What are the two wires at the base of the sensor?
These two wires represent a power wire from the system and ground which is controlled by the computer. First we will check to see if the actuator is getting power. Disconnect the connector from the sensor. Check the wiring at the base of the connector this is a popular place for the wiring to break.
Where does the brown wire on a sensor go?
The brown wire is the +VDC wire that connects to the positive (+) side of the power supply and the blue wire is connected to the common terminal of the power supply; this is the negative (-) terminal that is present on the power supply. The black wire is the output (load) wire of the sensor.
How is the sensor output connected to the PLC?
In a PNP configuration, the sensor output is internally connected to the positive voltage polarity. To make a complete circuit, the load (PLC input) must be externally connected to a negative (common) voltage polarity. In an NPN configuration, the sensor output is internally connected to the negative voltage polarity.
What happens if I wire up a PNP sensor?
For example, an NPN sensor will sink voltage and a PNP will source voltage. If indeed the sensors are wired up incorrectly it should not damage the sensors as most Inductive Sensors have “reverse polarity protection”. You can verify this when reviewing the datasheet for the sensor in question.
Where does the negative lead go on a WSS meter?
When testing a passive WSS, the positive lead of the meter should be connected to the signal wire. The negative should go to the ground or a chassis ground depending on the test you are doing. The sensor and/or harness should be disconnected from the circuit so you are not measuring resistance in the ABS unit.
What causes bank 1 sensor to be set?
Bank 1 is the bank cylinder that contains the number 1 cylinder. Sensor 1 is the sensor before the catalytic converter. This code is set when there is too much fuel being injected into the combustion chamber, which can be caused by a variety of factors and failures.
How does the speed sensor work on an ABS wheel?
With the meter set to AC voltage, spin the wheel by hand. The sensor should produce between .5 to 1 volt of AC current. The faster the wheel is spun, the more voltage is produced. Some vehicles will send a DC voltage to the sensor through the ground wire.
How to test a one wire speedometer signal?
One wire is a reference power, one wire is the ground, and the third wire is the signal. 2. Use a mulitmeter to test. One-Wire Signals. (Figure 1.) volts. Depending on the application, the reference voltage is usually that when the vehicle is moving.