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

DTC Code DTC Name
P0340 Camshaft Position Sensor Circuit Malfunction
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)

DESCRIPTION

The VVT sensor (for intake side) (VV1, VV2 signal) consists of a magnet and MRE (Magneto Resistance Element).

The camshaft timing gear assembly has a sensor plate for the VVT sensor. When the intake camshaft rotates, changes occur in the air gaps between the timing rotor and MRE, which affects the magnetic field.

As a result, the resistance of the MRE material fluctuates. The VVT sensor converts the intake camshaft 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 duration, fuel injection timing and Variable Valve Timing (VVT) system.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P0340

Camshaft Position Sensor Circuit Malfunction

One of the following conditions is met:

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

  • No VVT sensor signal to ECM at engine speed of 600 rpm or higher (1 trip detection logic).

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

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

  • VVT sensor (for intake side)

  • Camshaft timing gear assembly

  • Valve timing

  • ECM

Comes on

DTC stored

P0342

Camshaft Position Sensor "A" Circuit Low Input (Bank 1 or Single Sensor)

The output voltage of the VVT sensor is less than 0.3 V for 4 seconds (1 trip detection logic).

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

  • VVT sensor (for intake side)

  • ECM

Comes on

DTC stored

P0343

Camshaft Position Sensor "A" Circuit High Input (Bank 1 or Single Sensor)

The output voltage of the VVT sensor is higher than 4.7 V for 4 seconds (1 trip detection logic).

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

  • VVT sensor (for intake side)

  • ECM

Comes on

DTC stored

P0345

Camshaft Position Sensor "A" Circuit (Bank 2)

No VVT sensor signal at engine speed of 600 rpm or higher (1 trip detection logic).

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

  • VVT sensor (for intake side)

  • Camshaft timing gear assembly

  • Valve timing

  • ECM

Comes on

DTC stored

P0347

Camshaft Position Sensor "A" Circuit Low Input (Bank 2)

The output voltage of the VVT sensor is less than 0.3 V for 4 seconds (1 trip detection logic).

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

  • VVT sensor (for intake side)

  • ECM

Comes on

DTC stored

P0348

Camshaft Position Sensor "A" Circuit High Input (Bank 2)

The output voltage of the VVT sensor is higher than 4.7 V for 4 seconds (1 trip detection logic).

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

  • VVT sensor (for intake side)

  • ECM

Comes on

DTC stored

  • Reference: Inspection using an oscilloscope.

    Click here

MONITOR DESCRIPTION

If no pulse signal is transmitted by the VVT sensor (for intake side) despite the camshaft rotating, or the rotation of the camshaft and the crankshaft is not synchronized, the ECM interprets this as a malfunction of the sensor.

Also, when the sensor output voltage remains at less than 0.3 V, or higher than 4.7 V for 4 seconds, the ECM stores a DTC.

CONFIRMATION DRIVING PATTERN

  1. Connect the GTS to the DLC3.

  2. Turn the engine switch on (IG) and turn the GTS on.

  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

  4. Turn the engine switch off and wait for at least 30 seconds.

  5. Turn the engine switch on (IG) and turn the GTS on.

  6. Start the engine.

  7. Idle the engine for 10 seconds or more.

  8. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

  9. Read the pending DTCs.

    Tip:

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

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

  10. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

  11. Input the DTC: P0340, P0342, P0343, P0345, P0347 or P0348.

  12. 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
    Tip:

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

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

    • If the judgment result shows INCOMPLETE or N/A, perform the Confirmation Driving Pattern and check the DTC judgment result again.

WIRING DIAGRAM

A160377E11

CAUTION / NOTICE / HINT

Tip:

  • If no problem is found through this diagnostic troubleshooting procedure, there may be a mechanical problem with the engine.

  • 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 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.

