DTC P1446 FUEL TANK SENSOR CONTROL VALVE CIRCUIT LOW
|
|
DTC P1446 FUEL TANK SENSOR CONTROL VALVE
CIRCUIT LOW
|
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)
|
Fuel tank
pressure sensor
|
(B)
|
Ambient
air
|
|
Secondary
Parameters
|
Enable
Conditions
|
None
|
|
Always perform the diagnosis continuously.
Abnormality Judgment
Judge NG when the continuous 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 OFF signals
|
Low
|
Time Needed for Diagnosis:
2.5
seconds
Malfunction Indicator
Light Illumination:
Illuminates when malfunction occurs in
2 continuous driving 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
|
High
|
|
•
|
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)
