SFI SYSTEM, Diagnostic DTC:P0340, P0341, P0345, P0346

DTC Code DTC Name
P0340 Camshaft Position Sensor Circuit Malfunction
P0341 Camshaft Position Sensor "A" Circuit Range / Performance (Bank 1 or Single Sensor)
P0345 Camshaft Position Sensor "A" Circuit (Bank 2)
P0346 Camshaft Position Sensor "A" Circuit Range / Performance (Bank 2)

DESCRIPTION

The intake camshaft VVT sensors consist of a magnet and MRE (Magnetic Resistive Element).

The VVT camshaft drive 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 MRE, which affects the magnetic field. As a result, the resistance of the MRE 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.

The crank angle sensor generates 30 signals for each engine speed. Based on combination of the VVT sensor signals and crankshaft position sensor signals, the ECM detects the crankshaft angle. Then the ECM uses this data to control fuel injection time and injection timing. Also, based on the crankshaft position sensor signal, the ECM detects the engine speed.

DTC No. DTC Detection Condition Trouble Area
P0340

One of the following conditions is met (1 trip detection logic):


  • No VVT sensor for intake side signal input during crankshaft 1.5 rotations (bank 1).

  • No VVT sensor for intake side signal is sent to the ECM while cranking for 3 seconds or more (bank 1).

  • Open or short in VVT sensor circuit (for intake side of bank 1)

  • VVT sensor (for intake side of bank 1)

  • Camshaft timing gear assembly (bank 1)

  • Jumped tooth of timing chain for intake camshaft (bank 1)

  • ECM
P0341

VVT sensor for intake side signal is not 3 during crankshaft 2 rotations (bank 1).

(1 trip detection logic)
P0345

One of the following conditions is met (1 trip detection logic):


  • No VVT sensor for intake side signal input during crankshaft 1.5 rotations (bank 2).

  • No VVT sensor for intake side signal is sent to the ECM while cranking for 3 seconds or more (bank 2).

  • Open or short in VVT sensor circuit (for intake side of bank 2)

  • VVT sensor (for intake side of bank 2)

  • Camshaft timing gear assembly (bank 2)

  • Jumped tooth of timing chain for intake camshaft (bank 2)

  • ECM
P0346

VVT sensor for intake side signal is not 3 during crankshaft 2 rotations (bank 2).

(1 trip detection logic)

MONITOR DESCRIPTION

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

CONFIRMATION DRIVING PATTERN


  1. A004ISCE17

  2. Connect the GTS to the DLC3.

  3. Turn the ignition switch to ON and turn the GTS on.

  4. Clear DTCs (even if no DTCs are stored, perform the clear DTC operation) Click here.

  5. Turn the ignition switch off and wait for at least 30 seconds.

  6. Turn the ignition switch to ON and turn the GTS on.

  7. Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.

  8. With the vehicle stationary, depress the accelerator pedal and maintain an engine speed of between 2500 and 3000 rpm for 40 seconds or more [A].

  9. Drive the vehicle at 10 km/h (6.25 mph) or more for 1 minute or more [B].

    CAUTION:

    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

  10. Enter the following menus: Powertrain / Engine / Trouble Codes.

  11. Read pending DTCs.

    Tech Tips


    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  12. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

  13. Input the DTC: P0340, P0341, P0345 or P0346.

  14. Check the DTC judgment result.

    GTS Display Description
    NORMAL

    • DTC judgment completed

    • System normal
    ABNORMAL

    • DTC judgment completed

    • System abnormal
    INCOMPLETE

    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions
    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

  15. If the test result is INCOMPLETE or N/A and no DTC is output, perform a universal trip and check for permanent DTCs Click here.

    Tech Tips


    • If a permanent DTC is output, the system is malfunctioning.

    • If no permanent DTC is output, the system is normal.

WIRING DIAGRAM

A004HBKE08

CAUTION / NOTICE / HINT

Tech Tips


  • If DTC P0340 or P0341 is displayed, check the VVT sensor for intake side circuit for the right bank (bank 1).

  • If DTC P0345 or P0346 is displayed, check the VVT sensor for intake side circuit for the left bank (bank 2).

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

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

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

  • Read freeze frame data using the GTS. 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.

  • If no problem is found by this diagnostic troubleshooting procedure, troubleshoot the engine mechanical system.

PROCEDURE


  1. CHECK VVT SENSOR FOR INTAKE SIDE (SENSOR POWER SOURCE)


    1. Disconnect the VVT sensor connector.

    2. Turn the ignition switch to ON.

    3. A004KDZE03
      Text in Illustration
      *A Bank 1
      *B Bank 2
      *a

      Front view of wire harness connector

      (to VVT Sensor for Intake Side)

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      C12-1 (+B) - Body ground Ignition switch ON 11 to 14 V
      C26-1 (+B) - Body ground Ignition switch ON 11 to 14 V

    NG

    INSPECT RELAY (EFI MAIN1) Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (VVT SENSOR FOR INTAKE SIDE - ECM)


    1. Disconnect the ECM connector.

    2. Disconnect the VVT sensor connector.

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

      Standard Resistance (Check for open)
      Tester Connection Condition Specified Condition
      A34-26 (VV1+) - C12-2 (VV1+) Always Below 1 Ω
      A34-15 (VV2+) - C26-2 (VV2+) Always Below 1 Ω
      A34-34 (VVE) - C12-3 (VV1-) Always Below 1 Ω
      A34-34 (VVE) - C26-3 (VV2-) Always Below 1 Ω
      Standard Resistance (Check for short)
      Tester Connection Condition Specified Condition
      A34-26 (VV1+) or C12-2 (VV1+) - Body ground Always 10 kΩ or higher
      A34-15 (VV2+) or C26-2 (VV2+) - Body ground Always 10 kΩ or higher
      A34-34 (VVE) or C12-3 (VV1-) - Body ground Always 10 kΩ or higher
      A34-34 (VVE) or C26-3 (VV2-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (VVT SENSOR FOR INTAKE SIDE - ECM)

    OK

  3. CHECK SENSOR INSTALLATION (VVT SENSOR FOR INTAKE SIDE)


    1. A004KZJE07
      *1 Clearance

      Check the VVT sensor installation.

      OK
      Sensor is installed correctly.

    NG

    SECURELY REINSTALL VVT SENSOR FOR INTAKE SIDE Click here

    OK

  4. 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.

    NG

    REPLACE CAMSHAFT TIMING GEAR ASSEMBLY Click here

    OK

  5. CHECK VALVE TIMING


    1. Check the valve timing Click here.


    NG

    ADJUST VALVE TIMING Click here

    OK

  6. REPLACE VVT SENSOR FOR INTAKE SIDE


    1. Replace the VVT sensor Click here.


    NEXT

  7. CHECK WHETHER DTC OUTPUT RECURS (DTC P0340, P0341, P0345 AND/OR P0346)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs Click here.

    5. Turn the ignition switch off and wait for at least 30 seconds.

    6. Start the engine.

    7. Turn the GTS on

    8. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.

    9. Enter the following menus: Powertrain / Engine / Trouble Codes.

    10. Read the DTCs.

      Result
      Result Proceed to
      DTC is not output A
      DTC P0340, P0341, P0345 or P0346 is output B

      Tech Tips

      If the engine does not start, replace the ECM.


    A

    END

    B

    REPLACE ECM Click here

  8. INSPECT RELAY (EFI MAIN1)


    1. Inspect the EFI MAIN1 relay Click here.


    NG

    REPLACE RELAY (EFI MAIN1)

    OK

  9. CHECK HARNESS AND CONNECTOR (VVT SENSOR FOR INTAKE SIDE - EFI MAIN1 RELAY)


    1. Disconnect the VVT sensor for intake side connector.

    2. Remove the EFI MAIN1 relay from the engine room relay block assembly.

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

      Standard Resistance (Check for open)
      Tester Connection Condition Specified Condition
      EFI MAIN1 relay terminal 3 - C12-1 (+B) Always Below 1 Ω
      EFI MAIN1 relay terminal 3 - C26-1 (+B) Always Below 1 Ω
      Standard Resistance (Check for short)
      Tester Connection Condition Specified Condition
      EFI MAIN1 relay terminal 3 or C12-1 (+B) - Body ground Always 10 kΩ or higher
      EFI MAIN1 relay terminal 3 or C26-1 (+B) - Body ground Always 10 kΩ or higher

    OK

    GO TO ECM POWER SOURCE CIRCUIT Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (VVT SENSOR FOR INTAKE SIDE - ECM)