What does the ECM know about the crankshaft?
Basically the ECM knows that the camshafts turn at half crank speed. It expects the cam sensor to send signal pulses in time with the crankshaft sensor so the proper cylinders get spark and fuel at the correct time.
How does the crankshaft position sensor work in a car?
It monitors the position and rotational speed of the crankshaft and sends the information to the engine control unit so it can make appropriate adjustments based on operating conditions.
Can a bad crankshaft sensor cause the engine to stall?
If the crankshaft position sensor or its wiring have any issues, it can cause the crankshaft signal to be cut off while the engine is running, which can cause the engine to stall. This is usually a symptom of a wiring problem, however a bad crankshaft position sensor can also produce this symptom.
How does the ECM relearn the sensor information?
Because of manufacturing changes and differences each sensor is slightly different in signal output and even in where it reads the signal depending on the position of the sensing part inside the actual head of the sensor. The relearn procedure “resets” the sensor information so the ECM can learn the new sensors signal.
Basically the ECM knows that the camshafts turn at half crank speed. It expects the cam sensor to send signal pulses in time with the crankshaft sensor so the proper cylinders get spark and fuel at the correct time.
It monitors the position and rotational speed of the crankshaft and sends the information to the engine control unit so it can make appropriate adjustments based on operating conditions.
If the crankshaft position sensor or its wiring have any issues, it can cause the crankshaft signal to be cut off while the engine is running, which can cause the engine to stall. This is usually a symptom of a wiring problem, however a bad crankshaft position sensor can also produce this symptom.
Where is the PCM located on a 1996n2002 small block engine?
All 1996ñ2002 Gen I small-block engines found in production vehicles use a 4x crankshaft reluctor. This reluctor is installed on the crankshaft in the front timing chain cover. Combined with a CKP sensor, the PCM uses the signal to determine engine position.
Can you re-learn a crankshaft position sensor?
If it is not done you can get mis-fire codes and poor engine performance or in newer engine a reduced power condition. A dealer is not the only place that can do a re-learn, pretty much any good shop with a bi-directional scan tool can handle it as it is a very common item to be done, even for some diagnostic work. helpful?
Is the cam sensor the same as the crank sensor?
It expects the cam sensor to send signal pulses in time with the crankshaft sensor so the proper cylinders get spark and fuel at the correct time. Your cam sensor is in the distributor and changing it does not require a relearn as it is a different style sensor than the crank sensor.
Because of manufacturing changes and differences each sensor is slightly different in signal output and even in where it reads the signal depending on the position of the sensing part inside the actual head of the sensor. The relearn procedure “resets” the sensor information so the ECM can learn the new sensors signal.