SFI SYSTEM(w/ Canister Pump Module), Diagnostic DTC:P1340, P1342, P1343

DTC Code DTC Name
P1340 Camshaft Position Sensor "A" (Bank 1 Sensor 2)
P1342 Camshaft Position Sensor "A" Low Input (MRE)
P1343 Camshaft Position Sensor "A" High Input (MRE)

DESCRIPTION

Tech Tips

Although the DTC titles say bank 1, these DTCs relate to the bank 2.

The camshaft position sensor system consists of a signal plate (installed on the camshaft timing gear assembly (bank 2)) and Magnetic Resistance Element (MRE) type camshaft position sensor. The signal plate has 3 protrusions. When it rotates, the magnetic vector (direction of magnetic field) applied to the camshaft's magnetic resistance element varies, which causes its resistance to vary. This varying resistance is converted to voltage, and then modified into a rectangular waveform with Hi (approximately 4 V) and Lo (approximately 1 V) outputs. As a result, the G2 signal is output to the ECM. The ECM uses the G2 signal to distinguish between the cylinders and detect the camshaft position.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P1340 Camshaft Position Sensor "A" (Bank 1 Sensor 2)

When one of the following conditions is met:


  • No camshaft position sensor signal to ECM during cranking (2 trip detection logic).

  • No camshaft position sensor signal to ECM in appropriate timing with 600 rpm or more (1 trip detection logic).

  • Missing camshaft position sensor signal despite crankshaft position sensor signal inputs normal at engine speed of 600 rpm or more (1 trip detection logic).

  • Open or short in camshaft position sensor circuit

  • Camshaft position sensor

  • Camshaft timing intake gear assembly (bank 2)

  • Valve timing

  • ECM

 Comes on DTC stored
P1342 Camshaft Position Sensor "A" Low Input (MRE) Output voltage of camshaft position sensor less than 0.3 V for 4 seconds (1 trip detection logic).

  • Open or short in camshaft position sensor circuit

  • Camshaft position sensor

  • ECM

 Comes on DTC stored
P1343 Camshaft Position Sensor "A" High Input (MRE) Output voltage of camshaft position sensor higher than 4.7 V for 4 seconds (1 trip detection logic).

  • Open or short in camshaft position sensor circuit

  • Camshaft position sensor

  • ECM

 Comes on DTC stored

MONITOR DESCRIPTION

If no signal is transmitted by the camshaft position 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 less than 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) Camshaft position sensor
Required sensors/Components (Related) Crankshaft position sensor
Frequency of Operation Continuous

CONFIRMATION DRIVING PATTERN


  1. Connect the GTS to the DLC3.

  2. Turn the engine switch on (IG).

  3. Turn the GTS on.

  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

    Click here

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

  6. Turn the engine switch on (IG).

  7. Turn the GTS on.

  8. Start the engine.

  9. Idle the engine for 10 seconds or more [A].

  10. Enter the following menus: Powertrain / Engine / Trouble Codes.

  11. Read the pending DTC [B].

    Tech Tips


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

    • If a pending DTC is not output, perform the following procedure.

  12. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

  13. Input the DTC: P1340, P1342 or P1343.

  14. 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 ABNORMAL, the system has a malfunction.

    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows INCOMPLETE or N/A, perform steps [A] and [B] again.

WIRING DIAGRAM

Click here

CAUTION / NOTICE / HINT

Tech Tips


  • Bank 1 refers to the bank that includes the No. 1 cylinder.*

    *: The No. 1 cylinder is the cylinder which is farthest from the transmission.

  • Bank 2 refers to the bank that does not include the No. 1 cylinder.

  • Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

PROCEDURE


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

    B002CDYC61
    *a

    Front view of wire harness connector

    (to Camshaft Position Sensor)

    1. Disconnect the camshaft position sensor connector.

    2. Turn the engine switch on (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      E37-3 (VC) - Body ground Engine switch on (IG) 4.5 to 5.5 V
      Result
      Proceed to
      OK
      NG

    NG

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

    OK

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


    1. Disconnect the E37 camshaft position sensor connector.

    2. Disconnect the E1 ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      E37-1 (G22+) - E1-18 (G2+) Always Below 1 Ω
      E37-2 (G22-) - E1-28 (G2-) Always Below 1 Ω
      E37-1 (G22+) or E1-18 (G2+) - Body ground Always 10 kΩ or higher
      E37-2 (G22-) or E1-28 (G2-) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK SENSOR INSTALLATION (CRANKSHAFT POSITION SENSOR)

    B002DHSC08
    *a OK
    *b NG
    *c Clearance

    1. Check the crankshaft position sensor installation.

      OK
      Crankshaft position sensor is installed correctly.
      Result
      Proceed to
      OK
      NG

    NG

    SECURELY REINSTALL CRANKSHAFT POSITION SENSOR Click here

    OK

  4. INSPECT CAMSHAFT TIMING INTAKE GEAR ASSEMBLY LH (BANK 2)


    1. Check the teeth of the sensor plate, and check that the sensor plate is correctly installed.

      OK
      Sensor plate teeth do not have any cracks or deformation, and sensor plate is correctly installed.

      Tech Tips

      Perform "Inspection After Repair" after repairing or replacing the camshaft timing intake gear assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE CAMSHAFT TIMING INTAKE GEAR ASSEMBLY LH (BANK 2) Click here

    OK

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

    Result
    Proceed to
    OK
    NG
    B002EZUC03
    *a Timing Mark *b Approximately 68°
    *c Approximately 16° *d Approximately 32°
    *e Approximately 50° - -

    1. Remove the cylinder head cover sub-assembly.

      Click here

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

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

      OK
      The timing marks on the camshaft timing intake gear assemblies are aligned as shown in the illustration.

      Tech Tips


      • If the result is not as specified, check for mechanical malfunctions that may have affected the valve timing, such as a jumped tooth or stretching of the timing chain.

      • When checking the valve timing, make sure the camshaft timing intake gear assemblies are set to the most retarded position and the camshaft timing exhaust gear assemblies are set to the most advanced position. When the VVT system is normal and the engine is stopped, the camshaft timing intake gear assemblies stop at the center of their operation range and the camshaft timing exhaust gear assemblies stop at the most advanced position.

      Result
      Proceed to
      OK
      NG

    NG

    CHECK ENGINE MECHANICAL SYSTEM Click here

    OK

  6. REPLACE CAMSHAFT POSITION SENSOR


    1. Replace the camshaft position sensor.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  7. CHECK WHETHER DTC OUTPUT RECURS (DTC P1340, P1342 AND P1343)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

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

    6. Start the engine and warm it up.

    7. Turn the GTS on.

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

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


      Powertrain > Engine > Trouble Codes

    10. Read the pending DTCs.

      Result
      Result Proceed to
      DTCs are not output A
      DTC P1340, P1342 and/or P1343 is output B

      Tech Tips

      If the engine does not start, replace the ECM.


    A

    END

    B

    REPLACE ECM Click here

  8. CHECK ENGINE MECHANICAL SYSTEM


    1. Check for mechanical malfunctions that affect the valve timing, such as a jumped tooth or stretching of the timing chain.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

    OK

  9. CHECK WHETHER DTC OUTPUT RECURS (DTC P1340, P1342 AND P1343)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

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

    6. Start the engine and warm it up.

    7. Turn the GTS on.

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

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


      Powertrain > Engine > Trouble Codes

    10. Read the pending DTCs.

      Result
      Result Proceed to
      DTCs are not output A
      DTC P1340, P1342 and/or P1343 is output B

      Tech Tips

      If the engine does not start, replace the ECM.


    A

    REPLACE ECM Click here

    B

    CHECK FOR INTERMITTENT PROBLEMS Click here

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


    1. Disconnect the E37 camshaft position sensor connector.

    2. Disconnect the E2 ECM connector.

    3. Disconnect the c1 crankshaft position sensor connector.

    4. Disconnect the E21, E27, E16 and E29 VVT sensor (for intake camshaft and exhaust camshaft) connectors.

    5. Disconnect the U34 canister pump module connector.

    6. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      E37-3 (VC) - E2-26 (VC) Always Below 1 Ω
      E37-3 (VC) or E2-26 (VC) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR