Page 1456 of 2453
EN(H6DO)(diag)-295
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
CR:DTC P0500 VEHICLE SPEED SENSOR
DTC DETECTING CONDITION:
•Immediately at fault recognition
•GENERAL DESCRIPTION
Trouble Code (DTC) Detecting Criteria.>
CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode
OPERATION, Clear Memory Mode.> and Inspection Mode
Inspection Mode.>.
Step Check Yes No
1CHECK DTC OF VDC.
Check DTC of VDC.
Is DTC of VDC displayed? Perform the diag-
nosis according to
DTC.
VDC(diag)-34, List
of Diagnostic Trou-
ble Code (DTC).>
Repair the poor
contact of ECM.
Page 1459 of 2453
EN(H6DO)(diag)-298
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
CU:DTC P0512 STARTER REQUEST CIRCUIT
DTC DETECTING CONDITION:
•Immediately at fault recognition
•GENERAL DESCRIPTION
nostic Trouble Code (DTC) Detecting Criteria.>
TROUBLE SYMPTOM:
Failure of engine to start
CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode
OPERATION, Clear Memory Mode.> and Inspection Mode
Inspection Mode.>.
Page 1461 of 2453

EN(H6DO)(diag)-300
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
CV:DTC P0519 IDLE CONTROL SYSTEM MALFUNCTION (FAIL-SAFE)
DTC DETECTING CONDITION:
•Immediately at fault recognition
•GENERAL DESCRIPTION
TION (FAIL-SAFE), Diagnostic Trouble Code (DTC) Detecting Criteria.>
TROUBLE SYMPTOM:
Engine keeps running at higher speed than specified idle speed.
CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode
OPERATION, Clear Memory Mode.> and Inspection Mode
Inspection Mode.>.
CW:DTC P0600 SERIAL COMMUNICATION LINK
NOTE:
For the diagnostic procedure, refer to LAN section.
Step Check Yes No
1CHECK OPERATION OF STARTER MOTOR.
Tu r n t h e i g n i t i o n s w i t c h t o O N .
NOTE:
Place the inhibitor switch in each position.
Does the starter motor oper-
ate?
Repair the battery
short circuit in
starter motor cir-
cuit.
Check the starter
motor circuit.
to
EN(H6DO)(diag)-
58, STARTER
MOTOR CIRCUIT,
Diagnostics for
Engine Starting
Fai lu r e.>
Step Check Yes No
1CHECK ANY OTHER DTC ON DISPLAY.Is any other DTC displayed? Check DTC using
“List of Diagnostic
Tr o u b l e C o d e
(DTC)”.
EN(H6DO)(diag)-
69, List of Diag-
nostic Trouble
Code (DTC).>
NOTE:In this case, it is
not necessary to
inspect DTC
P0519.
Go to step 2.
2CHECK AIR INTAKE SYSTEM.
1) Turn the ignition switch to ON.
2) Start and idle the engine.
3) Check the following item.
•Loose installation of intake manifold and
throttle body
•Cracks of intake manifold gasket and throttle
body gasket
•Disconnection of vacuum hoses
Is there any fault in air intake
system?
Repair air suction
and leaks.
Go to step 3.
3CHECK ELECTRONIC THROTTLE CON-
TROL.
1) Turn the ignition switch to OFF.
2) Remove the electronic throttle control.
3) Check the electronic throttle control.
Are foreign matter found inside
electronic throttle control?
Remove foreign
matter from elec-
tronic throttle con-
trol.
Per fo r m th e di ag -
nosis of DTC
P2101.
Page 1462 of 2453

EN(H6DO)(diag)-301
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
CX:DTC P0604 INTERNAL CONTROL MODULE RANDOM ACCESS MEMORY
(RAM) ERROR
DTC DETECTING CONDITION:
•Immediately at fault recognition
•GENERAL DESCRIPTION
DOM ACCESS MEMORY (RAM) ERROR, Diagnostic Trouble Code (DTC) Detecting Criteria.>
TROUBLE SYMPTOM:
•Engine does not start.
•Engine stalls.
CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode
OPERATION, Clear Memory Mode.> and Inspection Mode
Inspection Mode.>.
CY:DTC P0605 INTERNAL CONTROL MODULE READ ONLY MEMORY (ROM)
ERROR
NOTE:
For the diagnostic procedure, refer to DTC P0607.
MODULE PERFORMANCE, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>
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)”.
EN(H6DO)(diag)-
69, List of Diag-
nostic Trouble
Code (DTC).>
Te m p o r a r y p o o r
contact occurs.
Page 1463 of 2453

