SFI SYSTEM, Diagnostic DTC:P0340, P0342, P0343, P0345, P0347, P0348

DTC Code	DTC Name
P0340	Camshaft Position Sensor Circuit Malfunction
P0342	Camshaft Position Sensor "A" Circuit Low Input (Bank 1 or Single Sensor)
P0343	Camshaft Position Sensor "A" Circuit High Input (Bank 1 or Single Sensor)
P0345	Camshaft Position Sensor "A" Circuit (Bank 2)
P0347	Camshaft Position Sensor "A" Circuit Low Input (Bank 2)
P0348	Camshaft Position Sensor "A" Circuit High Input (Bank 2)

DESCRIPTION

The intake camshaft Variable Valve Timing (VVT) sensor (VV1, 2 signal) consists of a magnet and MRE (Magnetic Resistance Element).

The intake camshaft has 3 teeth on its outer circumference. When the intake camshaft rotates, changes occur in the air gaps between the teeth and MRE, which affects the magnetic field. As a result, the resistance of the MRE material fluctuates. The VVT sensor converts the intake camshaft rotation data into pulse signals, uses the pulse signals to determine the camshaft angle, and sends it to the ECM.

The crankshaft position sensor plate has 34 teeth. The crankshaft position sensor 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: The input voltage to the ECM remains at below 0.3 V or higher than 4.7 V for 4 seconds when 2 or more seconds have elapsed after turning the engine switch on (IG) (1 trip detection logic). No VVT sensor (for intake side of Bank 1, 2) signal is sent to the ECM during cranking (1 trip detection logic).	Open or short in VVT sensor (for intake side) circuit VVT sensor (for intake side) Intake camshaft (for Bank 1, 2) Jumped tooth of timing chain ECM
P0342 P0347	The output voltage of the VVT sensor (for intake side of Bank 1, 2) is below 0.3 V for 4 seconds (1 trip detection logic).	Open or short in VVT sensor (for intake side) circuit VVT sensor (for intake side) Intake camshaft (for Bank 1, 2) Jumped tooth of timing chain ECM
P0343 P0348	The output voltage of the VVT sensor (for intake side of Bank 1, 2) is higher than 4.7 V for 4 seconds (1 trip detection logic).	Open or short in VVT sensor (for intake side) circuit VVT sensor (for intake side) Intake camshaft (for Bank 1, 2) Jumped tooth of timing chain ECM

DTC Code

DTC Detection Condition

Trouble Area

P0340

P0345

When either condition below is met:

The input voltage to the ECM remains at below 0.3 V or higher than 4.7 V for 4 seconds when 2 or more seconds have elapsed after turning the engine switch on (IG) (1 trip detection logic).
No VVT sensor (for intake side of Bank 1, 2) signal is sent to the ECM during cranking (1 trip detection logic).

Open or short in VVT sensor (for intake side) circuit
VVT sensor (for intake side)
Intake camshaft (for Bank 1, 2)
Jumped tooth of timing chain
ECM

P0342

P0347

The output voltage of the VVT sensor (for intake side of Bank 1, 2) is below 0.3 V for 4 seconds (1 trip detection logic).

Open or short in VVT sensor (for intake side) circuit
VVT sensor (for intake side)
Intake camshaft (for Bank 1, 2)
Jumped tooth of timing chain
ECM

P0343

P0348

The output voltage of the VVT sensor (for intake side of Bank 1, 2) is higher than 4.7 V for 4 seconds (1 trip detection logic).

Open or short in VVT sensor (for intake side) circuit
VVT sensor (for intake side)
Intake camshaft (for Bank 1, 2)
Jumped tooth of timing chain
ECM

Reference: Inspection using an oscilloscope

Standard

for LHD
Tester Connection	Tool Setting	Condition	Specified Condition
C53-110 (NE+) - C53-111 (NE-)	5 V/DIV. 20 msec./DIV.	Cranking or idling	The correct waveform is as shown
C53-92 (VV1+) - C53-91 (VV1-)	5 V/DIV. 20 msec./DIV.	Cranking or idling	The correct waveform is as shown
C53-87 (VV2+) - C53-88 (VV2-)	5 V/DIV. 20 msec./DIV.	Cranking or idling	The correct waveform is as shown

for RHD
Tester Connection	Tool Setting	Condition	Specified Condition
C54-110 (NE+) - C54-111 (NE-)	5 V/DIV. 20 msec./DIV.	Cranking or idling	The correct waveform is as shown
C54-92 (VV1+) - C54-91 (VV1-)	5 V/DIV. 20 msec./DIV.	Cranking or idling	The correct waveform is as shown
C54-87 (VV2+) - C54-88 (VV2-)	5 V/DIV. 20 msec./DIV.	Cranking or idling	The correct waveform is as shown

Tech Tips

VV1+ and VV2+ stand for the VVT sensor (for intake side) signal, and NE+ stands for the CKP sensor signal.

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.

WIRING DIAGRAM

INSPECTION PROCEDURE

Tech Tips

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.

PROCEDURE

CHECK HARNESS AND CONNECTOR (SENSOR POWER SOURCE)

Disconnect the C20 or C21 VVT sensor connector.

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

Standard Voltage

Tester Connection	Condition	Specified Condition
C20-3 (VC) - Body ground	Engine switch on (IG)	4.5 to 5.0 V
C21-3 (VC) - Body ground	Engine switch on (IG)	4.5 to 5.0 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

Disconnect the C20 or C21 VVT sensor connector.
Disconnect the C53 or C54 ECM connector.

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

Standard Resistance

for RHD
Tester Connection	Condition	Specified Condition
C20-1 (VVL+) - C54-92 (VV1+)	Always	Below 1 Ω
C20-2 (VVL-) - C54-91 (VV1-)	Always	Below 1 Ω
C21-1 (VVR+) - C54-87 (VV2+)	Always	Below 1 Ω
C21-2 (VVR-) - C54-88 (VV2-)	Always	Below 1 Ω
C20-1 (VVL+) or C54-92 (VV1+) - Body ground	Always	10 kΩ or higher
C20-2 (VVL-) or C54-91 (VV1-) - Body ground	Always	10 kΩ or higher
C21-1 (VVR+) or C54-87 (VV2+) - Body ground	Always	10 kΩ or higher
C21-2 (VVR-) or C54-88 (VV2-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK SENSOR INSTALLATION
1. Check the VVT sensor (for intake side) installation.
  
  OK
  
  Sensor is installed correctly.
NG
SECURELY REINSTALL SENSOR Click here

OK
CHECK INTAKE CAMSHAFT (TEETH)
1. Check the teeth of the camshaft.
  
  OK
  
  Teeth do not have any cracks or deformation.
NG
REPLACE INTAKE CAMSHAFT Click here

OK
REPLACE VVT SENSOR (for Intake Side)
1. Replace the VVT sensor (for Intake Side) Click here.
NEXT

OK
Sensor is installed correctly.

OK
Teeth do not have any cracks or deformation.

CHECK WHETHER DTC OUTPUT RECURS

Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the tester on.
Clear DTCs.
Start the engine.
Enter the following menus: Powertrain / Engine and ECT / DTC.

Read DTCs.

Result
Result	Proceed to
No output	A
P0340, P0342, P0343, P0345, P0347 or P0348	B

Tech Tips

If the engine does not start, replace the ECM.

REPLACE ECM Click here

END