Dtc P0340 Camshaft Position Sensor Circuit


DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK VVT SENSOR (SENSOR POWER SOURCE)

CHECK HARNESS AND CONNECTOR (VVT SENSOR - ECM)

CHECK SENSOR INSTALLATION

CHECK VALVE TIMING

CHECK CAMSHAFT TIMING GEAR ASSEMBLY (TEETH OF PLATE)

REPLACE VVT SENSOR

CHECK WHETHER DTC OUTPUT RECURS

DTC P0340 Camshaft Position Sensor Circuit

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)


DESCRIPTION

The Variable Valve Timing (VVT) sensor (VV1, 2 signal) of the intake camshaft consists of a magnet and MRE (Magnetoresistive 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 revolution. Based on a combination of the VVT 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
One of the following conditions is met:
  1. Missing VVT sensor (for intake camshaft) signal despite crankshaft position sensor inputs normal at engine speed of 600 rpm or higher (1 trip detection logic).
  2. No VVT sensor (for intake camshaft) signal to ECM at engine speed of 600 rpm or higher (1 trip detection logic).
  3. No VVT sensor (for intake camshaft) signal to ECM while cranking (2 trip detection logic).
  1. Open or short in VVT sensor circuit
  2. VVT sensor
  3. Camshaft timing gear assembly
  4. Timing chain has jumped tooth
  5. ECM
P0342
P0347
The output voltage of the VVT sensor is below 0.3 V for 4 seconds (1 trip detection logic).
P0343
P0348
The output voltage of the VVT sensor is higher than 4.7 V for 4 seconds (1 trip detection logic).
P0345
No VVT sensor (for intake camshaft) signal at engine speed of 600 rpm or higher (1 trip detection logic).

  1. Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gr-Fe Engine Control.Sfi System. Dtc P0340 Camshaft Position Sensor Circuit
    Reference: Inspection using an oscilloscope (VV1, VV2 and NE Signal Waveforms).
    HINT:
    1. The correct waveforms are as shown.
    2. VV1+ and VV2+ are the VVT sensor signals, and NE+ is the crankshaft position sensor signal.
    3. Grounding failure of the shielded wire may cause noise in the waveforms.
    Item
    		Content
    Terminal
    		VV1+ - VV1-
    VV2+ - VV2-
    NE+ - NE-
    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 running, or the rotations of the camshaft and crankshaft are not synchronized, the ECM interprets this as a malfunction of the sensor.

WIRING DIAGRAM

  1. for Automatic Transmission

Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gr-Fe Engine Control.Sfi System. Dtc P0340 Camshaft Position Sensor Circuit

  1. for Manual Transmission

Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gr-Fe Engine Control.Sfi System. Dtc P0340 Camshaft Position Sensor Circuit


INSPECTION PROCEDURE

HINT:
Read freeze frame data using the GTS. 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, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
1.CHECK VVT SENSOR (SENSOR POWER SOURCE)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gr-Fe Engine Control.Sfi System. Dtc P0340 Camshaft Position Sensor Circuit

  1. Disconnect the VVT sensor connector.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    C20-3 (VC) - Body ground
    		Engine switch on (IG)
    		4.5 to 5.0 V
    C21-3 (VC) - Body ground
    		Engine switch on (IG)
    		4.5 to 5.0 V
    Text in Illustration
    *A
    		Bank 1
    *B
    		Bank 2
    *a
    		Front view of wire harness connector
    (to VVT Sensor)

  1. Reconnect the VVT sensor connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


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

  1. Disconnect the VVT 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):
    for Automatic Transmission
    Tester Connection
    		Condition
    		Specified Condition
    C20-1 (VVR+) - C34-10 (VV1+)
    		Always
    		Below 1 Ω
    C20-2 (VVR-) - C34-11 (VV1-)
    		Always
    		Below 1 Ω
    C21-1 (VVL+) - C34-4 (VV2+)
    		Always
    		Below 1 Ω
    C21-2 (VVL-) - C34-5 (VV2-)
    		Always
    		Below 1 Ω
    for Manual Transmission
    Tester Connection
    		Condition
    		Specified Condition
    C20-1 (VVR+) - C34-9 (VV1+)
    		Always
    		Below 1 Ω
    C20-2 (VVR-) - C34-10 (VV1-)
    		Always
    		Below 1 Ω
    C21-1 (VVL+) - C34-12 (VV2+)
    		Always
    		Below 1 Ω
    C21-2 (VVL-) - C34-11 (VV2-)
    		Always
    		Below 1 Ω

    Standard Resistance (Check for Short):
    for Automatic Transmission
    Tester Connection
    		Condition
    		Specified Condition
    C20-1 (VVR+) or C34-10 (VV1+) - Body ground
    		Always
    		10 kΩ or higher
    C20-2 (VVR-) or C34-11 (VV1-) - Body ground
    		Always
    		10 kΩ or higher
    C21-1 (VVL+) or C34-4 (VV2+) - Body ground
    		Always
    		10 kΩ or higher
    C21-2 (VVL-) or C34-5 (VV2-) - Body ground
    		Always
    		10 kΩ or higher
    for Manual Transmission
    Tester Connection
    		Condition
    		Specified Condition
    C20-1 (VVR+) or C34-9 (VV1+) - Body ground
    		Always
    		10 kΩ or higher
    C20-2 (VVR-) or C34-10 (VV1-) - Body ground
    		Always
    		10 kΩ or higher
    C21-1 (VVL+) or C34-12 (VV2+) - Body ground
    		Always
    		10 kΩ or higher
    C21-2 (VVL-) or C34-11 (VV2-) - Body ground
    		Always
    		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 SENSOR INSTALLATION


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gr-Fe Engine Control.Sfi System. Dtc P0340 Camshaft Position Sensor Circuit

  1. Check the VVT sensor installation.

    OK:
    Sensor is installed correctly.


NG
SECURELY REINSTALL SENSOR (LandCruiser RM0000028AK01DX.html)
OK


4.CHECK VALVE TIMING


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Gr-Fe Engine Control.Sfi System. Dtc P0340 Camshaft Position Sensor Circuit

  1. Remove the cylinder head cover sub-assembly RH and LH.

  1. Turn the crankshaft to align the matchmarks of the crankshaft.

  1. Align the notch of the crankshaft pulley to the "0" position.

  1. Check if the timing marks of the camshaft pulley and camshaft bearing cap align.

    Text in Illustration
    *a
    		Timing Mark

  1. Turn the crankshaft clockwise 360° if the timing marks do not align. Check if they align once again.

    OK:
    The timing marks of the camshaft pulley and camshaft bearing cap align when the notch of the crankshaft pulley is in the "0" position.

  1. Reinstall the cylinder head cover sub-assembly RH and LH.



NG
CHECK ENGINE MECHANICAL SYSTEM (LandCruiser RM000002BK3041X.html)
OK


5.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.
    HINT:
    for Automatic Transmission
    Perform "Inspection After Repair" after replacing the camshaft timing gear assembly (LandCruiser RM000004NJC03SX.html).


NG
REPLACE CAMSHAFT TIMING GEAR ASSEMBLY (LandCruiser RM000003B6X01KX.html)
OK


6.REPLACE VVT SENSOR

  1. Replace the VVT sensor (LandCruiser RM0000028AM01DX.html).


NEXT


7.CHECK WHETHER DTC OUTPUT RECURS

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the GTS on.

  1. Clear the DTCs (LandCruiser RM000000PDK1DIX.html).

  1. Start the engine.

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

  1. Read the DTCs.

    Result
    Result
    		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 (LandCruiser RM00000329203TX.html)
A

END