DTC    P0340    Camshaft Position Sensor Circuit Malfunction

DTC    P0342    Camshaft Position Sensor "A" Circuit Low Input (Bank 1 or Single Sensor)

DTC    P0343    Camshaft Position Sensor "A" Circuit High Input (Bank 1 or Single Sensor)

DTC    P0345    Camshaft Position Sensor "A" Circuit (Bank 2)

DTC    P0347    Camshaft Position Sensor "A" Circuit Low Input (Bank 2)

DTC    P0348    Camshaft Position Sensor "A" Circuit High Input (Bank 2)

для подготовки Нажмите здесь


DESCRIPTION

The VVT sensor system consists of a timing rotor (installed on each camshaft) and Magnetic Resistance Element (MRE) type VVT sensor. The timing rotor (camshaft) has 3 protrusions. When it rotates, the magnetic vector (direction of magnetic field) applied to the VVT sensor's MRE varies, which causes its resistance to vary. This varying resistance is converted to voltage, and then modified into a rectangular waveform with Hi (approximately 4 V) and Lo (approximately 1 V) outputs. As a result, the actual camshaft's position is detected and the position is output to the ECM.

DTC No.
DTC Detection Condition
Trouble Area
P0340
P0345
  1. Input voltage to ECM remains 0.3 V or less, or 4.7 V or higher for more than 4 seconds, when 2 more seconds have elapsed after turning engine switch on (IG)
    (1 trip detection logic)
  2. No VVT sensor for intake side (bank 1, 2) signal to ECM at engine speed 600 rpm or more
    (2 trip detection logic)
  3. No VVT sensor for intake side (bank 1, 2) signal to ECM during cranking
    (1 trip detection logic)
  1. Open or short in VVT sensor for intake camshaft circuit
  2. VVT sensor for intake camshaft
  3. Camshaft timing gear for intake camshaft
  4. ECM
P0342
P0347
Output voltage of VVT sensor for intake side (bank 1, 2) 0.3 V or less for 4 seconds
(1 trip detection logic)
  1. Open or short in VVT sensor for intake camshaft circuit
  2. VVT sensor for intake camshaft
  3. Camshaft timing gear for intake camshaft
  4. ECM
P0343
P0348
Output voltage of VVT sensor for intake side (bank 1, 2) 4.7 V or more for 4 seconds
(1 trip detection logic)
  1. Open or short in VVT sensor for intake camshaft circuit
  2. VVT sensor for intake camshaft
  3. Camshaft timing gear for intake camshaft
  4. ECM
A149748E02
  1. Reference: Inspection using an oscilloscope

УКАЗАНИЕ:
  1. The correct waveform is as shown.
  2. VV1+ and VV2+ stand for the VVT sensor signal, and NE+ stands for the CKP sensor signal.

Item
Content
Terminal
NE+ - NE-
VV1+ - VV1-
VV2+ - VV2-
Equipment Setting
5 V/DIV., 20 msec./DIV.
Condition
Cranking or idling

MONITOR DESCRIPTION

If no signal is transmitted by the VVT sensor despite the engine revolving, the ECM interprets this as a malfunction of the sensor.
When the sensor output voltage remains less than 0.3 V, or more than 4.7 V for more than 5 seconds, the ECM sets a DTC.

WIRING DIAGRAM


A150459E01


INSPECTION PROCEDURE

УКАЗАНИЕ:
Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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.CHECK ECM TERMINAL VOLTAGE
A150300E01

  1. Inspect the ECM using an oscilloscope.
    Item
    		Content
    Terminal
    		NE+ - NE-
    VV1+ - VV1-
    VV2+ - VV2-
    Equipment Setting
    		5 V/DIV., 20 msec./DIV.
    Condition
    		Cranking or idling

