SFI SYSTEM(w/ Canister Pump Module), Diagnostic DTC:P0340, P0342, P0343, P0345, P0347, P0348

DTC Code	DTC Name
P0340	Camshaft Position Sensor Circuit
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 VVT sensors use a timing rotor (installed on each camshaft) and a Magnetic Resistance Element (MRE) type VVT sensor. The timing rotor (camshaft) has 3 protrusions. When it rotates, the magnetic vector (direction of magnetic field) applied to the VVT sensor magnetic resistance element varies, which causes its resistance to vary. This varying resistance is converted to voltage, and then modified into a rectangular waveform with Hi (approximately 4 V) and Lo (approximately 1 V) outputs. As a result, the actual camshaft position is detected and the position is output to the ECM.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory
P0340	Camshaft Position Sensor Circuit	No VVT sensor signal at engine speed of 600 rpm or higher (1 trip detection logic).	Open or short in VVT sensor (for intake camshaft of bank 1) circuit VVT sensor (for intake camshaft of bank 1) Intake camshaft Valve timing ECM	Comes on	DTC stored
P0342	Camshaft Position Sensor "A" Circuit Low Input (Bank 1 or Single Sensor)	The output voltage of the VVT sensor is less than 0.3 V for 4 seconds (1 trip detection logic).	Open or short in VVT sensor (for intake camshaft of bank 1) circuit VVT sensor (for intake camshaft of bank 1) ECM	Comes on	DTC stored
P0343	Camshaft Position Sensor "A" Circuit High Input (Bank 1 or Single Sensor)	The output voltage of the VVT sensor is higher than 4.7 V for 4 seconds (1 trip detection logic).	Open or short in VVT sensor (for intake camshaft of bank 1) circuit VVT sensor (for intake camshaft of bank 1) ECM	Comes on	DTC stored
P0345	Camshaft Position Sensor "A" Circuit (Bank 2)	No VVT sensor signal at engine speed of 600 rpm or higher (1 trip detection logic).	Open or short in VVT sensor (for intake camshaft of bank 2) circuit VVT sensor (for intake camshaft of bank 2) Intake camshaft Valve timing ECM	Comes on	DTC stored
P0347	Camshaft Position Sensor "A" Circuit Low Input (Bank 2)	The output voltage of the VVT sensor is less than 0.3 V for 4 seconds (1 trip detection logic).	Open or short in VVT sensor (for intake camshaft of bank 2) circuit VVT sensor (for intake camshaft of bank 2) ECM	Comes on	DTC stored
P0348	Camshaft Position Sensor "A" Circuit High Input (Bank 2)	The output voltage of the VVT sensor is higher than 4.7 V for 4 seconds (1 trip detection logic).	Open or short in VVT sensor (for intake camshaft of bank 2) circuit VVT sensor (for intake camshaft of bank 2) ECM	Comes on	DTC stored


*a	5 V/DIV.
*b	20 ms./DIV.

Reference: Inspection using an oscilloscope.

Tech Tips

The correct waveform is as shown.
The wavelength becomes shorter as the engine speed increases.

ECM Terminal Name

CH1: Between VV1+ and VV1-

CH2: Between VV2+ and VV2-

Tester Range

5 V/DIV., 20 ms./DIV.

Condition

Idling with warm engine

MONITOR DESCRIPTION

If no pulse signal is transmitted by the VVT sensor (for intake camshaft) despite the camshaft rotating, or the rotation of the camshaft and the crankshaft is not synchronized, the ECM interprets this as a malfunction of the sensor.

Also, when the sensor output voltage remains at less than 0.3 V, or higher than 4.7 V for 4 seconds, the ECM stores a DTC.

MONITOR STRATEGY

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

CONFIRMATION DRIVING PATTERN

Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the engine switch off and wait for at least 30 seconds.
Turn the engine switch on (IG).
Turn the GTS on.
Start the engine.
Idle the engine for 10 seconds or more [A].
Enter the following menus: Powertrain / Engine / Trouble Codes [B].
Read the pending DTCs.
Tech Tips
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P0340, P0342, P0343, P0345, P0347 or P0348.

Check the DTC judgment result.

GTS Display	Description
NORMAL	DTC judgment completed System normal
ABNORMAL	DTC judgment completed System abnormal
INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions
N/A	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

Tech Tips

If the judgment result shows NORMAL, the system is normal.
If the judgment result shows ABNORMAL, the system has a malfunction.
If the judgment result shows INCOMPLETE or N/A, perform steps [A] and [B] again.

WIRING DIAGRAM


*a	VVT Sensor (for Intake Camshaft of Bank 1)
*b	VVT Sensor (for Intake Camshaft of Bank 2)

Refer to VC Output Circuit.

Click here

CAUTION / NOTICE / HINT

Tech Tips

If no problem is found through this diagnostic troubleshooting procedure, there may be a mechanical problem with the engine.
Bank 1 refers to the bank that includes the No. 1 cylinder*.

*: The No. 1 cylinder is the cylinder which is farthest from the transmission.
Bank 2 refers to the bank that does not include the No. 1 cylinder.
Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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 TERMINAL VOLTAGE (POWER SOURCE OF VVT SENSOR (FOR INTAKE CAMSHAFT))

Front view of wire harness connector

(to VVT Sensor (for Intake Camshaft))

Bank 1

Bank 2

Disconnect the VVT sensor (for intake camshaft) connector.
Turn the engine switch on (IG).

