Subaru Legacy IV (2008 year). Manual - part 317

 

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Subaru Legacy IV (2008 year). Manual - part 317

 

 

EN(H4DOTC)(diag)-89

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

ENGINE (DIAGNOSTICS)

20.Diagnostic Procedure with Diagnostic Trouble Code (DTC)

A: DTC P0011 INTAKE CAMSHAFT POSITION - TIMING OVER-ADVANCED OR 

SYSTEM PERFORMANCE (BANK 1)

DTC DETECTING CONDITION:
• Two consecutive driving cycles with fault
• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-10, DTC P0011 INTAKE CAMSHAFT POSITION -
TIMING OVER-ADVANCED OR SYSTEM PERFORMANCE (BANK 1), Diagnostic Trouble Code (DTC) De-
tecting Criteria.>
TROUBLE SYMPTOM:
• Engine stalls.
• Improper idling

CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode <Ref. to EN(H4DOTC)(diag)-
52, OPERATION, Clear Memory Mode.>, and Inspection Mode <Ref. to EN(H4DOTC)(diag)-43, PRO-
CEDURE, Inspection Mode.>.

Step

Check

Yes

No

1

CHECK CURRENT DATA.
1) Start the engine and let it idle.
2) Measure the AVCS system operating angle 
using the Subaru Select Monitor or general 
scan tool.

NOTE:
• Subaru Select Monitor
For detailed operation procedure, refer to
“READ CURRENT DATA FOR ENGINE”. <Ref.
to EN(H4DOTC)(diag)-34, Subaru Select Moni-
tor.>
• General scan tool
For detailed operation procedures, refer to the
general scan tool operation manual.

Is the AVCS system operating 
angle approx. 0°?

Go to step 2.

Check the follow-
ing item and repair 
or replace if neces-
sary.
• Oil pipe (clog)
• Oil flow control 
solenoid valve 
(clogged or dirty oil 
passages, spring 
settings)
• Intake camshaft 
(dirt, damage of 
camshaft)

2

CHECK CURRENT DATA.
1) Drive with acceleration and deceleration at 
80 km/h (50 MPH) or less.

NOTE:
Drive to an extent that the duty output of oil flow
control solenoid valve increases.
2) Measure the AVCS system operating angle 
and oil flow control solenoid valve duty output 
using Subaru Select Monitor or general scan 
tool.

NOTE:
• Subaru Select Monitor
For detailed operation procedure, refer to
“READ CURRENT DATA FOR ENGINE”. <Ref.
to EN(H4DOTC)(diag)-34, Subaru Select Moni-
tor.>
• General scan tool
For detailed operation procedures, refer to the
general scan tool operation manual.

When the oil flow control sole-
noid valve duty output exceeds 
10%, is the AVCS system oper-
ating angle approx. 0°?

Check the follow-
ing item and repair 
or replace if neces-
sary.
• Oil pipe (clog)
• Oil flow control 
solenoid valve 
(clogged or dirty oil 
passages, spring 
settings)
• Intake camshaft 
(dirt, damage of 
camshaft)

Perform the follow-
ing procedures, 
and clean the oil 
routing.
Replace the 
engine oil and idle 
the engine for 5 
minutes, and then 
replace the oil filter 
and engine oil. 
<Ref. to 
LU(H4SO)-10, 
REPLACEMENT, 
Engine Oil.> <Ref. 
to LU(H4SO)-23, 
Engine Oil Filter.>

EN(H4DOTC)(diag)-90

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

ENGINE (DIAGNOSTICS)

B: DTC P0016 CRANKSHAFT POSITION - CAMSHAFT POSITION CORRELATION 

(BANK1)

DTC DETECTING CONDITION:
• Two consecutive driving cycles with fault
• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-12, DTC P0016 CRANKSHAFT POSITION - CAM-
SHAFT POSITION CORRELATION (BANK1), Diagnostic Trouble Code (DTC) Detecting Criteria.>
TROUBLE SYMPTOM:
• Engine stalls.
• Improper idling

CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode <Ref. to EN(H4DOTC)(diag)-
52, OPERATION, Clear Memory Mode.>, and Inspection Mode <Ref. to EN(H4DOTC)(diag)-43, PRO-
CEDURE, Inspection Mode.>.

Step

Check

Yes

No

1

CHECK CURRENT DATA.
1) Start the engine and let it idle.
2) Measure the AVCS system operating angle 
and oil flow control solenoid valve duty output 
using Subaru Select Monitor or general scan 
tool.

NOTE:
• Subaru Select Monitor
For detailed operation procedure, refer to
“READ CURRENT DATA FOR ENGINE”. <Ref.
to EN(H4DOTC)(diag)-34, Subaru Select Moni-
tor.>
• General scan tool
For detailed operation procedures, refer to the
general scan tool operation manual.

Is the AVCS system operating 
angle approx. 0°, and oil flow 
control solenoid valve duty out-
put approx. 10%?

