Troubleshooting

DTC P0340 CAMSHAFT POSITION SENSOR "A" CIRCUIT (BANK 1 OR SINGLE SENSOR)

CIRCUIT DESCRIPTION

DTC Detecting Condition:

The camshaft position sensor (G22 signal) consists of a magnet, iron core and pickup coil.

The G22 signal rotor has 3 teeth on the outside and is mounted on the intake camshaft.

When the camshafts rotate, the protrusion on the signal plate and the air gap on the pickup coil changes, causing fluctuations in the magnetic field and generating an electromotive force in the pickup coil.

The NE signal plate (crank angle sensor plate) has 34 teeth and is installed in the crankshaft. The NE signal sensor generates 34 signals at every engine revolution. The engine ECM detects the crankshaft angle and the engine revolution based on the NE signal, and the detection of the cylinder and the phase of the VVT based on the combination of the G22 and NE signal.

HINT:
- DTC P0340 indicate a malfunction related to the camshaft position sensor (+) circuit. (Wire harness (ECM - camshaft position sensor) and camshaft position sensor)
- DTC P0341 indicate a malfunction related to the camshaft position sensor (-) circuit. (Wire harness (ECM - camshaft position sensor) and camshaft position sensor)

Wiring Diagram:

Step 1:

Step 2 - 4:

INSPECTION PROCEDURE

HINT: Read freeze frame data using the hand-held tester or the OBD II scan tool, as freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was lean or rich, etc. at the time of the malfunction.