Toyota Avalon V6-3.5L (2GR-FE) Diagnostic Trouble Codes ( DTC ): P Code Page 1

Toyota Avalon V6-3.5L (2GR-FE) Diagnostic Trouble Codes ( DTC ): P Code Page 1

A L L Diagnostic Trouble Codes ( DTC ): P Code Charts

Engine Control System - SFI System (to 12/2010)

2GR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: P0010, P0020: Camshaft Position "A" Actuator Circuit (Bank 1)

P0020 - Camshaft Position "A" Actuator Circuit (Bank 2)

DESCRIPTION

The Variable Valve Timing (VVT) system includes the ECM, Oil Control Valve (OCV) and VVT controller. The ECM sends a target duty-cycle

control signal to the OCV. This control signal regulates the oil pressure supplied to the VVT 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

OCV, based on the signals transmitted by several sensors. The VVT controller regulates the intake camshaft angle using oil pressure through the

OCV. 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.

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.

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS