Subaru Legacy IV (2008 year). Service manual — part 193
GD(H4SO)-74
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
4. DIAGNOSTIC METHOD
• Abnormality Judgement
Judge as NG when the following conditions are established.
After engine start oil temperature sensor characteristic diagnosis timer (timer for diagnosis).
a. Timer stop at fuel cut
b. During the driving conditions except a) above, timer counts up as follows.
64 milliseconds + TOILCNT milliseconds (at the time of 64 milliseconds).
Where, TOILCNT is determined as follows,
TOILCNT = 0 at idle switch ON
For TOILCNT at Idle switch off, refer to the following table.
After engine start oil temperature characteristic diagnosis timer judgment value (t).
t = 1882940 ms – 43302 ms × Ti (t
t 2400000)
Ti = The lowest coolant temperature after starting the engine.
Time Needed for Diagnosis: Less than 1 second
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 following conditions are established.
Time Needed for Diagnosis: Less than 1 second
Judgement Value
Malfunction Criteria
Threshold Value
Engine oil temperature
< 15 °C (59 °F)
After engine start oil temperature sensor
characteristic diagnosis timer.
t Judgement value for after
engine start oil temperature sen-
sor characteristic diagnosis timer
Vehicle speed km/h (MPH)
0 (0)
8 (5)
16 (9.9)
24 (14.9)
32 (19.9)
40 (24.9)
48 (29.8)
56 (34.8)
Temperature
°C (°F)
–30 (–22)
64 ms
73.2 ms
83.9 ms
96.3 ms
113.2 ms
133.9 ms
160.2 ms
194.6 ms
–20 (–4)
64 ms
73.3 ms
84 ms
96.6 ms
113.7 ms
135 ms
162 ms
197.4 ms
–10 (14)
64 ms
73.4 ms
84.2 ms
96.9 ms
114.5 ms
136.4 ms
164.4 ms
201.5 ms
0 (32)
64 ms
73.5 ms
84.5 ms
97.4 ms
115.6 ms
138.5 ms
168 ms
207.6 ms
10 (50)
102.2 ms
114.8 ms
129.4 ms
146.7 ms
171.7 ms
203.4 ms
245.1 ms
302.1 ms
Judgement Value
Malfunction Criteria
Threshold Value
Engine oil temperature
t 15 °C (59 °F)
GD(H4SO)-75
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
AP:DTC P0197 ENGINE OIL TEMPERATURE SENSOR LOW
1. OUTLINE OF DIAGNOSIS
Detect the open or short circuit of the oil temperature sensor.
Judge as NG when outside of the judgment value.
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: 500 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
• 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
None
Judgement Value
Malfunction Criteria
Threshold Value
Output voltage
< 0.166 V
Judgement Value
Malfunction Criteria
Threshold Value
Output voltage
t 0.166 V
GD(H4SO)-76
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
AQ:DTC P0198 ENGINE OIL TEMPERATURE SENSOR HIGH
1. OUTLINE OF DIAGNOSIS
Detect the open or short circuit of the oil temperature sensor.
Judge as NG when outside of the judgment value.
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: 500 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
• 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
None
Judgement Value
Malfunction Criteria
Threshold Value
Output voltage
t 4.716 V
Judgement Value
Malfunction Criteria
Threshold Value
Output voltage
< 4.716 V
GD(H4SO)-77
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
AR:DTC P0222 THROTTLE/PEDAL POSITION SENSOR/SWITCH “B” CIRCUIT
LOW
1. OUTLINE OF DIAGNOSIS
Detect the open or short circuit of throttle position sensor 2.
Judge as NG if out of specification.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITION
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
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: 24 ms
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
• 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: 24 ms
(1)
Throttle position sensor 1 signal
(3)
Throttle position sensor
(4)
Engine control module (ECM)
(2)
Throttle position sensor 2 signal
Secondary Parameters
Enable Conditions
Ignition switch
ON
Battery voltage
t 6 V
Judgement Value
Malfunction Criteria
Threshold Value
Sensor 2 input voltage
d 0.926256 V
Judgement Value
Malfunction Criteria
Threshold Value
Sensor 2 input voltage
> 0.926256 V
EN-01859
(1)
(2)
(3)
(4)
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