Suzuki WagonR+ RB310 Service Manual page 2437

6-78 ENGINE DIAGNOSIS
DTC P0340 CAMSHAFT POSITION (CMP) SENSOR CIRCUIT
(DTC No.15) MALFUNCTION
CIRCUIT DESCRIPTION
Signal rotor
on Camshaft
DTC DETECTING CONDITION
D No CMP sensor signal during engine running
(CKP sensor signal is inputted).
Reference
Connect oscilloscope between terminals E21-11 of ECM connector connected to ECM and body ground and check
CKP sensor signal.
Oscilloscope Waveforms
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.
To ignition
Camshaft switch
position
sensor
E21-11
2 V / Div.
Crank
angle
180_
720_
Waveforms at specified idle speed
POSSIBLE CAUSE
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 malfunction.
20 ms / Div.