SFI SYSTEM, Diagnostic DTC:P0016

DESCRIPTION

The Variable Valve Timing (VVT) system controls the intake camshaft and exhaust camshaft to achieve optimal valve timing according to various driving conditions. This control is performed based on the intake air volume, throttle valve position, engine coolant temperature and other engine operating conditions. The ECM controls the camshaft timing oil control valves based on the signals transmitted by several sensors. As a result, the relative positions of the camshafts are optimized, improving engine torque and fuel economy and reducing exhaust emissions. In addition, the ECM detects the actual valve timing based on the signals from the VVT sensors and performs feedback control, achieving optimal valve timing.

• To monitor the correlation of the intake camshaft position and crankshaft position, the ECM checks the VVT learned value while the engine is idling. The VVT learned value is calibrated based on the camshaft position and crankshaft position. The intake valve timing is set to the most retarded angle while the engine is idling. If the VVT learned value is out of the specified range in consecutive driving cycles, the ECM illuminates the MIL and stores DTC P0016.

WIRING DIAGRAM

Refer to DTC P0010 Click here.

INSPECTION PROCEDURE

PROCEDURE

1. CHECK FOR ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0016)

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the tester on.

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

   5. Read DTCs.

      Result

      Result	Proceed to
      DTC P0016 is output	A
      DTC P0016 and other DTCs are output	B

      Tech Tips

      If any DTCs other than P0016 are output, troubleshoot those DTCs first.

   
   

   B

   GO TO DTC CHART Click here

   A

2. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (OPERATE CAMSHAFT TIMING OIL CONTROL VALVE)

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Start the engine.

   3. Turn the tester on.

   4. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank 1).

   5. Check the engine speed when the camshaft timing oil control valve is operated using the intelligent tester when the engine coolant temperature is 50°C (122°F) or less.

      Tech Tips

      
      

      • When performing the Active Test, make sure the air conditioning is on.

      • Make sure the engine coolant temperature when the engine is started is 30°C (86°F) or less.

      OK
      Tester Operation Specified Condition Camshaft timing oil control valve OFF Normal engine speed Camshaft timing oil control valve ON Engine idles roughly or stalls soon after camshaft timing oil control valve switched from OFF to ON

   
   

   NG

   INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Click here

   OK

3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0016)

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the tester on.

   4. Clear the DTCs Click here.

   5. Start the engine and warm it up.

   6. Switch the ECM from normal mode to check mode using the tester Click here.

   7. Allow the engine to idle for more than 1 minute.

   8. Drive the vehicle for more than 10 minutes.

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

   10. Read the DTCs.

       Result

       Result	Proceed to
       DTC is not output	A
       DTC P0016 is output	B

       Tech Tips

       DTC P0016 is stored when foreign objects in the engine oil are caught in some parts of the system. This code remains stored for a short time even after the system returns to normal. These foreign objects may then be captured by the oil control valve filter, thus eliminating the source of the problem.

   
   

   B

   CHECK ENGINE MECHANICAL SYSTEM Click here

   A

   CHECK FOR INTERMITTENT PROBLEMS Click here

4. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY

   
   

   1. Inspect the camshaft timing oil control valve assembly Click here.

   2. 

      Connect the positive (+) battery terminal to terminal 1 and the negative (-) battery terminal to terminal 2. Check the valve operation.

      OK
      Valve moves quickly.

   3. Reinstall the camshaft timing oil control valve assembly.

   
   

   NG

   REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Click here

   OK

5. INSPECT CAMSHAFT TIMING GEAR ASSEMBLY

   
   

   1. Inspect the camshaft timing gear assembly Click here.

   
   

   NG

   REPLACE CAMSHAFT TIMING GEAR ASSEMBLY Click here

   OK

6. INSPECT OIL CONTROL VALVE FILTER

   
   

   1. Remove the oil control valve filter.

   2. Check that the filter is not clogged.

      OK
      Filter is not clogged.

   3. Reinstall the oil control valve filter.

   
   

   NG

   REPLACE OIL CONTROL VALVE FILTER

   OK

7. CHECK ENGINE MECHANICAL SYSTEM

   Tech Tips

   There are no marks on the cylinder head to align for the purpose of checking valve timing. Valve timing can only be inspected by aligning the colored plates on the timing chain with the marks on the pulleys. It may be necessary to remove and reinstall the chain to align the timing marks Click here.

   
   

   NEXT

8. CHECK WHETHER DTC OUTPUT RECURS (DTC P0016)

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the tester on.

   4. Clear the DTCs Click here.

   5. Start the engine and warm it up.

   6. Switch the ECM from normal mode to check mode using the tester Click here.

   7. Allow the engine to idle for more than 1 minute.

   8. Drive the vehicle for more than 10 minutes.

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

   10. Read the DTCs.

       Result

       Result	Proceed to
       DTC is not output	A
       DTC P0016 is output	B

   
   

   B

   REPLACE ECM Click here

   A

   END