SFI SYSTEM, Diagnostic DTC:P0365, P0367, P0368, P0390, P0392, P0393

DTC Code DTC Name
P0365 Camshaft Position Sensor "B" Circuit (Bank 1)
P0367 Camshaft Position Sensor "B" Circuit Low Input (Bank 1)
P0368 Camshaft Position Sensor "B" Circuit High Input (Bank 1)
P0390 Camshaft Position Sensor "B" Circuit (Bank 2)
P0392 Camshaft Position Sensor "B" Circuit Low Input (Bank 2)
P0393 Camshaft Position Sensor "B" Circuit High Input (Bank 2)

DESCRIPTION

The VVT sensor system consists of a timing rotor (installed on each camshaft) and magnetic resistance element type VVT sensor. The timing rotor (camshaft) has 3 protrusions. When it rotates, the magnetic vector (direction of magnetic field) applied to the VVT sensor's magnetic resistance element varies, which causes its resistance to vary. This varying resistance is converted to voltage, and then modified into a rectangular waveform with Hi (approximately 4 V) and Lo (approximately 1 V) outputs. As a result, the actual camshaft's position is detected and the position is output to the ECM.

DTC No. DTC Detection Condition Trouble Area

P0365

P0390

No VVT sensor signal for exhaust side (bank 1, 2) to ECM at engine speed 600 rpm or more

(1 trip detection logic)

  • Open or short in VVT sensor for exhaust side circuit

  • VVT sensor for exhaust side

  • Exhaust camshaft

  • ECM

P0367

P0392

Output voltage of VVT sensor for exhaust side (bank 1, 2) less than 0.3 V for 5 seconds

(1 trip detection logic)

  • Open or short in VVT sensor for exhaust side circuit

  • VVT sensor for exhaust side

  • Exhaust camshaft

  • ECM

P0368

P0393

Output voltage of VVT sensor for exhaust side (bank 1, 2) less than 4.7 V for 5 seconds

(1 trip detection logic)

  • Open or short in VVT sensor for exhaust side circuit

  • VVT sensor for exhaust side

  • Exhaust camshaft

  • ECM
A0160TQE03

Reference: Inspection using an oscilloscope

Tech Tips


  • The correct waveform is as shown.

  • The wavelength becomes shorter as the engine speed increases.

  • EV1+ and EV2+ stand for the VVT sensor (for exhaust side) signal.

    Item Content
    Terminal

    EV1+ - EV1-

    EV2+ - EV2-
    Equipment Setting 5 V/DIV., 20 msec./DIV.
    Condition Cranking or idling

MONITOR DESCRIPTION

If no signal is transmitted by the VVT sensor despite the engine revolution, the ECM interprets this as a malfunction of the sensor.

When the sensor output voltage remains less than 0.3 V, or more than 4.7 V for more than 5 seconds, the ECM sets a DTC.

WIRING DIAGRAM

A015YI7E08

INSPECTION PROCEDURE

Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE


  1. CHECK ECM TERMINAL VOLTAGE


    1. A0162N2E02

      Inspect the ECM using an oscilloscope.


      1. While the engine is idling, check the waveform between the terminals of the ECM connector.

        Standard Voltage
        Tester Connection Condition Specified Condition
        E3-26 (EV1+) - E3-33 (EV1-) Engine idling or cranking Correct waveform appears as shown
        E6-22 (EV2+) - E6-29 (EV2-) Engine idling or cranking Correct waveform appears as shown
      Result
      Result Proceed to
      NG A
      OK B

    B

    CHECK FOR INTERMITTENT PROBLEMS

    A

  2. CHECK VVT SENSOR (SENSOR POWER SOURCE)


    1. A01605WE02

      Disconnect the VVT sensor connector.

    2. Turn the engine switch on (IG).

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      E34-3 (VC2) - Body ground Engine switch on (IG) 4.5 to 5.0 V
      E25-3 (VC2) - Body ground Engine switch on (IG) 4.5 to 5.0 V

    4. Reconnect the VVT sensor connector.


    NG

    CHECK HARNESS AND CONNECTOR (VVT SENSOR FOR EXHAUST SIDE - ECM) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (VVT SENSOR FOR EXHAUST SIDE - ECM)


    1. Disconnect the VVT sensor connector.

    2. Disconnect the ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      E34-1 (EX+) - E3-26 (EV1+) Always Below 1 Ω
      E34-2 (EX-) - E3-33 (EV1-) Always Below 1 Ω
      E25-1 (EX+) - E6-22 (EV2+) Always Below 1 Ω
      E25-2 (EX-) - E6-29 (EV2-) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      E34-1 (EX+) or E3-26 (EV1+) - Body ground Always 10 kΩ or higher
      E34-2 (EX-) or E3-33 (EV1-) - Body ground Always 10 kΩ or higher
      E25-1 (EX+) or E6-22 (EV2+) - Body ground Always 10 kΩ or higher
      E25-2 (EX-) or E6-29 (EV2-) - Body ground Always 10 kΩ or higher

    4. Reconnect the VVT sensor connector and ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK SENSOR INSTALLATION (VVT SENSOR FOR EXHAUST SIDE)


    1. A0160ZHE17

      Check the VVT sensor installation.

      OK
      Sensor is installed correctly.

    NG

    REPAIR OR REPLACE VVT SENSOR Click here

    OK

  5. CHECK EXHAUST CAMSHAFT


    1. Check the teeth of the signal plate.

      OK
      Signal plate teeth do not have any cracks or deformation.

    NG

    REPLACE EXHAUST CAMSHAFT Click here

    OK

  6. REPLACE VVT SENSOR FOR EXHAUST SIDE


    1. Replace the VVT sensor for exhaust side Click here.


    NEXT

  7. CHECK WHETHER DTC OUTPUT RECURS


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the tester on.

    4. Clear the DTCs Click here.

    5. Start the engine.

    6. Enter the following menus: Powertrain / Engine / DTC.

    7. Read the DTCs.

      Result
      Result Proceed to
      DTC is not output A
      DTC P0365, P0367, P0368, P0390, P0392 and/or P0393 are output B

      Tech Tips

      If the engine does not start, replace the ECM.


    B

    REPLACE ECM Click here

    A

    END

  8. CHECK HARNESS AND CONNECTOR (VVT SENSOR FOR EXHAUST SIDE - ECM)


    1. Disconnect the VVT sensor connector.

    2. Disconnect the ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      E34-3 (VC2) - E3-18 (VC) Always Below 1 Ω
      E25-3 (VC2) - E3-18 (VC) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      E34-3 (VC2) or E3-18 (VC) - Body ground Always 10 kΩ or higher
      E25-3 (VC2) or E3-18 (VC) - Body ground Always 10 kΩ or higher

    4. Reconnect the VVT sensor connector and ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM Click here