What is the engine speed input circuit?
The engine input speed sensor is responsible for sending a signal about the engine’s speed to the powertrain control module (PCM). The PCM then uses this information to determine the proper shift strategy, which is then provided to the transmission.
Where is the ignition / distributor engine speed input circuit?
Next, locate the ignition/distributor/engine speed sensor on your particular vehicle. This may be a crank sensor/cam sensor; it might be a pick up coil/sensor inside the distributor; it may even be a wire coming from the coil going to the PCM to verify ignition system firing. Once located, visually inspect the connectors and wiring.
How does an engine input speed sensor work?
The basic theory of operation of an engine input speed sensor circuit is that an electromagnetic hall-effect sensor is mounted in such a manner as to allow a toothed reluctor ring to pass in very close proximity to its magnetic tip.
How to test the p0321 engine speed input circuit?
If it is a Hall Effect sensor, disconnect the harness going to the Camshaft and the Crankshaft Position Sensors. With a Digital Volt Ohm Meter (DVOM), test the 5V power supply circuit going to each sensor to insure it is being powered up (Red lead to the 5V power supply circuit, black lead to a good ground).
What does p0725 mean on an engine speed sensor?
The presence of a stored code P0725 means that the powertrain control module (PCM) has detected a circuit malfunction with the engine speed sensor input signal. The engine speed input sensor is sometimes called the transmission input speed sensor and the input speed sensor.
What are the engine speed input circuit codes?
Related engine speed input circuit engine codes include: P0726 Engine Speed Input Circuit Range/Performance P0727 Engine Speed Input Circuit No Signal P0728 Engine Speed Input Circuit Intermittent A stored code P0725 should be considered severe as the conditions which have caused it to be stored may result in damage to the transmission.
What is the p0320 ignition / distributor engine speed input circuit?
P0320 Ignition/Distributor Engine Speed Input Circuit Malfunction and P13191 Camshaft or Crankshaft sensor, from what i understand the P1391 would more than likely be the Crankshaft sensor but what would the P0320 code be?… I failed emissions on my 97 Dodge Ram with a P0320 and P0420 codes.
The basic theory of operation of an engine input speed sensor circuit is that an electromagnetic hall-effect sensor is mounted in such a manner as to allow a toothed reluctor ring to pass in very close proximity to its magnetic tip.
Can a p0725 engine speed input circuit malfunction?
The waveform pattern is recognized by the PCM as engine input speed. If the PCM fails to recognize the appropriate engine speed input signal, for a set period of time and under certain circumstances, a P0725 will be stored and a malfunction indicator lamp may be illuminated.