P0010

2TR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0010: Camshaft Position "A" Actuator Circuit (Bank 1)
P0010 - Camshaft Position "A" Actuator Circuit (Bank 1)

CAUTION / NOTICE / HINT

HINT
This DTC relates to the Oil Control Valve (OCV).

DESCRIPTION

The Variable Valve Timing (VVT) system includes the ECM, 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 according to engine operating conditions such as the intake air volume, throttle valve position and engine coolant temperature.

The ECM controls the OCV, based on the signals transmitted by several sensors. The VVT controller regulates the intake camshaft angle using oil pressure through the OCV. 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 optimizes the valve timing using the VVT system to control the intake camshaft. The VVT system includes the ECM, the 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.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE





WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
Read freeze frame data using the Techstream. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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.

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE OCV)

(a) Connect the Techstream to the DLC3.

(b) Start the engine and turn the Techstream ON.

(c) Warm up the engine.

(d) On the Techstream, enter the following menus: Powertrain / Engine and ECT / Active Test / Control the VVT System (Bank 1).

(e) Check the engine speed while operating the Oil Control Valve (OCV) using the Techstream.

Result:





OK -- CHECK FOR INTERMITTENT PROBLEMS Check for Intermittent Problems
NG -- Continue to next step.

2. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (OCV SIGNAL)





(a) Disconnect the C2 OCV connector.

(b) While idling, check the waveform between the terminals of the OCV connector using an oscilloscope.

Standard:





(c) Reconnect the OCV connector.

OK -- REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY
NG -- Continue to next step.

3. INSPECT ECM (OCV SIGNAL)





(a) Inspect the ECM using an oscilloscope.

(b) While idling, check the waveform between the terminals of the ECM connector.

Standard:





NG -- REPLACE ECM Removal

OK -- REPAIR OR REPLACE HARNESS OR CONNECTOR