SFI SYSTEM(w/ EGR 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 intake camshaft VVT sensor (VV1 and VV2 signal) consists of a magnet and MRE (Magnetoresistive Element).

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

The crankshaft angle sensor rotor has 34 teeth. The MRE generates 34 signals for each crankshaft revolution. Based on a combination of the VVT signal and NE signal, the ECM detects the crankshaft angle. Then the ECM uses this data to control fuel injection time and injection timing. Also, based on the NE signal, the ECM detects the engine speed.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Memory

P0340

Camshaft Position Sensor Circuit Malfunction

No VVT sensor signal is sent to the ECM at an 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

  • Intake camshaft

  • Timing chain for intake camshaft jumped tooth

  • ECM

Comes on

DTC stored

P0342

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

Output voltage of VVT sensor is below 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

  • Intake camshaft

  • Timing chain for intake camshaft jumped tooth

  • ECM

Comes on

DTC stored

P0343

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

Output voltage of VVT sensor is higher 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

  • Intake camshaft

  • Timing chain for intake camshaft jumped tooth

  • ECM

Comes on

DTC stored

P0345

Camshaft Position Sensor "A" Circuit (Bank 2)

No VVT sensor signal is sent to the ECM at an 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

  • Intake camshaft

  • Timing chain for intake camshaft jumped tooth

  • ECM

Comes on

DTC stored

P0347

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

Output voltage of VVT sensor is below 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

  • Intake camshaft

  • Timing chain for intake camshaft jumped tooth

  • ECM

Comes on

DTC stored

P0348

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

Output voltage of VVT sensor is higher 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

  • Intake camshaft

  • Timing chain for intake camshaft jumped tooth

  • ECM

Comes on

DTC stored
  • A217926E06

    Reference: Inspection using an oscilloscope

    Standard

    Tester Connection

    Tool Setting

    Condition

    Specified Condition

    C28-6 (NE+) - C28-5 (NE-)

    5 V/DIV.

    20 msec./DIV.

    Cranking or idling

    The correct waveform is as shown

    C28-7 (VV1+) - C28-8 (VV1-)

    5 V/DIV.

    20 msec./DIV.

    Cranking or idling

    The correct waveform is as shown

    C28-12 (VV2+) - C28-11 (VV2-)

    5 V/DIV.

    20 msec./DIV.

    Cranking or idling

    The correct waveform is as shown
    Tip:

    VV1 and VV2 are the VVT sensor signals, and NE is the crankshaft position sensor signal.

MONITOR DESCRIPTION

If no signal is transmitted by the VVT sensor despite the engine running, or the rotations of the camshaft and crankshaft are 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 more than 4 seconds, the ECM stores a DTC.

MONITOR STRATEGY

Required Sensors/Components (Main)

VVT position sensor (for Bank 1 and 2)

Required Sensors/Components (Related)

Crankshaft position sensor

Frequency of Operation

Continuous

CONFIRMATION DRIVING PATTERN

  1. Start the engine and run it at idle for 10 seconds or more.

WIRING DIAGRAM

A232652E03

CAUTION / NOTICE / HINT

Tip:

Read freeze frame data using the intelligent tester. 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 HARNESS AND CONNECTOR (SENSOR POWER SOURCE)

    1. A186169C02

      *A

      Bank 1

      *B

      Bank 2

      *a

      Front view of wire harness connector

      (to VVT Sensor)

      Disconnect the VVT sensor connector.

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

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      3 (VC) - Body ground

      Engine switch on (IG)

      4.5 to 5.0 V

      Result

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK HARNESS AND CONNECTOR (VVT SENSOR FOR INTAKE CAMSHAFT - 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

      Tester Connection

      Condition

      Specified Condition

      C15-1 (VVL+) - C28-7 (VV1+)

      Always

      Below 1 Ω

      C15-2 (VVL-) - C28-8 (VV1-)

      Always

      Below 1 Ω

      C14-1 (VVR+) - C28-12 (VV2+)

      Always

      Below 1 Ω

      C14-2 (VVR-) - C28-11 (VV2-)

      Always

      Below 1 Ω

      C15-1 (VVL+) or C28-7 (VV1+) - Body ground

      Always

      10 kΩ or higher

      C15-2 (VVL-) or C28-8 (VV1-) - Body ground

      Always

      10 kΩ or higher

      C14-1 (VVR+) or C28-12 (VV2+) - Body ground

      Always

      10 kΩ or higher

      C14-2 (VVR-) or C28-11 (VV2-) - Body ground

      Always

      10 kΩ or higher

      Result

      Result

      OK

      NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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

    1. BR03795E98

      Check the VVT sensor installation.

      OK

      Sensor is installed correctly.

      Result

      Result

      OK

      NG
    NG

    SECURELY REINSTALL SENSOR

    Click here

    OK

  4. INSPECT INTAKE CAMSHAFT (TEETH)

    1. Check the teeth of the camshaft.

      OK

      Teeth do not have any cracks or deformation.

      Result

      Result

      OK

      NG
    NG

    REPLACE INTAKE CAMSHAFT

    Click here

    OK

  5. REPLACE VVT SENSOR

    1. Replace the VVT sensor.

      Click here

      Result

      Result

      NEXT
    NEXT

  6. CHECK WHETHER DTC OUTPUT RECURS

    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the tester on.

    4. Clear the DTCs.

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

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

    7. Read DTCs.

      Powertrain > Engine and ECT > Trouble Codes

      Result

      Result

      Proceed to

      No DTC is output

      A

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

      B
      Tip:

      If the engine does not start, replace the ECM.

    Powertrain > Engine and ECT > Clear DTCs

    A

    END

    B

    REPLACE ECM

    Click here