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)

for Preparation Click here


DESCRIPTION

The intake camshaft's Variable Valve Timing (VVT) sensor (G signal) consists of a magnet and MRE (Magnet Resistance Element).
The VVT camshaft drive gear has a sensor plate with 3 teeth on its outer circumference. When the gear rotates, changes occur in the air gaps between the sensor plate and MRE, which affects the magnetic field. As a result, the resistance of the MRE material fluctuates. The VVT sensor converts the gear rotation data to pulse signals, uses the pulse signals to determine the camshaft angle, and sends it to the ECM.
The crankshaft angle sensor plate has 34 teeth. The pickup coil generates 34 signals for each engine revolution. Based on combination of the G signal and NE signal, the ECM detects the crankshaft angle. Then the ECM uses this data to control fuel injection time and injection timing. Also, based on the NE signal, the ECM detects the engine speed.

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 or more seconds have elapsed after turning ignition switch to the ON position
    (1 trip detection logic)
  2. No VVT sensor signal to ECM during engine speed 600 rpm or more (1trip detection logic)
  3. No VVT sensor signal to ECM during cranking
    (2 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. Jumped tooth of timing chain for intake camshaft
  5. ECM
P0342
P0347
Output voltage of VVT sensor 0.3 V or less is for 5 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. Jumped tooth of timing chain for intake camshaft
  5. ECM
P0343
P0348
Output voltage of VVT sensor 4.7 V or more is for 5 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. Jumped tooth of timing chain for intake camshaft
  5. ECM

  1. A107148E09
    Reference: Inspection using an oscilloscope

    HINT:
    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
    Terminals
    NE+ - NE-
    VV1+ - VV1-
    VV2+ - VV2-
    Equipment Settings
    5 V/DIV.
    20 ms./DIV.
    Conditions
    Cranking or idling

WIRING DIAGRAM

Refer to DTC P0335 (Click here).

INSPECTION PROCEDURE

HINT:
Read freeze frame data using the 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 be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction (Click here).
1.CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE)


    A107149E16
  1. Disconnect the C41 or C45 VVT sensor connector.

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

    Standard voltage:
    Tester Connection
    Specified Condition
    VC (C41-3) - Body ground
    4.5 to 5.0 V
    VC (C45-3) - Body ground
    4.5 to 5.0 V
  1. Reconnect the VVT sensor connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


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


    A135027E03
  1. Disconnect the C41 or C45 VVT sensor connector.

  1. Disconnect the C58 (RHD) or C55 (LHD) ECM connector.

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

    Standard resistance (Check for open):
    RHD:
    Tester Connection
    Specified Condition
    VVR+ (C41-1) - VV1+ (C58-69)
    Below 1 Ω
    VVR- (C41-2) - VV1- (C58-92)
    Below 1 Ω
    VVL+ (C45-1) - VV2+ (C58-67)
    Below 1 Ω
    VVL- (C45-2) - VV2- (C58-90)
    Below 1 Ω
    LHD:
    Tester Connection
    Specified Condition
    VVR+ (C41-1) - VV1+ (C55-69)
    Below 1 Ω
    VVR- (C41-2) - VV1- (C55-92)
    Below 1 Ω
    VVL+ (C45-1) - VV2+ (C55-67)
    Below 1 Ω
    VVL- (C45-2) - VV2- (C55-90)
    Below 1 Ω

    Standard resistance (Check for short):
    RHD:
    Tester Connection
    Specified Condition
    VVR+ (C41-1) or VV1+ (C58-69) - Body ground
    10 kΩ or higher
    VVR- (C41-2) or VV1- (C58-92) - Body ground
    10 kΩ or higher
    VVL+ (C45-1) or VV2+ (C58-67) - Body ground
    10 kΩ or higher
    VVL- (C45-2) or VV2- (C58-90) - Body ground
    10 kΩ or higher
    LHD:
    Tester Connection
    Specified Condition
    VVR+ (C41-1) or VV1+ (C55-69) - Body ground
    10 kΩ or higher
    VVR- (C41-2) or VV1- (C55-92) - Body ground
    10 kΩ or higher
    VVL+ (C45-1) or VV2+ (C55-67) - Body ground
    10 kΩ or higher
    VVL- (C45-2) or VV2- (C55-90) - Body ground
    10 kΩ or higher
  1. Reconnect the VVT sensor connector.

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK VVT SENSOR INSTALLATION (SENSOR INSTALLATION)


    BR03795E17
  1. Check the CKP sensor installation condition.

    OK:
    Sensor is installed correctly.


NG
REPAIR OR REPLACE VVT SENSOR
OK


4.CHECK CAMSHAFT TIMING GEAR ASSEMBLY (TEETH OF PLATE)
  1. Check the teeth of the signal plate.

OK:
Sensor plate teeth do not have any cracks or deformation.


NG
REPLACE CAMSHAFT TIMING GEAR ASSEMBLY
OK


5.REPLACE VVT SENSOR
  1. Replace the VVT sensor (Click here).


NEXT


6.CHECK WHETHER DTC OUTPUT RECURS
  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to the ON position.

  1. Turn the intelligent tester on.

  1. Clear the DTCs (Click here).

  1. Select the following menu items: Powertrain / Engine / DTC.

  1. Read the DTCs.

    Result:

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

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


B
REPLACE ECM (Click here)
A

END