SFI SYSTEM, Diagnostic DTC:P0340, P0342, P0343

DESCRIPTION

The camshaft position sensor for the intake camshaft (VV1 signal) consists of a magnet and MRE (Magneto Resistance 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 magnetic field. 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, and sends it to the ECM. Then the ECM uses this data to control fuel injection and injection timing.

• Reference: Inspection using an oscilloscope.

  

  Tech Tips

  • The correct waveform is as shown.

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

  ECM Terminal Name	CH1: Between VV1+ and VV1- CH2: Between EV1+ and EV1-
  Tester Range	5 V/DIV., 20 ms./DIV.
  Condition	Idling

MONITOR DESCRIPTION

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

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

COMPONENT OPERATING RANGE

CONFIRMATION DRIVING PATTERN

1. Connect the Techstream to the DLC3.

2. Turn the ignition switch to ON and turn the Techstream 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 Techstream 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.

    Techstream 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.

13. If no pending DTC is output, perform a universal trip and check for permanent DTCs Click here.

    Tech Tips

    • If a permanent DTC is output, the system is malfunctioning.

    • If no permanent DTC is output, the system is normal.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK TERMINAL VOLTAGE (POWER SOURCE OF CAMSHAFT POSITION SENSOR)

   1. Disconnect the camshaft position sensor for intake camshaft 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 E55-3 (VC) - Body ground Ignition switch ON 4.5 to 5.5 V

      Text in Illustration

      *a	Front view of wire harness connector (to Camshaft Position Sensor for Intake Camshaft)

   NG

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

   OK

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

   1. Disconnect the camshaft position sensor for intake camshaft 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 E55-1 (VV1+) - E26-82 (VV1+) Always Below 1 Ω E55-2 (VV1-) - E26-114 (VV1-) Always Below 1 Ω E55-1 (VV1+) or E26-82 (VV1+) - Body ground Always 10 kΩ or higher E55-2 (VV1-) or E26-114 (VV1-) - Body ground Always 10 kΩ or higher

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

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

   1. Check the camshaft position sensor for intake camshaft installation.

      

      OK
      Camshaft position sensor is installed correctly.

   NG

   SECURELY REINSTALL CAMSHAFT POSITION SENSOR Click here

   OK

4. INSPECT INTAKE CAMSHAFT (TIMING ROTOR)

   1. Check the timing rotor of the intake camshaft.

      OK
      Camshaft timing rotor does not have any cracks or deformation.

      Tech Tips

      Perform "Inspection After Repair" after replacing the intake camshaft Click here.

   NG

   REPLACE INTAKE CAMSHAFT Click here

   OK

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

   

   Text in Illustration

   *1

   Timing Mark

   -

   -

   1. Remove the cylinder head cover sub-assembly.

   2. Turn the crankshaft pulley and align its groove with the "0" timing mark of the timing chain cover.

   3. Check that the timing marks of the camshaft timing gear assembly and camshaft timing exhaust gear assembly are at the positions shown in the illustration.

      Tech Tips

      If the timing marks are not as shown, turn the crankshaft one revolution clockwise.

      OK
      Timing marks on camshaft timing gear assembly and camshaft timing exhaust gear assembly are aligned as shown in the illustration.

   NG

   ADJUST VALVE TIMING Click here

   OK

6. REPLACE CAMSHAFT POSITION SENSOR (FOR INTAKE CAMSHAFT)

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

   NEXT

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

   1. Connect the Techstream to the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the Techstream on.

   4. Clear the DTCs Click here.

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

   6. Start the engine.

   7. Turn the Techstream on.

   8. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

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

   10. Read the DTCs.

       Result

       Result	Proceed to
       DTC P0340, P0342 or P0343 is output	A
       DTC is not output	B

       Tech Tips

       If the engine does not start, replace the ECM.

   B

   END

   A

   REPLACE ECM Click here

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

   1. Disconnect the camshaft position sensor for intake camshaft 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 E55-3 (VC) - E26-113 (VCV1) Always Below 1 Ω E55-3 (VC) or E26-113 (VCV1) - Body ground Always 10 kΩ or higher

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

   REPLACE ECM Click here