GSIC - Global Service Information Center

DTC P0010 Camshaft Position "A" Actuator Circuit (Bank 1)
DTC P0020 Camshaft Position "A" Actuator Circuit (Bank 2)

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DESCRIPTION

The Variable Valve Timing (VVT) system controls the intake camshaft to provide the optimal valve timing for every driving condition. This control is performed based on signals regarding intake air volume, throttle position and engine coolant temperature.
The ECM controls the Oil Control Valve (OCV) based on signals output from several sensors. The VVT controller regulates the intake camshaft angle using oil pressure through the OCV. As a result, the relative position between the camshaft and the crankshaft becomes optimal, and the engine torque improves, fuel economy improves, and exhaust emissions decrease under overall driving conditions. Also, the ECM detects the actual valve timing using the signals from the camshaft position sensor and the crankshaft position sensor, and performs feedback control. This is how target valve timing is achieved by the ECM.

DTC No.	DTC Detection Condition	Trouble Area
P0010	Open or short in OCV (bank 1) circuit (1 trip detection logic)	Open or short in OCV (bank 1) circuit OCV (bank 1) ECM
P0020	Open or short in OCV (bank 2) circuit (1 trip detection logic)	Open or short in OCV (bank 2) circuit OCV (bank 2) ECM

MONITOR DESCRIPTION

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 detects a malfunction and sets a DTC when the actual duty-cycle ratio varies from the target duty-cycle ratio.
This monitor runs for 1 second (the first second of engine idle) after the engine is started.

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT:

Read freeze frame data using the intelligent tester. 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.
If DTC P0010 is displayed, check the bank 1 VVT OCV.
If DTC P0020 is displayed, check the bank 2 VVT OCV.
Bank 1 includes cylinder No. 1, but bank 2 does not. Cylinder No. 1 is located in the front part of the engine, opposite the transmission.

1.PERFORM ACTIVE TEST (OCV OPERATION)

Connect the intelligent tester to the DLC3.

Start the engine and warm it up.

Turn the engine switch on (IG) and turn the tester ON.

Enter the following menus: Powertrain / Engine / Active Test / Control the VVT Linear (Bank 1) (or Control the VVT Linear (Bank 2)).

Operate the OCV and check the engine condition at idling.
OK:
Tester Operation
Specified Condition
OCV is OFF
Normal engine RPM
OCV is ON
Rough idle or engine stall

CHECK FOR INTERMITTENT PROBLEMS

NG

2.INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (OPERATION)

Disconnect the E5 or E41 OCV connector.

Apply battery voltage to the terminals of the OCV.

Check the engine speed.
OK:
Rough idle or engine stalled.

REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY

OK

3.CHECK ECM (OCV SIGNAL)

While idling the engine, check the waveform of the ECM connector using an oscilloscope.
OK:
Tester Connection
Specified Condition
E8-34 (OC1+) - E8-33 (OC1-)
Correct waveform is as shown
E6-9 (OC2+) - E6-8 (OC2-)
Correct waveform is as shown

REPLACE ECM

OK

4.CHECK WIRE HARNESS (OCV - ECM)

Disconnect the E5 and E41 OCV connectors.

Disconnect the E6 and E8 ECM connectors.

Measure the resistance of the wire harness side connectors.

Standard resistance:

Tester Connection	Specified Condition
E5-1 - E8-34 (OC1+)	Below 1 Ω
E5-2 - E8-33 (OC1-)	Below 1 Ω
E41-1 - E6-9 (OC2+)	Below 1 Ω
E41-2 - E6-8 (OC2-)	Below 1 Ω
E5-1 or E8-34 (OC1+) - Body ground	10 kΩ or higher
E5-2 or E8-33 (OC1-) - Body ground	10 kΩ or higher
E41-1 or E6-9 (OC2+) - Body ground	10 kΩ or higher
E41-2 or E6-8 (OC2-) - Body ground	10 kΩ or higher

REPAIR OR REPLACE HARNESS AND CONNECTOR