Perform the follow-
ing procedures, 
and clean the oil 
routing.
Replace the 
engine oil and idle 
the engine for 5 
minutes, and then 
replace the oil filter 
and engine oil. 
<Ref. to 
LU(H4SO)-10, 
REPLACEMENT, 
Engine Oil.> <Ref. 
to LU(H4SO)-23, 
Engine Oil Filter.>

Check the follow-
ing item and repair 
or replace if neces-
sary.
• Oil pipe (clog)
• Oil flow control 
solenoid valve 
(clogged or dirty oil 
passages, spring 
settings)
• Intake camshaft 
(dirt, damage of 
camshaft)
• Timing belt 
(matching of timing 
mark)

EN(H4DOTC)(diag)-91

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

ENGINE (DIAGNOSTICS)

C: DTC P0018 CRANKSHAFT POSITION - CAMSHAFT POSITION CORRELATION 

(BANK2)

DTC DETECTING CONDITION:
• Two consecutive driving cycles with fault
• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-13, DTC P0018 CRANKSHAFT POSITION - CAM-
SHAFT POSITION CORRELATION (BANK2), Diagnostic Trouble Code (DTC) Detecting Criteria.>
TROUBLE SYMPTOM:
• Engine stalls.
• Improper idling

CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode <Ref. to EN(H4DOTC)(diag)-
52, OPERATION, Clear Memory Mode.>, and Inspection Mode <Ref. to EN(H4DOTC)(diag)-43, PRO-
CEDURE, Inspection Mode.>.

Step

Check

Yes

No

1

CHECK CURRENT DATA.
1) Start the engine and let it idle.
2) Measure the AVCS system operating angle 
and oil flow control solenoid valve duty output 
using Subaru Select Monitor or general scan 
tool.

NOTE:
• Subaru Select Monitor
For detailed operation procedure, refer to
“READ CURRENT DATA FOR ENGINE”. <Ref.
to EN(H4DOTC)(diag)-34, Subaru Select Moni-
tor.>
• General scan tool
For detailed operation procedures, refer to the
general scan tool operation manual.

Is the AVCS system operating 
angle approx. 0°, and oil flow 
control solenoid valve duty out-
put approx. 10%?

Perform the follow-
ing procedures, 
and clean the oil 
routing.
Replace the 
engine oil and idle 
the engine for 5 
minutes, and then 
replace the oil filter 
and engine oil. 
<Ref. to 
LU(H4SO)-10, 
REPLACEMENT, 
Engine Oil.> <Ref. 
to LU(H4SO)-23, 
Engine Oil Filter.>

Check the follow-
ing item and repair 
or replace if neces-
sary.
• Oil pipe (clog)
• Oil flow control 
solenoid valve 
(clogged or dirty oil 
passages, spring 
settings)
• Intake camshaft 
(dirt, damage of 
camshaft)
• Timing belt 
(matching of timing 
mark)

EN(H4DOTC)(diag)-92

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

ENGINE (DIAGNOSTICS)

D: DTC P0021 INTAKE CAMSHAFT POSITION - TIMING OVER-ADVANCED OR 

SYSTEM PERFORMANCE (BANK 2)

DTC DETECTING CONDITION:
• Two consecutive driving cycles with fault
• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-13, DTC P0021 INTAKE CAMSHAFT POSITION -
TIMING OVER-ADVANCED OR SYSTEM PERFORMANCE (BANK 2), Diagnostic Trouble Code (DTC) De-
tecting Criteria.>
TROUBLE SYMPTOM:
• Engine stalls.
• Improper idling

CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode <Ref. to EN(H4DOTC)(diag)-
52, OPERATION, Clear Memory Mode.>, and Inspection Mode <Ref. to EN(H4DOTC)(diag)-43, PRO-
CEDURE, Inspection Mode.>.

Step

Check

Yes

No

1

CHECK CURRENT DATA.
1) Start the engine and let it idle.
2) Measure the AVCS system operating angle 
using the Subaru Select Monitor or general 
scan tool.

NOTE:
• Subaru Select Monitor
For detailed operation procedure, refer to
“READ CURRENT DATA FOR ENGINE”. <Ref.
to EN(H4DOTC)(diag)-34, Subaru Select Moni-
tor.>
• General scan tool
For detailed operation procedures, refer to the
general scan tool operation manual.

Is the AVCS system operating 
angle approx. 0°?

Go to step 2.

Check the follow-
ing item and repair 
or replace if neces-
sary.
• Oil pipe (clog)
• Oil flow control 
solenoid valve 
(clogged or dirty oil 
passages, spring 
settings)
• Intake camshaft 
(dirt, damage of 
camshaft)

2

CHECK CURRENT DATA.
1) Drive with acceleration and deceleration at 
80 km/h (50 MPH) or less.

NOTE:
Drive to an extent that the duty output of oil flow
control solenoid valve increases.
2) Measure the AVCS system operating angle 
and oil flow control solenoid valve duty output 
using Subaru Select Monitor or general scan 
tool.

NOTE:
• Subaru Select Monitor
For detailed operation procedure, refer to
“READ CURRENT DATA FOR ENGINE”. <Ref.
to EN(H4DOTC)(diag)-34, Subaru Select Moni-
tor.>
• General scan tool
For detailed operation procedures, refer to the
general scan tool operation manual.

When the oil flow control sole-
noid valve duty output exceeds 
10%, is the AVCS system oper-
ating angle approx. 0°?

Check the follow-
ing item and repair 
or replace if neces-
sary.
• Oil pipe (clog)
• Oil flow control 
solenoid valve 
(clogged or dirty oil 
passages, spring 
settings)
• Intake camshaft 
(dirt, damage of 
camshaft)

Perform the follow-
ing procedures, 
and clean the oil 
routing.
Replace the 
engine oil and idle 
the engine for 5 
minutes, and then 
replace the oil filter 
and engine oil. 
<Ref. to 
LU(H4SO)-10, 
REPLACEMENT, 
Engine Oil.> <Ref. 
to LU(H4SO)-23, 
Engine Oil Filter.>

 

 

 

 

 

 

 

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