SFI SYSTEM, 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

The camshaft position sensor (G signal) consists of a magnet and MRE (Magnetic Resistance Element).

The camshaft drive gear (LH) has 3 teeth on its inner circumstance. When the camshaft gear rotates, air gap changes between the protrusion on the teeth and the MRE. The change affects the magnetic field and results in changes in the resistance of the MRE.

The crankshaft position sensor plate has 34 teeth and is installed to the rear end of the crankshaft. The crankshaft position sensor generates 34 signals with every revolution. The ECM detects the standard crankshaft angle based on the G signal, and the actual crankshaft angle and engine speed by the NE signal.

DTC Code DTC Detection Condition Trouble Area
P1340 No camshaft position sensor signal is sent to the ECM during cranking (2 trip detection logic).

  • Open or short in camshaft position sensor circuit

  • Camshaft position sensor

  • Camshaft timing plate LH

  • ECM
No camshaft position sensor signal is sent to the ECM with an engine speed of 600 rpm or more.
P1342 The output voltage of the camshaft position sensor is below 0.3 V for 4 seconds (1 trip detection logic).
P1343 The output voltage of the camshaft position sensor is higher than 4.7 V for 4 seconds (1 trip detection logic).

MONITOR DESCRIPTION

The camshaft position sensor (G signal) consists of a magnet and MRE.

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

WIRING DIAGRAM

A01EONNE03

INSPECTION PROCEDURE

Tech Tips

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 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. INSPECT CAMSHAFT POSITION SENSOR (SENSOR POWER SOURCE)

    A01ENZRE88

    1. Disconnect the C2 camshaft position sensor connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      C2-3 (VC) - Body ground Engine switch on (IG) 4.5 to 5.0 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the C2 camshaft position sensor connector.

    2. Disconnect the C53 or C54 ECM connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      C2-1 (G2) - C53-90 (G2) Always Below 1 Ω
      C2-2 (G-) - C53-89 (G2-) Always Below 1 Ω
      C2-1 (G2) or C53-90 (G2) - Body ground Always 10 kΩ or higher
      C2-2 (G-) or C53-89 (G2-) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      C2-1 (G2) - C54-90 (G2) Always Below 1 Ω
      C2-2 (G-) - C54-89 (G2-) Always Below 1 Ω
      C2-1 (G2) or C54-90 (G2) - Body ground Always 10 kΩ or higher
      C2-2 (G-) or C54-89 (G2-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT SENSOR INSTALLATION

    A01EOGXE62

    1. Check the camshaft position sensor installation.

      OK
      The camshaft position sensor is installed properly.

    NG

    SECURELY REINSTALL SENSOR Click here

    OK

  4. INSPECT CAMSHAFT TIMING PLATE (SIGNAL PLATE TOOTH)


    1. Check the teeth of the signal plate.

      OK
      Sensor plate teeth do not have any cracks or deformation.

    NG

    REPLACE CAMSHAFT TIMING PLATE Click here

    OK

  5. REPLACE CAMSHAFT POSITION SENSOR


    1. Replace the camshaft position sensor Click here.


    NEXT

  6. CONFIRM 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 DTCs Click here.

    5. Start the engine.

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

    7. Read DTCs.

      Result
      Result Proceed to
      No DTC is output A
      P1340, P1342 and/or P1343 are output B

      Tech Tips

      If the engine does not start, replace the ECM.


    B

    REPLACE ECM Click here

    A

    END