Subaru Legacy IV (2008 year). Manual - part 212

GD(H4SO)-150

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

Details of Judgement Value

Details of Judgement time (The actual opening angle 

d target opening angle is always 1000 milliseconds)

Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.

(1)

Difference between target opening 
angle and actual opening angle (°)

(2)

Target throttle opening angle (°)

(3)

NG area

(1)

Judgement time (milliseconds)

(2)

Throttle position sensor 1 open-
ing angle

(3)

NG area

EN-03129

30

20

10

0

(25.0)

(12.0)

(5.0)
(3.5)

0

5 (6.15)

10

(9.65)

(14.65)

15

20

25 (26.65)

30

(1)

(3)

(2)

EN-01865

0

5 (5.5)

10

(9.0)

(13.0) 15

20

25

30

(2)

0

1000

(250)

(22.0)

(300)

(400)

500

(3)

(1)

GD(H4SO)-151

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

CD: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(H4SO)-152

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

CE:DTC P0851 PARK/NEUTRAL SWITCH INPUT CIRCUIT LOW (AT MODEL)

1. OUTLINE OF DIAGNOSIS

Judge the open or short circuit of the neutral SW.
Judge as NG when the ECM neutral terminal input differs from the reception data from TCM.

2. ENABLE CONDITION

3. GENERAL DRIVING CYCLE

Perform the diagnosis continuously in 2 seconds after starting the engine.

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: 100 time(s)
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

Battery voltage

t 10.9 V

Starter relay

OFF

Judgement Value

Malfunction Criteria

Threshold Value

Neutral switch signal in ECM when “P”/
“N” range in TCM are “OFF” and when 
the other switches are “ON”

LOW (ON)

Judgement Value

Malfunction Criteria

Threshold Value

Neutral switch signal in ECM when “P”/
“N” range in TCM are “OFF” and when 
the other switches are “ON”

HIGH (OFF)

GD(H4SO)-153

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

CF:DTC P0851 NEUTRAL SWITCH INPUT CIRCUIT LOW (MT MODEL)

1. OUTLINE OF DIAGNOSIS

Detect the open or short circuit of neutral SW.
Judge as NG when there is no change in the neutral SW even if the driving shift was applied. (There is neutral
SW ON/OFF inversion from the vehicle speed and engine speed.)

2. ENABLE CONDITION

3. GENERAL DRIVING CYCLE

Perform the diagnosis continuously in 2 seconds after starting the engine.

4. DIAGNOSTIC METHOD

• Abnormality Judgement

Judge NG when the malfunction criteria below are completed determined times or more after the neutral SW
change.

Time Needed for Diagnosis: 3 time(s)
Malfunction Indicator Light Illumination:  Illuminates when malfunction occurs in 2 continuous driving cy-
cles.

• Normality Judgement

Judge as OK and clear NG when there is change in the neutral SW.

Time Needed for Diagnosis: Less than 1 second

Secondary Parameters

Enable Conditions

Battery voltage

t 10.9 V

Starter relay

OFF

Judgement Value

Malfunction Criteria

Threshold Value

Neutral switch signal (while changing 
from a to b below)

LOW (ON) continues.

Driving condition change

From a) to b)

a) Engine speed 600 rpm — 900 rpm & 
Vehicle speed = 0 km/h (0 MPH)

b) Engine speed 1600 rpm — 900 rpm & 
Vehicle speed 

t 0 km/h (0 MPH)

Judgement Value

Malfunction Criteria

Threshold Value

Neutral switch signal (while changing 
from a to b below)

Changes to HIGH 
(OFF).

Driving condition change

From a) to b)

a) Engine speed 600 rpm — 900 rpm & 
Vehicle speed = 0 km/h (0 MPH)

b) Engine speed 1600 rpm — 900 rpm & 
Vehicle speed 

t 0 km/h (0 MPH)