SFI SYSTEM, Diagnostic DTC:P0340, P0342, P0343

DTC Code DTC Name
P0340 Camshaft Position Sensor Circuit
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)

DESCRIPTION

The camshaft position sensor (VV1 signal sensor) for the intake camshaft consists of a magnet and MRE (Magneto-Resistive Element).

The camshaft has a timing rotor for the camshaft position sensor. When the camshaft rotates, changes occur in the air gaps between the timing rotor and MRE, which affects the magnet. As a result, the resistance of the MRE material fluctuates. The camshaft position sensor converts the camshaft rotation data to pulse signals, uses the pulse signals to determine the camshaft angle, are 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

When one of the following conditions is met:


  • No camshaft position sensor signal to the ECM while cranking (2 trip detection logic).

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

  • A missing camshaft position sensor signal despite the crankshaft position sensor inputs being normal at an engine speed of 600 rpm or higher (1 trip detection logic).

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

  • Camshaft position sensor (for intake side)

  • Intake camshaft

  • Timing chain jumped tooth

  • ECM
P0342 The output voltage of the camshaft position sensor is below 0.3 V for 4 seconds (1 trip detection logic).

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

  • Camshaft position sensor (for intake side)

  • ECM
P0343 The output voltage is higher than 4.7 V for 4 seconds (1 trip detection logic).

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

  • Camshaft position sensor (for intake side)

  • ECM

Reference: Inspection using an oscilloscope.

A01XE8RE36
*a 5 V/DIV.
*b 20 ms./DIV.

Terminal No. (Symbol) Tool Setting Condition
C153-23 (VV1+) - C153-22 (VV1-) 5 V/DIV, 20 ms/DIV Idling
C153-24 (EV1+) - C153-32 (EV1-) 5 V/DIV, 20 ms/DIV Idling

MONITOR DESCRIPTION

If no signal is transmitted by the camshaft position sensor despite the camshaft revolving, 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 below 0.3 V, or higher than 4.7 V for 4 seconds or more, the ECM stores a DTC.

MONITOR STRATEGY

Required Sensors/Components (Main) Camshaft position sensor
Required Sensors/Components (Related) Crankshaft position sensor
Frequency of Operation Continuous

CONFIRMATION DRIVING PATTERN


  1. Connect the GTS to the DLC3.

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

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

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

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

  6. Start the engine.

  7. Idle the engine for 10 seconds or more [A].

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

  9. Read the 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.

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

  11. Input the DTC: P0340, P0342 or P0343.

  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

    Tech Tips


    • 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 steps [A] and [B] again.

WIRING DIAGRAM

A01XIGDE12

CAUTION / NOTICE / HINT

Tech Tips

Read freeze frame data using the GTS. Freeze frame data records the engine conditions when malfunctions are detected. 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 (SENSOR POWER SOURCE)


    1. A01XEN6E02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Camshaft Position Sensor (for Intake Side))

      Disconnect the camshaft position sensor (for intake side) connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      C139-3 (VC) - Body ground Ignition switch ON 4.5 to 5.5 V

    NG

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

    OK

  2. CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - ECM)


    1. Disconnect the camshaft position sensor (for intake side) connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C139-1 (VVI+) - C153-23 (VV1+) Always Below 1 Ω
      C139-2 (VVI-) - C153-22 (VV1-) Always Below 1 Ω
      C139-1 (VVI+) or C153-23(VV1+) - Body ground Always 10 kΩ or higher
      C139-2 (VVI-) or C153-22 (VV1-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR)


    1. B001H83E41
      *1 Clearance

      Check the camshaft position sensor (for intake side).

      OK
      Sensor is installed correctly.

    NG

    SECURELY REINSTALL SENSOR 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.

      Tech Tips

      Perform "Inspection After Repair" after replacing the camshaft timing gear assembly Click here.


    NG

    REPLACE CAMSHAFT TIMING GEAR ASSEMBLY Click here

    OK

  5. REPLACE CAMSHAFT POSITION SENSOR (FOR INTAKE SIDE)


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


    NEXT

  6. CHECK WHETHER DTC OUTPUT RECURS (DTC P0340, P0342 OR P0343)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs.

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

    6. Start the engine and idle it for 10 seconds or more.

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

    8. Read the DTCs.

      Result
      Result Proceed to
      P0340, P0342 or P0343 is output A
      No DTC is output B

      Tech Tips

      If the engine does not start, replace the ECM.


    B

    END

    A

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


    1. Check for mechanical malfunctions that affect the valve timing, such as a jumped tooth or stretching of the timing chain.


    NG

    CHECK ENGINE MECHANICAL SYSTEM Click here

    OK

  8. CHECK WHETHER DTC OUTPUT RECURS (DTC P0340, P0342 OR P0343)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs.

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

    6. Start the engine and idle it for 10 seconds or more.

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

    8. Read the DTCs.

      Result
      Result Proceed to
      P0340, P0342 or P0343 is output A
      No DTC is output B

      Tech Tips

      If the engine does not start, replace the ECM.


    A

    REPLACE ECM Click here

    B

    CHECK FOR INTERMITTENT PROBLEMS Click here

  9. CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR (FOR INTAKE SIDE) - ECM)


    1. Disconnect the camshaft position sensor (for intake side) connector.

    2. Disconnect the ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      C139-3 (VC) - C153-21 (VCV1) Always Below 1 Ω
      C139-3 (VC) or C153-21 (VCV1) - Body ground Always 10 kΩ or higher

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR