Subaru Legacy IV (2008 year). Service manual — part 635
GD(H6DO)-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(H6DO)-161
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
DB: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
GD(H6DO)-162
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
DC:DTC P1152 O2 SENSOR CIRCUIT RANGE/PERFORMANCE (LOW)
(BANK1 SENSOR1)
1. OUTLINE OF DIAGNOSIS
Detect that
O value remains low.
Judge as NG when lambda value is abnormal in accordance with
O value of front oxygen (A/F) sensor and
running conditions such as vehicle speed, amount of intake air, engine coolant temperature, sub feedback
control, etc.
2. COMPONENT DESCRIPTION
O value = Actual air fuel ratio/Theoretical air fuel ratio
O > 1: Lean
O < 1: Rich
(A)
Electromotive force
(C)
Lean
(D)
Rich
(B)
Air fuel ratio
(1)
Atmosphere
(3)
ZrO
2
(4)
Ceramic heater
(2)
Exhaust gas
(1)
(2)
(4)
(2)
(3)
EN-01693
(C)
(B)
(D)
(A)
GD(H6DO)-163
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
3. ENABLE CONDITION
4. GENERAL DRIVING CYCLE
Perform diagnosis continuously at a constant speed of 20 km/h (12.4 MPH) or more after 60000 ms have
passed since the engine started.
5. 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: 10000 ms
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cy-
cles.
• Normality Judgement
Judge as OK and clear the NG if the continuous time while the following conditions are established is more
than the predetermined time.
Time Needed for Diagnosis: Less than 1 second
Secondary Parameters
Enable Conditions
Time needed for all secondary parameters to be in enable
conditions
t 4096 ms
Battery voltage
t 10.9 V
Barometric pressure
t 75 kPa (563 mmHg, 22.2 inHg)
Rear oxygen sensor sub feedback
Execution
Rear oxygen sensor output voltage – Feedback target voltage
–0.2 V — 0.1 V
or rear oxygen sensor sub feedback compensation coefficient
On Min.
or rear oxygen sensor sub feedback compensation coefficient
On Max.
Elapsed time after starting the engine
t 60000 ms
Engine coolant temperature
t 75 °C (167 °F)
Vehicle speed
t 20 km/h (12.4 MPH)
Amount of intake air
t 8 g/s (0.28 oz/s)
Load change at 120°CA
< 0.02 g/rev (0 oz/rev)
Front oxygen (A/F) sensor impedance
0
: — 50 :
Learning value of evaporation gas density
< 0.2
Total time of operating canister purge
t 19.9 s
Targeted lambda value load compensation coefficient
–0.05 — 0.050
Judgement Value
Malfunction criteria
Threshold value
O value
< 0.85
Judgement Value
Malfunction criteria
Threshold value
O value
t 0.85
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