Subaru Legacy IV (2008 year). Manual - part 647

GD(H6DO)-208

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

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: 212 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

Judgement Value

Malfunction Criteria

Threshold Value

Signal difference between two sensors

> Value from Map

Map

Throttle position sensor 1 
opening angle (°) = d

0°

d d < 2.125 °

2.125 ° 

d d < 4.25 °

4.25 ° 

d d < 9 °

9 ° 

d d < 31.625 °

31.625 ° 

d d

Sensor output difference (°)

4.5 °

5.5 °

7.625 °

9.75 °

11.75 °

Judgement Value

Malfunction Criteria

Threshold Value

Signal difference between two sensors

d Value from Map

GD(H6DO)-209

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

ES:DTC P2138 THROTTLE/PEDAL POSITION SENSOR/SWITCH “D”/“E” 

VOLTAGE CORRELATION

1. OUTLINE OF DIAGNOSIS

Judge as NG when the signal level of throttle position sensor 1 is different from the throttle position sensor 2.

2. COMPONENT DESCRIPTION

3. ENABLE CONDITION

4. GENERAL DRIVING CYCLE

Always perform the diagnosis continuously.

(1)

Engine control module (ECM)

(3)

Accelerator pedal position sensor 
2 signal

(4)

Accelerator pedal position sensor

(2)

Accelerator pedal position sensor 
1 signal

Secondary Parameters

Enable Conditions

Ignition switch

ON

Battery voltage

t 6 V

EN-01861

(2)

(3)

(4)

(1)

GD(H6DO)-210

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

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: 116 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: 116 ms

Judgement Value

Malfunction Criteria

Threshold Value

Signal difference between two sensors

> Value from Map

Map

Throttle position sensor 1 
opening angle (°) = d

0°

d d < 0.6 °

0.6 ° 

d d < 1.2 °

1.2 ° 

d d < 2 °

2 ° 

d d < 4 °

4 ° 

d d

Sensor output difference (°)

1.465 °

1.597 °

1.663 °

2.455 °

3.116 °

Judgement Value

Malfunction Criteria

Threshold Value

Signal difference between two sensors

d Value from Map

GD(H6DO)-211

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

ET:DTC P2227 BAROMETRIC PRESSURE CIRCUIT RANGE/PERFORMANCE

1. OUTLINE OF DIAGNOSIS

Detect the malfunction of barometric pressure sensor output property.
Judge as NG when the barometric pressure sensor output is largely different from the intake manifold pres-
sure at engine start.

2. COMPONENT DESCRIPTION

The barometric pressure sensor is built into the ECM.

3. ENABLE CONDITION

4. GENERAL DRIVING CYCLE

Perform the diagnosis once at ignition switch ON.

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: 328 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: 262 ms

Secondary Parameters

Enable Conditions

Engine speed

< 300 rpm

Vehicle speed

< 1 km/h (0.6 MPH)

Judgement Value

Malfunction criteria

Threshold value

|Barometric pressure – Intake manifold 
pressure|

t 26.7 kPa (200 mmHg, 
7.9 inHg)

|Intake manifold pressure at engine start 
– Intake manifold pressure|

< 1.3 kPa (9.99 mmHg, 
0.4 inHg)

Judgement Value

Malfunction criteria

Threshold value

|Barometric pressure – Intake manifold 
pressure|

< 26.7 kPa (200 mmHg, 
7.9 inHg)