Intake SUBARU TRIBECA 2009 1.G Service Owner's Guide

EN(H6DO)(diag)-43
Drive Cycle
ENGINE (DIAGNOSTICS)
4. DRIVE CYCLE C — DRIVE THE VEHICLE WITH FOLLOWING DRIVE PATTERNS
(A) Idle the engine for more than 10
seconds.
(D) Decelerate the vehicle to 64 km/h
(40 MPH) with throttle fully closed.
(G) Stop the vehicle with throttle fully
closed.
(B) Accelerate the vehicle to 97 km/h
(60 MPH) within 20 seconds.
(E) Drive the vehicle at 64 km/h (40
MPH) for 20 seconds.
(H) Vehicle speed km/h (MPH)
(I) Sec.
(C) Drive the vehicle at 97 km/h (60
MPH) for 20 seconds.
(F) Accelerate the vehicle to 97 km/h
(60 MPH) within 10 seconds.

DTC Item On condition
P0026 Intake Valve Control Solenoid Circuit Range/Performance (Bank 1) —
P0028 Intake Valve Control Solenoid Circuit Range/Performance (Bank 2) —
*P0030 HO2S Heater Control Circuit (Bank 1 Sensor 1) —
*P0050 HO2S Heater Control Circuit (Bank 2 Sensor 1) —
*P0068 MAP/MAF - Throttle Position Correlation —
P0076 Intake Valve Control Circuit Low (Bank 1) —
P0082 Intake Valve Control Circuit Low (Bank 2) —
*P0101 Mass or Volume Air Flow Circuit Range/Performance —
P0134 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1) —
*P0139 O2 Sensor Circuit Slow Response (Bank 1 Sensor 2) —
P0154 O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 1) —
*P0159 O2 Sensor Circuit Slow Response (Bank 2 Sensor 2) —
*P0171 System Too Lean (Bank 1) Complete diagnosis for drive cycle A or B
*P0172 System Too Rich (Bank 1) Complete diagnosis for drive cycle A or B
*P0174 System Too Lean (Bank 2) Complete diagnosis for drive cycle A or B
*P0175 System Too Rich (Bank 2) Complete diagnosis for drive cycle A or B
*P0301 Cylinder 1 Misfire Detected Complete diagnosis for drive cycle A or B
*P0302 Cylinder 2 Misfire Detected Complete diagnosis for drive cycle A or B
*P0303 Cylinder 3 Misfire Detected Complete diagnosis for drive cycle A or B
*P0304 Cylinder 4 Misfire Detected Complete diagnosis for drive cycle A or B
*P0305 Cylinder 5 Misfire Detected Complete diagnosis for drive cycle A or B
*P0306 Cylinder 6 Misfire Detected Complete diagnosis for drive cycle A or B
P2103 Throttle Actuator Control Motor Circuit High Complete diagnosis for drive cycle A or B
EN-00842
(C)
(H)
(I)
(60)97
64(40)(B)
(A)
(F)(D)
(E)
150100500
(G)

EN(H6DO)(diag)-44
Drive Cycle
ENGINE (DIAGNOSTICS)
5. DRIVE CYCLE D
Drift Diagnosis
1) Check that the engine coolant temperature at engine start is 30°C (86°F) or less.
2) Check that the battery voltage is more than 10.9 V and that more than 9.6 2 (2.5 US gal, 2.1 Imp gal) of
fuel remains.
3) Start the engine, and check that the engine coolant temperature increases over 10°C (50°F), and reaches
75°C (167°F) or more, when the engine is warmed up.
4) After the engine has reached the state of procedure 3), idle the engine for more than 120 seconds.
Stuck Diagnosis
1) Check that the battery voltage is over 10.9 V.
2) Perform the clear memory mode. <Ref. to EN(H6DO)(diag)-45, Clear Memory Mode.>
3) Drive for approximately 50 2 (13.2 US gal, 11 Imp gal) of fuel.
