P0368

3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0365: Camshaft Position Sensor "B" Circuit (Bank 1)

DTC P0365 - Camshaft Position Sensor "B" Circuit (Bank 1)

DTC P0367 - Camshaft Position Sensor "B" Circuit Low Input (Bank 1)

DTC P0368 - Camshaft Position Sensor "B" Circuit High Input (Bank 1)

DTC P0390 - Camshaft Position Sensor "B" Circuit (Bank 2)

DTC P0392 - Camshaft Position Sensor "B" Circuit Low Input (Bank 2)

DTC P0393 - Camshaft Position Sensor "B" Circuit High Input (Bank 2)

DESCRIPTION

The exhaust camshaft's Variable Valve Timing (VVT) sensor (EV1, 2 signal) consists of a magnet and MRE (Magnetic Resistance Element).
The exhaust camshaft has 3 teeth on its outer circumference. When the exhaust camshaft rotates, changes occur in the air gaps between the teeth and MRE, which affects the magnetic field. As a result, the resistance of the MRE material fluctuates. The VVT sensor converts the exhaust camshaft rotation data into pulse signals, uses the pulse signals to determine the camshaft angle, and sends it to the ECM.





- Reference: Inspection using an oscilloscope





Standard:





HINT: EV1+ and EV2+ stand for the VVT sensor signal, and NE+ stands for the CKP sensor signal.

MONITOR DESCRIPTION

If no signal is transmitted by the VVT sensor despite the engine revolving, or the rotations of the camshaft and the crankshaft are not synchronized, the ECM interprets this as a malfunction of the sensor.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS

All:





Chattering, Low voltage, High voltage:





P0365, P0390 (Engine running):





P0365, P0390 (Cranking):





TYPICAL MALFUNCTION THRESHOLDS

P0365, P0390 (Chattering):





P0367, P0392 (Low voltage):





P0368, P0393 (High voltage):





P0365, P0390 (Engine running, Cranking):





COMPONENT OPERATING RANGE





WIRING DIAGRAM





INSPECTION PROCEDURE

Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction (DTC Check / Clear).

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE)





(a) Disconnect the D40 or D41 VVT sensor connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (VVT SENSOR - ECM)





(a) Disconnect the D40 or D41 VVT sensor connector.
(b) Disconnect the D74 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK SENSOR INSTALLATION (VVT SENSOR FOR EXHAUST CAMSHAFT)





(a) Check the VVT sensor installation.
OK:
Sensor is installed correctly.
NG -- SECURELY REINSTALL SENSOR
OK -- Continue to next step.
4. CHECK EXHAUST CAMSHAFT
(a) Check the teeth of the camshaft.
OK:
Teeth do not have any cracks or deformation.
NG -- REPLACE EXHAUST CAMSHAFT
OK -- Continue to next step.
5. REPLACE VVT SENSOR
(a) Replace the VVT sensor (Removal).
NEXT -- Continue to next step.
6. CHECK WHETHER DTC OUTPUT RECURS
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream ON.
(d) Clear DTCs (DTC Check / Clear).
(e) Start the engine.
(f) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes / Pending.
(g) Read DTCs.

Result





HINT: If the engine does not start, replace the ECM.

B -- REPLACE ECM
A -- END