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SFI SYSTEM, Diagnostic DTC:P0340, P0342, P0343, P0345, P0347, P0348

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DTC Code DTC Name
P0340 Camshaft Position Sensor "A" Circuit (Bank 1 or Single Sensor)
P0342 Camshaft Position Sensor "A" Circuit Low Input (Bank 1 or Single Sensor)
P0343 Camshaft Position Sensor "A" Circuit High Input (Bank 1 or Single Sensor)
P0345 Camshaft Position Sensor "A" Circuit (Bank 2)
P0347 Camshaft Position Sensor "A" Circuit Low Input (Bank 2)
P0348 Camshaft Position Sensor "A" Circuit High Input (Bank 2)
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DESCRIPTION

The intake camshaft's VVT sensor (G signal) consists of a magnet and Magnetic Resistance Element (MRE).

The camshaft timing gear has a sensor plate with 3 teeth on its outer circumference. When the gear rotates, changes occur in the air gaps between the sensor plate and magneto resistance element, which affects the magnetic field. As a result, the resistance of the magneto resistance element material fluctuates. The VVT sensor converts the gear rotation data to pulse signals, uses the pulse signals to determine the camshaft angle, and sends it to the ECM.

Then the ECM uses this data to control fuel injection time and injection timing.

DTC No. DTC Detection Condition Trouble Area
P0340

Either of the following condition is met:


  • Missing VVT sensor signal despite crankshaft position sensor inputs normal at engine speed of 600 rpm or more (1 trip detection logic)

  • No VVT sensor signal to ECM during cranking (2 trip detection logic)

  • Open or short in VVT sensor circuit for intake camshaft

  • VVT sensor for intake camshaft

  • Camshaft timing gear for intake camshaft

  • Jumped tooth of timing chain for intake camshaft

  • ECM

P0342

P0347

 Output voltage of VVT sensor is less than 0.3 V for 4 seconds (1 trip detection logic)

  • Open or short in VVT sensor circuit for intake camshaft

  • VVT sensor for intake camshaft

  • Camshaft timing gear for intake camshaft

  • Jumped tooth of timing chain for intake camshaft

  • ECM

P0343

P0348

 Output voltage of VVT sensor is more than 4.7 V for 4 seconds (1 trip detection logic)

  • Open or short in VVT sensor circuit for intake camshaft

  • VVT sensor for intake camshaft

  • Camshaft timing gear for intake camshaft

  • Jumped tooth of timing chain for intake camshaft

  • ECM
P0345 No VVT sensor signal at engine speed of 600 rpm or more (1 trip detection logic)

  • Open or short in VVT sensor circuit for intake camshaft

  • VVT sensor for intake camshaft

  • Camshaft timing gear for intake camshaft

  • Jumped tooth of timing chain for intake camshaft

  • ECM

Reference: Inspection using an oscilloscope

Tip:

  • The correct waveform is shown in the illustration.

  • VV1+ and VV2+ stand for the VVT sensor signal, and NE+ stands for the crankshaft position sensor signal.

    Item Content
    Terminals

    NE+ - NE-

    VV1+ - VV1-

    VV2+ - VV2-
    Equipment Settings 5 V/DIV., 20 ms./DIV.
    Conditions Idling
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WIRING DIAGRAM

Refer to DTC P0335 (Click here).

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INSPECTION PROCEDURE

Tip:

  • Bank 1 refers to the bank that includes the No. 1 cylinder*.

    *: The No. 1 cylinder is the cylinder which is farthest from the transmission.

  • Bank 2 refers to the bank that does not include the No. 1 cylinder.

  • 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 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.

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PROCEDURE


  1. Click here

    CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE)


    1. A017BEXE20

      Disconnect the VVT sensor connector.

