Pcm voltages.
#1
Pcm voltages.
I am going to leave out a little of unnecessary details. Can anyone accurately say what the voltage for the crank and cam sensors are. (Logically thinking should be 5vref. And what should the resistance be acros the terminals at the cam plug. I am thinking I am not getting voltage out of pcm to get rpm signal.
#4
To see the singles you need a scope. They work like a tiny generator.
The proper name is Variable reluctance sensor.
https://en.wikipedia.org/wiki/Variab...uctance_sensor
Here is the quick and dirty.
A variable reluctance sensor (commonly called a VR sensor) is a transducer that, when combined with very basic electronic circuitry, detects the change in presence or proximity of ferrous objects.
The proper name is Variable reluctance sensor.
https://en.wikipedia.org/wiki/Variab...uctance_sensor
Here is the quick and dirty.
A variable reluctance sensor (commonly called a VR sensor) is a transducer that, when combined with very basic electronic circuitry, detects the change in presence or proximity of ferrous objects.
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The signal is the voltage coming from the sensor. It stills needs a return path
and that is why the Ground or - line.
Signal would be the + and the Ground will be the -.
I am not going to really mess you up with proper electrical flow stuff.
The best way to think of this is as an electrical isolated device with 2 wires that carry a signal to
the PCM. The PCM looks at the signal and with some basic components and some software it can
then determine how fast the the cam or crank is moving and with the index tooth that is missing
can tell what degree the two are at any given moment.
The harness to the cm and crank sensors will have a shield foil on them do to the fact that stray
voltage cam be picked up and confuse the PCM. The voltage that the sensor creates will be very
small down in the millivolt range.
Here is a decent video. He talks about both types of sensors.
NOTE Ignore the Vref in this as we are not using it in the two sensors.
We are not using a HALL EFFECT Sensor in this case. You also
have the same type of sensor in the 2 ABS sensors and the one in the rear diff.
and that is why the Ground or - line.
Signal would be the + and the Ground will be the -.
I am not going to really mess you up with proper electrical flow stuff.
The best way to think of this is as an electrical isolated device with 2 wires that carry a signal to
the PCM. The PCM looks at the signal and with some basic components and some software it can
then determine how fast the the cam or crank is moving and with the index tooth that is missing
can tell what degree the two are at any given moment.
The harness to the cm and crank sensors will have a shield foil on them do to the fact that stray
voltage cam be picked up and confuse the PCM. The voltage that the sensor creates will be very
small down in the millivolt range.
Here is a decent video. He talks about both types of sensors.
NOTE Ignore the Vref in this as we are not using it in the two sensors.
We are not using a HALL EFFECT Sensor in this case. You also
have the same type of sensor in the 2 ABS sensors and the one in the rear diff.
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