PROCEDURE

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

    1. A194108C21

      *A

      Bank 1

      *B

      Bank 2

      *a

      Front view of wire harness connector

      (to VVT Sensor (for Intake Side))

      Disconnect the VVT sensor (for intake side) 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

      C60-3 (VC) - Body ground

      Engine switch on (IG)

      4.5 to 5.5 V

      C61-3 (VC) - Body ground

      Engine switch on (IG)

      4.5 to 5.5 V

    Result

    Proceed to

    OK

    NG
    NG

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

    OK

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

    1. Disconnect the C60 VVT sensor (for intake side of bank 1) connector.

    2. Disconnect the C61 VVT sensor (for intake side of bank 2) connector.

    3. Disconnect the C28 ECM connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      C60-1 (VVR+) - C28-9 (VV1+)

      Always

      Below 1 Ω

      C60-2 (VVR-) - C28-10 (VV1-)

      Always

      Below 1 Ω

      C61-1 (VVL+) - C28-12 (VV2+)

      Always

      Below 1 Ω

      C61-2 (VVL-) - C28-11 (VV2-)

      Always

      Below 1 Ω

      C60-1 (VVR+) or C28-9 (VV1+) - Body ground

      Always

      10 kΩ or higher

      C60-2 (VVR-) or C28-10 (VV1-) - Body ground

      Always

      10 kΩ or higher

      C61-1 (VVL+) or C28-12 (VV2+) - Body ground

      Always

      10 kΩ or higher

      C61-2 (VVL-) or C28-11 (VV2-) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    1. A295942E01

      Check the VVT sensor (for intake side) installation.

      OK

      VVT sensor is installed correctly.

    Result

    Proceed to

    OK

    NG
    NG

    REINSTALL VVT SENSOR (FOR INTAKE CAMSHAFT)

    Click here

    OK

  4. INSPECT CAMSHAFT TIMING GEAR ASSEMBLY (TEETH OF SENSOR PLATE)

    1. Inspect the teeth of the sensor plate.

      OK

      Sensor plate teeth do not have any cracks or deformation.

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE CAMSHAFT TIMING GEAR ASSEMBLY

    Click here

    OK

  5. CHECK VALVE TIMING (CHECK FOR LOOSE TIMING CHAIN AND JUMPED TEETH)

    1. Remove the cylinder head cover sub-assemblies RH and LH.

      Click here

      A294365C01

      *1

      Timing Mark

      -

      -

    2. Turn the crankshaft pulley and align its groove with the "0" timing mark on the timing chain cover.

    3. Check that the timing marks of the camshaft timing gear assemblies and camshaft timing exhaust gear assemblies are aligned with the timing marks of the bearing cap as shown in the illustration.

      Tip:

      If the timing marks are not as shown, turn the crankshaft one revolution clockwise.

      OK

      The timing marks on the camshaft timing gear assemblies and camshaft timing exhaust gear assemblies are aligned as shown in the illustration.

    Result

    Proceed to

    OK

    NG
    NG

    ADJUST VALVE TIMING

    Click here

    OK

  6. REPLACE VVT SENSOR (FOR INTAKE SIDE)

    1. Replace the VVT sensor (for intake side).

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  7. CHECK WHETHER DTC OUTPUT RECURS (DTC P0340, P0342, P0343, P0345, P0347 OR P0348)

    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs.

      Click here

      Powertrain > Engine and ECT > Clear DTCs

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

    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 and ECT / Trouble Codes.

      Powertrain > Engine and ECT > Clear DTCs

    10. Read the DTCs.

      Result

      Result

      Proceed to

      DTC P0340, P0342, P0343, P0345, P0347 or P0348 is output

      A

      DTC is not output

      B
      Tip:

      If the engine does not start, replace the ECM.

    A

    REPLACE ECM

    Click here

    B

    END

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

    1. Disconnect the C60 VVT sensor (for intake side of bank 1) connector.

    2. Disconnect the C61 VVT sensor (for intake side of bank 2) connector.

    3. Disconnect the C28 ECM connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      C60-3 (VC) - C28-15 (VCV1)

      Always

      Below 1 Ω

      C61-3 (VC) - C28-16 (VCV2)

      Always

      Below 1 Ω

      C60-3 (VC) or C28-15 (VCV1) - Body ground

      Always

      10 kΩ or higher

      C61-3 (VC) or C28-16 (VCV2) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE ECM

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR