Troubleshooting

P0340 - Camshaft Position Sensor Circuit Malfunction

CIRCUIT DESCRIPTION

DTC Detection Condition:

Camshaft position sensor (G signal) consists of a magnet, iron core and pickup coil.

The G signal plate has 1 tooth, on its outer circumference and is mounted on the RH camshaft timing pulley. When the camshafts rotate, the protrusion on the signal plate rotates, as well. Because of this, 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 has 34 teeth and is mounted on the crankshaft timing pulley. The NE signal sensor generates 34 signals at every engine revolution. The ECM detects the standard crankshaft angle based on the G signal and the actual crankshaft angle and the engine speed by the NE signal.

Wiring Diagram:

Step 1 - 2:

Step 2(continued) - 3:

INSPECTION PROCEDURE

HINT: Read freeze frame data using hand-held tester or 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.