P0011
3MZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0011: Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 1)
DTC P0011 - Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 1)
DTC P0012 - Camshaft Position "A" - Timing Over-Retarded (Bank 1)
DTC P0021 - Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 2)
DTC P0022 - Camshaft Position "A" - Timing Over-Retarded (Bank 2)
DESCRIPTION
The Variable Valve Timing (VVT) system includes the ECM (included in the hybrid vehicle control ECU), oil control valve and VVT controller. The ECM sends a target duty-cycle control signal to the oil control valve. This control signal regulates the oil pressure supplied to the VVT controller. Camshaft timing control is performed according to engine operating conditions such as intake air volume, throttle valve position and engine coolant temperature. The ECM controls oil control valve, based on the signals transmitted by several sensors. The VVT controller regulates the intake camshaft angle using oil pressure through the oil control valve. As a result, the relative positions of the camshaft and crankshaft are optimized, the engine torque and fuel economy improve, and the exhaust emissions decrease under overall driving conditions. The ECM detects the actual intake valve timing using signals from the camshaft and crankshaft position sensors, and performs feedback control. This is how the target intake valve timing is verified by the ECM.
MONITOR DESCRIPTION
The ECM (included in the hybrid vehicle control ECU) optimizes the intake valve timing using the VVT (Variable Valve Timing) system to control the intake camshaft. The VVT system includes the ECM, the oil control valve (OCV) and the VVT controller. The ECM sends a target duty-cycle control signal to the oil control valve. This control signal regulates the oil pressure supplied to the VVT controller. The VVT controller can advance or retard the intake camshaft.
If the difference between the target and actual intake valve timing is large, and changes in actual intake valve timing are small, the ECM interprets this as the VVT controller stuck malfunction and sets a DTC.
Example
A DTC is set when the following conditions (a), (b) and (c) are met:
1. The difference between the target and actual intake valve timing is more than 5° CA (Crankshaft Angle) and the condition continues for more than 9.5 seconds.
2. It takes 5 seconds or more to change the valve timing by 5° CA.
3. After above conditions (a) and (b) are met, the oil control valve is forcibly activated 70 times or more.
DTCs P0011 and P0021 (Advanced Cam Timing) are subject to 1 trip detection logic.
DTCs P0012 and P0022 (Retarded Cam Timing) are subject to 2 trip detection logic.
These DTCs indicate that the VVT controller cannot operate properly due to oil control valve malfunctions or the presence of foreign objects in the oil control valve.
The monitor will not run unless the following conditions are met:
- The engine is warm (the engine coolant temperature is 75°C (167°F) or more).
- The vehicle has been driven at more than 47 mph (75 km/h) for 3 minutes.
- The engine has idled for 3 minutes.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
Advanced camshaft timing:
Retard camshaft timing:
If the difference between the target and actual camshaft timing is greater than the specified value, the ECM (included in the hybrid vehicle control ECU) operates the VVT actuator.
Then, the ECM monitors changes in the camshaft timing for 5 seconds.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
- If DTC P0011 or P0012 is output, check the right bank VVT system (bank 1).
- Bank 1 refers to the bank that includes cylinder No. 1.
- If DTC P0021 or P0022 is output, check the left bank VVT system (bank 2).
- Bank 2 refers to the bank that does not include cylinder No. 1.
- Read freeze frame data using the Techstream. The ECM (included in the hybrid vehicle control ECU) records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
PROCEDURE
1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0011, P0012, P0021 OR P0022)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG) and turn the Techstream on.
(c) Enter the following menu items: Powertrain / Engine and ECT / Monitor.
(d) Read the DTCs.
Result:
HINT: If any DTCs other than P0011, P0012, P0021 or P0022 are output, troubleshoot those DTCs first.
B -- GO TO DTC CHART Diagnostic Trouble Code Descriptions
A -- Continue to next step.
2. PERFORM ACTIVE TEST USING CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG) and turn the Techstream on.
(c) Put the engine in inspection mode Component Tests and General Diagnostics.
(d) Warm up the engine.
(e) Select, the following menu items: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank 1) or Control the VVT System (Bank 2).
(f) Check the engine speed while operating the oil control valve using the Techstream.
OK:
NG -- CHECK VALVE TIMING (CHECK FOR LOOSE OR JUMPED TEETH ON TIMING BELT)
OK -- Continue to next step.
3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0011, P0012, P0021 OR P0022)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG) and turn the Techstream on.
(c) Clear the DTCs.
(d) Start the engine and warm it up.
(e) Switch the ECM (included in the hybrid vehicle control ECU) from normal mode to check mode using the Techstream.
(f) Drive the vehicle for more than 10 minutes.
(g) Read the DTCs using the tester.
OK:
No DTC output.
NG -- CHECK VALVE TIMING (CHECK FOR LOOSE OR JUMPED TEETH ON TIMING BELT)
OK -- CHECK FOR INTERMITTENT PROBLEMS
4. CHECK VALVE TIMING (CHECK FOR LOOSE OR JUMPED TEETH ON TIMING BELT)
(a) Remove the cylinder head covers RH and LH.
(b) Turn the crankshaft pulley, and align its groove with timing mark "0" of the timing belt cover.
(c) Check that the timing marks of the camshaft timing gears are aligned with the timing marks of the No. 3 timing belt cover as shown in the illustration.
If not, turn the crankshaft 1 revolution (360°), then align the marks as above.
OK:
The timing marks on the camshaft timing gears are aligned as shown in the illustration.
(d) Reinstall the cylinder head covers.
NG -- ADJUST VALVE TIMING
OK -- Continue to next step.
5. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY
(a) Remove the oil control valve.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
(c) Apply positive battery voltage to terminal 1 and connect the negative battery terminal to terminal 2. Check the valve operation.
OK:
Valve moves quickly.
(d) Reinstall the oil control valve.
NG -- REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY
OK -- Continue to next step.
6. INSPECT OIL CONTROL VALVE FILTER
(a) Remove the oil control valve filter.
OK:
The filter is not clogged.
NG -- REPLACE OIL CONTROL VALVE FILTER
OK -- Continue to next step.
7. REPLACE CAMSHAFT TIMING GEAR ASSEMBLY
(a) Replace the camshaft timing gear assembly Components.
NEXT -- Continue to next step.
8. READ VALUE USING TECHSTREAM (CHECK IF DTC OUTPUT RECURS)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG) and turn the Techstream on.
(c) Clear the DTCs.
(d) Start the engine and warm up.
(e) Switch the ECM (included in the hybrid vehicle control ECU) from normal mode to the check mode using the Techstream.
(f) Drive the vehicle for more than 10 minutes.
(g) Read the output DTCs using the Techstream.
Standard:
No DTC output.
HINT: DTC P0011, P0012, P0021 or P0022 is output when foreign objects in engine oil are caught in some parts of the system. These codes will remain set even if the system returns to normal after a short time. These foreign objects may then be captured by the oil filter, thus eliminating the source of the problem.
NG -- REPLACE HYBRID VEHICLE CONTROL ECU
OK -- SYSTEM OK