Subaru 2006 Legacy, Manual

Page: 2966 / 4302

GD(H6DO)-16 8
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
CT:DTC P0507 IDLE AIR CONTROL SYSTEM RPM HIGHER THAN EXPECTED
1. OUTLINE OF DIAGNOSIS
Detect the malfunction that actual engine speed is not close to target engine speed during idling. Judge as
NG when actual engine speed is not close to target engine speed during idling.
2. ENABLE CONDITION
3. GENERAL DRIVING CYCLE
Perform the diagnosis continuously at idling after warming up engine.
4. DIAGNOSTIC METHOD
• Abnormality Judgment
Judge as NG when the continuous time of completing the malfunction criterion below is 10 seconds × 3
times.
Time Needed for Diagnosis:
10 seconds × 3 times
Malfunction Indicator Light Illumination:
Illuminates when malfunction occurs in 2 continuous driving cy-
cles.
• Normality Judgment
Judge as OK and clear the NG when the continuous time of completing the malfunction criterion below be-
comes more than the time needed for diagnosis (10 seconds).
5. DTC CLEAR CONDITION
• When the OK idling cycle is completed 40 times in a row
• When “Clear Memory” is performed
Secondary Parameters Enable Conditions
Engine coolant temperature
≥
75°C (167°F)
Battery voltage
≥
10.9V
Atmospheric pressure > 75.1 kPa (563
mmHg, 22.2 inHg)
Fuel level
≥
9.6
2
(2.54 US gal,
2.11 Imp gal)
After engine starting 10 seconds or more
Feedback in ISC In operation
Lambda value (left and right) 0.9
←→
1.1
After air condition switching ON-OFF,
OFF-ON 5.1 seconds or more
After intake manifold pressure changes
more than 4kPa (30 mmHg, 1.2 inHg). > 5.1 sec.
After neutral switch ON/OFF change > 5.1 sec.
Vehicle speed 0 km/h (0 MPH)
Judgment Value
Malfunction Criteria Threshold Value
Actual – Target engine speed
≥
200 rpm
Feedback value for ISC Min.
Judgment Value
Malfunction Criteria Threshold Value
Actual – Target engine speed < 200 rpm
asieps_tobira.book 168 ページ ２００９年１０月２６日 月曜日 午前９時１６分