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

The VVT-iE system changes the valve timing with the motor.

The camshaft control timing motor is equipped with a self diagnostic function, which is used to output diagnosis signals (VTM) to the ECM.

PART AND TERMINAL NAME REFERENCE

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 as a duty ratio Open circuit in VTP and VTM Normal Internal malfunction in driver Malfunction in motor rotation sensor of driver

Fig 1: Camshaft Position "A" Actuator Communication Diagram

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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 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)