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

for Preparation Click here


DESCRIPTION

The camshaft position sensor consists of a magnet and an iron core which is wrapped with copper wire, and is installed onto the cylinder head. When the camshaft rotates, each of 3 teeth on the camshaft passes through the camshaft position sensor. This activates the internal magnet in the sensor, generating a voltage in the copper wire. The camshaft rotation is synchronized with the crankshaft rotation. When the crankshaft turns twice, the voltage is generated 3 times in the camshaft position sensor. The generated voltage in the sensor acts as a signal, allowing the ECM to locate the camshaft position. This signal is then used to control ignition timing, fuel injection timing, and the VVT system.

DTC No.
DTC Detection Conditions
Trouble Areas
P0340
Case 1
  1. No camshaft position sensor signal to ECM while cranking for 1 second or more (2 -trip detection logic)
Case 2
  1. Camshaft/Crankshaft misalignment detected at engine speed of 600 rpm or more (1-trip detection logic)
  1. Open or short in sensor circuit
  2. Camshaft position sensor
  3. Camshaft
  4. Jumped tooth of timing chain
  5. ECM

HINT:
DTC P0340 indicates a malfunction relating to the camshaft position sensor (+) circuit (the wire harness between the ECM and camshaft position sensor, and the camshaft position sensor itself).

Reference: Inspection using an oscilloscope
A122557E03

HINT:
  1. The correct waveform is as shown in the illustration.
  2. G2+ stands for the camshaft position sensor signal, and NE+ stands for the crankshaft position sensor signal.
  3. Grounding failure of the shielded wire may cause noise in waveforms.
Item
Contents
Terminal
CH1: G2+ - NE-
CH2: NE+ - NE-
Equipment Setting
5 v/DIV, 20 ms./DIV
Condition
Cranking or idling


WIRING DIAGRAM

Refer to DTC P0335 (Click here).

INSPECTION PROCEDURE

HINT:
Read freeze frame data using an intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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.

1.INSPECT CAMSHAFT POSITION SENSOR (RESISTANCE)


    G037727E14

  1. Disconnect the camshaft position sensor connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    1 - 2
    		20°C(68°F)
    		1850 to 2450 Ω

    Text in Illustration 
    *1
    		Component without harness connected:
    (Camshaft Position Sensor)

  1. Reconnect the camshaft position sensor connector.



NG
REPLACE CAMSHAFT POSITION SENSOR (Click here)
OK


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


    A106885E10

  1. Disconnect the camshaft position sensor connector.

  1. Disconnect the ECM connector.

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

    Standard Resistance (Check for Open):
    Tester Connection
    		Condition
    		Specified Condition
    B29-1(G2) - B8-94(G2+)
    		Always
    		Below 1 Ω
    B29-2(G-) - B8-117(NE-)
    		Always
    		Below 1 Ω

    Standard Resistance (Check for Short):
    Tester Connection
    		Condition
    		Specified Condition
    B29-1(G2) or B8-94(G2+) - Body ground
    		Always
    		10 kΩ or higher
    B29-2(G-) or B8-117(NE-) - Body ground
    		Always
    		10 kΩ or higher

    Text in Illustration 
    *1
    		Front view of wire harness connector:
    (to Camshaft Position Sensor)
    *2
    		Front view of wire harness connector:
    (to ECM)

  1. Reconnect the ECM connector.

  1. Reconnect the camshaft position sensor connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR)


    BR03795E25

  1. Check the camshaft position sensor installation condition.

    OK:
    Sensor is installed correctly.



NG
SECURELY REINSTALL SENSOR
OK


4.CHECK VALVE TIMING

  1. Check the valve timing (Click here).



NG
ADJUST VALVE TIMING (Click here)
OK


5.INSPECT CAMSHAFT POSITION SENSOR

  1. Check the teeth of the camshaft.

    OK:
    Camshaft teeth do not have any cracks or deformation.



NG
REPLACE CAMSHAFT (Click here)
OK


6.REPLACE CAMSHAFT POSITION SENSOR

  1. Replace the camshaft position sensor (Click here).


NEXT


7.CHECK WHETHER DTC OUTPUT RECURS (DTC P0340)

  1. Connect an intelligent tester to the DLC3.

  1. Turn the ignition switch to ON and turn the tester on.

  1. Clear DTCs (Click here).

  1. Start the engine.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC.

  1. Read DTCs.
    Result 
    Result
    		Proceed to
    No output
    		A
    P0340
    		B

HINT:
If the engine does not start, replace the ECM.



B
REPLACE ECM (Click here)
A

END