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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)

for Preparation Click here

DESCRIPTION

The camshaft position sensor for intake camshaft (G2 signal sensor) consists of a magnet and MR element.
The camshaft has a timing rotor for the camshaft position sensor. When the camshaft rotates, changes occur in the air gaps between the timing rotor and MR element, which affects the magnet. As a result, the resistance of the MRE material fluctuates. The camshaft position sensor converts the camshaft rotation data to pulse signals, and uses the pulse signals to determine the camshaft angle, which it sends to the ECM. Then the ECM uses this data to control fuel injection time and injection timing.

DTC No.	DTC Detection Condition	Trouble Area
P0340	When ether of following conditions is met: No camshaft position sensor signal to ECM at engine speed 600 rpm or more (1 trip detection logic) Missing camshaft position sensor signal despite crankshaft position sensor inputs normal at engine speed of 600 rpm or more (1 trip detection logic)	Open or short in camshaft position sensor circuit Camshaft position sensor Intake camshaft Jumped tooth of timing chain for intake camshaft ECM
P0342	Output voltage of camshaft position sensor less than 0.3 V for 4 seconds (1 trip detection logic)	Open or short in camshaft position sensor circuit Camshaft position sensor Intake camshaft Jumped tooth of timing chain for intake camshaft ECM
P0343	Output voltage of 4.7 V for 4 seconds (1 trip detection logic)	Open or short in camshaft position sensor circuit Camshaft position sensor Intake camshaft Jumped tooth of timing chain for intake camshaft ECM

HINT:

DTC P0340 indicates a malfunction relating to the camshaft position sensor circuit (the wire harness between the ECM and camshaft position sensor, and the camshaft position sensor itself).

Reference: Inspection using an oscilloscope (Click here).

WIRING DIAGRAM

Refer to DTC P0335 (Click here).

INSPECTION PROCEDURE

HINT:

Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
If no problem is found through this diagnostic troubleshooting procedure, troubleshoot the engine mechanical system.

1.CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0340, P0342 AND P0343)

Connect the intelligent tester to the DLC3.

Turn the power switch on (IG).

Turn the tester on.

Enter the following menus: Powertrain / Engine and ECT / DTC.

Read the DTCs.
Result:
Result
Proceed to
DTC P0340, P0342 or P0343 is output
A
DTC P0340, P0342 or P0343 and other DTCs are output
B
HINT:
If any DTCs other than P0340, P0342 and P0343 are output, troubleshoot those DTCs first.

GO TO DTC CHART (Click here)

A

2.INSPECT CAMSHAFT POSITION SENSOR (POWER SOURCE)

Disconnect the camshaft position sensor connector.

Turn the power switch on (IG).

Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
Switch Condition
Specified Condition
D18-3 (VC) - Body ground
Power switch on (IG)
4.5 to 5.0 V
Text in Illustration
*1
Front view of wire harness connector
(to Camshaft Position Sensor)

Text in Illustration
*1	Front view of wire harness connector (to Camshaft Position Sensor)

Reconnect the camshaft position sensor connector.

Go to step 10

OK

3.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 (Check for Open):

Tester Connection
Condition
Specified Condition
D18-1 (VVI+) - D28-76 (G2+)
Always
Below 1 Ω
D18-2 (VVI-) - D28-122 (G2-)
Always
Below 1 Ω

Standard Resistance (Check for Short):

Tester Connection
Condition
Specified Condition
D18-1 (VVI+) or D28-76 (G2+) - Body ground
Always
10 kΩ or higher
D18-2 (VVI-) or D28-122 (G2-) - Body ground
Always
10 kΩ or higher

Text in Illustration
*1
Front view of wire harness connector
(to Camshaft Position Sensor)
*2
Front view of wire harness connector
(to ECM)

Text in Illustration
*1	Front view of wire harness connector (to Camshaft Position Sensor)	*2	Front view of wire harness connector (to ECM)

Reconnect the camshaft position sensor connector.

Reconnect the ECM connector.

REPAIR OR REPLACE HARNESS OR CONNECTOR (CAMSHAFT POSITION SENSOR - ECM)

OK

4.CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR)

Check the camshaft position sensor installation.
OK:
Sensor is installed correctly.

SECURELY REINSTALL SENSOR (Click here)

OK

5.INSPECT INTAKE CAMSHAFT (TIMING ROTOR)

Check the timing rotor of the intake camshaft.
OK:
Camshaft timing rotor does not have any cracks or deformation.

REPLACE INTAKE CAMSHAFT (Click here)

OK

6.REPLACE CAMSHAFT POSITION SENSOR

Replace the camshaft position sensor (Click here).

NEXT

7.CHECK WHETHER DTC OUTPUT RECURS (P0340, P0342 OR P0343)

Connect the intelligent tester to the DLC3.

Turn the power switch on (IG).

Turn the tester on.

Clear the DTCs (Click here).

Put the engine in inspection mode (Click here).

Start the engine and wait for 10 seconds.

Enter the following menus: Powertrain / Engine and ECT / DTC.

Read the DTCs.
Result:
Result
Proceed to
DTC P0340, P0342 or P0343 is output
A
DTC is not output
B
HINT:
If the engine does not start, replace the ECM.

END

A

8.ADJUST VALVE TIMING

HINT:

There are no marks on the cylinder head to match-up for the purpose of checking valve timing. Valve timing can only be inspected by lining up the colored plates on the timing chain with the marks on the pulleys. It may be necessary to remove and reinstall the chain to match-up the alignment marks (Click here).

Text in Illustration
*1	Top
*2	Alignment Mark
*3	No. 1 Cylinder at TDC Compression

NEXT

9.CHECK WHETHER DTC OUTPUT RECURS (P0340, P0342 OR P0343)

Connect the intelligent tester to the DLC3.

Turn the power switch on (IG).

Turn the tester on.

Clear the DTCs (Click here).

Put the engine in inspection mode (Click here).

Start the engine and wait for 10 seconds.

Enter the following menus: Powertrain / Engine and ECT / DTC.

Read the DTCs.
Result:
Result
Proceed to
DTC is not output
A
DTC P0340, P0342 or P0343 is output
B
HINT:
If the engine does not start, replace the ECM.

REPLACE ECM (Click here)

END

10.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 (Check for Open):

Tester Connection
Condition
Specified Condition
D18-3 (VC) - D28-99 (VCV1)
Always
Below 1 Ω

Standard Resistance (Check for Short):

Tester Connection
Condition
Specified Condition
D18-3 (VC) or D28-99 (VCV1) - Body ground
Always
10 kΩ or higher

Text in Illustration
*1
Front view of wire harness connector
(to Camshaft Position Sensor)
*2
Front view of wire harness connector
(to ECM)

Reconnect the camshaft position sensor connector.

Reconnect the ECM connector.