DTC P0447 EVAPORATIVE EMISSION CONTROL SYSTEM VENT CONTROL CIRCUIT OPEN
DTC P0447 EVAPORATIVE EMISSION CONTROL SYSTEM VENT CONTROL CIRCUIT OPEN |
OUTLINE OF DIAGNOSIS |
Detect the open or short circuit of drain valve.
Judge NG when the ECM output level is different from the actual terminal level.
COMPONENT DESCRIPTION |
(1)
|
Bobbin
|
(8)
|
Magnetic
plate
|
(15)
|
Diaphragm
|
(2)
|
Coil
|
(9)
|
Shaft
|
(16)
|
Moving
core
|
(3)
|
Diode
|
(10)
|
Plate
|
(17)
|
Spring
|
(4)
|
Stator
core
|
(11)
|
Valve
|
(18)
|
Cover
|
(5)
|
End plate
|
(12)
|
Housing
|
(19)
|
O-ring
|
(6)
|
Body
|
(13)
|
Filter
|
||
(7)
|
Yoke
|
(14)
|
Retainer
|
ENABLE CONDITION |
Secondary Parameters | Enable Conditions |
None
|
GENERAL DRIVING CYCLE |
Always perform the diagnosis continuously.
DIAGNOSTIC METHOD |
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 |
Ignition
switch
|
ON
|
Battery
voltage
|
≥ 10.9
V
|
After
engine starting
|
1
second or more
|
Terminal
output voltage when ECM sends OFF signal
|
Low
|
Time Needed for Diagnosis: 2.5 seconds
Malfunction Indicator Light Illumination: Illuminates as soon as the malfunction occurs.
Normality Judgment
Judge OK and clear the NG when the malfunction criteria below are completed.Judgment Value
Malfunction Criteria | Threshold Value |
Ignition
switch
|
ON
|
Battery
voltage
|
≥ 10.9
V
|
After
engine starting
|
1
second or more
|
Terminal
output voltage when ECM sends OFF signal
|
High
|
DTC CLEAR CONDITION |
• |
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
|
FAIL SAFE |
PCV control: Open the PCV solenoid.
ECM OPERATION AT DTC SETTING |
Memorize the freeze frame data. (For test mode $02)