P0010

DTC P0010 Camshaft Position "A" Actuator Circuit (Bank1)

HINT: This DTC relates to the Oil Control Valve.

CIRCUIT DESCRIPTION

DTC Detecting Condition:

The Variable Valve Timing (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. Camshaft timing control is performed based on the engine operation condition such as the intake air volume, throttle position and engine coolant temperature. The ECM controls the OCV based on the signals from several sensors. The VVT controller regulates the intake camshaft angle using the oil pressure through the OCV As a result, the relative position between the camshaft and crankshaft is optimized, the engine torque and the fuel economy improve, and the exhaust emission drops. The ECM detects the actual valve timing using signals from the camshaft position sensor and crankshaft position sensor. The ECM performs feedback control and verifies target valve timing.

MONITOR DESCRIPTION

Monitor Strategy:

Typical Enabling Conditions:

Typical Malfunction Thresholds:

Component Operating Range:

The ECM optimizes the intake valve timing using the Variable Valve Timing (VVT) 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 OCV This control signal regulates the oil pressure supplied to the VVT controller. The VVT controller can advance or retard the intake camshaft. After the ECM sends the "target" duty-cycle signal to the OCV, the ECM monitors the OCV current to establish an "actual" duty-cycle. The ECM determines the existence of a malfunction and sets the DTC when the actual duty-cycle ratio varies from the target duty-cycle ratio.

Wiring Diagram:

INSPECTION PROCEDURE

HINT: Read freeze frame data using the hand-held tester or the 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:

Step 4:

Hand-held tester:

Step 1 - 2:

Step 3:

OBD II scan tool (excluding the hand-held tester):

CHECK FOR INTERMITTENT PROBLEMS

HINT:

Hand-held tester only:
Inspect the vehicle's ECM using check mode. Intermittent problems are easier to detect with the hand-held tester when the ECM is in check mode. In check mode, the ECM uses 1trip detection logic, which is more sensitive to malfunctions than normal mode (default) that uses 2trip detection logic.

a. Clear DTCs.
b. Switch the ECM from normal mode to check mode using a hand-held tester.
c. Perform a simulation test.
d. Check and wiggle the harness(es), the connector(s) and terminal(s).