P0340

DTC P0340 CAMSHAFT POSITION (CMP) SENSOR CIRCUIT MALFUNCTION

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WIRING DIAGRAM

CIRCUIT DESCRIPTION
The camshaft position sensor located in the distributor consists of the signal generator (pick-up coil and magnet) and signal rotor. As the signal rotor turns, AC voltage is generated in the pick-up coil which varies in pulsatory way as shown. This pulse signal (5 pulses/revolution) is sent to ECM where it is used to calculate the engine speed and the piston position of each cylinder and that information is also used as one of the signals to control various devices.

DETECTING CONDITION

Reference
Connect oscilloscope between terminals C20-2 and C21-1 (ground) of ECM connector connected to ECM and check CKP sensor signal.

DTC CONFIRMATION PROCEDURE
1) Clear DTC.
2) Start engine and keep it at idle for 1 min.
2) Select "DTC" mode on scan tool and check DTC.

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INSPECTION