NOTE:
•It is acceptable to drive the vehicle intermittently.
•Do not disconnect the battery terminals while diagnosing. (Data will be cleared by disconnecting the bat-
tery terminals.)
6. DRIVE CYCLE E
1) Check that the battery voltage is over 10.9 V.
2) Perform the clear memory mode. <Ref. to EN(H6DO)(diag)-45, Clear Memory Mode.>
3) Drive for approximately 30 2 (7.9 US gal, 6.6 Imp gal) of fuel.
NOTE:
•It is acceptable to drive the vehicle intermittently.
•Do not disconnect the battery terminals while diagnosing. (Data will be cleared by disconnecting the bat-
tery terminals.)
7. DRIVE CYCLE F
1) Check that the engine coolant temperature at engine start is 30°C (86°F) or less.
2) Start the engine, and warm it up until engine coolant temperature increases over 95°C (203°F).
3) After the engine has reached the state of procedure 2), idle the engine for more than 10 minutes.
NOTE:
Do not disconnect the battery terminals while diagnosing. (Data will be cleared by disconnecting the battery
terminals.)
DTC Item On condition
P0181 Fuel Temperature Sensor “A” Circuit Range/Performance —
DTC Item On condition
P0461 Fuel Level Sensor Circuit Range/Performance —
DTC Item On condition
P0111 Intake Air Temperature Circuit Range/Performance —

EN(H6DO)(diag)-69
List of Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
17.List of Diagnostic Trouble Code (DTC)
A: LIST
DTC Item Reference
P0011 Intake Camshaft Position Timing -
Over-Advanced (Bank 1)
<Ref. to EN(H6DO)(diag)-77, DTC P0011 INTAKE CAMSHAFT POSITION
TIMING - OVER-ADVANCED (BANK 1), Diagnostic Procedure with Diagnos-
tic Trouble Code (DTC).>
P0016 Crankshaft Position - Camshaft Posi-
tion Correlation (Bank 1)
<Ref. to EN(H6DO)(diag)-78, DTC P0016 CRANKSHAFT POSITION - CAM-
SHAFT POSITION CORRELATION (BANK 1), Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P0018 Crankshaft Position - Camshaft Posi-
tion Correlation (Bank 2)
<Ref. to EN(H6DO)(diag)-79, DTC P0018 CRANKSHAFT POSITION - CAM-
SHAFT POSITION CORRELATION (BANK 2), Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P0021 Intake Camshaft Position Timing -
Over-Advanced (Bank 2)
<Ref. to EN(H6DO)(diag)-80, DTC P0021 INTAKE CAMSHAFT POSITION
TIMING - OVER-ADVANCED (BANK 2), Diagnostic Procedure with Diagnos-
tic Trouble Code (DTC).>
P0026 Intake Valve Control Solenoid Circuit
Range/Performance (Bank 1)
<Ref. to EN(H6DO)(diag)-81, DTC P0026 INTAKE VALVE CONTROL SOLE-
NOID CIRCUIT RANGE/PERFORMANCE (BANK 1), Diagnostic Procedure
with Diagnostic Trouble Code (DTC).>
P0028 Intake Valve Control Solenoid Circuit
Range/Performance (Bank 2)
<Ref. to EN(H6DO)(diag)-83, DTC P0028 INTAKE VALVE CONTROL SOLE-
NOID CIRCUIT RANGE/PERFORMANCE (BANK 2), Diagnostic Procedure
with Diagnostic Trouble Code (DTC).>
P0030 HO2S Heater Control Circuit (Bank 1
Sensor 1)
<Ref. to EN(H6DO)(diag)-85, DTC P0030 HO2S HEATER CONTROL CIR-
