DTC P1447 FUEL TANK SENSOR CONTROL VALVE CIRCUIT HIGH
|
|
DTC P1447 FUEL TANK SENSOR CONTROL VALVE
CIRCUIT HIGH
|
Detect the open or short circuit of tank
pressure switching solenoid.
Judge NG when the ECM output level is different
from actual terminal level.
(A)
|
Vent control
(solenoid OFF)
|
(C)
|
During
diagnostics (Solenoid ON)
|
(E)
|
Plug
|
(B)
|
Atmosphere
|
(D)
|
To pressure
sensor
|
|
|
|
Secondary
Parameters
|
Enable
Conditions
|
None
|
|
Always perform the diagnosis continuously.
Abnormality Judgment
Judge NG when the cumulative time of completing
the malfunction criteria below becomes more than 2.5 seconds.
Judgment
Value
|
Malfunction
Criteria
|
Threshold
Value
|
Battery
voltage
|
≥ 10.9
V
|
After
engine starting
|
1
second or more
|
Terminal
output voltage when ECM sent ON signals
|
High
|
Ignition
switch
|
ON
|
Time Needed for Diagnosis:
2.5
seconds
Malfunction Indicator
Light Illumination:
Illuminates when malfunction occurs in
two continuous drive cycles.
Normality Judgment
Judge OK when the malfunction criteria below
are completed.
Judgment
Value
|
Malfunction
Criteria
|
Threshold
Value
|
Battery
voltage
|
≥ 10.9
V
|
After
engine starting
|
1
second or more
|
Terminal
output voltage when ECM sent OFF signals
|
Low
|
Ignition
switch
|
ON
|
|
•
|
When the OK idling cycle is completed 40 times
in a row
|
|
•
|
When “Clear Memory” was
performed
|
|
MALFUNCTION
INDICATOR LIGHT CLEAR CONDITION
|
|
•
|
When the OK driving cycle is completed 3 times
in a row
|
|
•
|
When “Clear Memory” was
performed
|
None
|
ECM OPERATION
AT DTC SETTING
|
Memorize the freeze frame data. (For test
mode $02)