    2. Turn the ignition switch on (IG).

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

      Standard voltage
      Bank 1
      Tester Connection Switch Condition Specified Condition
      B22-3 (VC) - Body ground Ignition switch on (IG) 4.5 to 5.0 V
      Bank 2
      Tester Connection Switch Condition Specified Condition
      B23-3 (VC) - Body ground Ignition switch on (IG) 4.5 to 5.0 V
      Table 1. Text in Illustration
      *1 Bank 1
      *2 Bank 2
      *a

      Front view of wire harness connector

      (to VVT Sensor for Intake Camshaft)

    4. Reconnect the VVT sensor connector.


  2. Click here

    CHECK HARNESS AND CONNECTOR (VVT SENSOR - 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)
      Bank 1
      Tester Connection Condition Specified Condition
      B22-1 (VVR+) - B50-9 (VV1+) Always Below 1 Ω
      B22-2 (VVR-) - B50-10 (VV1-) Always Below 1 Ω
      Bank 2
      Tester Connection Condition Specified Condition
      B23-1 (VVL+) - B50-12 (VV2+) Always Below 1 Ω
      B23-2 (VVL-) - B50-11 (VV2-) Always Below 1 Ω
      Standard resistance (Check for short)
      Bank 1
      Tester Connection Condition Specified Condition
      B22-1 (VVR+) or B50-9 (VV1+) - Body ground Always 10 kΩ or higher
      B22-2 (VVR-) or B50-10 (VV1-) - Body ground Always 10 kΩ or higher
      Bank 2
      Tester Connection Condition Specified Condition
      B23-1 (VVL+) or B50-12 (VV2+) - Body ground Always 10 kΩ or higher
      B23-2 (VVL-) or B50-11 (VV2-) - Body ground Always 10 kΩ or higher

    4. Reconnect the VVT sensor connector.

    5. Reconnect the ECM connector.


  3. Click here

    CHECK SENSOR INSTALLATION (VVT SENSOR)


    1. A017C02E54

      Check the VVT sensor installation condition.

      OK
      Sensor is installed correctly.

  4. Click here

    CHECK CAMSHAFT TIMING GEAR ASSEMBLY (TEETH OF PLATE)


    1. Check the teeth of the sensor plate.

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

  5. Click here

    REPLACE VVT SENSOR (FOR INTAKE CAMSHAFT)


    1. Replace the VVT sensor for intake camshaft (Click here).


  6. Click here

    CHECK WHETHER DTC OUTPUT RECURS


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch on (IG).

    3. Turn the tester on.

    4. Clear the DTCs.

    5. Turn the ignition switch off.

    6. Turn the ignition switch on (IG), and turn the tester on.

    7. Start the engine.

    8. Idle the engine for 10 seconds or more.

    9. Select the following menu items: Powertrain / Engine and ECT / DTC / Pending.

    10. Read the pending DTCs.

      Result
      Display (DTC Output) Proceed to
      No output A
      P0340, P0342, P0343, P0345, P0347 or P0348 B
      Tip:

      If the engine does not start, replace the ECM.


  7. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR (VVT SENSOR - ECM)

  8. Click here

    REPAIR OR REPLACE VVT SENSORClick here

  9. Click here

    REPLACE CAMSHAFT TIMING GEAR ASSEMBLYClick here

  10. Click here

    REPLACE ECMClick here

  11. Click here

    END

  12. Click here

    CHECK HARNESS AND CONNECTOR (VVT SENSOR - ECM)


    1. Disconnect the VVT sensor for intake camshaft connector.

    2. Disconnect the ECM connector.

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

      Standard resistance (Check for open)
      Bank 1
      Tester Connection Condition Specified Condition
      B22-3 (VC) - B50-15 (VCV1) Always Below 1 Ω
      Bank 2
      Tester Connection Condition Specified Condition
      B23-3 (VC) - B50-16 (VCV2) Always Below 1 Ω
      Standard resistance (Check for short)
      Bank 1
      Tester Connection Condition Specified Condition
      B22-3 (VC) or B50-15 (VCV1) - Body ground Always 10 kΩ or higher
      Bank 2
      Tester Connection Condition Specified Condition
      B23-3 (VC) or B50-16 (VCV2) - Body ground Always 10 kΩ or higher

    4. Reconnect the VVT sensor for intake camshaft connector.

    5. Reconnect the ECM connector.