CUIT (BANK 1 SENSOR 1), Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P0031 HO2S Heater Control Circuit Low
(Bank 1 Sensor 1)
<Ref. to EN(H6DO)(diag)-88, DTC P0031 HO2S HEATER CONTROL CIR-
CUIT LOW (BANK 1 SENSOR 1), Diagnostic Procedure with Diagnostic
Tr o u b l e C o d e ( D T C ) . >
P0032 HO2S Heater Control Circuit High
(Bank 1 Sensor 1)
<Ref. to EN(H6DO)(diag)-92, DTC P0032 HO2S HEATER CONTROL CIR-
CUIT HIGH (BANK 1 SENSOR 1), Diagnostic Procedure with Diagnostic
Tr o u b l e C o d e ( D T C ) . >
P0037 HO2S Heater Control Circuit Low
(Bank 1 Sensor 2)
<Ref. to EN(H6DO)(diag)-95, DTC P0037 HO2S HEATER CONTROL CIR-
CUIT LOW (BANK 1 SENSOR 2), Diagnostic Procedure with Diagnostic
Tr o u b l e C o d e ( D T C ) . >
P0038 HO2S Heater Control Circuit High
(Bank 1 Sensor 2)
<Ref. to EN(H6DO)(diag)-99, DTC P0038 HO2S HEATER CONTROL CIR-
CUIT HIGH (BANK 1 SENSOR 2), Diagnostic Procedure with Diagnostic
Tr o u b l e C o d e ( D T C ) . >
P0050 HO2S Heater Control Circuit (Bank 2
Sensor 1)
<Ref. to EN(H6DO)(diag)-102, DTC P0050 HO2S HEATER CONTROL CIR-
CUIT (BANK 2 SENSOR 1), Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P0051 HO2S Heater Control Circuit Low
(Bank 2 Sensor 1)
<Ref. to EN(H6DO)(diag)-105, DTC P0051 HO2S HEATER CONTROL CIR-
CUIT LOW (BANK 2 SENSOR 1), Diagnostic Procedure with Diagnostic
Tr o u b l e C o d e ( D T C ) . >
P0052 HO2S Heater Control Circuit High
(Bank 2 Sensor 1)
<Ref. to EN(H6DO)(diag)-109, DTC P0052 HO2S HEATER CONTROL CIR-
CUIT HIGH (BANK 2 SENSOR 1), Diagnostic Procedure with Diagnostic
Tr o u b l e C o d e ( D T C ) . >
P0057 HO2S Heater Control Circuit Low
(Bank 2 Sensor 2)
<Ref. to EN(H6DO)(diag)-112, DTC P0057 HO2S HEATER CONTROL CIR-
CUIT LOW (BANK 2 SENSOR 2), Diagnostic Procedure with Diagnostic
Tr o u b l e C o d e ( D T C ) . >
P0058 HO2S Heater Control Circuit High
(Bank 2 Sensor 2)
<Ref. to EN(H6DO)(diag)-116, DTC P0058 HO2S HEATER CONTROL CIR-
CUIT HIGH (BANK 2 SENSOR 2), Diagnostic Procedure with Diagnostic
Tr o u b l e C o d e ( D T C ) . >
P0068 MAP/MAF - Throttle Position Correla-
tion
<Ref. to EN(H6DO)(diag)-119, DTC P0068 MAP/MAF - THROTTLE POSI-
TION CORRELATION, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
P0076 Intake Valve Control Circuit Low
(Bank 1)
<Ref. to EN(H6DO)(diag)-121, DTC P0076 INTAKE VALVE CONTROL CIR-
CUIT LOW (BANK 1), Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>

EN(H6DO)(diag)-70
List of Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
P0077 Intake Valve Control Circuit High
(Bank 1)
<Ref. to EN(H6DO)(diag)-123, DTC P0077 INTAKE VALVE CONTROL CIR-
CUIT HIGH (BANK 1), Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
P0082 Intake Valve Control Circuit Low
(Bank 2)
<Ref. to EN(H6DO)(diag)-125, DTC P0082 INTAKE VALVE CONTROL CIR-
CUIT LOW (BANK 2), Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
P0083 Intake Valve Control Circuit High
(Bank 2)
<Ref. to EN(H6DO)(diag)-127, DTC P0083 INTAKE VALVE CONTROL CIR-
