Troubleshooting

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

CIRCUIT DESCRIPTION

DTC Detecting Condition:

The camshaft position sensor (VV1 signal) consists of a magnet, iron core and pickup coil, and is mounted onto the intake side of the cylinder head. The timing rotor is integrated with the left bank intake camshaft.

Each time when the camshaft rotates, the air gap between the camshaft position sensor and the protrusion integrated onto the camshaft is varied. This causes the magnetic flux passing through the pickup coil to increase and decrease, generating an electromotive force. Since the voltage is generated when the camshaft protrusion approaches the pickup coil and when it departs, and alternating electrical current is produced. The NE signal plate has 34 teeth and is mounted on the crankshaft. The NE signal sensor generates 34 signals at every engine revolution. The engine ECM detects the crankshaft angle and the engine speed based on the NE signals, and the cylinder detection based on the combination of the VV1 and NE signals.

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