Toyota 2GR-FE, Manual

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ES–100
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
ES
MONITOR DESCRIPTION
The ECM optimizes the valve timing using the VVT system to control the exhaust camshaft. The VVT
system includes the ECM, the OCV and the 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. The VVT
controller can advance or retard the exhaust camshaft.
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 determines the existence of a malfunction and sets the DTC
when the actual duty-cycle ratio varies from the target duty-cycle ratio.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
COMPONENT OPERATING RANGE
Related DTCs
P0013: VVT OCV (bank 1) open/short
P0023: VVT OCV (bank 2) open/short
Required sensors / components (Main) VVT OCV (Variable Valve Timing oil control valve)
Required sensors / components (Sub) -
Frequency of operation Continuous
Duration 1 second
MIL operation Immediate
Sequence of operation None
Monitor runs whenever following DTCs are not present None
All of the following conditions are met: -
Starter OFF
Engine switch ON
Time after engine switch off to on 0.5 seconds or more
One of the following conditions is met: Condition A, B or C
A. All of the following conditions are met: -
Battery voltage 11 to 13 V
Target duty ratio Less than 70%
Output signal duty ratio 100 %
B. All of the following conditions are met: -
Battery voltage 13 V or more
Target duty ratio Less than 80%
Output duty ratio 100 %
C. All of the following conditions are met: -
Current cut status Not cut
Output signal duty ratio 3% or less
VVT duty ratio More than 3, and less than 100 %