СИСТЕМА SFI, Diagnostic DTC:P0340, P0342, P0343, P0345, P0347, 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 camshaft position sensor (G) signal consists of a magnet and MRE element.

The camshaft drive gear has 3 teeth on its inner circumference. When the camshaft gear rotates, changes occur in the air gaps between the protrusion on the gear and the pickup coil. The change affects the magnetic field and results in changes in the resistance of the MRE element. The crankshaft angle sensor plate has 34 teeth and outputs 34 signals every engine revolution. The ECM detects the standard crankshaft angle based on the G signal, and actual crankshaft angle and engine speed based on the crankshaft position sensor (NE) signal.

DTC No. DTC Detection Condition Trouble Area

P0340

P0345

STA ON:

No camshaft position sensor signal to ECM during cranking for 4 seconds or more

STA OFF:

No camshaft position sensor signal to ECM with engine speed 600 or more

  • Open or short in VVT sensor circuit

  • VVT sensor

  • Camshaft timing gear

  • Jumped tooth of timing chain

  • ECM

P0342

P0347

Output voltage of Variable Valve Timing (VVT) sensor 0.3 V or less for 5 seconds

(1 trip detection logic)

  • Open or short in VVT sensor circuit

  • VVT sensor

  • Camshaft timing gear

  • Jumped tooth of timing chain

  • ECM

P0343

P0348

Output voltage of VVT sensor 4.7 V or more for 5 seconds

(1 trip detection logic)

  • Open or short in VVT sensor circuit

  • VVT sensor

  • Camshaft timing gear

  • Jumped tooth of timing chain

  • ECM

WIRING DIAGRAM

Refer to DTC P0335 Click here.

INSPECTION PROCEDURE

Tech Tips

Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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 ECM (VV1, VV2, NE WAVEFORM)

    A01J6R7E02

    1. Inspect using an oscilloscope.


      1. While the engine is idling, check the waveform of the ECM connector.

        OK
        Tester Connection Specified Condition

        E17-19 (VV1+) - E17-29 (VV1-)

        E17-18 (VV2+) - E17-28 (VV2-)

        E17-21 (NE+) - E17-20 (NE-)

        		 Correct waveform is as shown
        Tool Setting Condition
        5 V/DIV., 20 msec./DIV. Idling

    NG

    REPLACE VVT SENSOR

    OK

  2. CHECK WIRE HARNESS (SENSOR POWER SOURCE)

    A01J308E02

    1. Disconnect the C20 and C21 VVT sensor connectors.

    2. Turn the ignition switch ON.

    3. Measure the voltage of the wire harness side connectors.

      Standard voltage
      Tester Connection Specified Condition
      C20-3 (VC) - Body ground 4.5 to 5.5 V
      C21-3 (VC) - Body ground 4.5 to 5.5 V

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  3. CHECK WIRE HARNESS (VVT SENSOR - ECM)

    A01J48JE02

    1. Disconnect the C20 and C21 VVT sensor connectors.

    2. Disconnect the E17 ECM connector.

    3. Measure the resistance of the wire harness side connectors.

      Standard resistance
      Bank 1
      Tester Connection Specified Condition
      C21-1 (VVR+) - E17-19 (VV1+) Below 1 Ω
      C21-2 (VVR-) - E17-29 (VV1-) Below 1 Ω
      C21-1 (VVR+) or E17-19 (VV1+) - Body ground 10 kΩ or higher
      C21-2 (VVR-) or E17-29 (VV1-) - Body ground 10 kΩ or higher
      Bank 2
      Tester Connection Specified Condition
      C20-1 (VVL+) - E17-18 (VV2+) Below 1 Ω
      C20-2 (VVL-) - E17-28 (VV2-) Below 1 Ω
      C20-1 (VVL+) or E17-18 (VV2+) - Body ground 10 kΩ or higher
      C20-2 (VVL-) or E17-28 (VV2-) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS AND CONNECTOR

    OK

  4. CHECK VVT SENSOR (INSTALLATION)

    A01J7ICE30

    1. Check the VVT sensor installation.

      OK
      Sensor is installed correctly.

    NG

    SECURELY REINSTALL VVT SENSOR

    OK

  5. CHECK CAMSHAFT TIMING GEAR ASSEMBLY (TEETH OF PLATE)


    1. Check the teeth of the signal plate.

      OK
      Signal plate does not have cracks or deformation.

    NG

    REPLACE CAMSHAFT TIMING GEAR ASSEMBLY

    OK

    REPLACE VVT SENSOR