SFI SYSTEM, Diagnostic DTC:P0341, P0342, P0343

DTC Code DTC Name
P0341 Camshaft Position Sensor "A" Circuit Range / Performance (Bank 1 or Single Sensor)
P0342 Camshaft Position Sensor Circuit Low Input
P0343 Camshaft Position Sensor Circuit High Input

DESCRIPTION

The camshaft position sensor consists of a magnet and an iron core which is wrapped with copper wire, and is installed on the cylinder head. When the camshaft rotates, each of 3 teeth on the camshaft passes through the camshaft position sensor. This activates the internal magnet in the sensor, generating a voltage in the copper wire. The camshaft rotation is synchronized with the crankshaft rotation. When the crankshaft turns twice, the voltage is generated 3 times in the camshaft position sensor. The generated voltage in the sensor acts as a signal, allowing the ECM to locate the camshaft position. This signal is then used to control ignition timing, fuel injection timing, and the VVT system.

DTC No. DTC Detection Condition Trouble Area
P0341 Abnormal pulse of camshaft position sensor occurs 12 times or more in 1 driving cycle (3 trip detection logic)

  • Open or short in camshaft position sensor circuit

  • Camshaft position sensor

  • Camshaft

  • ECM
P0342 Camshaft position sensor output stays low (3 trip detection logic)

  • Short in camshaft position sensor circuit

  • Camshaft position sensor

  • Camshaft

  • ECM
P0343 Camshaft position sensor output stays high (3 trip detection logic)

  • Open in camshaft position sensor circuit

  • Short in power source circuit

  • Camshaft position sensor

  • Camshaft

  • ECM

Reference: Inspection using an oscilloscope.

Tech Tips

G2 is the camshaft position sensor signal, and NE is the crankshaft position sensor signal.

A01VLDCE24
*a 5 V/DIV
*b 20 ms/DIV
Standard
Tester Connection Tool Setting Condition Specified Condition
B87-6 (NE+) - B87-5 (NE-) 5 V/DIV, 20 ms/DIV Cranking or idling The correct waveform is as shown
B87-57 (G2+) - B87-58 (G2-) 5 V/DIV, 20 ms/DIV Cranking or idling The correct waveform is as shown

Tech Tips

These DTCs are detected when the engine is running or the engine cranks 12 revolutions or more.

WIRING DIAGRAM

A01VK33E01

CAUTION / NOTICE / HINT

Note

Perform electronic throttle learning after replacing the ECM Click here.

Tech Tips

Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition 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 HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - ECM)


    1. Disconnect the camshaft position sensor 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
      B90-2 (VV1+) - B87-57 (G2+) Always Below 1 Ω
      B90-1 (VV1-) - B87-58 (G2-) Always Below 1 Ω
      B90-3 (VC) - B87-80 (VC) Always Below 1 Ω
      B90-2 (VV1+) or B87-57 (G2+) - Body ground Always 10 kΩ or higher
      B90-1 (VV1-) or B87-58 (G2-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT CAMSHAFT POSITION SENSOR (SENSOR INSTALLATION)


    1. Check the sensor installation.

      OK
      The sensor is installed correctly.

    NG

    SECURELY REINSTALL SENSOR

    OK

  3. INSPECT CAMSHAFT


    1. Check the teeth of the camshaft.

      OK
      The teeth do not have any cracks or deformation.

    NG

    REPLACE CAMSHAFT Click here

    OK

  4. REPLACE CAMSHAFT POSITION SENSOR


    1. Replace camshaft position sensor Click here.


    NEXT

  5. CHECK WHETHER DTC OUTPUT RECURS (DTC P0341, P0342 OR P0343)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the tester on.

    4. Clear DTCs Click here.

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

    6. Turn the ignition switch to ON.

    7. Turn the tester on.

    8. Start the engine.

    9. Stop the engine and wait for at least 10 seconds.

    10. Enter the following menus: Powertrain / Engine and ECT / DTC.

    11. Read the pending DTCs.

      Result
      Result Proceed to
      DTC is not output A
      DTC P0341, P0342 or P0343 is output B

    A

    END

    B

    REPLACE ECM Click here