Dtc P0340 Camshaft Position Sensor Circuit


DESCRIPTION

MONITOR DESCRIPTION

MONITOR STRATEGY

CONFIRMATION DRIVING PATTERN

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK TERMINAL VOLTAGE (SENSOR POWER SOURCE)

CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - ECM)

CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR)

INSPECT CAMSHAFT TIMING GEAR ASSEMBLY (TEETH OF SENSOR PLATE)

REPLACE CAMSHAFT POSITION SENSOR (FOR INTAKE SIDE)

CHECK WHETHER DTC OUTPUT RECURS (DTC P0340, P0342 OR P0343)

CHECK VALVE TIMING (CHECK FOR LOOSE TIMING CHAIN AND JUMPED TEETH)

CHECK WHETHER DTC OUTPUT RECURS (DTC P0340, P0342 OR P0343)

CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR (FOR INTAKE SIDE) - ECM)

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)


DESCRIPTION

The camshaft position sensor (VV1 signal sensor) for the intake camshaft consists of a magnet and MRE (Magneto-Resistive Element).
The camshaft has a timing rotor for the camshaft position sensor. When the camshaft rotates, changes occur in the air gaps between the timing rotor and MRE, which affects the magnet. As a result, the resistance of the MRE material fluctuates. The camshaft position sensor converts the camshaft rotation data to pulse signals, uses the pulse signals to determine the camshaft angle, are sends it to the ECM. Then the ECM uses this data to control fuel injection time and injection timing.

DTC No.
DTC Detection Condition
Trouble Area
P0340
When one of the following conditions is met:
  1. No camshaft position sensor signal to the ECM while cranking (2 trip detection logic).
  2. No camshaft position sensor signal to ECM at engine speed of 600 rpm or higher (1 trip detection logic).
  3. A missing camshaft position sensor signal despite the crankshaft position sensor inputs being normal at an engine speed of 600 rpm or higher (1 trip detection logic).
  1. Open or short in camshaft position sensor (for intake side) circuit
  2. Camshaft position sensor (for intake side)
  3. Intake camshaft
  4. Timing chain jumped tooth
  5. ECM
P0342
The output voltage of the camshaft position sensor is below 0.3 V for 4 seconds (1 trip detection logic).
  1. Open or short in camshaft position sensor (for intake side) circuit
  2. Camshaft position sensor (for intake side)
  3. ECM
P0343
The output voltage is higher than 4.7 V for 4 seconds (1 trip detection logic).
  1. Open or short in camshaft position sensor (for intake side) circuit
  2. Camshaft position sensor (for intake side)
  3. ECM
Reference: Inspection using an oscilloscope.
Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.2Tr-Fe Engine Control.Sfi System. Dtc P0340 Camshaft Position Sensor Circuit
  1. The correct waveform is as shown.
  2. VV1 stands for the camshaft position sensor (for intake side) signal and EV1 stands for the camshaft position sensor (for exhaust side) signal.

Terminal No. (Symbol)
Tool Setting
Condition
C153-23 (VV1+) - C153-22 (VV1-)
5 V/DIV, 20 ms/DIV
Idling
C153-24 (EV1+) - C153-32 (EV1-)
5 V/DIV, 20 ms/DIV
Idling

MONITOR DESCRIPTION

If no signal is transmitted by the camshaft position sensor despite the camshaft revolving, or the rotation of the camshaft and the crankshaft is not synchronized, the ECM interprets this as a malfunction of the sensor.
Also, when the sensor output voltage remains at below 0.3 V, or higher than 4.7 V for 4 seconds or more, the ECM stores a DTC.

MONITOR STRATEGY


Required Sensors/Components (Main)
Camshaft position sensor
Required Sensors/Components (Related)
Crankshaft position sensor
Frequency of Operation
Continuous

CONFIRMATION DRIVING PATTERN

  1. Connect the GTS to the DLC3.
  2. Turn the ignition switch to ON and turn the GTS on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  4. Turn the ignition switch off and wait for at least 30 seconds.
  5. Turn the ignition switch to ON and turn the GTS on.
  6. Start the engine.
  7. Idle the engine for 10 seconds or more [A].
  8. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes [B].
  9. Read the Pending DTCs.
    HINT:
    1. If a pending DTC is output, the system is malfunctioning.
    2. If a pending DTC is not output, perform the following procedure.
  10. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
  11. Input the DTC: P0340, P0342 or P0343.
  12. Check the DTC judgment result.

