Subaru Legacy IV (2008 year). Service manual — part 427
GD(H4DOTC)-158
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
• Normality Judgement
Judge as OK and clear the NG if the following conditions are established.
Time Needed for Diagnosis:
(1): 2000 ms
(2): 2000 ms
(3): 2000 ms
(4): 2000 ms
(5): 24 ms
(6): 2000 ms
(7): 2000 ms
Judgement Value
Malfunction Criteria
Threshold Value
(1) Difference of CPU reading value of
the throttle position sensor signal
< 0.4058 V
(2) Difference of CPU read value of the
accelerator pedal position sensor signal
< 0.127542424 V
(3) WD pulse from sub CPU
WD pulse occur
(4) Communication between CPU
Possible to communi-
cate
(5) |Throttle position sensor 1 opening
angle — (Throttle position sensor 1
opening angle after passing amplifier) 1/4|
< 3 °
(6) Cruise control cancel signal at brake
ON
Cruise control cancel
signal ON
(7) Brake switch 1, 2 signal
SW 1 and 2 are
matched
GD(H4DOTC)-159
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
CI: DTC P0638 THROTTLE ACTUATOR CONTROL RANGE/PERFORMANCE
(BANK 1)
1. OUTLINE OF DIAGNOSIS
Judge as NG when the target opening angle and actual opening angle is mismatched or the current to motor
is the specified duty or more for specified time continuously.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITION
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously when the electronic throttle control is operating.
(1)
Motor
(3)
Engine control module (ECM)
(4)
Drive circuit
(2)
Throttle position sensor
Secondary Parameters
Enable Conditions
Normal operation of electronic throttle
control
ON
EN-01863
(3)
(4)
(1)
(2)
GD(H4DOTC)-160
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
5. DIAGNOSTIC METHOD
• Abnormality Judgement
Judge as NG when the following conditions are established.
Time Needed for Diagnosis:
• Difference between target opening angle and actual opening angle: 1000 milliseconds (when target open-
ing angle > actual opening angle) or value of Map 2 (when target opening angle
d actual opening angle)
• Output duty to drive circuit: value of Map 3
• Normality Judgement
Judge as OK and clear the NG if the following conditions are established.
Time Needed for Diagnosis:
• Difference between target opening angle and actual opening angle: 2000 ms
• Output duty to drive circuit: 2000 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
Judgement Value
Malfunction Criteria
Threshold Value
Difference between target opening angle
and actual opening angle
t Value of Map 1
Output duty to drive circuit
t 95%
Map1
Target throttle opening angle
(°) = d
0
d d < 6.15
6.15
d d < 9.65
9.65
d d < 14.65
14.65
d d < 26.65
26.65
d d
Difference between target
opening angle and actual
opening angle (°)
3.5
5
12
25
25
Map2
Throttle position sensor 1
opening angle (°) = d
0
d d < 5.5
5.5
d d < 9
9
d d < 13
13
d d < 22
22
d d
Judgement time (milliseconds)
1000
400
300
250
250
Map 3
Voltage to drive circuit (V)
6
8
10
12
14
16
Judgement time (milliseconds)
2000
2000
2000
2000
2000
2000
Judgement Value
Malfunction Criteria
Threshold Value
Difference between target opening angle
and actual opening angle
< Value of Map 1
Output duty to drive circuit
< 95%
GD(H4DOTC)-161
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
CJ:DTC P0700 TRANSMISSION CONTROL SYSTEM (MIL REQUEST)
1. OUTLINE OF DIAGNOSIS
Judge as NG when there is CAN communication with the TCM and there is a MIL lighting request.
2. ENABLE CONDITION
3. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
4. DIAGNOSTIC METHOD
• Abnormality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Time Needed for Diagnosis: 2500 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
• Normality Judgement
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Time Needed for Diagnosis: Less than 1 second
Secondary Parameters
Enable Conditions
None
Judgement Value
Malfunction Criteria
Threshold Value
Battery voltage
t 10.9 V
MIL lighting request from TCM
Yes
Judgement Value
Malfunction Criteria
Threshold Value
Battery voltage
t 10.9 V
MIL lighting request from TCM
None
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