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

Standard Voltage

Tester Connection	Switch Condition	Specified Condition
E21-3 (VC) - Body ground	Engine switch on (IG)	4.5 to 5.5 V
E27-3 (VC) - Body ground	Engine switch on (IG)	4.5 to 5.5 V

Result

Proceed to
OK
NG

CHECK HARNESS AND CONNECTOR (VVT SENSOR (FOR INTAKE CAMSHAFT) - ECM) Click here

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

Disconnect the E21 or E27 VVT sensor (for intake camshaft) connector.
Disconnect the E1 ECM connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
E21-1 (VVL+) - E1-19 (VV1+)	Always	Below 1 Ω
E21-2 (VVL-) - E1-29 (VV1-)	Always	Below 1 Ω
E27-1 (VVR+) - E1-20 (VV2+)	Always	Below 1 Ω
E27-2 (VVR-) - E1-30 (VV2-)	Always	Below 1 Ω
E21-1 (VVL+) or E1-19 (VV1+) - Body ground and other terminals	Always	10 kΩ or higher
E21-2 (VVL-) or E1-29 (VV1-) - Body ground and other terminals	Always	10 kΩ or higher
E27-1 (VVR+) or E1-20 (VV2+) - Body ground and other terminals	Always	10 kΩ or higher
E27-2 (VVR-) or E1-30 (VV2-) - Body ground and other terminals	Always	10 kΩ or higher

Result

Proceed to
OK
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK SENSOR INSTALLATION (VVT SENSOR (FOR INTAKE CAMSHAFT))

*a	OK
*b	NG
*c	Clearance

Check the VVT sensor (for intake camshaft) installation.

OK
VVT sensor (for intake camshaft) is installed correctly.

Result

Proceed to
OK
NG

SECURELY REINSTALL VVT SENSOR (FOR INTAKE CAMSHAFT) Click here

CHECK INTAKE CAMSHAFT (TIMING ROTOR)

Check the timing rotor of the intake camshaft.

OK
Camshaft timing rotor does not have any cracks or deformation.

Tech Tips

Perform "Inspection After Repair" after replacing the intake camshaft.

Click here

Result

Proceed to
OK
NG

REPLACE INTAKE CAMSHAFT Click here

CHECK VALVE TIMING (CHECK FOR LOOSE TIMING CHAIN AND JUMPED TEETH)

Result

Proceed to
OK
NG

*a	Timing Mark	*b	Approximately 68°
*c	Approximately 16°	*d	Approximately 32°
*e	Approximately 50°	-	-

Remove the cylinder head cover sub-assembly.

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

Check that the timing marks of the camshaft timing intake gear assemblies and camshaft timing exhaust gear assemblies are at the positions shown in the illustration.

OK
The timing marks on the camshaft timing intake gear assemblies are aligned as shown in the illustration.

Tech Tips

If the result is not as specified, check for mechanical malfunctions that may have affected the valve timing, such as a jumped tooth or stretching of the timing chain.
When checking the valve timing, make sure the camshaft timing intake gear assemblies are set to the most retarded position and the camshaft timing exhaust gear assemblies are set to the most advanced position. When the VVT system is normal and the engine is stopped, the camshaft timing intake gear assemblies stop at the center of their operation range and the camshaft timing exhaust gear assemblies stop at the most advanced position.

Result

Proceed to
OK
NG

CHECK ENGINE MECHANICAL SYSTEM Click here

REPLACE VVT SENSOR (FOR INTAKE CAMSHAFT)

Replace the VVT sensor (for intake camshaft).

Click here

Result

Proceed to
NEXT

CHECK WHETHER DTC OUTPUT RECURS (DTC P0340, P0342, P0343, P0345, P0347 AND P0348)

Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Clear the DTCs.

Powertrain > Engine > Clear DTCs
Turn the engine switch off and wait for at least 30 seconds.
Start the engine.
Turn the GTS on.
Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine / Trouble Codes.

Powertrain > Engine > Trouble Codes

Read the pending DTCs.

Result

Result	Proceed to
DTC P0340, P0342, P0343, P0345, P0347 and/or P0348 is output	A
DTCs are not output	B

Tech Tips

If the engine does not start, replace the ECM.

REPLACE ECM Click here

END

CHECK ENGINE MECHANICAL SYSTEM

Check for mechanical malfunctions that affect the valve timing, such as a jumped tooth or stretching of the timing chain.

Click here

Result

Proceed to
OK
NG

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

CHECK WHETHER DTC OUTPUT RECURS (DTC P0340, P0342, P0343, P0345, P0347 AND P0348)

Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Clear the DTCs.

Powertrain > Engine > Clear DTCs
Turn the engine switch off and wait for at least 30 seconds.
Start the engine.
Turn the GTS on.
Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine / Trouble Codes.

Powertrain > Engine > Trouble Codes

Read the pending DTCs.

Result

Result	Proceed to
DTC P0340, P0342, P0343, P0345, P0347 and/or P0348 is output	A
DTCs are not output	B

REPLACE ECM Click here

CHECK FOR INTERMITTENT PROBLEMS Click here

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

Disconnect the E21 and E27 VVT sensor (for intake camshaft) connectors.
Disconnect the E2 ECM connector.
Disconnect the c1 crankshaft position sensor connector.
Disconnect the E16 and E29 VVT sensor (for exhaust camshaft) connectors.
Disconnect the E37 camshaft position sensor connector.
Disconnect the U34 canister pump module connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
E21-3 (VC) - E2-26 (VC)	Always	Below 1 Ω
E27-3 (VC) - E2-26 (VC)	Always	Below 1 Ω
E21-3 (VC), E27-3 (VC) or E2-26 (VC) - Body ground and other terminals	Always	10 kΩ or higher

Result

Proceed to
OK
NG

REPLACE ECM Click here

REPAIR OR REPLACE HARNESS OR CONNECTOR