Measure of a wheel speed sensor, Avenue of Stars, and the output voltage, while the continuity of the circuit, insert the ABS module, Avenue of Stars, a breakthrough box, wiring harness, and additional tests result in the appropriate sensor from the DVOM interface box circuit pin. (Note: DVOM test line can also be directly connected to the wheel speed sensor, but the sensor test in this way to win the next, AOT shows that if the signal connected to the ABS control module or not.) Spin of the hands, and pay attention to wheel speed sensors, Avenue of Stars During this period, the voltage readings.
A good wheel speed sensors typically produce alternating current (50-700 voltage AC) voltage readings, the wheel is rotating at about one per second speed.
If the voltage readings of low or does not exist, please check the sensor, the Avenue of Stars resistance (with key off). This can be through DVOM interface box. Check by breaking box-type resistance will tell you that if the sensors, wiring harness the determination of the Avenue of Stars. If the wheel speed sensor doesn under, AOT to read between 990-1210 ohms, disconnect the sensor and wiring harness attached DVOM test probe sensor check sensor resistance clues to the Avenue of Stars. A resistant reading, and now within the framework of the Administrative Officer to tell you the problem lies in the wiring, rather than the sensor. If the sensor there are too many internal resistance (open) or too little resistance (shorts), sensor defects, to be replaced.
Grounds or in the wheel speed sensor cable short circuit, you can check found that the continuity between the wire connectors. (See Figure. 3). If a defect is found in the line to run the sensor and chassis, replacing the new cable is not trying to fix or repair stitching a better choice. This two line goes through a stretching experience for each suspension of the collision, the new line will be better than had been welding, stitching or recorded significant growth.
Another method is to check the wheel speed sensor is used oscilloscope. By showing the scope of the screen, sensors, Avenue of Stars graphics output mode, you can often see problems, or hard to find. Sensors on a ring is missing or damaged teeth, for example, may not produce a significant change in sensor output voltage of the Avenue of Stars. However, the fluctuations in the signal occurs each time the tip missing teeth may be sufficient to affect the ABS wheel speed sensor to pass the module operation.
Range of connection can be through group discussion, you can also directly attached to the wheel speed sensor. A range of wheel speed sensor pattern, showing a typical AC sine wave pattern changes are in the frequency and amplitude with the wheel speed. When the wheels turn faster, while the frequency and amplitude of the signal should be increased. On the sensor ring damaged or missing teeth will appear as a flat location or sine wave pattern gap. A crank or hub will have a change in the pattern of ups and downs as the revolution sensor signal strength of each change.
If the model range from sensors produced razed to the ground (less amplitude) or unstable, it usually indicates a weak signal between the sensor and its rings, or metal fragments to build the last corner of the air gap is too large a result of sensor The. Weak signal can also be caused by short circuit in the sensor or its circuit, or loose connections or corrosion of the internal resistance line.
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Abs Speed Sensor,
Wheel Speed Sensor