P1343

1UR-FSE ENGINE CONTROL SYSTEM: SFI SYSTEM: P1340, P1342, P1343: Camshaft Position Sensor "A" (Bank 1 Sensor 2)
P1343 - Camshaft Position Sensor "A" High Input (MRE)

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.





- Reference: Inspection using an oscilloscope.





HINT
- The correct waveform is as shown.
- VV1+ and VV2+ stand for the VVT sensor (for intake side) signal, and NE+ stands for the CKP sensor signal.





MONITOR DESCRIPTION

If no signal is transmitted by the camshaft position sensor despite the engine running, or the rotations of the camshaft and crankshaft are not synchronized, the ECM interprets this as a malfunction of the sensor. Also, when the sensor output voltage remains below 0.3 V, or higher than 4.7 V for more than 4 seconds, the ECM stores a DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS

P1340 (Camshaft position sensor range check):





P1340 (Camshaft position/Crankshaft position misalignment):





P1342, P1343 (Camshaft position sensor range check [low voltage, high voltage]):





TYPICAL MALFUNCTION THRESHOLDS

P1340 (Camshaft position sensor range check):





P1340 (Camshaft position/Crankshaft position misalignment):





P1342 (Camshaft position sensor range check [low voltage]):





P1343 (Camshaft position sensor range check [high voltage]):





COMPONENT OPERATING RANGE





CONFIRMATION DRIVING PATTERN





1. Connect the Techstream to the DLC3.

2. Turn the engine switch on (IG) and turn the Techstream on.

3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure) Reading and Clearing Diagnostic Trouble Codes.

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

5. Turn the engine switch on (IG) and turn the Techstream on [A].

6. Start the engine.

7. Idle the engine for 10 seconds or more [B].

8. Enter the following menus: Powertrain / Engine / Trouble Codes / Pending.

9. Read the pending DTCs [C].

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 / Utility / All Readiness.

11. Input the DTC: P1340, P1342 or P1343.

12. Check the DTC judgment result.





HINT
If the judgment result shows INCOMPLETE or N/A, perform steps [B] through [C] again.

13. If the test result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs Reading and Clearing Diagnostic Trouble Codes.

HINT
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.

WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
- Read freeze frame data using the Techstream. 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, if the air-fuel ratio was lean or rich and other data from the time the malfunction occurred.
- 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.

PROCEDURE

1. CHECK CAMSHAFT POSITION SENSOR (SENSOR POWER SOURCE)





(a) Disconnect the E20 camshaft position sensor connector.

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

Standard voltage:





NG -- CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - ECM)
OK -- Continue to next step.

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





(a) Disconnect the E20 camshaft position sensor connector.

(b) Disconnect the E2 ECM connector.

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

Standard resistance (Check for open):





Standard resistance (Check for short):





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. CHECK SENSOR INSTALLATION





(a) Check the sensor installation.

OK:

Sensor is installed correctly.

NG -- SECURELY REINSTALL Installation
OK -- Continue to next step.

4. INSPECT CAMSHAFT TIMING GEAR ASSEMBLY (BANK 2)

(a) Check the teeth of the sensor plate.

OK:

Sensor plate teeth do not have any cracks or deformation.

NG -- REPLACE CAMSHAFT TIMING GEAR ASSEMBLY (BANK 2) Disassembly
OK -- Continue to next step.

5. CHECK VALVE TIMING P0016

NG -- ADJUST VALVE TIMING Installation
OK -- Continue to next step.

6. REPLACE CAMSHAFT POSITION SENSOR

(a) Replace the camshaft position sensor Removal.

NEXT -- Continue to next step.

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

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the Techstream on.

(d) Clear DTCs Reading and Clearing Diagnostic Trouble Codes.

(e) Start the engine.

(f) Enter the following menus: Powertrain / Engine / Trouble Codes.

(g) Read DTCs.

Result:





HINT
If the engine does not start, replace the ECM.

B -- REPLACE ECM Removal

A -- END

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





(a) Disconnect the E20 camshaft position sensor connector.

(b) Disconnect the E1 ECM connector.

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

Standard resistance (Check for open):





Standard resistance (Check for short):





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE ECM Removal