Subaru Legacy IV (2008 year). Manual - part 620

GD(H6DO)-100

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

4. GENERAL DRIVING CYCLE

Perform the diagnosis continuously under 3000 rpm engine speed.

5. DIAGNOSTIC METHOD

• Abnormality Judgement

Judge as NG when the following conditions are established.

Time Needed for Diagnosis: 10 engine revs.
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

Judgement Value

Malfunction Criteria

Threshold Value

Cylinder number identification

Completed

Amount of crank sensor signal during 1 rev. Not = 30

Judgement Value

Malfunction Criteria

Threshold Value

Cylinder number identification

Completed

Amount of crank sensor signal during 1 rev. = 30

GD(H6DO)-101

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

BZ:DTC P0340 CAMSHAFT POSITION SENSOR “A” CIRCUIT (BANK 1 OR SINGLE 

SENSOR)

1. OUTLINE OF DIAGNOSIS

Detect the open or short circuit of the camshaft position sensor.
Judge as NG when the number of camshaft signals remains abnormal.

2. COMPONENT DESCRIPTION

3. ENABLE CONDITION

(A) Camshaft signal (RH)

(B) Camshaft signal (LH)

(C) Crankshaft signal

(1)

Throttle

(3)

Detecting point

(4)

Camshaft one revolution (engine 
two revolutions)

(2)

Camshaft plate

 

 

Secondary Parameters

Enable Conditions

Battery voltage

t 8 V

(A)

(C)

#6BTDC10 CA

#3BTDC10 CA

#2BTDC10 CA

#5BTDC10 CA

#4BTDC10 CA

10 CA

30 CA

30 CA

#1BTDC10 CA

#1BTDC10 CA

EN-03092

(B)

Number of camshaft signal - 3 is normal at two engine revolution in a range of 0 CA - 0 CA.

(1)

(2)

(3)

(4)

EN-02190

GD(H6DO)-102

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

4. GENERAL DRIVING CYCLE

Always perform the diagnosis continuously.

5. DIAGNOSTIC METHOD

• Abnormality Judgement 1

Judge as NG when the condition where the number of camshaft position sensor signals are less than 3 times
during 2 engine speed. continues.

Time Needed for Diagnosis: Two engine revolutions × 4 time(s)
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.

• Normality Judgement 1

Judge as OK and clear the NG when the malfunction criteria below are met.

Time Needed for Diagnosis: Two engine revolutions

• Abnormality Judgement 2

If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

Time Needed for Diagnosis: 3000 ms

• Normality Judgement 2

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

CA:DTC P0345 CAMSHAFT POSITION SENSOR “A” CIRCUIT (BANK 2)

1. OUTLINE OF DIAGNOSIS

NOTE:
For the detection standard, refer to DTC P0340. <Ref. to GD(H6DO)-101, DTC P0340 CAMSHAFT POSI-
TION SENSOR “A” CIRCUIT (BANK 1 OR SINGLE SENSOR), Diagnostic Trouble Code (DTC) Detecting
Criteria.>

Judgement Value

Malfunction Criteria

Threshold Value

Amount of camshaft sensor signal during 
2 revs.

< 3.000 time(s)

Judgement Value

Malfunction Criteria

Threshold Value

Camshaft position sensor signal

t 3.000 time(s)

Judgement Value

Malfunction Criteria

Threshold Value

Starter

ON

Camshaft position sensor signal

No input

Judgement Value

Malfunction Criteria

Threshold Value

Camshaft position sensor signal

Input exists

GD(H6DO)-103

Diagnostic Trouble Code (DTC) Detecting Criteria

GENERAL DESCRIPTION

CB:DTC P0400 EXHAUST GAS RECIRCULATION FLOW

1. OUTLINE OF DIAGNOSIS

Detect EGR system malfunction.
Intake manifold pressure (negative pressure) is constant because the throttle valve is fully closed during de-
celeration fuel cut. At this time, when the EGR valve is opened/closed, the intake manifold pressure will
change. EGR System OK/NG is judged by the range of this change.

2. COMPONENT DESCRIPTION

(1)

ECM

(4)

CPU

(6)

Main relay

(2)

Detecting circuit

(5)

EGR valve

(7)

Battery power supply

(3)

Switching 

circuit

  

  

EN-02192

( 1 )

( 2 )

( 3 )

( 4 )

( 5 )

( 6 )

( 7 )