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P0015








2ZR-FE ENGINE CONTROL: SFI SYSTEM: P0014,P0015: Camshaft Position "B" - Timing Over-Advanced or System Performance (Bank 1)

DTC P0014 - Camshaft Position "B" - Timing Over-Advanced or System Performance (Bank 1)

DTC P0015 - Camshaft Position "B" - Timing Over-Retarded (Bank 1)

DESCRIPTION

The VVT (variable valve timing) system adjusts the exhaust valve timing to improve driveability. The engine oil pressure turns the VVT controller to adjust the valve timing.
The camshaft timing oil control valve is a solenoid valve and switches the engine oil line. The valve moves when the ECM applies 12 V to the solenoid. The ECM changes the energizing time to the solenoid (duty-cycle) in accordance with the camshaft position, crankshaft position, throttle position, etc.










MONITOR DESCRIPTION

The ECM optimizes the exhaust valve timing using the VVT (Variable Valve Timing) system to control the exhaust camshaft. The VVT system includes the ECM, the camshaft timing oil control valve and the VVT controller (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 VVT controller. The VVT controller can advance or retard the exhaust camshaft.
If the difference between the target and actual exhaust valve timing is large, and changes in the actual exhaust 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 1, 2 and 3 are met:
1. The difference between the target and actual exhaust valve timing is more than 5°CA (Crankshaft Angle) and the condition continues for more than 4.5 seconds.
2. It takes 5 seconds or more to change the valve timing by 5°CA.
3 After above conditions 1 and 2 are met, the camshaft timing oil control valve assembly is forcibly activated during 10 seconds.
- DTC P0014 (Advanced Cam Timing) is subject to 2 trip detection logic.
- DTC P0015 (Retarded Cam Timing) is subject to 1 trip detection logic.
- These DTCs indicate that the VVT controller 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.
- The monitor will run if all of 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 40 mph (64 km/h) for 3 minutes.
- The engine has idled for 3 minutes.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS

Advanced Camshaft Timing





Retarded Camshaft Timing





WIRING DIAGRAM





INSPECTION PROCEDURE
HINT: Read freeze frame data using the Techstream. The ECM 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 P0014 OR P0015)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
(e) Read the DTCs.
Result:





HINT: If any DTCs other than P0014 or P0015 are output, troubleshoot those DTCs first.

B -- GO TO DTC CHART
A -- Continue to next step.
2. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY)
(a) Connect the Techstream to the DLC3.
(b) Start the engine.
(c) Turn the Techstream on.
(d) Turn the A/C switch to ON.
(e) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT Exhaust Linear (Bank 1).
(f) Check the engine speed while operating the camshaft timing oil control valve assembly (for exhaust camshaft) using the Techstream.
Result:





HINT: If the result is not acceptable, cool the engine and perform the Active Test again.
(g) Start the engine when the engine coolant temperature is 30°C (86°F) or less.
(h) Turn the Techstream on.
(i) Turn the A/C switch to ON.
(j) Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT Exhaust Linear (Bank 1).
(k) Check the engine speed while operating the camshaft timing oil control valve assembly (for exhaust camshaft) using the Techstream with the engine coolant temperature is 50°C (122°F) or less.
Result:






NG -- INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR EXHAUST CAMSHAFT)
OK -- Continue to next step.
3. CHECK WHETHER DTC OUTPUT RECURS (DTC P0014 OR P0015)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear DTCs DTC Check / Clear.
(e) Start the engine and warm it up.
(f) Switch the ECM from normal mode to check mode using the Techstream Check Mode Procedure.
(g) Allow the engine to idle for 3 minutes or more.
(h) Drive the vehicle for more than 10 minutes.
(i) Read the DTCs.
Result:






B -- ADJUST VALVE TIMING
A -- CHECK FOR INTERMITTENT PROBLEMS
4. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR EXHAUST CAMSHAFT)




(a) Remove the camshaft timing oil control valve assembly (for exhaust camshaft) Removal.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:









(c) Apply the positive battery voltage to terminal 1 and negative battery voltage to terminal 2. Check the valve operation.
OK:
Valve moves quickly.
(d) Reinstall the camshaft timing oil control valve assembly (for exhaust camshaft) Installation.
NG -- REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR EXHAUST CAMSHAFT)
OK -- Continue to next step.
5. INSPECT CAMSHAFT TIMING GEAR ASSEMBLY (FOR EXHAUST CAMSHAFT)
(a) Inspect the camshaft timing gear assembly (for exhaust camshaft) Removal.
NG -- REPLACE CAMSHAFT TIMING GEAR ASSEMBLY (FOR EXHAUST CAMSHAFT)
OK -- Continue to next step.
6. INSPECT OIL CONTROL VALVE FILTER
(a) Remove the oil control valve filter Disassembly.




(b) Check that the filter is not clogged.
OK:
Filter is not clogged.
(c) Reinstall the oil control valve filter Reassembly.
NG -- REPLACE OIL CONTROL VALVE FILTER
OK -- Continue to next step.
7. ADJUST VALVE TIMING
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 Removal.





NEXT -- Continue to next step.
8. CHECK WHETHER DTC OUTPUT RECURS (DTC P0014 OR P0015)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Clear DTCs DTC Check / Clear.
(e) Start the engine and warm it up.
(f) Switch the ECM from normal mode to check mode using the Techstream Check Mode Procedure.
(g) Allow the engine to idle for 3 minutes or more.
(h) Drive the vehicle for more than 10 minutes.
(i) Read the DTCs.
Result:





HINT: DTC P0014 or P0015 is stored when foreign objects in engine oil are caught in some part of the system. These codes will remain stored for a short time even after the system returns to normal. These foreign objects may then be captured by the oil filter, thus eliminating the source of the problem.

B -- REPLACE ECM
A -- END
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