Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual — part 218

EN(H4DOTC)(diag)-96

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:

• Detected when two consecutive driving cycles with fault occur.

• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-13, 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 servicing or replacing faulty parts, perform Clear Memory Mode <Ref. to EN(H4DOTC)(diag)-63,

OPERATION, Clear Memory Mode.>, and Inspection Mode <Ref. to EN(H4DOTC)(diag)-49, PROCE-

DURE, Inspection Mode.>.

Step

Check

Yes

No

1

CHECK CURRENT DATA.
1) Start the engine and let it idle.
2) Read the value of «VVT Adv. Ang. Amount
R» using the Subaru Select Monitor.
NOTE:

For detailed operation procedures, refer to
“READ CURRENT DATA FOR ENGINE”. <Ref.
to EN(H4DOTC)(diag)-40, Subaru Select Moni-
tor.>

Is the value of «VVT Adv. Ang.
Amount R» approx. 0 deg?

Go to step

2.

Check the follow-
ing item and repair
or replace if neces-
sary.
• Oil pipe (clog)
• Oil flow control
solenoid valve
(clog or dirt of oil
routing, setting of
spring)
• 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) Read the values of «OCV Duty R» and
«VVT Adv. Ang. Amount R» using the Subaru
Select Monitor.
NOTE:

For detailed operation procedures, refer to
“READ CURRENT DATA FOR ENGINE”. <Ref.
to EN(H4DOTC)(diag)-40, Subaru Select Moni-
tor.>

When the value of «OCV Duty
R» increases more than 10%,
is the value of «VVT Adv. Ang.
Amount R» approx. 0 deg?

Check the follow-
ing item and repair
or replace if neces-
sary.
• Oil pipe (clog)
• Oil flow control
solenoid valve
(clog or dirt of oil
routing, setting of
spring)
• 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(STI)-
11, REPLACE-
MENT, Engine
Oil.> <Ref. to
LU(STI)-31,
Engine Oil Filter.>

EN(H4DOTC)(diag)-97

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

ENGINE (DIAGNOSTICS)

B: DTC P0014 EXHAUST AVCS SYSTEM 1 (RANGE/PERFORMANCE)

DTC DETECTING CONDITION:

• Detected when two consecutive driving cycles with fault occur.

• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-15, DTC P0014 EXHAUST AVCS SYSTEM 1

(RANGE/PERFORMANCE), Diagnostic Trouble Code (DTC) Detecting Criteria.>

TROUBLE SYMPTOM:

• Engine stalls.

• Improper idling
CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode <Ref. to EN(H4DOTC)(diag)-63,

OPERATION, Clear Memory Mode.>, and Inspection Mode <Ref. to EN(H4DOTC)(diag)-49, PROCE-

DURE, Inspection Mode.>.

Step

Check

Yes

No

1

CHECK CURRENT DATA.
1) Start the engine and let it idle.
2) Read the value of «Exh. VVT Retard Ang.
R» using the Subaru Select Monitor.
NOTE:

For detailed operation procedures, refer to
“READ CURRENT DATA FOR ENGINE”. <Ref.
to EN(H4DOTC)(diag)-40, Subaru Select Moni-
tor.>

Is the value of «Exh. VVT
Retard Ang. R» approx. 0 deg?

Go to step

2.

Check the follow-
ing item and repair
or replace if neces-
sary.
• Oil pipe (clog)
• Oil flow control
solenoid valve
(clog or dirt of oil
routing, setting of
spring)
• Exhaust cam-
shaft (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) Read the values of «Exh. OCV Duty R» and
«Exh. VVT Retard Ang. R» using the Subaru
Select Monitor.
NOTE:

For detailed operation procedures, refer to
“READ CURRENT DATA FOR ENGINE”. <Ref.
to EN(H4DOTC)(diag)-40, Subaru Select Moni-
tor.>

When the value of «Exh. OCV
Duty R» increases more than
10%, is the value of «Exh. VVT
Retard Ang. R» approx. 0 deg?

