Dtc P0340 Camshaft Position (Cmp) Sensor Circuit Malfunction - Suzuki Swift User Manual

6-74 ENGINE GENERAL INFORMATION AND DIAGNOSIS (TBI FOR G10)

DTC P0340 CAMSHAFT POSITION (CMP) SENSOR CIRCUIT MALFUNCTION

CIRCUIT DESCRIPTION
Sensor rotor
in distributor
DTC DETECTING CONDITION
D No CMP sensor signal for 2 seconds at engine
cranking (CKP sensor signal is inputted).
Reference
Connect oscilloscope between terminals C01-2 and C01-10 of ECM (PCM) connector connected to ECM (PCM)
and check CMP sensor signal.
Display of fuel injection signal using oscilloscope
2V/Div.
20V/Div.
1. CMP sensor signal
2. Fuel injector signal
3. Fuel injection time
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.
Camshaft
position sensor
3
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 (PCM) malfunction.
10ms/Div
1
2