    GTS Display
    		Description
    NORMAL
    1. DTC judgment completed
    2. System normal
    ABNORMAL
    1. DTC judgment completed
    2. System abnormal
    INCOMPLETE
    1. DTC judgment not completed
    2. Perform driving pattern after confirming DTC enabling conditions
    N/A
    1. Unable to perform DTC judgment
    2. Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
    HINT:
    1. If the judgment result shows NORMAL, the system is normal.
    2. If the judgment result shows ABNORMAL, the system has a malfunction.
    3. If the judgment result shows INCOMPLETE or N/A, perform steps [A] and [B] again.

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.2Tr-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 conditions 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 TERMINAL VOLTAGE (SENSOR POWER SOURCE)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.2Tr-Fe Engine Control.Sfi System. Dtc P0340 Camshaft Position Sensor Circuit

  1. Disconnect the camshaft position sensor (for intake side) connector.

  1. Turn the ignition switch to ON.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    C139-3 (VC) - Body ground
    		Ignition switch ON
    		4.5 to 5.5 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Camshaft Position Sensor (for Intake Side))


NG
Go to step 9
OK


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

  1. Disconnect the camshaft position sensor (for intake side) connector.

  1. Disconnect the ECM connector.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    C139-1 (VVI+) - C153-23 (VV1+)
    		Always
    		Below 1 Ω
    C139-2 (VVI-) - C153-22 (VV1-)
    		Always
    		Below 1 Ω
    C139-1 (VVI+) or C153-23(VV1+) - Body ground
    		Always
    		10 kΩ or higher
    C139-2 (VVI-) or C153-22 (VV1-) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.2Tr-Fe Engine Control.Sfi System. Dtc P0340 Camshaft Position Sensor Circuit

  1. Check the camshaft position sensor (for intake side).

    OK:
    Sensor is installed correctly.


NG
SECURELY REINSTALL SENSOR (LandCruiser RM000000YMY02TX.html)
OK


4.INSPECT CAMSHAFT TIMING GEAR ASSEMBLY (TEETH OF SENSOR PLATE)

  1. Inspect the teeth of the sensor plate.

    OK:
    Sensor plate teeth do not have any cracks or deformation.
    HINT:
    Perform "Inspection After Repair" after replacing the camshaft timing gear assembly (LandCruiser RM000004NJC03XX.html).


NG
REPLACE CAMSHAFT TIMING GEAR ASSEMBLY (LandCruiser RM000000YN002GX.html)
OK


5.REPLACE CAMSHAFT POSITION SENSOR (FOR INTAKE SIDE)

  1. Replace the camshaft position sensor (for intake side) (LandCruiser RM000000YN002GX.html).


NEXT


6.CHECK WHETHER DTC OUTPUT RECURS (DTC P0340, P0342 OR P0343)

  1. Connect the GTS to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the GTS on.

  1. Clear the DTCs.

  1. Turn the ignition switch off and wait for at least 30 seconds.

  1. Start the engine and idle it for 10 seconds or more.

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

  1. Read the DTCs.

    Result
    Result
    		Proceed to
    P0340, P0342 or P0343 is output
    		A
    No DTC is output
    		B
    HINT:
    If the engine does not start, replace the ECM.


B
END
A


7.CHECK VALVE TIMING (CHECK FOR LOOSE TIMING CHAIN AND JUMPED TEETH)

  1. Check for mechanical malfunctions that affect the valve timing, such as a jumped tooth or stretching of the timing chain.



NG
CHECK ENGINE MECHANICAL SYSTEM (LandCruiser RM00000447K00SX.html)
OK


8.CHECK WHETHER DTC OUTPUT RECURS (DTC P0340, P0342 OR P0343)

  1. Connect the GTS to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the GTS on.

  1. Clear the DTCs.

  1. Turn the ignition switch off and wait for at least 30 seconds.

  1. Start the engine and idle it for 10 seconds or more.

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

  1. Read the DTCs.

    Result
    Result
    		Proceed to
    P0340, P0342 or P0343 is output
    		A
    No DTC is output
    		B
    HINT:
    If the engine does not start, replace the ECM.


B
CHECK FOR INTERMITTENT PROBLEMS (LandCruiser RM000000VNL00AX.html)
A

REPLACE ECM (LandCruiser RM000000VW203EX.html)

9.CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR (FOR INTAKE SIDE) - ECM)

  1. Disconnect the camshaft position sensor (for intake side) connector.

  1. Disconnect the ECM connector.

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

    Standard Resistance:

    Tester Connection
    		Condition
    		Specified Condition
    C139-3 (VC) - C153-21 (VCV1)
    		Always
    		Below 1 Ω
    C139-3 (VC) or C153-21 (VCV1) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (LandCruiser RM000000VW203EX.html)