ECD SYSTEM, Diagnostic DTC:P0342, P0343

DTC Code DTC Name
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)

DESCRIPTION

Refer to DTC P0016 Click here.

P0342
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch ON for 4 seconds or more

Output voltage of camshaft position sensor is less than 0.3 V for 4 seconds.

(1 trip detection logic)

  • Open or short in camshaft position sensor circuit

  • Camshaft position sensor

  • ECM
P0343
DTC Detection Drive Pattern DTC Detection Condition Trouble Area
Ignition switch ON for 4 seconds or more

Output voltage of camshaft position sensor is higher than 4.7 V for 4 seconds.

(1 trip detection logic)

  • Open or short in camshaft position sensor circuit

  • Camshaft position sensor

  • ECM

Tech Tips


  • If DTC P0342 or P0343 is stored, the following symptoms may appear:


    • Difficulty starting

    • Misfire

    • Combustion noise

    • Black smoke

    • White smoke

    • Lack of power

  • A003D6VE01

    Reference: Inspection using an oscilloscope.

    The correct waveform is as shown.

    ECM Terminal Name

    Between G2+ and G2-

    Between NE+ and NE-
    Tester Range 2 V/DIV., 20 msec./DIV.
    Condition Idling with warm engine

MONITOR DESCRIPTION

When the sensor output voltage remains at less than 0.3 V, or higher than 4.7 V for 4 seconds, the ECM stores a DTC.

WIRING DIAGRAM

Refer to DTC P0016 Click here.

INSPECTION PROCEDURE

Note

After replacing the ECM, the new ECM needs registration Click here and initialization Click here.

Tech Tips

Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.

PROCEDURE


  1. CHECK DTC OUTPUT


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

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

    4. Clear the DTCs Click here.

    5. Turn the ignition switch off for 30 seconds or more.

    6. Disconnect the camshaft position sensor connector.

    7. Turn the ignition switch to ON for 4 seconds or more.

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

    9. Check whether the DTC changes when the connector is disconnected and connected.

      Result
      Result Proceed to
      DTC does not change A
      DTC changes B

    B

    REPLACE CAMSHAFT POSITION SENSOR Click here

    A

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


    1. Disconnect the camshaft position sensor 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
      D128-3 (VC) - D134-111 (VCG) Always Below 1 Ω
      D128-1 (G22+) - D134-78 (G2+) Always Below 1 Ω
      D128-2 (G22-) - C134-77 (G2-) Always Below 1 Ω
      D128-3 (VC) - D134-111 (VCG) - Body ground and other terminals Always 10 kΩ or higher
      D128-1 (G22+) or D134-78 (G2+) - Body ground and other terminals Always 10 kΩ or higher
      D128-2 (G22-) or D134-77 (G2-) - Body ground and other terminals Always 10 kΩ or higher

    4. Reconnect the camshaft position sensor connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  3. CHECK ECM (CAMSHAFT POSITION SENSOR VOLTAGE)


    1. A003D0YE04
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Camshaft Position Sensor)

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

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      D128-3 (VC) - D128-2 (G22-) Ignition switch ON 4.5 to 5.5 V

    NG

    REPLACE ECM Click here

    OK

  4. CHECK ECM (CHECK RESISTANCE)


    1. A003D0YE04
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Camshaft Position Sensor)

      Disconnect the camshaft position sensor connector.

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

      Standard resistance
      Tester Connection Condition Specified Condition
      D128-3 (VC) - D128-1 (G22+) Ignition switch off No short or no open circuit
      D128-1 (G22+) - D128-2 (G22-) Ignition switch off No short or no open circuit

    3. Reconnect the camshaft position sensor connector.


    NG

    REPLACE ECM Click here

    OK

  5. REPLACE CAMSHAFT POSITION SENSOR


    1. Replace the camshaft position sensor Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  6. REPAIR OR REPLACE HARNESS OR CONNECTOR


    1. Repair or replace the harness or connector.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  7. REPLACE ECM


    1. Replace the ECM Click here.


    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED Click here

  8. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

    3. Clear the DTCs Click here.

    4. Turn the ignition switch off for 30 seconds or more.

    5. Turn the ignition switch to ON for 4 seconds or more.

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

    7. Confirm that the DTC is not output.


    NEXT

    END