P0340

DTC P0340 CAMSHAFT POSITION SENSOR CIRCUIT MALFUNCTION





WIRING DIAGRAM

CIRCUIT DESCRIPTION
The CMP sensor located on the rearward of cylinder head consists of the signal generator (photo transistors) and signal rotor (slits plate).
The signal generator generates Reference signal and Position signal through two types of slits in the slit plate which turns together with the camshaft.

Reference signal
The CMP sensor generates 4 pulses of signals each of which has a different wave form while the camshaft makes one full rotation.
Based on these signals, ECM judges which cylinder piston is at the ignition BTDC 110°

Position signal
The CMP sensor generates 360 pulses of signals while the camshaft makes one full rotation (i.e., 1 pulse per 1° movement of the camshaft). Based on these signals, ECM judges the size of Reference signal, the engine speed and piston position.





DETECTING CONDITION

DTC CONFIRMATION PROCEDURE

NOTE: Check to make sure that following conditions are satisfied when using this DTC CONFIRMATION PROCEDURE.
- Intake air temp.: -14°C, 6.8°F or higher.
- Atmospheric pressure (Altitude) : 540 mmHg, 72 kPa or more (2790m, 9150 ft or less).

1) Connect scan tool to DLC with ignition switch OFF
2) Turn ON ignition switch and clear DTC, pending DTC and freeze frame data by using scan tool.
3) Crank engine for 5 seconds or more.
4) Stop cranking and check DTC by using scan tool.





TROUBLESHOOTING