CUIT HIGH (BANK 2), Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
P0101 Mass or Volume Air Flow Circuit
Range/Performance
<Ref. to EN(H6DO)(diag)-129, DTC P0101 MASS OR VOLUME AIR FLOW
CIRCUIT RANGE/PERFORMANCE, Diagnostic Procedure with Diagnostic
Tr o u b l e C o d e ( D T C ) . >
P0102 Mass or Volume Air Flow Circuit Low
Input
<Ref. to EN(H6DO)(diag)-131, DTC P0102 MASS OR VOLUME AIR FLOW
CIRCUIT LOW INPUT, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
P0103 Mass or Volume Air Flow Circuit High
Input
<Ref. to EN(H6DO)(diag)-134, DTC P0103 MASS OR VOLUME AIR FLOW
CIRCUIT HIGH INPUT, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
P0107 Manifold Absolute Pressure/Baro-
metric Pressure Circuit Low Input
<Ref. to EN(H6DO)(diag)-136, DTC P0107 MANIFOLD ABSOLUTE PRES-
SURE/BAROMETRIC PRESSURE CIRCUIT LOW INPUT, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>
P0108 Manifold Absolute Pressure/Baro-
metric Pressure Circuit High Input
<Ref. to EN(H6DO)(diag)-139, DTC P0108 MANIFOLD ABSOLUTE PRES-
SURE/BAROMETRIC PRESSURE CIRCUIT HIGH INPUT, Diagnostic Pro-
cedure with Diagnostic Trouble Code (DTC).>
P0111 Intake Air Temperature Circuit
Range/Performance
<Ref. to EN(H6DO)(diag)-142, DTC P0111 INTAKE AIR TEMPERATURE
CIRCUIT RANGE/PERFORMANCE, Diagnostic Procedure with Diagnostic
Tr o u b l e C o d e ( D T C ) . >
P0112 Intake Air Temperature Circuit Low
Input
<Ref. to EN(H6DO)(diag)-144, DTC P0112 INTAKE AIR TEMPERATURE
CIRCUIT LOW INPUT, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
P0113 Intake Air Temperature Circuit High
Input
<Ref. to EN(H6DO)(diag)-146, DTC P0113 INTAKE AIR TEMPERATURE
CIRCUIT HIGH INPUT, Diagnostic Procedure with Diagnostic Trouble Code
(DTC).>
P0117 Engine Coolant Temperature Circuit
Low Input
<Ref. to EN(H6DO)(diag)-149, DTC P0117 ENGINE COOLANT TEMPERA-
TURE CIRCUIT LOW INPUT, Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P0118 Engine Coolant Temperature Circuit
High Input
<Ref. to EN(H6DO)(diag)-151, DTC P0118 ENGINE COOLANT TEMPERA-
TURE CIRCUIT HIGH INPUT, Diagnostic Procedure with Diagnostic Trouble
Code (DTC).>
P0122 Throttle/Pedal Position Sensor/
Switch “A” Circuit Low Input
<Ref. to EN(H6DO)(diag)-154, DTC P0122 THROTTLE/PEDAL POSITION
SENSOR/SWITCH “A” CIRCUIT LOW INPUT, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P0123 Throttle/Pedal Position Sensor/
Switch “A” Circuit High Input
<Ref. to EN(H6DO)(diag)-157, DTC P0123 THROTTLE/PEDAL POSITION
SENSOR/SWITCH “A” CIRCUIT HIGH INPUT, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P0125 Insufficient Coolant Temperature For
Closed Loop Fuel Control
<Ref. to EN(H6DO)(diag)-160, DTC P0125 INSUFFICIENT COOLANT
TEMPERATURE FOR CLOSED LOOP FUEL CONTROL, Diagnostic Proce-
dure with Diagnostic Trouble Code (DTC).>
P0126 Insufficient Coolant Temperature for
Stable Operation
<Ref. to EN(H6DO)(diag)-161, DTC P0126 INSUFFICIENT COOLANT
TEMPERATURE FOR STABLE OPERATION, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
P0128 Coolant Thermostat (Coolant Tem-
perature Below Thermostat Regulat-
ing Temperature)
<Ref. to EN(H6DO)(diag)-163, DTC P0128 COOLANT THERMOSTAT
(COOLANT TEMPERATURE BELOW THERMOSTAT REGULATING TEM-
PERATURE), Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
P0131 O2 Sensor Circuit Low Voltage (Bank
1 Sensor 1)
<Ref. to EN(H6DO)(diag)-164, DTC P0131 O2 SENSOR CIRCUIT LOW
VOLTAGE (BANK 1 SENSOR 1), D iagnostic Procedure with Diagnostic Trou-
ble Code (DTC).>
DTC Item Reference

EN(H6DO)(diag)-77
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
18.Diagnostic Procedure with Diagnostic Trouble Code (DTC)
A: DTC P0011 INTAKE CAMSHAFT POSITION TIMING - OVER-ADVANCED
(BANK 1)
DTC DETECTING CONDITION:
•Detected when two consecutive driving cycles with fault occur.
•GENERAL DESCRIPTION <Ref. to GD(H6DO)-9, DTC P0011 INTAKE CAMSHAFT POSITION TIMING
- OVER-ADVANCED (BANK 1), Diagnostic Trouble Code (DTC) Detecting Criteria.>
TROUBLE SYMPTOM:
•Engine stalls.
•Erroneous idling
CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode <Ref. to EN(H6DO)(diag)-45,
OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H6DO)(diag)-35, Inspection
Mode.>.
Step Check Yes No
1CHECK ANY OTHER DTC ON DISPLAY.Is any other DTC displayed? Inspect the rele-
vant DTC using
“List of Diagnostic
Tr o u b l e C o d e
(DTC).” <Ref. to
EN(H6DO)(diag)-
69, List of Diag-
nostic Trouble
Code (DTC).>
Go to step 2.
2CHECK 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 procedures, refer to
“READ CURRENT DATA FOR ENGINE”. <Ref.
to EN(H6DO)(diag)-26, Subaru Select Moni-
tor.>
•General scan tool
For detailed operation procedure, refer to the
general scan tool operation manual.
Is the AVCS system operating
angle approx. 0 deg., and oil
flow control solenoid valve duty
output approx. 10%?
Check the follow-
ing item and repair
or replace if nec-
essary.
•Oil pipe (clog)
•Oil flow con-
trol solenoid
valve (clog or
dirt of oil rout-
ing, setting of
spring, clog of
valve)
•Intake cam-
shaft (dirt, dam-
age of
camshaft)
•Timing chain
(matching of
timing mark)
A temporary mal-
function. Perform
the following, and
clean the oil rout-
ing.
Replace the
engine oil and idle
the engine for 5
minutes, and then
replace the oil filter
and engine oil.

EN(H6DO)(diag)-78
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
B: DTC P0016 CRANKSHAFT POSITION - CAMSHAFT POSITION CORRELA-
TION (BANK 1)
DTC DETECTING CONDITION:
•Detected when two consecutive driving cycles with fault occur.
•GENERAL DESCRIPTION <Ref. to GD(H6DO)-11, DTC P0016 CRANKSHAFT POSITION - CAMSHAFT
POSITION CORRELATION (BANK 1), Diagnostic Trouble Code (DTC) Detecting Criteria.>
TROUBLE SYMPTOM:
•Engine stalls.
•Erroneous idling
CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode <Ref. to EN(H6DO)(diag)-45,
OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H6DO)(diag)-35, Inspection
Mode.>.
