СИСТЕМА SFI, 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

The electric VVT changes the valve timing by the motor. In comparison to a conventional hydraulic VVT, the valve timing range is greater and the VVT operates even when the engine rpm is low or the engine is cold. As a result, it is possible to increase engine output and mileage.

The camshaft timing control motor is equipped with a self diagnostic function, which is used to output the duty ratio (when normal: 80%) as a signal (VTM) to the ECM.

Part and Terminal Name Function
Camshaft timing control motor Through its electric motor, operates camshaft timing gear assembly. Interior driver (EDU) detects and performs malfunction diagnosis of motor control, motor rpm and rotation direction.
Camshaft timing gear assembly Changes valve timing by rotating timing chain sprocket
ECM Outputs target rpm and motor rotation direction in response to driving conditions
+B Power supply (when engine switch on (IG), 12 V or more)
PGND Power supply ground
VTP Inputs motor activation signal from ECM
VTS Outputs actual motor rpm
VTD Outputs actual rotation direction
VTM

Outputs malfunction diagnosis results


  • Open circuit in VTP and VTM

  • Normal

  • Internal malfunction in driver

  • Malfunction in motor rotation sensor of driver
A0019LLE12
CAMSHAFT CONTROL MOTOR SYMPTOMS AND FAIL-SAFE DURING MALFUNCTION
Vehicle Condition Fail-Safe

  • Deterioration of driving performance as result of engine combustion degradation

  • Engine output deficiency

  • Power to camshaft timing control motor is cut

  • Valve timing of bank that is operating normally is fixed at maximum retard angle
DTC No. DTC Detection Condition Trouble Area
P0010

One of the following is detected in camshaft timing control motor for 3 seconds: 1) IC has overheated; 2) motor is open; or 3) motor has overcurrent

(1 trip detection logic)

  • Camshaft timing control motor (bank 1)

  • Camshaft timing gear assembly (bank 1)
P0020

One of the following is detected in camshaft timing control motor for 3 seconds: 1) IC has overheated; 2) motor is open; or 3) motor has overcurrent

(1 trip detection logic)

  • Camshaft timing control motor (bank 2)

  • Camshaft timing gear assembly (bank 2)

MONITOR DESCRIPTION

This DTC is output when an IC overheat malfunction or an overcurrent malfunction is detected in the intake side camshaft timing control motor. The camshaft timing control motor is equipped with a self diagnostic function, which is used to output diagnosis signals (VTM) to the ECM. If the ECM receives a motor driver interior malfunction signal, a DTC is output immediately (1 trip detection logic). If the engine is idled for 10 seconds, a DTC is detected.

A001EV3E12

CAUTION / NOTICE / HINT

Tech Tips

Read freeze frame data using the intelligent tester. Freeze frame data records 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.

PROCEDURE


  1. INSPECT CAMSHAFT TIMING GEAR ASSEMBLY (BANK 1 OR BANK 2)


    1. Turn the engine switch off.

    2. Remove the camshaft timing control motor Click here.

    3. A001FUN

      Check if the camshaft timing gear assembly's eccentric shaft rotates smoothly.

      OK
      Rotates smoothly

    OK

    REPLACE CAMSHAFT TIMING CONTROL MOTOR (BANK 1 OR BANK 2) Click here

    NG

    REPLACE CAMSHAFT TIMING GEAR ASSEMBLY (BANK 1 OR BANK 2) Click here