Subaru Legacy IV (2008 year). 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)