Subaru Legacy IV (2008 year). Service 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 )
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