Dtc P0340 Camshaft Position Sensor Circuit Malfunction

Engine Hybrid System. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
2Tr-Fe Engine Control. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

MONITOR DESCRIPTION

MONITOR STRATEGY

CONFIRMATION DRIVING PATTERN

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT CAMSHAFT POSITION SENSOR (RESISTANCE)

CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - ECM)

CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR)

INSPECT CAMSHAFT TIMING GEAR ASSEMBLY (TEETH)

REPLACE CAMSHAFT POSITION SENSOR

CHECK WHETHER DTC OUTPUT RECURS

DTC P0340 Camshaft Position Sensor Circuit Malfunction


DESCRIPTION

The camshaft position sensor consists of a magnet and an iron core which is wrapped with copper wire, and is installed on the cylinder head. When the camshaft rotates, each of the 3 teeth on the camshaft pass through the camshaft position sensor. This activates the internal magnet in the sensor, generating a voltage in the copper wire. The camshaft rotation is synchronized with the crankshaft rotation. When the crankshaft turns twice, the voltage is generated 3 times in the camshaft position sensor. The generated voltage in the sensor acts as a signal, allowing the ECM to locate the camshaft position. This signal is then used to control ignition timing, fuel injection timing, and the VVT system.

DTC No.
DTC Detection Condition
Trouble Area
P0340
When one of the following conditions is met:
  1. No camshaft position sensor signal is sent to the ECM while cranking (2 trip detection logic).
  2. The camshaft position sensor signal is missing despite the crankshaft position sensor input being normal at an engine speed of 600 rpm or more (1 trip detection logic).
  1. Open or short in camshaft position sensor circuit
  2. Camshaft position sensor
  3. Camshaft timing gear assembly
  4. Timing chain for intake camshaft jumped tooth
  5. ECM
HINT:
DTC P0340 indicates a malfunction related to the camshaft position sensor (+) circuit (the wire harness between the ECM and camshaft position sensor, and the camshaft position sensor itself).

  1. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Tr-Fe Engine Control.Sfi System (W/ Secondary Air Injection System). Dtc P0340 Camshaft Position Sensor Circuit Malfunction
    Reference: Inspection using an oscilloscope.
    HINT:
    1. G2 stands for the camshaft position sensor signal and NE stands for the crankshaft position sensor signal.
    2. Grounding failure of the shielded wire may cause noise in the waveforms.

    Tester Connection
    		Tool Setting
    		Condition
    		Specified Condition
    C75-27 (NE+) - C75-34 (NE-)
    		5 V/DIV, 20 msec./DIV.
    		Idling
    		The correct waveform is as shown
    C75-26 (G2) - C75-34 (NE-)
    		5 V/DIV, 20 msec./DIV.
    		Idling
    		The correct waveform is as shown

MONITOR DESCRIPTION

If no signal is transmitted by the camshaft position 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 circuit.

MONITOR STRATEGY


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

CONFIRMATION DRIVING PATTERN

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

WIRING DIAGRAM


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Tr-Fe Engine Control.Sfi System (W/ Secondary Air Injection System). Dtc P0340 Camshaft Position Sensor Circuit Malfunction


INSPECTION PROCEDURE

HINT:
Read freeze frame data using the intelligent tester. 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.INSPECT CAMSHAFT POSITION SENSOR (RESISTANCE)

  1. Inspect the camshaft position sensor (HILUX_TGN26 RM000000VX501JX_01_0001.html).



NG
REPLACE CAMSHAFT POSITION SENSOR (HILUX_TGN26 RM000000VX701JX.html)
OK


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

  1. Disconnect the camshaft position 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
    C68-1 - C75-26 (G2)
    		Always
    		Below 1 Ω
    C68-2 - C75-34 (NE-)
    		Always
    		Below 1 Ω
    C68-1 or C75-26 (G2) - Body ground
    		Always
    		10 kΩ or higher
    C68-2 or C75-34 (NE-) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR)


    Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.2Tr-Fe Engine Control.Sfi System (W/ Secondary Air Injection System). Dtc P0340 Camshaft Position Sensor Circuit Malfunction

  1. Check the camshaft position sensor.

    OK:
    Sensor is installed correctly.


NG
SECURELY REINSTALL SENSOR (HILUX_TGN26 RM000000VX401NX.html)
OK


4.INSPECT CAMSHAFT TIMING GEAR ASSEMBLY (TEETH)

  1. Check the teeth of the camshaft timing gear assembly.

    OK:
    Teeth do not have any cracks or deformation.


NG
REPLACE CAMSHAFT TIMING GEAR ASSEMBLY (HILUX_TGN26 RM000000YN001BX.html)
OK


5.REPLACE CAMSHAFT POSITION SENSOR

  1. Replace the camshaft position sensor (HILUX_TGN26 RM000000VX701JX.html).


NEXT


6.CHECK WHETHER DTC OUTPUT RECURS

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the intelligent tester on.

  1. Clear the DTCs.

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

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

  1. Read the DTCs.

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


B
REPLACE ECM (HILUX_TGN26 RM000000VW2023X.html)
A

END