ECD SYSTEM(w/ Glow Plug Controller), Diagnostic DTC:P0340,P0342,P0343 and P0344

DTC Code DTC Name
P0340 Camshaft Position Sensor Circuit
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)
P0344 Camshaft Position Sensor "A" Circuit Intermittent (Bank 1 or Single Sensor)

DESCRIPTION

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

The camshaft timing gear has a crankshaft position sensor plate for the camshaft position sensor. When the camshaft rotates, changes occur in the air gaps between the sensor plate 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 time and injection timing.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P0340

Camshaft Position Sensor Circuit

Either of following conditions is met:

(1 trip detection logic)

  • No camshaft position sensor signal to ECM

  • Phase deviation in crankshaft and camshaft position sensor signals

  • Open or short in camshaft position sensor circuit

  • Camshaft position sensor

  • Crankshaft position sensor plate

  • ECM

Comes on

DTC stored

P0342

Camshaft Position Sensor "A" Circuit Low Input (Bank 1 or Single Sensor)

Output voltage of camshaft position sensor is below 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

P0343

Camshaft Position Sensor "A" Circuit High Input (Bank 1 or Single Sensor)

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

Comes on

DTC stored

P0344

Camshaft Position Sensor "A" Circuit Intermittent (Bank 1 or Single Sensor)

Wrong pattern of signal from camshaft position sensor is detected

(1 trip detection logic)

  • Open or short in camshaft position sensor circuit

  • Camshaft position sensor

  • Crankshaft position sensor plate

  • Valve timing

  • ECM

Comes on

DTC stored
Table 1. DTC Detection Drive Pattern

DTC No.

DTC Detection Drive Pattern

P0340

Engine cranks 4 revolutions or more

P0342

Idle engine for 4 seconds

P0343

Idle engine for 4 seconds

P0344

Engine cranks 6 revolutions or more

WIRING DIAGRAM

Refer to DTC P0335.

Click here

CAUTION / NOTICE / HINT

Note:

When replacing the ECM, perform ECM Initialization and Registration.

Click here

Tip:

  • When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing a new ECM, perform all of the initialization and registration procedures for the "Learning Values Write" function by following the instructions shown on the GTS display.

  • 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 TERMINAL VOLTAGE (POWER SOURCE OF CAMSHAFT POSITION SENSOR)

    A186169C07

    *a

    Front view of wire harness connector

    (to Camshaft Position Sensor)

    1. Disconnect the camshaft position sensor 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

      Condition

      Specified Condition

      B117-3 (VG) - Body ground

      Ignition switch ON

      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 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

      B117-1 (G1) - B212-83 (G+)

      Always

      Below 1 Ω

      B117-2 (G-) - B212-115 (G-)

      Always

      Below 1 Ω

      B117-1 (G1) or B212-83 (G+) - Body ground and other terminals

      Always

      10 kΩ or higher

      B117-2 (G-) or B212-115 (G-) - Body ground and other terminals

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTORClick here

    OK

  3. CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR)

    B322410C02

    *a

    OK

    *b

    NG

    *c

    Clearance

    1. Check the camshaft position sensor installation.

      OK

      Sensor is installed correctly.

    Result

    Proceed to

    OK

    NG
    NG

    SECURELY REINSTALL SENSORClick here

    OK

  4. CHECK CRANKSHAFT POSITION SENSOR PLATE

    1. Check the crankshaft position sensor plate.

      OK

      Sensor plate does not have any cracks or deformation.

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE CRANKSHAFT POSITION SENSOR PLATEClick here

    OK

  5. REPLACE CAMSHAFT POSITION SENSOR

    1. Replace the camshaft position sensor.

      Click hereClick here

    Result

    Proceed to

    NEXT
    NEXT

  6. CHECK WHETHER DTC OUTPUT RECURS (DTC P0340, P0342, P0343 AND/OR P0344)

    1. Connect the GTS to the DLC3.

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

    3. Clear the DTCs.

      Powertrain > Engine and ECT > Clear DTCs

    4. Start the engine.

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

    6. Read the DTCs.

      Powertrain > Engine and ECT > Trouble Codes

      Result

      Result

      Proceed to

      DTC P0340, P0342, P0343 and/or P0344 is output

      A

      DTC is not output

      B
    B

    END

    A

  7. ADJUST VALVE TIMING

    1. Adjust the valve timing.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

    CHECK WHETHER DTC OUTPUT RECURS (DTC P0340, P0342, P0343 AND/OR P0344)Click here

  8. REPLACE CRANKSHAFT POSITION SENSOR PLATE

    1. Replace the crankshaft position sensor plate.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

    CHECK WHETHER DTC OUTPUT RECURS (DTC P0340, P0342, P0343 AND/OR P0344)Click here

  9. SECURELY REINSTALL SENSOR

    1. Securely reinstall the camshaft position sensor.

      Click hereClick here

    Result

    Proceed to

    NEXT
    NEXT

    CHECK WHETHER DTC OUTPUT RECURS (DTC P0340, P0342, P0343 AND/OR P0344)Click here

  10. 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

      B117-3 (VG) - B212-68 (VCG)

      Always

      Below 1 Ω

      B117-3 (VG) or B212-68 (VCG) - Body ground and other terminals

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    CHECK WHETHER DTC OUTPUT RECURS (DTC P0340, P0342, P0343 AND/OR P0344)Click here

    NG

  11. REPAIR OR REPLACE HARNESS OR CONNECTOR

    Result

    Proceed to

    NEXT
    NEXT

  12. CHECK WHETHER DTC OUTPUT RECURS (DTC P0340, P0342, P0343 AND/OR P0344)

    1. Connect the GTS to the DLC3.

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

    3. Clear the DTCs.

      Powertrain > Engine and ECT > Clear DTCs

    4. Start the engine.

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

    6. Read the DTCs.

      Powertrain > Engine and ECT > Trouble Codes

      Result

      Result

      Proceed to

      DTC P0340, P0342, P0343 and/or P0344 is output

      A

      DTC is not output

      B
    B

    END

    A

  13. REPLACE ECM

    1. Replace the ECM.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  14. 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.

      Powertrain > Engine and ECT > Clear DTCs

    4. Start the engine.

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

    6. Confirm that the DTC is not output again.

      Powertrain > Engine and ECT > Trouble Codes

    Result

    Proceed to

    NEXT
    NEXT

    END