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)

for Preparation Click here


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 (Click here).

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 TERMINAL VOLTAGE
A112403E01

  1. Inspect using an oscilloscope.

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

      OK:
      Correct waveform is as shown

      Tester Connection
      		E17-19 (VV1+) - E17-29 (VV1-)
      E17-18 (VV2+) - E17-28 (VV2-)
      E17-21 (NE+) - E17-20 (NE-)
      Tool Setting
      		5 V/DIV., 20 msec./DIV.
      Condition
      		Idling



NG
REPLACE VVT SENSOR
OK


2.CHECK WIRE HARNESS (SENSOR POWER SOURCE)
A112404E01

  1. Disconnect the C17 or C18 VVT sensor connector.

  1. Turn the ignition switch ON.

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

    Standard voltage:
    Tester Connection
    		Specified Condition
    C18-3 (VC) - Body ground
    		4.5 to 5.5 V
    C17-3 (VC) - Body ground
    		4.5 to 5.5 V



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


3.CHECK WIRE HARNESS (VVT SENSOR - ECM)
A112405E01

  1. Disconnect the C17 and C18 VVT sensor connectors.

  1. Disconnect the E17 ECM connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    C18-1 (VVR+) - E17-19 (VV1+)
    		Below 1 Ω
    C17-1 (VVL+) - E17-18 (VV2+)
    		Below 1 Ω
    C18-2 (VVR-) - E17-29 (VV1-)
    		Below 1 Ω
    C17-2 (VVL-) - E17-28 (VV2-)
    		Below 1 Ω
    C18-1 (VVR+) or E17-19 (VV1+) - Body ground
    		10 kΩ or higher
    C17-1 (VVL+) or E17-18 (VV2+) - Body ground
    		10 kΩ or higher
    C18-2 (VVR-) or E17-29 (VV1-) - Body ground
    		10 kΩ or higher
    C17-2 (VVL-) or E17-28 (VV2-) - Body ground
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


4.CHECK SENSOR INSTALLATION (VVT SENSOR)
BR03795E30

  1. Check the VVT sensor installation.

    OK:
    Sensor is installed correctly.



NG
TIGHTEN 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 cranks or deformation.



NG
REPLACE CAMSHAFT TIMING GEAR ASSEMBLY
OK

REPLACE VVT SENSOR