Toyota 2GR-FE Manual page 244

ES–88
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
Related DTCs
Required sensors / components (Main)
Required sensors / components (Sub)
Frequency of operation
Duration
MIL operation
ES
Sequence of operation
TYPICAL ENABLING CONDITIONS
Monitor will run whenever these DTCs are not present
All of the following conditions are met:
Starter
Engine switch
Time after turning ignition switch off to on (IG)
TYPICAL MALFUNCTION THRESHOLDS
One of the following conditions is met:
A. All of the following conditions are met:
Battery voltage
Target duty ratio
Output signal duty ratio
B. All of the following conditions are met:
Battery voltage
Target duty ratio
Output signal duty ratio
C. All of the following conditions are met:
Current cut status
Output signal duty ratio
COMPONENT OPERATING RANGE
VVT OCV duty ratio
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
P0010: VVT OCV (bank 1) open/short
P0020: VVT OCV (bank 2) open/short
VVT OCV (Variable Valve Timing oil control valve)
-
Continuous
1 second
Immediately
None
None
-
OFF
ON
0.5 seconds or more
Condition A, B or C
-
11 to 13 V
Less than 70 %
100 %
-
13 V or more
Less than 80 %
100 %
-
Not cut
3 % or less
More than 3 %, and Less than 100 %