Dtc P0340 Camshaft Position Sensor Circuit Malfunction

Engine Hybrid System. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
1Gr-Fe Engine Control. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

MONITOR DESCRIPTION

CONFIRMATION DRIVING PATTERN

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

CHECK HARNESS AND CONNECTOR (VVT SENSOR - ECM)

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)


DESCRIPTION

The Variable Valve Timing (VVT) sensor (VV1, 2 signal) of the intake camshaft consists of a magnet and MRE (Magnetic 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 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 Code
DTC Detection Condition
Trouble Area
P0340
P0345
When either condition below is met:
  1. No VVT sensor signal despite the crankshaft position sensor input being normal at an engine speed of 600 rpm or more (1 trip detection logic).
  2. No VVT sensor signal is sent to the ECM during cranking for 4 seconds or more (2 trip detection logic).
  1. Open or short in VVT sensor circuit
  2. VVT sensor
  3. Camshaft timing gear assembly
  4. Jumped tooth of timing chain
  5. ECM
P0342
P0347
The output voltage of the VVT sensor is below 0.3 V for 5 seconds (1 trip detection logic).
P0343
P0348
The output voltage of the VVT sensor is higher than 4.7 V for 5 seconds (1 trip detection logic).

  1. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Gr-Fe Engine Control.Sfi System. Dtc P0340 Camshaft Position Sensor Circuit Malfunction
    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 crankshaft position 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 running, or the rotations of the camshaft and the crankshaft are not synchronized, the ECM interprets this as a malfunction of the sensor.

CONFIRMATION DRIVING PATTERN

  1. Connect the intelligent tester to the DLC3.
  2. Turn the ignition switch to ON and turn the tester 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 tester on.
  6. Start the engine.
  7. Idle the engine for 10 seconds or more.
  8. Enter the following menus: Powertrain / Engine and ECT / DTC.
  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, P0343, P0345, P0347 or P0348.
  12. Check the DTC judgment result.

    Tester 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 the Confirmation Driving Pattern and the DTC judgment result again.

WIRING DIAGRAM


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Gr-Fe Engine Control.Sfi System. Dtc P0340 Camshaft Position Sensor Circuit Malfunction


INSPECTION PROCEDURE

HINT:
  1. If no problem is found by this diagnostic troubleshooting procedure, troubleshoot the engine mechanical system.
  2. Read freeze frame data using the intelligent tester. 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.
  3. Bank 1 refers to the bank that includes No. 1 cylinder*.
    *: The No. 1 cylinder is the cylinder which is farthest from the transmission.
  4. Bank 2 refers to the bank that does not include No. 1 cylinder.
1.CHECK VVT SENSOR (SENSOR POWER SOURCE)


    Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Gr-Fe Engine Control.Sfi System. Dtc P0340 Camshaft Position Sensor Circuit Malfunction

  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
    C138-3 (VC) - Body ground
    		Always
    		4.5 to 5.5 V
    C146-3 (VC) - Body ground
    		Always
    		4.5 to 5.5 V
    Text in Illustration
    *A
    		for Bank 1
    *B
    		for Bank 2
    *a
    		Front view of wire harness connector
    (to VVT Sensor)


NG
Go to step 8
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:

    Tester Connection
    		Condition
    		Specified Condition
    C138-1 (VVR+) - C131-19 (VV1+)
    		Always
    		Below 1 Ω
    C138-2 (VVR-) - C131-29 (VV1-)
    		Always
    		Below 1 Ω
    C146-1 (VVL+) - C131-18 (VV2+)
    		Always
    		Below 1 Ω
    C146-2 (VVL-) - C131-28 (VV2-)
    		Always
    		Below 1 Ω
    C138-1 (VVR+) or C131-19 (VV1+) - Body ground
    		Always
    		10 kΩ or higher
    C138-2 (VVR-) or C131-29 (VV1-) - Body ground
    		Always
    		10 kΩ or higher
    C146-1 (VVL+) or C131-18 (VV2+) - Body ground
    		Always
    		10 kΩ or higher
    C146-2 (VVL-) or C131-28 (VV2-) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK SENSOR INSTALLATION


    Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Gr-Fe Engine Control.Sfi System. Dtc P0340 Camshaft Position Sensor Circuit Malfunction

  1. Check the VVT sensor installation.

    OK:
    Sensor is installed correctly.


NG
SECURELY REINSTALL SENSOR (HILUX_TGN26 RM000000XGX052X.html)
OK


4.CHECK VALVE TIMING


    Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Gr-Fe Engine Control.Sfi System. Dtc P0340 Camshaft Position Sensor Circuit Malfunction

  1. Remove the cylinder head cover sub-assembly RH and LH (HILUX_TGN26 RM0000015D100CX.html).

  1. Turn the crankshaft pulley, and align its groove with the timing mark "0" of the timing chain cover.

  1. Check that the timing marks of the camshaft timing gears are aligned with the timing marks of the bearing cap as shown in the illustration.
    If not, turn the crankshaft 1 revolution (360°), and then align the marks as described above.

    OK:
    Timing marks on camshaft timing gears are aligned as shown in the illustration.
    Text in Illustration
    *A
    		for Bank 1
    *B
    		for Bank 2
    *a
    		Timing Mark


NG
ADJUST VALVE TIMING (HILUX_TGN26 RM0000015D100CX.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.


NG
REPLACE CAMSHAFT TIMING GEAR ASSEMBLY (HILUX_TGN26 RM0000015D100CX.html)
OK


6.REPLACE VVT SENSOR

  1. Replace the VVT sensor (HILUX_TGN26 RM000000XGZ04ZX.html).


NEXT


7.CHECK WHETHER DTC OUTPUT RECURS

  1. Connect the intelligent tester to the DLC3.

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

  1. Clear the DTCs (HILUX_TGN26 RM000000PDK0X5X.html).

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

  1. Start the engine.

  1. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.

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

  1. Read the DTCs.

    Result
    Result
    		Proceed to
    DTC is not output
    		A
    P0340, P0342, P0343, P0345, P0347 or P0348 is output
    		B
    HINT:
    If the engine does not start, replace the ECM.


B
REPLACE ECM (HILUX_TGN26 RM000000VW202KX.html)
A

END

8.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:

    Tester Connection
    		Condition
    		Specified Condition
    C138-3 (VC) - C129-23 (VC)
    		Always
    		Below 1 Ω
    C146-3 (VC) - C129-23 (VC)
    		Always
    		Below 1 Ω
    C138-3 (VC) or C129-23 (VC) - Body ground
    		Always
    		10 kΩ or higher
    C146-3 (VC) or C129-23 (VC) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (HILUX_TGN26 RM000000VW202KX.html)