2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 460
2.CHECK CRANKSHAFT POSITION SENSOR-II
Check resistance between crankshaft position sensor terminals as per the following.
Is the inspection result normal?
YES - INSPECTION END
NO - Replace crankshaft position sensor.
P0340
P0340, P0345 CMP SENSOR
Description
The camshaft position (CMP) sensor senses the retraction of camshaft (INT) to identify a particular cylinder. The camshaft position sensor senses
the piston position.
When the crankshaft position sensor system becomes inoperative, the camshaft position sensor provides various controls of engine parts instead,
utilizing timing of cylinder identification signals.
The sensor consists of a permanent magnet and Hall IC.
When engine is running, the high and low parts of the teeth cause the gap with the sensor to change.
The changing gap causes the magnetic field near the sensor to change.
Due to the changing magnetic field, the voltage from the sensor changes.
ECM receives the signals as shown in the figure.
DTC Logic
DTC DETECTION LOGIC
NOTE:
If DTC P0340 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. See: P Code Charts/P0643.
