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intake camshaft. The VVT system includes the ECM, Oil Control Valve (OCV) and VVT controller. The ECM sends a target duty-cycle control signal to the OCV. 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 timings is large, and changes in the actual intake valve timing are small, the ECM interprets this as a VVT controller stuck malfunction and stores a DTC. Example: A DTC is stored when the following conditions 1 and 2 are met: 1. It takes 5 seconds or more to change the valve timing by 5°CA. 2. After the above condition 1 is met, the camshaft timing oil control valve is forcibly activated for 10 seconds. DTC P0011 and P0021 (Advanced Cam Timing) are subject to 1 trip detection logic. DTC 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 OCV malfunctions or the Related DTCs P0011: Advanced camshaft timing (for Bank 1) P0012: Retarded camshaft timing (for Bank 1) P0021: Advanced camshaft timing (for Bank 2) P0022: Retarded camshaft timing (for Bank 2) Required Sensors/Components (Main) VVT OCV and VVT Actuator Required Sensors/Components (Related) Crankshaft position sensor, Camshaft position sensor and Engine coolant temperature sensor Duration Within 10 seconds MIL Operation Advanced camshaft timing: Immediate Retarded camshaft timing: 2 driving cycles TYPICAL ENABLING CONDITIONS Monitor runs whenever following DTCs not present P0010, P0020 (VVT oil control valve) P0016, P0018 (VVT system - Misalignment) P0101, P0102, P0103 (Mass air flow meter) P0107, P0108 (Manifold absolute pressure) P0115, P0117, P0118 (Engine coolant temperature sensor) P0125 (Insufficient Coolant Temperature for Closed Loop Fuel Control) P0335 (Crankshaft position sensor) P0340, P1340 (Camshaft position sensor) Battery voltage 11 V or more Engine RPM 500 to 4000 rpm ECT 75 to 100°C (167 to 212°F) 1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0011,P0012,... |