DTC P0506 IDLE CONTROL SYSTEM RPM LOWER THAN EXPECTED
|
|
DTC P0506 IDLE CONTROL SYSTEM RPM LOWER
THAN EXPECTED
|
Detect the malfunction that actual engine
speed is not close to target engine speed during idling.
Judge NG when actual engine speed is not
close to target engine speed during idling.
(1)
|
Engine
control module (ECM)
|
(2)
|
Detecting
circuit
|
(3)
|
Battery
voltage
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(4)
|
Main relay
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(5)
|
Idle air
control solenoid valve
|
|
Secondary
Parameters
|
Enable
Conditions
|
Engine
coolant temperature
|
≥ 75°C
(167°F)
|
Battery
voltage
|
≥ 10.9
V
|
Atmospheric
pressure
|
> 75.1
kPa (563 mmHg, 22.2 inHg)
|
Fuel
level
|
≥ 9 litres (2.38
US gal, 1.98 Imp gal)
|
After
engine starting
|
10
seconds or more
|
Feedback
in ISC
|
In
operation
|
Measured
lambda
|
0.90 ←→ 1.1
|
After
air condition switching ON-OFF, OFF-ON
|
5
seconds or more
|
After in-manifold
pressure change more than 4 kPa (30 mmHg, 1.2 inHg)
|
> 5
seconds
|
After
neutral switch ON-OFF event
|
> 5
seconds
|
Vehicle
speed
|
0 km/h
(0 MPH)
|
Always perform diagnosis during idling after
engine starting.
Abnormality Judgment
Judge NG when the cumulative time of completing
the malfunction criterion below becomes more than the time needed
for diagnosis (10 seconds × 3 times).
Judgment
Value
|
Malfunction
Criteria
|
Threshold
Value
|
Actual − target
engine speed
|
< −100
rpm
|
Feedback
correction for idle air control solenoid valve
|
Max.
|
Time Needed for Diagnosis:
10
seconds × 3 times
Malfunction Indicator
Light Illumination:
Illuminates when malfunction occurs in
2 continuous driving cycles.
Normality Judgment
Judge OK and clear NG when the continuous
time of completing the malfunction criterion below becomes more
than the time needed for diagnosis (10 seconds).
Judgment
Value
|
Malfunction
Criteria
|
Threshold
Value
|
Actual − target
engine speed
|
≥ −100
rpm
|
|
•
|
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
|
Judgment of heavy fuel: Not allowed to make
the judgment of heavy fuel.
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ECM OPERATION
AT DTC SETTING
|
Memorize the freeze frame data. (For test
mode $02)
