2NZ-FE ENGINE CONTROL  SFI SYSTEM  P0340  Camshaft Position Sensor Circuit  


DESCRIPTION

The camshaft position sensor consists of a magnet and an iron core which is wrapped with copper wire, and is installed onto the cylinder head. When the camshaft rotates, each of 3 teeth on the camshaft timing rotor passes through the camshaft position sensor. This activates the internal magnet in the sensor, generating a voltage in the copper wire. The camshaft rotation is synchronized with the crankshaft rotation. When the crankshaft turns twice, the voltage is generated 3 times in the camshaft position sensor. The generated voltage in the sensor acts as a signal, allowing the ECM to locate the camshaft position. This signal is then used to control ignition timing, fuel injection timing, and the VVT system.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0340 Camshaft Position Sensor Circuit When one of the following conditions is met:
·

No camshaft position sensor signal to the ECM at an engine speed of 600 rpm or higher (1 trip detection logic).

·

No camshaft position sensor signal to the ECM while cranking (2 trip detection logic).


·

Open or short in camshaft position sensor circuit

·

Camshaft position sensor

·

Intake camshaft

·

Valve timing

·

ECM


Comes on DTC stored

Reference: Inspection using an oscilloscope.

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MONITOR DESCRIPTION

If no signal is transmitted by the camshaft position sensor 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.

MONITOR STRATEGY

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

CONFIRMATION DRIVING PATTERN

1.

Connect the GTS to the DLC3.

2.

Turn the ignition switch to ON and turn the GTS on.

3.

Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

4.

Turn the ignition switch off and wait for at least 30 seconds.

5.

Turn the ignition switch to ON and turn the GTS on.

6.

Start the engine.

7.

Idle the engine for 10 seconds or more.

8.

Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

9.

Read the pending DTCs.

HINT:
·

If a pending DTC is output, the system is malfunctioning.

·

If a pending DTC is not output, perform the following procedure.



10.

Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

11.

Input the DTC: P0340.

12.

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



HINT:
·

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 the Confirmation Driving Pattern and check the DTC judgment result again.




WIRING DIAGRAM

Refer to DTC P0335.

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CAUTION / NOTICE / HINT

HINT:
·

If no problem is found through this diagnostic troubleshooting procedure, there may be a mechanical problem with the engine.

·

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

1.INSPECT CAMSHAFT POSITION SENSOR
a.

Inspect the camshaft position sensor.

Click hereEngine / Hybrid System>2NZ-FE ENGINE CONTROL>CAMSHAFT POSITION SENSOR>INSPECTION


Result:
Proceed to
OK
NG



OK

2.CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - ECM)

NG

REPLACE CAMSHAFT POSITION SENSOR

Click hereEngine / Hybrid System>2NZ-FE ENGINE CONTROL>CAMSHAFT POSITION SENSOR>REMOVAL


2.CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - ECM)
a.

Disconnect the camshaft position sensor connector.


b.

Disconnect the ECM connector.


c.

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

Standard Resistance:
Tester Connection Condition Specified Condition
B57-1 - B56-99 (G2+) Always Below 1 Ω
B57-2 - B56-121 (NE-) Always Below 1 Ω
B57-1 or B56-99 (G2+) - Body ground Always 10 kΩ or higher
B57-2 or B56-121 (NE-) - Body ground Always 10 kΩ or higher



Result:
Proceed to
OK
NG



OK

3.CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR)
B319222C02
2.208,1.583 2.5,1.844 0.292,0.26 10 false *a 0.469,1.781 0.781,1.979 0.313,0.198 10 false OK 2.667,1.781 2.979,1.979 0.313,0.198 10 false NG
*a Clearance


a.

Check the camshaft position sensor installation.

OK:

Camshaft position sensor is installed correctly.



Result:
Proceed to
OK
NG



OK

4.CHECK VALVE TIMING (CHECK FOR LOOSE TIMING CHAIN AND JUMPED TOOTH)

NG

SECURELY REINSTALL SENSOR

Click hereEngine / Hybrid System>2NZ-FE ENGINE CONTROL>CAMSHAFT POSITION SENSOR>INSTALLATION


4.CHECK VALVE TIMING (CHECK FOR LOOSE TIMING CHAIN AND JUMPED TOOTH)

Click hereEngine / Hybrid System>2NZ-FE ENGINE CONTROL>SFI SYSTEM>P0011

Result:
Proceed to
OK
NG



OK

5.INSPECT CAMSHAFT (TIMING ROTOR)

NG

8.CHECK ENGINE MECHANICAL SYSTEM
5.INSPECT CAMSHAFT (TIMING ROTOR)
a.

Check the timing rotor of the intake camshaft.

OK:

Camshaft timing rotor does not have any cracks or deformation.



Result:
Proceed to
OK
NG



OK

6.REPLACE CAMSHAFT POSITION SENSOR

NG

REPLACE CAMSHAFT

Click hereEngine / Hybrid System>2NZ-FE ENGINE MECHANICAL>CAMSHAFT>REMOVAL


6.REPLACE CAMSHAFT POSITION SENSOR
a.

Replace the camshaft position sensor.

Click hereEngine / Hybrid System>2NZ-FE ENGINE CONTROL>CAMSHAFT POSITION SENSOR>REMOVAL


Result:
Proceed to
NEXT



NEXT

7.CHECK WHETHER DTC OUTPUT RECURS (DTC P0340)
7.CHECK WHETHER DTC OUTPUT RECURS (DTC P0340)
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Clear the DTCs.

Powertrain > Engine and ECT > Clear DTCs
50002 234

e.

Turn the ignition switch off and wait for at least 30 seconds.


f.

Start the engine.


g.

Turn the GTS on.


h.

Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.


i.

Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.


j.

Read the DTCs.

Powertrain > Engine and ECT > Trouble Codes
50001 234

Result:
Result Proceed to
DTC P0340 is output A
DTCs are not output B


HINT:

If the engine does not start, replace the ECM.



A

REPLACE ECM

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B

END

8.CHECK ENGINE MECHANICAL SYSTEM
a.

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


Result:
Proceed to
OK
NG



OK

9.CHECK WHETHER DTC OUTPUT RECURS (DTC P0340)

NG

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

9.CHECK WHETHER DTC OUTPUT RECURS (DTC P0340)
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Clear the DTCs.

Powertrain > Engine and ECT > Clear DTCs
50002 234

e.

Turn the ignition switch off and wait for at least 30 seconds.


f.

Start the engine.


g.

Turn the GTS on.


h.

Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.


i.

Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.


j.

Read the DTCs.

Powertrain > Engine and ECT > Trouble Codes
50001 234

Result:
Result Proceed to
DTC P0340 is output A
DTCs are not output B


HINT:

If the engine does not start, replace the ECM.



A

END

B

CHECK FOR INTERMITTENT PROBLEMS

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