DTC P0340 Camshaft Position Sensor A Circuit. DTC P0341 Camshaft Position Sensor A Circuit Range/Performance

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1 DIAGNOSTIS EINE (2UZFE) DI637 DIDRK01 DT P0340 amshaft Position Sensor A ircuit DT P0341 amshaft Position Sensor A ircuit Range/Performance DT P0345 amshaft Position Sensor A ircuit (Bank 2) DT P0346 amshaft Position Sensor A ircuit Range/Performance (Bank 2) IRUIT DESRIPTION The camshaft position sensor consists of a magnet, an iron core and a pickup coil. This sensor monitors a timing rotor located on the camshaft and is used by the EM to detect the camshaft angle. The camshaft rotation synchronizes with the crankshaft rotation, and this sensor communicates the rotation of the camshaft timing rotor as a pulse signal to the EM. Based on the signal, the EM controls fuel injection time and ignition timing. If there is no signal from the camshaft position sensor even though the engine is turning or the rotation of the camshaft and the crankshaft is not synchronized, the EM interprets this as a malfunction in the sensor and sets a DT. DT No. DT Detection ondition Trouble Area P0340 P0345 P0341 P0346 No camshaft position sensor signal to EM during cranking (2 trip detection logic) No camshaft position sensor signal to EM with engine speed 600 rpm or more (1 trip detection logic) While crankshaft rotates twice, camshaft position sensor signal will be input to EM 12 times or more (1 trip detection logic) Hint: Under normal condition, the camshaft position signal is input into the EM 3 times per 2 engine revolutions Open or short in camshaft position sensor circuit VVT sensor amshaft Jumping teeth of timing belt EM

2 DI638 DIAGNOSTIS EINE (2UZFE) VV1, VV2 and NE Signal Waveforms 2 V/DIV VV1 VV2 NE Reference: Inspection using the oscilloscope. The correct waveform is as shown. Tester onnection G2+ (27) G2 (32) NE+ (25) NE (24) Specified ondition orrect waveform is as shown 20 msec./div (idling) A23538 MONITOR DESRIPTION If there are no signals from the camshaft position sensor even though the engine is turning, or if the rotation of the camshaft and the crankshaft is not synchronized, the EM interprets this as a malfunction of the sensor. MONITOR STRATEGY Related DTs Required sensors/components Frequency of operation Duration MIL operation Sequence of operation P0340 P0341 P0345 P0346 Main sensors/components Related sensors/components ontinuous P0340, P0345 case 1: 4 sec. P0340, P0345 case 2: 5 sec. P0341, P0346: 720 A P0340, P0345 case 1: 2 driving cycles P0340, P0345 case 2, P0341, P0346: Immediate None VVT sensor (Bank 1) range check or rationality VVT sensor (Bank 1) range check or rationality VVT sensor (Bank 2) range check or rationality VVT sensor (Bank 2) range check or rationality VVT sensor rankshaft position sensor, Engine speed sensor TYPIAL ENABLI ONDITIONS Item Minimum Specification Maximum The monitor will run whenever this DT is not present See page DI437 P0340, P0345 ase 1: ON Minimum battery voltage while starter ON 11 V P0340, P0345 ase 2: Engine RPM 600 rpm OFF Battery voltage 8 V Ignition switch ON P0341, P0346: After OFF to ON timing Engine revolution 720 A

3 DIAGNOSTIS EINE (2UZFE) TYPIAL MALFUNTION THRESHOLDS DI639 Detection riteria P0340, P0345 ase 1: VVT sensor signal P0340, P0345 ase 2: VVT sensor signal P0341, P0346: VVT sensor count Threshold No signal No signal 12 or more / 720 A (= Engine 2 revolutions) OMPONENT OPERATI RAE Parameter Standard Value VVT sensor signal input during every 720 A 3 WIRI DIAGRAM V16 VVT Sensor LH (Bank1) 1 (Shielded) G 25 VV1+ EM 2 L 24 VV1 V17 VVT Sensor RH (Bank2) 1 (Shielded) W 18 VV2+ 2 B 28 VV2 BR E J64 J/ BR E J64 J/ EW (*1) EY (*2) *1: Access ab, Standard ab *2: Double ab A23587

4 DI640 DIAGNOSTIS EINE (2UZFE) INSPETION PROEDURE HINT: Read freeze frame data using the handheld tester. Freeze frame data records the engine conditions when a malfunction is detected. 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 airfuel ratio was lean or rich, as well as other data from the time when a malfunction occurred. 1 Inspect resistance of VVT sensor (See page SF78). Replace VVT sensor (See page SF79). 2 heck for open and short in harness and connector between EM and VVT sensor. Wire Harness Side V16 V17 VVT Sensor EM onnector VV2 VV2+ VV1+ VV1 A21029 B17414 PREPARATION: (a) Disconnect the VVT sensor connector. (b) Disconnect the EM connector. Measure the resistance between the wire harness side connectors. : Standard: Tester onnection VVT sensor (V161) VV1+ (25) VVT sensor (V162) VV1 (24) VVT sensor (V171) VV2+ (18) VVT sensor (V172) VV2 (28) VVT sensor (V16 1) or VV1+ (25) Body ground VVT sensor (V162) or VV1 (24) Body ground VVT sensor (V17 1) or VV2+ (18) Body ground Specified ondition VVT sensor (V172) or VV2 (28) Body ground Repair or replace harness or connector.

5 DIAGNOSTIS EINE (2UZFE) DI641 3 heck sensor installation (VVT sensor). heck the VVT sensor installation. : The VVT sensor is installed properly. learance BR3795 Tighten sensor installation bolt. 4 Inspect teeth of camshaft. PREPARATION: Remove the cylinder head cover (See page EM36). heck the tooth of the camshaft. Replace camshaft. Replace EM.