P0345
DTC P0340 Camshaft Position Sensor Circuit MalfunctionDTC P0341 Camshaft Position Sensor "A" Circuit Range / Performance (Bank 1 or Single Sensor)
DTC P0345 Camshaft Position Sensor "A" Circuit (Bank 2)
DTC P0346 Camshaft Position Sensor "A" Circuit Range / Performance (Bank 2)
DESCRIPTION
DTC Detection Condition:
The intake camshaft's Variable Valve Timing (VVT) sensor (VV signal) consists of a magnet and MRE element.
The VVT camshaft drive gear has a sensor plate with 3 teeth on its outer circumference. When the gear rotates, changes occur in the air gaps between the sensor plate and pickup coil, which affects the magnet. As a result, the resistance of the MRE material fluctuates. The VVT sensor converts the gear rotation data to pulse signals, and uses the pulse signals to determine the camshaft angle, which it sends to the ECM.
Then the ECM uses this data to control fuel injection time and injection timing.
The crankshaft angle sensor plate has 34 teeth. The pickup coil generates 34 signals for each engine revolution. Based the VV signal and actual crankshaft angle, the ECM detects the normal crankshaft angle. Also, based on the NE signal, the ECM detects the engine speed.
HINT:
- DTC P0340 and P0345 indicate a malfunction related to the VVT sensor (+) circuit (Wire harness (ECM - VVT sensor) and VVT sensor).
- DTC P0341 and P0346 indicate a malfunction related to the VVT sensor (-) circuit (Wire harness (ECM - VVT sensor) and VVT sensor).
Reference: Inspection using an oscilloscope
HINT:
- The correct waveform is shown.
- VV1+ and VV2+ stand for the VVT sensor signal, and NE+ stands for the CKP sensor signal.
MONITOR DESCRIPTION
Monitor Strategy:
Typical Enabling Conditions (Part 1):
Typical Enabling Conditions (Part 2):
Typical Malfunction Thresholds:
Component Operating Range:
If no signal is transmitted by the VVT sensor despite the engine revolving, or the rotations of the camshaft and the crankshaft are not synchronized, the ECM interprets this as a malfunction of the sensor.
Wiring Diagram:
Step 1-2:
Step 3-5:
Step 5(Continued):
INSPECTION PROCEDURE
HINT: Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was LEAN or RICH, and other data from the time the malfunction occurred.