Toyota 1 MZ–FE Manual page 508

EG2–508
DTC P0340 Camshaft Position Sensor Circuit
Malfunction
CIRCUIT DESCRIPTION
Camshaft position sensor (G22 signal) consist of a signal plate and pick up coil.
The G22 signal plate has one tooth, on its outer circumference and is mounted on the left bank camshafts.
When the camshafts rotate, the protrusion on the signal plate and the air gap on the pick up coil change,
causing fluctuations in the magnetic field and generating an electromotive force in the pick up coil.
The NE signal plate has 34 teeth and is mounted on the crankshaft. The NE signal sensor generates 34
signals for every engine revolution. The ECM detects the standard crankshaft angle based on the G22
signal and the actual crankshaft angle and the engine speed by the NE signals.
Diagnostic Trouble Code Detecting Condition
DTC No.
No camshaft position sensor signal to ECM during
cranking.
(2 trip detection logic)
P0340
No camshaft position sensor signal to ECM during
engine running.
1MZ–FE ENGINE – CIRCUIT INSPECTION
Open or short in camshaft position sensor circuit.
Camshaft position sensor.
Starter.
ECM
Trouble Area