Step Check Yes No
1CHECK ANY OTHER DTC ON DISPLAY.Is any other DTC displayed? Inspect the rele-
vant DTC using
“List of Diagnostic
Tr o u b l e C o d e
(DTC).” <Ref. to
EN(H6DO)(diag)-
69, List of Diag-
nostic Trouble
Code (DTC).>
Go to step 2.
2CHECK 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 procedures, refer to
“READ CURRENT DATA FOR ENGINE”. <Ref.
to EN(H6DO)(diag)-26, Subaru Select Moni-
tor.>
•General scan tool
For detailed operation procedure, refer to the
general scan tool operation manual.
Is the AVCS system operating
angle approx. 0 deg., and oil
flow control solenoid valve duty
output approx. 10%?
Check the follow-
ing item and repair
or replace if nec-
essary.
•Oil pipe (clog)
•Oil flow con-
trol solenoid
valve (clog or
dirt of oil rout-
ing, setting of
spring, clog of
valve)
•Intake cam-
shaft (dirt, dam-
age of
camshaft)
•Timing chain
(matching of
timing mark)
A temporary mal-
function. Perform
the following, and
clean the oil rout-
ing.
Replace the
engine oil and idle
the engine for 5
minutes, and then
replace the oil filter
and engine oil.

EN(H6DO)(diag)-79
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
C: DTC P0018 CRANKSHAFT POSITION - CAMSHAFT POSITION CORRELA-
TION (BANK 2)
DTC DETECTING CONDITION:
•Detected when two consecutive driving cycles with fault occur.
•GENERAL DESCRIPTION <Ref. to GD(H6DO)-11, DTC P0018 CRANKSHAFT POSITION - CAMSHAFT
POSITION CORRELATION (BANK 2), Diagnostic Trouble Code (DTC) Detecting Criteria.>
TROUBLE SYMPTOM:
•Engine stalls.
•Erroneous idling
CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode <Ref. to EN(H6DO)(diag)-45,
OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H6DO)(diag)-35, Inspection
Mode.>.
Step Check Yes No
1CHECK ANY OTHER DTC ON DISPLAY.Is any other DTC displayed? Check the appro-
priate DTC using
the “List of Diag-
nostic Trouble
Code (DTC)”.
<Ref. to
EN(H6DO)(diag)-
69, List of Diag-
nostic Trouble
Code (DTC).>
Go to step 2.
2CHECK CURRENT DATA.
1) Start the engine and let it idle.
2) Check 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 procedures, refer to
“READ CURRENT DATA FOR ENGINE”. <Ref.
to EN(H6DO)(diag)-26, Subaru Select Moni-
tor.>
•General scan tool
For detailed operation procedure, refer to the
general scan tool operation manual.
Is the AVCS system operating
angle approx. 0 deg., and oil
flow control solenoid valve duty
output approx. 10%?
Check the follow-
ing item and repair
or replace if nec-
essary.
•Engine oil
(amount, dirt)
•Oil pipe (clog)
•Oil flow con-
trol solenoid
valve (clog or
dirt of oil rout-
ing, setting of
spring, clog of
valve)
•Intake cam-
shaft (dirt, dam-
age of
camshaft)
•Timing chain
(matching of
timing mark)
A temporary mal-
function. Perform
the following, and
clean the oil rout-
ing.
Replace the
engine oil and idle
the engine for 5
minutes, and then
replace the oil filter
and engine oil.

EN(H6DO)(diag)-80
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
D: DTC P0021 INTAKE CAMSHAFT POSITION TIMING - OVER-ADVANCED
(BANK 2)
DTC DETECTING CONDITION:
•Detected when two consecutive driving cycles with fault occur.
•GENERAL DESCRIPTION <Ref. to GD(H6DO)-11, DTC P0021 INTAKE CAMSHAFT POSITION TIMING
- OVER-ADVANCED (BANK 2), Diagnostic Trouble Code (DTC) Detecting Criteria.>
TROUBLE SYMPTOM:
•Engine stalls.
