TechDoc

DTC P1340 Camshaft Position Sensor "A" (Bank 1 Sensor 2)
DTC P1342 Camshaft Position Sensor "A" Low Input (MRE)
DTC P1343 Camshaft Position Sensor "A" High Input (MRE)

для подготовки Нажмите здесь

DESCRIPTION

The camshaft position sensor system consists of a signal plate (installed on the camshaft timing gear RH) and Magnetic Resistance Element (MRE) type cam position sensor. The signal plate has 3 protrusions. When it rotates, the magnetic vector (direction of magnetic field) applied to the camshaft's MRE 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 G2 signal is output to the ECM. The ECM uses the G2 signal to distinguish between the cylinders and detect the camshaft position.

DTC No.	DTC Detection Condition	Trouble Area
P1340	When either condition below is met: No camshaft position sensor signal to ECM during cranking (2 trip detection logic) No camshaft position sensor signal to ECM in appropriate timing with 600 rpm or more (misalignment of crankshaft/camshaft) (1 trip detection logic)	Open or short in camshaft position sensor circuit Camshaft position sensor Camshaft timing gear Jumped tooth of timing chain ECM
P1342	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 Camshaft timing gear ECM
P1343	Output voltage of camshaft position sensor more than 4.7 V for 4 seconds (1 trip detection logic)	Open or short in camshaft position sensor circuit Camshaft position sensor Camshaft timing gear ECM

MONITOR DESCRIPTION

If there is no signal from the camshaft position sensor even though the engine is turning, or if the rotation of the camshaft and the crankshaft is not synchronized, the ECM interprets this as a malfunction of the sensor.
When the sensor output voltage remains less than 0.3 V, or more than 4.7 V for more than 5 seconds, the ECM sets a DTC.

WIRING DIAGRAM

INSPECTION PROCEDURE

WAVEFORMS (REFERENCE)

Camshaft position sensor.

Crankshaft position sensor.
Item
Content
Tester Connection
(a) E2-24 (G2+) - E2-32 (G2-)
(b) E1-27 (NE+) - E1-34 (NE-)
Tester Range
5 V/DIV, 20 msec./DIV
Condition
Idle after engine warmed-up
ПРИМЕЧАНИЕ:
The wavelength becomes shorter as the engine rpm increases.

УКАЗАНИЕ:

Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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.

1.CHECK CAMSHAFT POSITION SENSOR (SENSOR POWER SOURCE)

Disconnect the E20 camshaft position sensor connector.

Measure the voltage according to the value(s) in the table below.
Standard voltage:
Tester Connection
Switch Condition
Specified Condition
E20-3 (VC) - Body ground
Engine switch on (IG)
4.5 to 5.0 V

Перейдите к шагу 8

OK

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

Disconnect the E20 camshaft position sensor connector.

Disconnect the E2 ECM connector.

Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):
Tester Connection
Condition
Specified Condition
E20-1 (G22+) - E2-24 (G2+)
Always
Below 1 Ω
E20-2 (G22-) - E2-32 (G2-)
Always
Below 1 Ω
Standard resistance (Check for short):
Tester Connection
Condition
Specified Condition
E20-1 (G22+) or E2-24 (G2+) - Body ground
Always
10 kΩ or higher
E20-2 (G22-) or E2-32 (G2-) - Body ground
Always
10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR)

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

SECURELY REINSTALL SENSOR (Нажмите здесь)

OK

4.INSPECT CAMSHAFT TIMING PLATE

Check the teeth of the sensor plate.
OK:
Sensor plate teeth do not have any cracks or deformation.

REPLACE CAMSHAFT TIMING PLATE (Нажмите здесь)

OK

5.CHECK VALVE TIMING

Remove the cylinder head cover bank 1 and bank 2.

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

Rotate the crankshaft pulley and align its notch to timing mark 0 of the timing chain cover. Check that the timing marks of the camshaft timing gears and camshaft timing exhaust gears are at the positions shown in the illustration.
OK:
Timing marks on camshaft timing gears are aligned as shown in the illustration.

Reinstall the cylinder head cover.

ADJUST VALVE TIMING (Нажмите здесь)

OK

6.REPLACE CAMSHAFT POSITION SENSOR

Replace the camshaft position sensor (see page Нажмите здесь).

NEXT

7.CHECK WHETHER DTC OUTPUT RECURS (P1340, P1342 AND/OR P1343)

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 / DTC / Pending Codes.

Read DTCs.

Result:

Display (DTC Output)
Proceed to
No output
A
P1340, P1342 and/or P1343
B
УКАЗАНИЕ:
If the engine does not start, replace the ECM.

REPLACE ECM (Нажмите здесь)

END

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

Disconnect the E20 camshaft position sensor connector.

Disconnect the E1 ECM connector.

Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):
Tester Connection
Condition
Specified Condition
E20-3 (VC) - E1-18 (VC)
Always
Below 1 Ω
Standard resistance (Check for short):
Tester Connection
Condition
Specified Condition
E20-3 (VC) or E1-18 (VC) - Body ground
Always
10 kΩ or higher