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P0011 P0012

DTC    P0011    Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 1)

DTC    P0012    Camshaft Position "A" - Timing Over-Retarded (Bank 1)


 

DESCRIPTION

Refer to DTC P0010.
 

DTC No. DTC Detection Condition Trouble Area
P0011 Intake valve timing is stuck at a certain value when in the advance range (1 trip detection logic).
  1. Valve timing
  2. Camshaft timing oil control valve assembly
  3. Oil control valve filter
  4. Camshaft timing gear assembly
  5. ECM
P0012 Intake valve timing is stuck at a certain value when in the retard range (2 trip detection logic).

MONITOR DESCRIPTION

The ECM optimizes the intake valve timing using the VVT (Variable Valve Timing) system to control the intake camshaft. The VVT system includes the ECM, the camshaft timing oil control valve assembly and the camshaft timing gear assembly. The ECM sends a target duty-cycle control signal to the camshaft timing oil control valve assembly. This control signal regulates the oil pressure supplied to the camshaft timing gear assembly. The camshaft timing gear assembly can advance or retard the intake camshaft.
If the difference between the target and actual intake valve timing is large, and changes in the actual intake valve timing are small, the ECM interprets this as a camshaft timing gear assembly stuck malfunction and sets a DTC.

  1. Example:
  2. A DTC is set when the following conditions "A" and "B" are met:
    1. It takes 5 seconds or more to change the valve timing by 5°CA (Condition "A").
    2. After the above condition is met, the camshaft timing oil control valve is forcibly activated for 63 times (when the vehicle is idling, this takes approximately 100 seconds) (Condition "B").
  3. The monitor will run if all of the following conditions are met:
  4. DTC P0011 (Advanced Cam Timing) is subject to 1 trip detection logic.
  5. DTC P0012 (Retarded Cam Timing) is subject to 2 trip detection logic.
  6. These DTCs indicate that the camshaft timing gear assembly cannot operate properly due to camshaft timing oil control valve assembly malfunctions or the presence of foreign objects in the camshaft timing oil control valve assembly.

 

MONITOR STRATEGY

 

Required Sensors/Components (Main) Camshaft timing oil control valve and camshaft timing gear assembly
Required Sensors/Components (Related) Crankshaft position sensor
Camshaft position sensor
Engine coolant temperature sensor
Frequency of Operation Continuous

 

CONFIRMATION DRIVING PATTERN


P0011 P0012  / Lexus CT200h / ZWA10

 

  1. Connect the intelligent tester to the DLC3.
  2. Turn the power switch on (IG) and turn the tester on.
  3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC operation).

     

    HINT:
     
    1. P0011 is output:
      Clear the DTC without using the tester.
    2. P0012 is output:
      Clear the DTC with using the tester.

     

  4. Turn the power switch off and wait for 30 seconds.
  5. Turn the power switch on (IG) and turn the tester on [A].
  6. Put the engine in inspection mode (maintenance mode).
  7. Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [B].
  8. Accelerate the vehicle to 75 km/h (47 mph) or more by depressing the accelerator pedal for at least 10 seconds [C].

     

    CAUTION:
     
    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

     

  9. Idle the engine for 30 seconds or more [D].
  10. Enter the following menus: Powertrain / Engine and ECT / DTC / Pending.
  11. Read the pending DTC [E].

     

    HINT:
     
    1. If a pending DTC is output, the system is malfunctioning.
    2. If a pending DTC is not output, perform the following procedure.

     

  12. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
  13. Input the DTC: P0011 or P0012.
  14. Check the DTC judgment result.
     
    Tester Display Description
    NORMAL
    1. DTC judgment completed
    2. System normal
    ABNORMAL
    1. DTC judgment completed
    2. System abnormal
    INCOMPLETE
    1. DTC judgment not completed
    2. Perform driving pattern after confirming DTC enabling conditions
    UNKNOWN
    1. Unable to perform DTC judgment
    2. Number of DTCs which do not fulfill DTC preconditions has reached ECU's memory limit

     

    HINT:
     
    1. If the judgment result shows NORMAL, the system is normal.
    2. If the judgment result shows ABNORMAL, the system has a malfunction.
    3. If the judgment result shows INCOMPLETE or UNKNOWN, perform steps [F] through [H].

