СИСТЕМА ECD (для моделей с контроллером свечей накаливания), Diagnostic DTC:P0340, P0342, P0343, P0344

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)
P0344	Camshaft Position Sensor "A" Circuit Intermittent (Bank 1 or Single Sensor)

DESCRIPTION

The camshaft position sensor (G signal sensor) consists of a magnet and MRE (Magneto Resistance Element).

The camshaft timing gear has a crankshaft position sensor plate for the camshaft position sensor. When the camshaft rotates, changes occur in the air gaps between the sensor plate and MRE, which affects the magnetic field. As a result, the resistance of the MRE material fluctuates. The camshaft position sensor converts the camshaft rotation data to pulse signals, uses the pulse signals to determine the camshaft angle, and sends it to the ECM. Then the ECM uses this data to control fuel injection time and injection timing.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory
P0340	Camshaft Position Sensor Circuit	Either of following conditions is met: (1 trip detection logic) No camshaft position sensor signal to ECM Phase deviation in crankshaft and camshaft position sensor signals	Open or short in camshaft position sensor circuit Camshaft position sensor Crankshaft position sensor plate ECM	Comes on	DTC stored
P0342	Camshaft Position Sensor "A" Circuit Low Input (Bank 1 or Single Sensor)	Output voltage of camshaft position sensor is below 0.3 V for 4 seconds (1 trip detection logic)	Open or short in camshaft position sensor circuit Camshaft position sensor ECM	Comes on	DTC stored
P0343	Camshaft Position Sensor "A" Circuit High Input (Bank 1 or Single Sensor)	Output voltage of camshaft position sensor is higher than 4.7 V for 4 seconds (1 trip detection logic)	Open or short in camshaft position sensor circuit Camshaft position sensor ECM	Comes on	DTC stored
P0344	Camshaft Position Sensor "A" Circuit Intermittent (Bank 1 or Single Sensor)	Wrong pattern of signal from camshaft position sensor is detected (1 trip detection logic)	Open or short in camshaft position sensor circuit Camshaft position sensor Crankshaft position sensor plate Valve timing ECM	Comes on	DTC stored

DTC Detection Drive Pattern
DTC No.	DTC Detection Drive Pattern
P0340	Engine cranks 4 revolutions or more
P0342	Idle engine for 4 seconds
P0343	Idle engine for 4 seconds
P0344	Engine cranks 6 revolutions or more

WIRING DIAGRAM

Refer to DTC P0335.

CAUTION / NOTICE / HINT

Note

When replacing the ECM, perform ECM Initialization and Registration.

Tech Tips

When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing a new ECM, perform all of the initialization and registration procedures for the "Learning Values Write" function by following the instructions shown on the GTS display.
Read freeze frame data using the GTS. 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, and other data from the time the malfunction occurred.

PROCEDURE

CHECK TERMINAL VOLTAGE (POWER SOURCE OF CAMSHAFT POSITION SENSOR)

B0043U8C07

*a	Front view of wire harness connector (to Camshaft Position Sensor)

Disconnect the camshaft position sensor connector.
Turn the ignition switch to ON.

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

Standard Voltage

Tester Connection	Condition	Specified Condition
B117-3 (VG) - Body ground	Ignition switch ON	4.5 to 5.5 V

Result

Proceed to
OK
NG

NG

CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - ECM) Click here

OK

CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - ECM)

Disconnect the camshaft position sensor connector.
Disconnect the ECM connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
B117-1 (G1) - B212-83 (G+)	Always	Below 1 Ω
B117-2 (G-) - B212-115 (G-)	Always	Below 1 Ω
B117-1 (G1) or B212-83 (G+) - Body ground and other terminals	Always	10 kΩ or higher
B117-2 (G-) or B212-115 (G-) - Body ground and other terminals	Always	10 kΩ or higher

Result

Proceed to
OK
NG

NG

GO TO STEP 11 Click here

OK

CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR)

B0041VAC02

*a	OK
*b	NG
*c	Clearance

Check the camshaft position sensor installation.

OK
Sensor is installed correctly.

Result

Proceed to
OK
NG

NG

SECURELY REINSTALL SENSOR Click here

OK

CHECK CRANKSHAFT POSITION SENSOR PLATE

Check the crankshaft position sensor plate.

OK
Sensor plate does not have any cracks or deformation.

Result

Proceed to
OK
NG

NG

REPLACE CRANKSHAFT POSITION SENSOR PLATE Click here

OK

REPLACE CAMSHAFT POSITION SENSOR

Replace the camshaft position sensor.

Result

Proceed to
NEXT

NEXT

CHECK WHETHER DTC OUTPUT RECURS (DTC P0340, P0342, P0343 AND/OR P0344)

Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs.

Powertrain > Engine and ECT > Clear DTCs
Start the engine.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

Read the DTCs.

Powertrain > Engine and ECT > Trouble Codes

Result

Result	Proceed to
DTC P0340, P0342, P0343 and/or P0344 is output	A
DTC is not output	B

B

END

A

ADJUST VALVE TIMING

Adjust the valve timing.

Result

Proceed to
NEXT

NEXT

GO TO STEP 12 Click here

REPLACE CRANKSHAFT POSITION SENSOR PLATE

Replace the crankshaft position sensor plate.

Result

Proceed to
NEXT

NEXT

GO TO STEP 12 Click here

SECURELY REINSTALL SENSOR

Securely reinstall the camshaft position sensor.

Result

Proceed to
NEXT

NEXT

GO TO STEP 12 Click here

CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - ECM)

Disconnect the camshaft position sensor connector.
Disconnect the ECM connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
B117-3 (VG) - B212-68 (VCG)	Always	Below 1 Ω
B117-3 (VG) or B212-68 (VCG) - Body ground and other terminals	Always	10 kΩ or higher

Result

Proceed to
OK
NG

OK

GO TO STEP 12 Click here

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result

Proceed to
NEXT

NEXT

CHECK WHETHER DTC OUTPUT RECURS (DTC P0340, P0342, P0343 AND/OR P0344)

Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs.

Powertrain > Engine and ECT > Clear DTCs
Start the engine.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

Read the DTCs.

Powertrain > Engine and ECT > Trouble Codes

Result

Result	Proceed to
DTC P0340, P0342, P0343 and/or P0344 is output	A
DTC is not output	B

B

END

A

REPLACE ECM

Replace the ECM.

Result

Proceed to
NEXT

NEXT

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Clear the DTCs.

Powertrain > Engine and ECT > Clear DTCs
Start the engine.
Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

Confirm that the DTC is not output again.

Powertrain > Engine and ECT > Trouble Codes

Result

Proceed to
NEXT

NEXT

END