Subaru IMPREZA GD 2007 Series Manual page 2333

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Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
EH:DTC P2419 EVAPORATIVE EMISSION SYSTEM SWITCHING VALVE CONTROL
CIRCUIT LOW
1. OUTLINE OF DIAGNOSIS
Detect open or short circuit of the purge control solenoid valve 2.
Judge as NG when the ECM output level differs from the actual terminal level.
2. ENABLE CONDITION
Secondary Parameters
None
3. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
4. DIAGNOSTIC METHOD
Abnormality Judgment
Judge as NG when the continuous time of meeting the malfunction criteria below becomes 2.5 seconds or
more.
Judgment Value
Malfunction Criteria
Ignition switch
Battery voltage
After engine starting
Terminal output voltage when ECM out-
puts OFF signal
Time Needed for Diagnosis: 2.5 seconds
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
Normality Judgment
Judge as OK and clear the NG when the malfunction criteria below are met.
Judgment Value
Malfunction Criteria
Ignition switch
Battery voltage
After engine starting
Terminal output voltage when ECM out-
puts OFF signal
5. DTC CLEAR CONDITION
• When the OK idling cycle is completed 40 times in a row
• When "Clear Memory" is performed
6. MALFUNCTION INDICATOR LIGHT CLEAR CONDITIONS
• When the OK driving cycle is completed three times in a row
• When "Clear Memory" is performed
7. FAIL SAFE
None
8. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)
Enable Conditions
Threshold Value
ON
≥ 10.9 V
1 second or more
Low
Threshold Value
ON
≥ 10.9 V
1 second or more
High
GD(STI)-266