Dtc P0340 Camshaft Position Sensor Circuit Malfunction


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK ECM (VV1, VV2, NE WAVEFORM)

CHECK WIRE HARNESS (SENSOR POWER SOURCE)

CHECK WIRE HARNESS (VVT SENSOR - ECM)

CHECK VVT SENSOR (INSTALLATION)

CHECK CAMSHAFT TIMING GEAR ASSEMBLY (TEETH OF PLATE)

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 camshaft position sensor (G) signal consists of a magnet and MRE element.
The camshaft drive gear has 3 teeth on its inner circumference. When the camshaft gear rotates, changes occur in the air gaps between the protrusion on the gear and the pickup coil. The change affects the magnetic field and results in changes in the resistance of the MRE element. The crankshaft angle sensor plate has 34 teeth and outputs 34 signals every engine revolution. The ECM detects the standard crankshaft angle based on the G signal, and actual crankshaft angle and engine speed based on the crankshaft position sensor (NE) signal.

DTC No.
DTC Detection Condition
Trouble Area
P0340
P0345
STA ON:
No camshaft position sensor signal to ECM during cranking for 4 seconds or more
STA OFF:
No camshaft position sensor signal to ECM with engine speed 600 or more
  1. Open or short in VVT sensor circuit
  2. VVT sensor
  3. Camshaft drive gear
  4. Jumped tooth of timing chain
  5. ECM
P0342
P0347
Output voltage of Variable Valve Timing (VVT) sensor 0.3 V or less for 5 seconds
(1 trip detection logic)
  1. Open or short in VVT sensor circuit
  2. VVT sensor
    Camshaft timing pulley
  3. Jumped tooth of timing chain
  4. ECM
P0343
P0348
Output voltage of VVT sensor 4.7 V or more for 5 seconds
(1 trip detection logic)
  1. Open or short in VVT sensor circuit
  2. VVT sensor
    Camshaft timing pulley
  3. Jumped tooth of timing chain
  4. ECM

WIRING DIAGRAM

Refer to DTC P0335 (Toyota Fortuner RM000000TCW01BX.html).

INSPECTION PROCEDURE

HINT:
Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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 ECM (VV1, VV2, NE WAVEFORM)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Gr-Fe Engine Control System.Sfi System. Dtc P0340 Camshaft Position Sensor Circuit Malfunction

  1. Inspect using an oscilloscope.

    1. While the engine is idling, check the waveform of the ECM connector.

      OK:
      Tester Connection
      		Specified Condition
      E17-19 (VV1+) - E17-29 (VV1-)
      E17-18 (VV2+) - E17-28 (VV2-)
      E17-21 (NE+) - E17-20 (NE-)
      		Correct waveform is as shown
      Tool Setting
      		Condition
      5 V/DIV., 20 msec./DIV.
      		Idling


NG
REPLACE VVT SENSOR
OK


2.CHECK WIRE HARNESS (SENSOR POWER SOURCE)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Gr-Fe Engine Control System.Sfi System. Dtc P0340 Camshaft Position Sensor Circuit Malfunction

  1. Disconnect the C20 and C21 VVT sensor connectors.

  1. Turn the ignition switch ON.

  1. Measure the voltage of the wire harness side connectors.

    Standard voltage:
    Tester Connection
    		Specified Condition
    C20-3 (VC) - Body ground
    		4.5 to 5.5 V
    C21-3 (VC) - Body ground
    		4.5 to 5.5 V


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


3.CHECK WIRE HARNESS (VVT SENSOR - ECM)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Gr-Fe Engine Control System.Sfi System. Dtc P0340 Camshaft Position Sensor Circuit Malfunction

  1. Disconnect the C20 and C21 VVT sensor connectors.

  1. Disconnect the E17 ECM connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Bank 1
    Tester Connection
    		Specified Condition
    C21-1 (VVR+) - E17-19 (VV1+)
    		Below 1 Ω
    C21-2 (VVR-) - E17-29 (VV1-)
    		Below 1 Ω
    C21-1 (VVR+) or E17-19 (VV1+) - Body ground
    		10 kΩ or higher
    C21-2 (VVR-) or E17-29 (VV1-) - Body ground
    		10 kΩ or higher
    Bank 2
    Tester Connection
    		Specified Condition
    C20-1 (VVL+) - E17-18 (VV2+)
    		Below 1 Ω
    C20-2 (VVL-) - E17-28 (VV2-)
    		Below 1 Ω
    C20-1 (VVL+) or E17-18 (VV2+) - Body ground
    		10 kΩ or higher
    C20-2 (VVL-) or E17-28 (VV2-) - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


4.CHECK VVT SENSOR (INSTALLATION)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.1Gr-Fe Engine Control System.Sfi System. Dtc P0340 Camshaft Position Sensor Circuit Malfunction

  1. Check the VVT sensor installation.

    OK:
    Sensor is installed correctly.


NG
SECURELY REINSTALL VVT SENSOR
OK


5.CHECK CAMSHAFT TIMING GEAR ASSEMBLY (TEETH OF PLATE)

  1. Check the teeth of the signal plate.

    OK:
    Signal plate does not have cracks or deformation.


NG
REPLACE CAMSHAFT TIMING GEAR ASSEMBLY
OK

REPLACE VVT SENSOR