•Erroneous idling
CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode <Ref. to EN(H6DO)(diag)-45,
OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H6DO)(diag)-35, Inspection
Mode.>.
Step Check Yes No
1CHECK ANY OTHER DTC ON DISPLAY.Is any other DTC displayed? Check the appro-
priate DTC using
the “List of Diag-
nostic Trouble
Code (DTC)”.
<Ref. to
EN(H6DO)(diag)-
69, List of Diag-
nostic Trouble
Code (DTC).>
Go to step 2.
2CHECK CURRENT DATA.
1) Start the engine and let it idle.
2) Check 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 procedures, refer to
“READ CURRENT DATA FOR ENGINE”. <Ref.
to EN(H6DO)(diag)-26, Subaru Select Moni-
tor.>
•General scan tool
For detailed operation procedure, refer to the
general scan tool operation manual.
Is the AVCS system operating
angle approx. 0 deg., and oil
flow control solenoid valve duty
output approx. 10%?
Check the follow-
ing item and repair
or replace if nec-
essary.
•Engine oil
(amount, dirt)
•Oil pipe (clog)
•Oil flow con-
trol solenoid
valve (clog or
dirt of oil rout-
ing, setting of
spring, clog of
valve)
•Intake cam-
shaft (dirt, dam-
age of
camshaft)
•Timing chain
(matching of
timing mark)
A temporary mal-
function. Perform
the following, and
clean the oil rout-
ing.
Replace the
engine oil and idle
the engine for 5
minutes, and then
replace the oil filter
and engine oil.

EN(H6DO)(diag)-81
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
E: DTC P0026 INTAKE VALVE CONTROL SOLENOID CIRCUIT RANGE/PER-
FORMANCE (BANK 1)
DTC DETECTING CONDITION:
•Immediately at fault recognition
•GENERAL DESCRIPTION <Ref. to GD(H6DO)-12, DTC P0026 INTAKE VALVE CONTROL SOLENOID
CIRCUIT RANGE/PERFORMANCE (BANK 1), Diagnostic Trouble Code (DTC) Detecting Criteria.>
TROUBLE SYMPTOM:
Erroneous idling
CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode <Ref. to EN(H6DO)(diag)-45,
OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H6DO)(diag)-35, PROCEDURE,
Inspection Mode.>.
WIRING DIAGRAM:
EN-03655
B134
31
B20
E19
ECM
B20
1234567891011 121314 15 16
1
VARIABLE VALVE LIFT DIAGNOSIS OIL PRESSURE SWITCH RH
E71
B134
85610 11 12 13 14 157213416
3019 20 2228 29
91718252123 24323126 2733 34

EN(H6DO)(diag)-83
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
F: DTC P0028 INTAKE VALVE CONTROL SOLENOID CIRCUIT RANGE/PER-
FORMANCE (BANK 2)
DTC DETECTING CONDITION:
•Immediately at fault recognition
•GENERAL DESCRIPTION <Ref. to GD(H6DO)-15, DTC P0028 INTAKE VALVE CONTROL SOLENOID
CIRCUIT RANGE/PERFORMANCE (BANK 2), Diagnostic Trouble Code (DTC) Detecting Criteria.>
TROUBLE SYMPTOM:
Erroneous idling
CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode <Ref. to EN(H6DO)(diag)-45,
OPERATION, Clear Memory Mode.> and Inspection Mode <Ref. to EN(H6DO)(diag)-35, PROCEDURE,
Inspection Mode.>.
WIRING DIAGRAM:
EN-03656
B134
32
B20
E110
ECM
B20
1234567891011 121314 15 16
VARIABLE VALVE LIFT DIAGNOSISOIL PRESSURE SWITCH LH
E72
B134
85610 11 12 13 14 157213416
3019 20 2228 29
91718252123 24323126 2733 34