Check the follow-
ing item and repair
or replace if neces-
sary.
• Oil pipe (clog)
• Oil flow control
solenoid valve
(clog or dirt of oil
routing, setting of
spring)
• Exhaust cam-
shaft (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(STI)-
11, REPLACE-
MENT, Engine
Oil.> <Ref. to
LU(STI)-31,
Engine Oil Filter.>

EN(H4DOTC)(diag)-98

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

ENGINE (DIAGNOSTICS)

C: DTC P0016 CRANKSHAFT POSITION - CAMSHAFT POSITION CORRELA-

TION (BANK1)

DTC DETECTING CONDITION:

• Detected when two consecutive driving cycles with fault occur.

• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-17, DTC P0016 CRANKSHAFT POSITION - CAM-

SHAFT POSITION CORRELATION (BANK1), Diagnostic Trouble Code (DTC) Detecting Criteria.>

TROUBLE SYMPTOM:

• Engine stalls.

• Improper idling
CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode <Ref. to EN(H4DOTC)(diag)-63,

OPERATION, Clear Memory Mode.>, and Inspection Mode <Ref. to EN(H4DOTC)(diag)-49, PROCE-

DURE, Inspection Mode.>.

Step

Check

Yes

No

1

CHECK CURRENT DATA.
1) Start the engine and let it idle.
2) Read the values of «VVT Adv. Ang. Amount
R» and «OCV Duty R» using the Subaru Select
Monitor.
NOTE:

For detailed operation procedures, refer to
“READ CURRENT DATA FOR ENGINE”. <Ref.
to EN(H4DOTC)(diag)-40, Subaru Select Moni-
tor.>

Is the value of «VVT Adv. Ang.
Amount R» approx. 0 deg, and
the value of «OCV Duty R»
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(STI)-
11, REPLACE-
MENT, Engine
Oil.> <Ref. to
LU(STI)-31,
Engine Oil Filter.>

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

EN(H4DOTC)(diag)-99

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

ENGINE (DIAGNOSTICS)

D: DTC P0017 CRANK AND CAM TIMING B SYSTEM FAILURE (BANK 1)

DTC DETECTING CONDITION:

• Detected when two consecutive driving cycles with fault occur.

• GENERAL DESCRIPTION <Ref. to GD(H4DOTC)-19, DTC P0017 CRANK AND CAM TIMING B SYS-

TEM FAILURE (BANK 1), Diagnostic Trouble Code (DTC) Detecting Criteria.>

TROUBLE SYMPTOM:

• Engine stalls.

• Improper idling
CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode <Ref. to EN(H4DOTC)(diag)-63,

OPERATION, Clear Memory Mode.>, and Inspection Mode <Ref. to EN(H4DOTC)(diag)-49, PROCE-

DURE, Inspection Mode.>.

Step

Check

Yes

No

1

CHECK CURRENT DATA.
1) Start the engine and let it idle.
2) Read the values of «Exh. VVT Retard Ang.
R» and «Exh. OCV Duty R» using the Subaru
Select Monitor.
NOTE:

For detailed operation procedures, refer to
“READ CURRENT DATA FOR ENGINE”. <Ref.
to EN(H4DOTC)(diag)-40, Subaru Select Moni-
tor.>

Is the value of «Exh. VVT
Retard Ang. R» approx. 0 deg,
and the value of «Exh. OCV
Duty R» 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(STI)-
11, REPLACE-
MENT, Engine
Oil.> <Ref. to
LU(STI)-31,
Engine Oil Filter.>

Check the follow-
ing item and repair
or replace if neces-
sary.
• Oil pipe (clog)
• Oil flow control
solenoid valve
(clog or dirt of oil
routing, setting of
spring)
• Exhaust cam-
shaft (dirt, damage
of camshaft)
• Timing belt
(matching of timing
mark)