    1. While the engine is idling, check the waveform between the terminals of the ECM connector.

      Standard voltage:
      Tester Connections
      		Condition
      		Specified Conditions
      E1-27 (NE+) - E1-34 (NE-)
      		Engine idling
      		Correct waveform appears as shown
      E2-25 (VV1+) - E2-33 (VV1-)
      		Engine idling
      E4-19 (VV2+) - E4-29 (VV2-)
      		Engine idling



OK
CHECK FOR INTERMITTENT PROBLEMS (Нажмите здесь)
NG


2.CHECK VVT SENSOR FOR INTAKE CAMSHAFT (SENSOR POWER SOURCE)
A107149E32

  1. Disconnect the E31 or E39 VVT sensor connector.

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

    Standard voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    E39-3 (VC) - Body ground
    		Engine switch on (IG)
    		4.5 to 5.0 V
    E31-3 (VC) - Body ground
    		Engine switch on (IG)
    		4.5 to 5.0 V



NG
Перейдите к шагу 8
OK


3.CHECK HARNESS AND CONNECTOR (VVT SENSOR FOR INTAKE CAMSHAFT - ECM)
A148354E03

  1. Disconnect the E31 or E39 VVT sensor connector.

  1. Disconnect the E2 or E4 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
    E39-1 (VVL+) - E2-25 (VV1+)
    		Always
    		Below 1 Ω
    E39-2 (VVL-) - E2-33 (VV1-)
    		Always
    		Below 1 Ω
    E31-1 (VVR+) - E4-19 (VV2+)
    		Always
    		Below 1 Ω
    E31-2 (VVR-) - E4-29 (VV2-)
    		Always
    		Below 1 Ω

    Standard resistance (Check for short):
    Tester Connection
    		Condition
    		Specified Condition
    E39-1 (VVL+) or E2-25 (VV1+) - Body ground
    		Always
    		10 kΩ or higher
    E39-2 (VVL-) or E2-33 (VV1-) - Body ground
    		Always
    		10 kΩ or higher
    E31-1 (VVR+) or E4-19 (VV2+) - Body ground
    		Always
    		10 kΩ or higher
    E31-2 (VVR-) or E4-29 (VV2-) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK SENSOR INSTALLATION (VVT SENSOR FOR INTAKE CAMSHAFT)
BR03795E17

  1. Check the VVT sensor installation.

    OK:
    Sensor is installed correctly.



NG
SECURELY REINSTALL SENSOR (Нажмите здесь)
OK


5.CHECK CAMSHAFT (TEETH)

  1. Check the teeth of the camshaft.

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



NG
REPLACE CAMSHAFT (Нажмите здесь)
OK


6.REPLACE VVT SENSOR FOR INTAKE SIDE

  1. Replace the VVT sensor for intake side (see page Нажмите здесь).


NEXT


7.CHECK WHETHER DTC OUTPUT RECURS (DTC P0340, P0342. P0343, P0345, P0347 AND/OR P0348)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the tester ON.

  1. Clear DTCs

  1. Start the engine.

  1. Enter the following menus: Powertrain / Engine / DTC / Pending Codes.

  1. Read DTCs.

    Result:

    Display (DTC Output)
    		Proceed to
    No output
    		A
    P0340, P0342. P0343, P0345, P0347 and/or P0348
    		B



B
REPLACE ECM (Нажмите здесь)
A

END 

8.CHECK HARNESS AND CONNECTOR (VVT SENSOR FOR INTAKE SIDE - ECM)
A150456E04

  1. Disconnect the E31 or E39 VVT sensor connector.

  1. Disconnect the E1 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
    E39-3 (VC) - E1-18 (VC)
    		Always
    		Below 1 Ω
    E31-3 (VC2) - E1-18 (VC)
    		Always
    		Below 1 Ω

    Standard resistance (Check for short):
    Tester Connection
    		Condition
    		Specified Condition
    E39-3 (VC) or E1-18 (VC) - Body ground
    		Always
    		10 kΩ or higher
    E31-3 (VC2) or E1-18 (VC) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (Нажмите здесь)