SFI SYSTEM (w/ Dual VVT-i), Diagnostic DTC:P0340, P0342, P0343

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.

Reference: Inspection using an oscilloscope.

• The correct waveform is as shown.

• VV1 stands for the camshaft position sensor (for intake side) signal and EV1 stands for the camshaft position sensor (for exhaust side) signal.

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

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

INSPECTION PROCEDURE

PROCEDURE

1. CHECK TERMINAL VOLTAGE (SENSOR POWER SOURCE)

   
   
   1. 

      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 D110-3 (VC) - Body ground Ignition switch ON 4.5 to 5.5 V

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   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 D110-1 (VVI+) - D116-82 (VV1+) Always Below 1 Ω D110-2 (VVI-) - D116-115 (VV1-) Always Below 1 Ω D110-1 (VVI+) or D116-82 (VV1+) - Body ground Always 10 kΩ or higher D110-2 (VVI-) or D116-115 (VV1-) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

3. CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR)

   
   

   1. 

      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)

   
   

   1. Check the teeth of the camshaft timing gear assembly.

      OK
      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

   
   

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

   
   

   NEXT

6. CHECK WHETHER DTC OUTPUT RECURS

   
   

   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
      No DTC is output	A
      P0340, P0342 or P0343 is output	B

      Tech Tips

      If the engine does not start, replace the ECM.

   
   

   B

   REPLACE ECM Click here

   A

   END