СИСТЕМА SFI, Diagnostic DTC:P1340, P1342, P1343

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.

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.

INSPECTION PROCEDURE

1. WAVEFORMS (REFERENCE)

   
   

   1. Camshaft position sensor.

   2. 

      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

      Note:

      The wavelength becomes shorter as the engine rpm increases.

   Tip:

   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.

PROCEDURE

1. Click here

   CHECK CAMSHAFT POSITION SENSOR (SENSOR POWER SOURCE)

   
   

   1. Disconnect the E20 camshaft position sensor connector.

   2. 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

   
   
   • OKClick here
   • NGClick here
2. Click here

   CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - ECM)

   
   

   1. Disconnect the E20 camshaft position sensor connector.

   2. Disconnect the E2 ECM connector.

   3. 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

   
   
   • OKClick here
   • NGClick here
3. Click here

   CHECK SENSOR INSTALLATION (CAMSHAFT POSITION SENSOR)

   
   

   1. Check the sensor installation.

      OK
      Sensor is installed correctly.

   
   
   • OKClick here
   • NGClick here
4. Click here

   INSPECT CAMSHAFT TIMING GEAR ASSEMBLY (BANK 2)

   
   

   1. Check the teeth of the sensor plate.

      OK
      Sensor plate teeth do not have any cracks or deformation.

   
   
   • OKClick here
   • NGClick here
5. Click here

   CHECK VALVE TIMING

   
   

   1. Remove the cylinder head cover bank 1 and bank 2.

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

   3. 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.

   4. Reinstall the cylinder head cover.

   
   
   • OKClick here
   • NGClick here
6. Click here

   REPLACE CAMSHAFT POSITION SENSOR

   
   

   1. Replace the camshaft position sensor (see pageClick here).

   
   
   • NEXTClick here
7. Click here

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

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the engine switch on (IG).

   3. Turn the tester ON.

   4. Clear DTCs (see pageClick here).

   5. Start the engine.

   6. Enter the following menus: Powertrain / Engine / DTC / Pending Codes.

   7. Read DTCs.

      Result
      Display (DTC Output) Proceed to No output A P1340, P1342 and/or P1343 B

      Tip:

      If the engine does not start, replace the ECM.

   
   
   • AClick here
   • BClick here
8. Click here

   END

9. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR

10. Click here

    SECURELY REINSTALL SENSORClick here

11. Click here

    ADJUST VALVE TIMINGClick here

12. Click here

    REPLACE CAMSHAFT TIMING GEAR ASSEMBLY (BANK 2)Click here

13. Click here

    REPLACE ECMClick here

14. Click here

    CHECK HARNESS AND CONNECTOR (CAMSHAFT POSITION SENSOR - ECM)

    
    

    1. Disconnect the E20 camshaft position sensor connector.

    2. Disconnect the E1 ECM connector.

    3. 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

    
    
    • OKClick here
    • NGClick here
15. Click here

    REPLACE ECMClick here

16. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR