ECD SYSTEM, Diagnostic DTC:P0341, P0343

DTC Code DTC Name
P0341 Open, Short or No Signal in Camshaft Position Sensor Circuit
P0343 Camshaft Position Sensor Range / Performance

DESCRIPTION

The camshaft position sensor is installed on the camshaft housing. It is a Hall-effect type sensor. When the signal-detecting portion on the camshaft drive pulley passes in front of the camshaft position sensor, the air gap between the sensor and the signal-detecting position changes. The camshaft position sensor converts this change into a signal and sends it to the ECM.

The ECM needs a cylinder reference in order to phase the injection actuation in sequential mode (cylinder by cylinder, in the 1-3-4-2 order).

A0137C8E02
DTC No. DTC Detection Condition Trouble Area Possible to Detect
Ignition Switch Engine Run
P0341

Either the following conditions (a) or (b) is met:

(a) No camshaft position sensor signal.

(b) Open or short circuit in camshaft position sensor circuit.

  • Camshaft position sensor

  • Camshaft position sensor circuit

  • Camshaft drive pulley

  • ECM

 ON ON
P0343 Changes in the camshaft position sensor signal level take place outside the calibrated windows (Badly position in relation to the crankshaft position sensor signal.).

  • Camshaft position sensor

  • Camshaft position sensor circuit

  • Camshaft drive pulley

  • ECM

 ON ON

FAIL-SAFE

DTC No. Fail-safe Operation Fail-safe Deactivation Condition
P0341 Difficult to start. Ignition switch OFF.
P0343 Difficult to start. Ignition switch OFF.

WIRING DIAGRAM

A0138BKE01

INSPECTION PROCEDURE

Tech Tips


  • When DTC P0341 or P0343 is detected and the engine is started, check the synchronization between camshaft and the crankshaft by selecting the following menu items on the intelligent tester: Powertrain / Engine and ECT / Data List / Synchro Cam-Crank.

  • If the ECM is replaced, variant coding (variant coding indicates the presence of vehicle accessory items, A/C, etc.) should always be performed Click here.

  • Before removing the ECM and the peripheral parts, wait at least 3 minute after turning the ignition switch off (If the cooling fan is operating, remove the ECM and the peripheral parts after the fan stops.).

PROCEDURE


  1. CHECK DTC OUTPUT (OTHER THAN P0341AND/OR P0343)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the ignition switch to the ON position and turn the intelligent tester on.

    3. Select the following menu items: Powertrain / Engine and ECT / DTC.

    4. Read the DTCs.

      Result
      Display (DTC output) Proceed To
      P0341 and/or P0343 A
      P0341, P0343 and other DTCs B

      Tech Tips

      If any other codes besides P0341 and P0343 are output, perform the troubleshooting for those DTCs first.


    B

    GO TO DTC CHART

    A

  2. CHECK IF ENGINE STARTS

    Result
    Display (DTC output) Proceed To
    Engine starts. A
    Engine does not start. B

    B

    INSPECT ECM Click here

    A

  3. READ VALUE OF INTELLIGENT TESTER (SYNCHRONIZATION CAMSHAFT - CRANKSHAFT)


    1. Connect the intelligent tester to the DLC3.

    2. Start the engine and turn the intelligent tester on.

    3. Select the following menu items: Powertrain / Engine and ECT / Synchronization Cam-Crank.

    4. Read the value.

      Result
      Display (DTC output) Proceed To
      ON A
      OFF B

    NG

    INSPECT ECM Click here

    OK

    CHECK FOR INTERMITTENT PROBLEMS

  4. INSPECT ECM


    1. A0137OJE02

      Disconnect the B32 camshaft position sensor connector.

    2. Turn the ignition switch to the ON position.

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

      Standard voltage
      Tester Connection Specified Condition
      VG (B32-1) - Body ground 4.5 to 5.5 V

    NG

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

    OK

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


    1. A0136T0E02

      Disconnect the B53 and B54 ECM connectors.

    2. Disconnect the B32 camshaft position sensor connector.

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

      Standard resistance
      Check for open
      Tester Connection Specified Condition
      G+ (B54-9) - G+ (B32-2) Below 1 Ω
      G- (B53-18) - G- (B32-3) Below 1 Ω
      Check for short
      Tester Connection Specified Condition
      G+ (B54-9) or G+ (B32-2) - Body ground 10 kΩ or higher
      G- (B53-18) or G- (B32-3) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR)


    1. Check the installation condition of the camshaft position sensor.

      OK
      The sensor is installed correctly.

    NG

    REPAIR OR REPLACE CAMSHAFT POSITION SENSOR

    OK

  7. CHECK SENSOR AIRGAP (CAMSHAFT POSITION SENSOR)


    1. A0136EFE01

      Measure the camshaft position sensor airgap.

      Standard
      0.5 to 1.5 mm (0.020 to 0.059 in.)

    NG

    REPAIR OR REPLACE CAMSHAFT POSITION SENSOR

    OK

  8. INSPECT CAMSHAFT DRIVE PULLEY


    1. Check the camshaft drive pulley.

      OK
      The camshaft drive pulley does not have any cracks or deformation.

    NG

    REPLACE CAMSHAFT DRIVE PULLEY

    OK

  9. CHECK POWER SOURCE CIRCUIT


    1. Check that the battery voltage, ECM power source voltage, and the ground condition of the ECM are normal.

      OK
      The battery voltage, ECM power source voltage, and the ground condition of the ECM are normal.

      Tech Tips

      Make sure that the battery is not discharged during the inspection.


    NG

    REPAIR POWER SOURCE CIRCUIT

    OK

  10. REPLACE CAMSHAFT POSITION SENSOR


    NEXT

  11. CHECK IF DTC RECURS (P0341 AND/OR P0343)


    1. Connect the intelligent tester to the DLC3.

    2. Clear the DTC Click here.

    3. Turn the ignition switch to the ON position and turn the intelligent tester on.

    4. Select the following menu items: Powertrain / Engine and ECT / DTC.

    5. Read the DTCs displayed on the intelligent tester.

      Result
      Display (DTC output) Proceed To
      No output A
      DTC P0341 and/or P0343 B

    B

    REPLACE ECM

    A

    END

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


    1. A0136DKE02

      Disconnect the B53 ECM connector.

    2. Disconnect the B32 camshaft position sensor connector.

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

      Standard resistance
      Check for open
      Tester Connection Specified Condition
      VG (B53-10) - VG (B32-1) Below 1 Ω
      Check for short
      Tester Connection Specified Condition
      VG (B53-10) or VG (B32-1) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE ECM