Dtc P0340 Camshaft Position Sensor A Circuit (Bank 1 Or Single Sensor)

Engine. Lexus Is250, Is220D. Gse20 Ale20
2Ad-Fhv Engine Control System. Lexus Is250, Is220D. Gse20 Ale20

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT CAMSHAFT POSITION SENSOR

CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - ECM)

CHECK CAMSHAFT POSITION SENSOR (SENSOR INSTALLATION)

CHECK CAMSHAFT TIMING SPROCKET

DTC 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 (timing sprocket) has one tooth on its outer circumference and is installed on the camshaft timing chain gear. When the timing gear rotates, the protrusion on the signal plate and the air gap on the pickup coil change, causing fluctuations in the magnetic field that generate a voltage in the pickup coil.
The NE signal plate has 34 teeth and is mounted on the crank angle 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
  1. No camshaft position sensor signal to ECM while cranking
    (2 trip detection logic)
  2. No camshaft position sensor signal to ECM at engine speed of 650 rpm or more
    (1 trip detection logic)
  1. Open or short in camshaft position sensor circuit
  2. Camshaft position sensor
  3. Timing sprocket
  4. ECM

WIRING DIAGRAM


Lexus Is250, Is220D. Gse20 Ale20.2Ad-Fhv Engine Control System.Ecd System. Dtc P0340 Camshaft Position Sensor A Circuit (Bank 1 Or Single Sensor)


INSPECTION PROCEDURE

NOTICE:
After replacing the ECM, the new ECM needs registration (Click here) and initialization (Click here).
1.INSPECT CAMSHAFT POSITION SENSOR


    Lexus Is250, Is220D. Gse20 Ale20.2Ad-Fhv Engine Control System.Ecd System. Dtc P0340 Camshaft Position Sensor A Circuit (Bank 1 Or Single Sensor)

  1. Disconnect the E80 sensor connector.

  1. Measure the resistance of the 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
    HINT:
    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)


    Lexus Is250, Is220D. Gse20 Ale20.2Ad-Fhv Engine Control System.Ecd System. Dtc P0340 Camshaft Position Sensor A Circuit (Bank 1 Or Single Sensor)

  1. Disconnect the E80 sensor connector.

  1. Disconnect the E59 ECM connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    E80-1 - G+ (E59-80)
    		Below 1 Ω
    E80-2 - G- (E59-79)
    		Below 1 Ω
    E80-1 or G+ (E59-80) - Body ground
    		10 kΩ or higher
    E80-2 or G- (E59-79) - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK CAMSHAFT POSITION SENSOR (SENSOR INSTALLATION)


    Lexus Is250, Is220D. Gse20 Ale20.2Ad-Fhv Engine Control System.Ecd System. Dtc P0340 Camshaft Position Sensor A Circuit (Bank 1 Or Single Sensor)

  1. Check the sensor installation.

    OK:
    Sensor is installed correctly.


NG
REPAIR OR REPLACE CAMSHAFT POSITION SENSOR
OK


4.CHECK CAMSHAFT TIMING SPROCKET

  1. Check the condition of the timing sprocket.

    OK:
    Timing sprocket does not have any cracks or deformation.


NG
REPLACE CAMSHAFT TIMING SPROCKET
OK

REPLACE ECM