P2645

DTC P2645 OCV FOR VVTL CIRCUIT (BANK 1)

CIRCUIT DESCRIPTION

DTC Detection Conditions:

In order to improve engine performance at low and high engine speeds, the VVTL-i (Variable Valve Timing and Lift-intelligent) system varies the lift of the intake and exhaust valves using the standard (low and mid speeds) cam and high lift (high speed) cam. This delivers high engine performance without affecting fuel economy or emission performance. When the engine speed reaches 6,000 rpm, the ECM signals the OCV for VVTL-i to switch from the standard cam to the high lift cam, using hydraulic (engine oil) pressure. At high engine speeds, the ECM stimulates the OCV (Oil Control Valve) to apply hydraulic pressure to the piston located in the rocker arm, and switches the rocker arm by locking the slipper.

MONITOR DESCRIPTION

Monitor Strategy:

Typical Enabling Conditions:

Typical Malfunction Thresholds:

At high engine speeds, the VVTL-i actuator regulates the hydraulic pressure applied to the shims on the high lift cam side. Switching from the standard to high lift cam allows the lift of the intake and exhaust valves to be increased. The engine exhaust capacity is also enhanced. As a result, the engine power is boosted When the engine speed is 6,500 rpm or more, the ECM increases the OCV control signal duty ratio, and opens the oil passage to the VVTL-i actuator. The actuator activates the shims and the intake and exhaust valves on the high lift cam side. The ECM monitors the current flowing into the OCV to determine the actual duty ratio of the control signal. If the duty ratio is outside the normal range, the ECM interprets this as a malfunction in the OCV. The ECM illuminates the MIL and sets the DTC.

Wiring Diagram:

INSPECTION PROCEDURE

HINT: Read freeze frame data using a hand-held tester or OBD II scan tool. Freeze frame data record the engine condition when malfunctions are detected. 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.

Step 1 - 2:

Step 3 - 4:

Hand-held tester

Step 1 - 2:

Step 3:

OBD II scan tool (excluding hand-held tester)