ECD SYSTEM (w/o DPF), Diagnostic DTC:P0340

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

DESCRIPTION

The camshaft position sensor (G signal sensor) consists of a magnet, iron core and pickup coil.

The G signal plate has 5 teeth on its outer circumference and is installed on the pump drive shaft pulley. When the pump drive shaft pulley rotate, the protrusion on the signal plate and the air gap on the pickup coil change, causing fluctuations in the magnetic field and generating an electromotive force in the pickup coil.

The NE signal plate has 34 teeth and is mounted on the No. 1 crankshaft position sensor plate. The NE signal sensor generates 34 signals for every engine revolution. The ECM detects the standard crankshaft angle based on the G signal and the actual crankshaft angle and the engine speed by the NE signal.

DTC No. DTC Detection Condition Trouble Area
P0340

  • No camshaft position sensor signal to ECM while cranking

    (2 trip detection logic)

  • No camshaft position sensor signal to ECM at engine speed of 650 rpm or more

    (1 trip detection logic)

  • Open or short in camshaft position sensor circuit

  • Camshaft position sensor

  • Pump drive shaft pulley

  • ECM
A01BG6QE07

Reference: Inspection using an oscilloscope.

While idling, the correct waveform is shown in the diagram.

ECM Terminal Name

(a) Between NE+ and NE-

(b) Between G+ and G-
Tester Range 5 V/DIV, 20 msec./DIV
Condition Idling with warm engine

Tech Tips


  • G stands for the camshaft position sensor signal, and NE stands for the crankshaft position sensor signal.

  • The waveform varies depending on the engine speed.

WIRING DIAGRAM

Refer to DTC P0335 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 an intelligent tester. Freeze frame data record 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, if the air-fuel ratio was lean or rich, and other data, from the time the malfunction occurred.

PROCEDURE


  1. INSPECT CAMSHAFT POSITION SENSOR


    1. A01BEWFE01

      Disconnect the D10 camshaft position sensor connector.

    2. Measure the camshaft position sensor resistance.

      Standard resistance
      Tester Connection Specified Condition
      1 - 2

      1,850 to 2,450 Ω

      at 20°C (68°F)

    3. Reconnect the camshaft position sensor connector.


    NG

    REPLACE CAMSHAFT POSITION SENSOR

    OK

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


    1. A01BHNXE11

      Disconnect the D10 camshaft position sensor connector.

    2. Disconnect the D3 ECM connector.

    3. Check the resistance.

      Standard resistance (Check for open)
      Tester Connection Specified Condition
      D10-1 - G+ (D3-23) Below 1 Ω
      D10-2 - G- (D3-31) Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Specified Condition
      D10-1 or G+ (D3-23) - Body ground 10 kΩ or higher
      D10-2 or G- (D3-31) - Body ground 10 kΩ or higher

    4. Reconnect the ECM connector.

    5. Reconnect the camshaft position sensor connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK CAMSHAFT POSITION SENSOR (SENSOR INSTALLATION)


    1. A01BD14E30

      Check the sensor installation.

      OK
      Sensor is installed correctly.

    NG

    SECURELY REINSTALL SENSOR

    OK

  4. CHECK PUMP DRIVE SHAFT PULLEY


    1. Check the condition of the pump drive shaft pulley.

      OK
      Pump drive shaft pulley (sensor rotor portion) does not have any cracks or deformation.

    NG

    REPLACE PUMP DRIVE SHAFT PULLEY

    OK

    REPLACE ECM