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

WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.

The electric VVT changes the valve timing using a motor In comparison to a conventional hydraulic VVT, the valve timing range is greater and the VVT operates even when the engine speed 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 diagnosis signals (VTM) to the ECM.

PART AND TERMINAL NAME REFERENCE CHART

Part and Terminal Name	Function
Camshaft timing control motor	Through its electric motor, operates camshaft timing gear assembly Interior driver 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 as a duty ratio Open circuit in VTP and VTM Normal Internal malfunction in driver Malfunction in motor rotation sensor of driver

Fig 1: Driver And Motor Function Diagram

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Symptoms and Fail-safe Operation During Camshaft Control Motor Malfunction

VEHICLE CONDITION CHART

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 DETECTION CONDITION CHART

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)