P0340
DTC P0340: Camshaft Position (CMP) Sensor Circuit MalfunctionWiring Diagram:
Wiring Diagram
System Description
CMP sensor detects REF signal and POS signal.
- REF signal: 4 pulses/1 revolution of camshaft. There are 2 different kinds of wavelength. Based on REF signal, ECM (PCM) judges which cylinder is at TDC.
- POS signal: 6 pulse/1 revolution of camshaft. Each of POS signals has equivalent wavelength. Based on POS signal, ECM (PGM) judges the wavelength of REF signals, engine speed and piston position.
Reference
Connect oscilloscope between terminals "C51-1-13" (POS) or "C51-1-12" (REF) and "C51-3-26" (ground) of ECM (PCM) connector connected to ECM (PCM) and check CMP sensor signal
DTC Detecting Condition / Trouble Area:
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
NOTE: Check to make sure that the following condition is satisfied when using this "DTC Confirmation Procedure".
- Intake air temp.: -8 °C (18 °F) or higher
- Engine coolant temp.: -8 - 110 °C (18 - 230 °F)
- Altitude (barometric pressure): 2400 m, 8000 ft or less (560 mmHg (75 kPa) or more)
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 3 seconds or more and keep it at idle for 1 min.
4. Check DTC by using scan tool.
Step 1 - 6:
DTC Troubleshooting