Subaru Legacy IV (2008 year). 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

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

Map2

Throttle position sensor 1
opening angle (°) = d

d d < 5.5

5.5

d d < 9

d d < 13

d d < 22

d d

Judgement time (milliseconds)

1000

400

300

250

Map 3

Voltage to drive circuit (V)

Judgement time (milliseconds)

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

(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

: — 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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