ENGINE GENERAL INFORMATION AND DIAGNOSIS (SFI FOR G13) 6-1-75
To ignition
switch
Signal rotor
on Camshaft
Camshaft
position
sensor
Waveforms at specified idle speed
Oscilloscope Waveforms
2 V / Div.
Crank
angle
20 ms / Div.
180_
720_
DTC P0340 CAMSHAFT POSITION (CMP) SENSOR CIRCUIT
MALFUNCTION
CIRCUIT DESCRIPTION
DTC DETECTING CONDITION POSSIBLE CAUSE
D No CMP sensor signal during engine running
(CKP sensor signal is inputted).
D CMP sensor circuit open or short.
D Signal rotor teeth damaged.
D CMP sensor malfunction, foreign material being
attached or improper installation.
D ECM (PCM) malfunction.
Reference
Connect oscilloscope between terminals C01-11 of ECM (PCM) connector connected to ECM (PCM) and body
ground and check CKP sensor signal.
DTC CONFIRMATION PROCEDURE
1) Clear DTC.
2) Start engine and keep it at idle for 1 min.
3) Select “DTC” mode on scan tool and check DTC.
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