P0335-36, P0340, P1135-36

ENGINE SPEED SENSOR
CAMSHAFT POSITION SENSOR - CMPS
CRANKSHAFT POSITION SENSOR

Monitoring Procedure
There are three electromagnetic sensors mounted on the engine,the sensors provide engine speed and position signals to the ECM. The signals are generated by a ferrite rotor passing the face of the sensor.

All three sensors are continuously monitored while the engine is running. For the crankshaft position sensor and the engine speed sensor, if the expected number of pulses are not detected, the relevant circuit diagnostic trouble code (DTC) is stored.

For all three sensors, if unexpected pulses are detected the diagnostic determines which sensor is apparently giving an illogical output and then stores the appropriate DTC.

Fig. 1:

Engine Speed Sensor (Fig. 1)
The sensor mounted behind the flywheel provides twelve pulses per engine revolution.

Sensor resistance = 800 - 1600 ohms

Fig. 2:

Camshaft Position Sensor - CMPS (Fig. 2)
The sensor mounted on the "A" bank camshaft cover provides one pulse per two revolutions on the engine.

Sensor resistance = 1556 - 3225 ohms

Fig.3:

Crankshaft Position Sensor (Fig. 3)
The sensor mounted on the timing cover provides one pulse per engine revolution.

Sensor resistance = 800 - 1600 ohms

Full Engine Cycle Of All Electromagnetic Sensor:

Construction:

ECM Interface Circuit: