ECD SYSTEM (w/ EGR Cooler), 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) 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

Reference: Inspection using the oscilloscope.

A01E27AE04

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

Tech Tips

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

Item Content
Terminal (b) G+ - G-
Tester Range 5 V/DIV., 20 msec./DIV.
Condition Cranking or idling

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 the intelligent tester. 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. INSPECT CAMSHAFT POSITION SENSOR


    1. A01DZS5E26

      Disconnect the C1 camshaft position sensor connector.

    2. Measure the resistance of the camshaft position sensor.

      Standard resistance
      Tester Connection Specified Condition
      1 - 2 835 to 1,400 Ω at cold
      1 - 2 1,060 to 1,645 Ω at hot

      Tech Tips

      In the table above, the terms "Cold" and "Hot" refer to the temperature of the coils in the sensors. "Cold" means approximately -10 to 50°C (14 to 122°F). "Hot" means approximately 50 to 100°C (122 to 212°F).


    NG

    REPLACE CAMSHAFT POSITION SENSOR

    OK

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


    1. A01E0ROE12

      Disconnect the C1 camshaft position sensor connector.

    2. Disconnect the E7 ECM connector.

    3. Measure the resistance of the wire harness side connectors.

      Standard resistance (Check for open)
      Tester Connection Specified Condition
      C1-1 - G+ (E7-23) Below 1 Ω
      C1-2 - G- (E7-31) Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Specified Condition
      C1-1 or G+ (E7-23) - Body ground 10 kΩ or higher
      C1-2 or G- (E7-31) - Body ground 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK CAMSHAFT POSITION SENSOR (SENSOR INSTALLATION)


    1. A01DY4HE30

      Check the sensor installation.

      OK
      Sensor is installed correctly.

    NG

    TIGHTEN SENSOR

    OK

  4. CHECK PUMP DRIVE SHAFT PULLEY


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

      OK
      Timing sprocket does not have any cracks or deformation.

    NG

    REPLACE PUMP DRIVE SHAFT PULLEY

    OK

    REPLACE ECM Click here