     

  15. Accelerate the vehicle to 75 km/h (47 mph) or more by depressing the accelerator pedal for at least 10 seconds [F].

     

    CAUTION:
     
    When performing the confirmation driving pattern, obey all speed limits and traffic laws.

     

  16. Idle the engine for 30 seconds or more [G].
  17. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
  18. Input the DTC: P0011 or P0012.
  19. Check the DTC judgment result again [H].

     

    HINT:
     
    1. If the judgment result shows NORMAL, the system is normal.
    2. If the judgment result shows ABNORMAL, the system has a malfunction.

     

WIRING DIAGRAM

Refer to DTC P0010.
 

INSPECTION PROCEDURE

 

HINT:
 
  1. DTC P0011 or P0012 may be set when foreign objects in the engine oil are caught in some parts of the system. The DTC will remain set even if the system returns to normal after a short time. Foreign objects are filtered out by the oil filter.
  2. 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 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.
1.CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0011 OR P0012)
  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Turn the tester on.

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

  1. Read the DTCs.

    Result 
    Result Proceed to
    DTC P0011 or P0012 is output A
    DTC P0011 or P0012 and other DTCs are output B

     

     

    HINT:
     
    If any DTCs other than P0011 or P0012 are output, troubleshoot those DTCs first.

     

     

 

  B
GO TO DTC CHART 
 
A  
 
2.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (OPERATE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY)
  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Turn the tester on.

  1. Put the engine in inspection mode (maintenance mode).

  1. Start the engine.

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

  1. Check the engine speed while operating the camshaft timing oil control valve assembly using the tester.
     

    OK 
    Tester Operation Specified Condition
    0% Normal engine speed
    100% Engine idles roughly or stalls

     

     

    HINT:
     
    1. If the result is not acceptable, cool the engine (engine coolant temperature is 30°C (86°F) or less) and perform the Active Test again.
    2. Test not possible with park (P) selected during charge control. Move shift lever to N to perform test.

     

     

 

  NG
Go to step 4
 
OK  
 
3.CHECK WHETHER DTC OUTPUT RECURS (DTC P0011 OR P0012)
  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Turn the tester on.

  1. Clear the DTCs.

     

    HINT:
     
    1. P0011 is output:
      Clear the DTC without using the tester.
    2. P0012 is output:
      Clear the DTC with using the tester.

     

     

  1. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.

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

  1. Read the pending DTCs.

    Result 
    Result Proceed to
    DTC is not output A
    DTC P0011 or P0012 is output B

     

     

    HINT:
     
    DTC P0011 or P0012 may be set when foreign objects in the engine oil are caught in some parts of the system. The DTC will remain set even if the system returns to normal after a short time. Foreign objects are filtered out by the oil filter.

     

     

 

  B
Go to step 7
 
A  
 
CHECK FOR INTERMITTENT PROBLEMS  

 

4.INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY
  1. Inspect the camshaft timing oil control valve assembly.

  NG
REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY
 
OK  
 
5.INSPECT CAMSHAFT TIMING GEAR ASSEMBLY
  1. Inspect the camshaft timing gear assembly.

 

  NG
REPLACE CAMSHAFT TIMING GEAR ASSEMBLY 
 
OK  
 
6.INSPECT OIL CONTROL VALVE FILTER


 

P0011 P0012  / Lexus CT200h / ZWA10
  1. Remove the oil control valve filter.

  1. Check that the filter is not clogged.

     

    OK:
    Filter is not clogged.

     

     

 

  NG
REPLACE OIL CONTROL VALVE FILTER 
 
OK  
 
7.ADJUST VALVE TIMING
P0011 P0012  / Lexus CT200h / ZWA10

 

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 
*a Top
*b Alignment Mark
*c No. 1 Cylinder at TDC Compression

 

NEXT  
 
8.CHECK WHETHER DTC OUTPUT RECURS (DTC P0011 OR P0012)
  1. Connect the intelligent tester to the DLC3.

  1. Turn the power switch on (IG).

  1. Turn the tester on.

  1. Clear the DTCs.

     

    HINT:
     
    1. P0011 is output:
      Clear the DTC without using the tester.
    2. P0012 is output:
      Clear the DTC with using the tester.

     

     

  1. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.

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

  1. Read the pending DTCs.

    Result 
    Result Proceed to
    DTC is not output A
    DTC P0011 or P0012 is output B

     

 

  B
REPLACE ECM 
 
A  
 
END