SFI SYSTEM, Diagnostic DTC:P0010, P0020

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

DESCRIPTION

Tech Tips

These DTCs relate to the oil control valve for intake camshaft.

The variable valve timing system includes the ECM, oil control valve and variable valve timing controller. The ECM sends a target duty-cycle control signal to the oil control valve. This control signal regulates the oil pressure applied to the variable valve timing controller. Camshaft timing control is performed according to engine operating conditions such as intake air volume, throttle valve position and engine coolant temperature.

The ECM controls the oil control valve, based on the signals transmitted by several sensors. The variable valve timing controller regulates the intake camshaft angle using oil pressure through the oil control valve. 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.

A017FJ5E15
DTC No. DTC Detection Condition Trouble Area
P0010 Open or short in oil control valve circuit (1 trip detection logic)

  • Open or short in oil control valve circuit for intake camshaft

  • Oil control valve for intake camshaft (bank 1)

  • ECM
P0020 Open or short in oil control valve circuit (1 trip detection logic)

  • Open or short in oil control valve circuit for intake camshaft

  • Oil control valve for intake camshaft (bank 2)

  • ECM

WIRING DIAGRAM

A017FJJE10

INSPECTION PROCEDURE

Tech Tips


  • If DTC P0010 is displayed, check the bank 1 VVT system circuit.

  • Bank 1 refers to the bank that includes cylinder No. 1.

  • If DTC P0020 is displayed, check the bank 2 VVT system circuit.

  • Bank 2 refers to the bank that does not include cylinder No. 1.

  • Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.

PROCEDURE


  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (OPERATE OIL CONTROL VALVE)


    1. Connect the intelligent tester to the DLC3.

    2. Start the engine and turn the tester on.

    3. Warm up the engine and idle it.

    4. Select the following menu items on the tester: Powertrain / Engine and ECT / Active Test / Control the VVT system (Bank 1) or Control the VVT System (Bank 2).

    5. Check the engine speed while operating the oil control valve using the tester.

      OK
      Tester Operation Specified Condition
      Oil control valve OFF Normal engine idle speed
      Oil control valve ON Engine idles roughly or stalls (soon after oil control valve switched from OFF to ON)

    NG

    INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT) Click here

    OK

    CHECK FOR INTERMITTENT PROBLEMS

  2. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY (FOR INTAKE CAMSHAFT)


    1. A017DB8E03

      Disconnect the intake camshaft timing oil control valve connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard resistance
      Tester Connection Condition Specified Condition
      1 - 2 20°C (68°F) 6.9 to 7.9 Ω

    3. Reconnect the oil control valve connector.


    NG

    REPLACE CAMSHAFT TIMING OIL CONTROL VALVE ASSEMBLY Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (OIL CONTROL VALVE - ECM)


    1. A017ENLE08

      Disconnect the intake camshaft timing oil control valve connector.

    2. Disconnect the ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance (Check for open)
      Bank 1
      Tester Connection Condition Specified Condition
      B3-17 (OC1+) - B24-1 Always Below 1 Ω
      B3-16 (OC1-) - B24-2 Always Below 1 Ω
      Bank 2
      Tester Connection Condition Specified Condition
      B3-15 (OC2+) - B25-1 Always Below 1 Ω
      B3-14 (OC2-) - B25-2 Always Below 1 Ω
      Standard resistance (Check for short)
      Bank 1
      Tester Connection Condition Specified Condition
      B3-17 (OC1+) or B24-1 - Body ground Always 10 kΩ or higher
      B3-16 (OC1-) or B24-2 - Body ground Always 10 kΩ or higher
      Bank 2
      Tester Connection Condition Specified Condition
      B3-15 (OC2+) or B25-1 - Body ground Always 10 kΩ or higher
      B3-14 (OC2-) or B25-2 - Body ground Always 10 kΩ or higher

    4. Reconnect the oil control valve connector.

    5. Reconnect the ECM connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR (OIL CONTROL VALVE - ECM)

    OK

    REPLACE ECM Click here