DTC P1420 FUEL TANK PRESSURE CONTROL SOL. VALVE CIRCUIT HIGH
|
|
DTC P1420 FUEL TANK PRESSURE CONTROL SOL.
VALVE CIRCUIT HIGH
|
Detect open or short circuit of pressure
control solenoid valve.
Judge NG when ECM output level is different
from actual terminal level.
(1)
|
Filter
|
(A)
|
Atmospheric
pressure
|
(2)
|
Coil
|
(B)
|
Shut off
valve
|
(3)
|
Connector
terminal
|
(C)
|
To fuel
tank
|
(4)
|
Diaphragm
|
|
|
(5)
|
Valve
|
|
|
|
Secondary
Parameters
|
Enable
Conditions
|
Ignition
switch
|
ON
|
Battery
voltage
|
≥ 10.9
V
|
After engine
starting
|
1 second
or more
|
Always perform the diagnosis after starting
the engine.
Judge NG when the continuous time of completing
the malfunction criteria below becomes more than time needed for
diagnosis (2.5 seconds). Judge OK and clear the NG when the malfunction
criteria below are not completed.
Judgment
Value
|
Malfunction
Criteria
|
Threshold
Value
|
Terminal
voltage when ECM outputs off signal
|
High
|
Time Needed for Diagnosis:
2.5
seconds
Malfunction Indicator
Light Illumination:
Illuminates when malfunction occurs in
two continuous drive cycles.
|
•
|
When the OK idling cycle was completed 40 times
in a row
|
|
•
|
When “Clear Memory” was
performed
|
|
MALFUNCTION
INDICATOR LIGHT CLEAR CONDITION
|
|
•
|
When the OK driving cycle was completed 3 times
in a row
|
|
•
|
When “Clear Memory” was
performed
|
None
|
ECM OPERATING
AT DTC SETTING
|
Memorize the freeze frame data. (For test
mode $02)
