Sensor Bad ? Analysis OF Common Automobile Faults

II.Several Ways To Determine Whether The Wheel Speed Sensor Is Bad

1. Oxygen sensor: When the oxygen sensor fails, the ECU cannot obtain this information, and it does not know whether the amount of gasoline injected is correct, and the inappropriate oil-gas-air-fuel ratio will lead to the reduction of engine power and increase emissions pollution;
2. wheel speed sensor: it is mainly to collect the speed of the car to determine whether the car has signs of skid, so there is a special sensor to collect the wheel speed of the car to complete the job, generally installed on the hub of each wheel, and once the sensor is damaged, ABS will fail;
3. water temperature sensor: when the water temperature sensor fails, the temperature signal is often displayed when the cold car starts or when the hot car starts, the ECU can not get the correct signal, and can only supply the thinner mixture of the engine, so the engine cold car is not easy to start, and it will also be accompanied by the problem of unstable idle operation and insufficient acceleration power;
4. electronic accelerator pedal position sensor: When the sensor fails, the ECU can not measure the accelerator position signal, can not obtain the correct position of the accelerator door pedal, so there will be a phenomenon of engine acceleration weakness, and even the engine can not accelerate;
5. the intake pressure sensor: As the name suggests, the intake pressure sensor is with the different speed load of the engine, the induction of a series of resistance and pressure changes, converted into voltage signals, for the ECU to correct the injection amount and ignition timing Angle. Generally installed on the throttle valve, if the fault will cause ignition difficulties, idle instability, acceleration and other problems.

1. Check whether the sensor head is dirty;
2. Detect whether the gap between the sensing head and the gear ring is too large or too small or whether it is crooked or whether it meets the regulations;
3. Detect tooth ring defects;
4. Check whether the resistance value of the electromagnetic coil meets the standard, short circuit or short circuit

III. ABS System

What Is ABS System

IV. A Few Tips To Solve The Problem OF ABS Failure Lights

• If the ABS lock system fails, the detection point must be reset first to ensure that the detection plug is not lost. Check and detect potential hazards in a timely manner.
• After the pre-test is completed, the state of the brake fluid, brake fluctuation, and each contact (including the wire, power line, base, etc.) is tested, and the corresponding maintenance plan is formulated accordingly to solve the problem of oil leakage in time and restore the deep aging.
• To ensure proper operation of the Antilock braking system, the vehicle's relays, joints and engine operations are fully operational. Make ABS work reliably all the time. Pay attention to the use of measurement test methods to improve the detection of vehicle performance and maintenance. The lock brake failure system checks the indicator light elsewhere, and if the indicator light is not on and the wheel cannot stop quickly, the tire speed must be tested. In order to effectively eliminate these hidden dangers, the error type must be determined according to the test results. ABS process is normal, car leaves.
• If the taillight is on properly, you can drive normally. After the test steps are specified at the detection level, the indicator light changes should be carefully monitored. The brake cannot be disconnected immediately), indicating that the ABS system is faulty. It is necessary to thoroughly inspect and maintain the brake pedal, the most damaged location of the brake disc, and start the vehicle after maintenance to check for faults. Resolved to ensure proper speed control when braking and to avoid road accidents due to rear collisions. Find the displayed code, find out the cause of the fault, and combined with the detection system of the vehicle, you can use the active detection method to detect the displayed fault code, you can determine the cause of the fault. The brake pedal is unstable. - Brake). In extreme cases, the restoration of automatic operation requires timely adjustment, and to achieve braking and timely braking operation, the entire ABS system must be replaced.