EN(H6DO)(diag)-302
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
CZ:DTC P0607 CONTROL MODULE PERFORMANCE
DTC DETECTING CONDITION:
•Immediately at fault recognition
•GENERAL DESCRIPTION
Diagnostic Trouble Code (DTC) Detecting Criteria.>
TROUBLE SYMPTOM:
•Erroneous idling
•Poor driving performance
CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode
OPERATION, Clear Memory Mode.> and Inspection Mode
Inspection Mode.>.
WIRING DIAGRAM:
EN-03736
SBF-6MAIN SBF
SBF-7
B72
B2A7C23
D7D3D1A5
B5B19
NO.12B47
E2
B21
12
46
53
ECM
EE
36
B134A:
D:B137
B135B:
B136C:
A3
52373634
3412
56
B47
TO OXYGEN SENSOR
NO.13
D2
35
B21
123412131415567816171819910 1120212223 24 25 2627 28 29 3031 32 33
3534 37363938 41404342 4445 47464948 51505352 54
B72
134562
B134
56 7821943102422 23 2511 12 13 14 1526 2728
16 1718 19 20 2133 34293230 31
A:B135
567821943102422 23 2511 12 13 14 1526 2728
16 17 18 1920 2129 30 31 32 33 34 35
B:
B137
5678219431022 2311 12 13 14 1524 2526
16 1718 19 20 2127 28 29 30 31
D:
SBF-5
D6D26
54
MAIN RELAY
BATTERYIGNITIONSWITCH
B136
16101112131415252430
9871718192028212223293231
123456
2726333435
C:
Page 1468 of 2453

EN(H6DO)(diag)-307
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
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)”.
EN(H6DO)(diag)-
69, List of Diag-
nostic Trouble
Code (DTC).>
Go to step 2.
2CHECK FRONT OXYGEN (A/F) SENSOR DA-
TA.
1) Start the engine.
2) While observing the Subaru Select Monitor
or general scan tool screen, warm-up the
engine until engine coolant temperature is
above 75°C (167°F).
If the engine is already warmed-up, operate at
idle speed for at least 1 minute.
3) Read data of front oxygen (A/F) sensor sig-
nal using the Subaru Select Monitor or general
scan tool.
NOTE:
•Subaru Select Monitor
For detailed operation procedures, refer to
“READ CURRENT DATA FOR ENGINE”.
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 measured value within
0.86 — 1.15 at idle?
Go to step 3.Go to step 4.
3CHECK REAR OXYGEN SENSOR SIGNAL.
1) Race engine at speeds from idling to 5,000
rpm for a total of 5 cycles.
NOTE:To increase engine speed to 5,000 rpm, slowly
depress accelerator pedal, taking approximate-
ly 5 seconds, and quickly release accelerator
pedal to decrease engine speed.
2) Operate the LED operation mode for
engine.
NOTE:•Subaru Select Monitor
For detailed operation procedure, refer to the
“LED OPERATION MODE FOR ENGINE”.
Monitor.>
Does the LED of {Rear O2
Rich Signal} blink?
Check front oxy-
gen (A/F) sensor
circuit.
Check rear oxygen
sensor circuit.
FU(H6DO)-30,
Rear Oxygen Sen-
sor.>
4 CHECK EXHAUST SYSTEM.
Check exhaust system parts.
NOTE:Check the following items.
•Looseness of part installation
•Damage (crack, hole etc.) of parts
•Looseness of the front oxygen (A/F) sensor
•Looseness or ill fitting of parts between front
oxygen (A/F) sensor and rear oxygen sensor
Is there any fault in exhaust
system?
Repair or replace
faulty par ts.
Replace the front
oxygen (A/F) sen-
sor.
FU(H6DO)-28,
Fr o nt Ox yg en ( A /
F) Sensor.>
Page 1472 of 2453

EN(H6DO)(diag)-311
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
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)”.
EN(H6DO)(diag)-
69, List of Diag-
nostic Trouble
Code (DTC).>
Go to step 2.
2CHECK FRONT OXYGEN (A/F) SENSOR DA-
TA.
1) Start the engine.
2) While observing the Subaru Select Monitor
or general scan tool screen, warm-up the
engine until engine coolant temperature is
above 75°C (167°F).
If the engine is already warmed-up, operate at
idle speed for at least 1 minute.
3) Read data of front oxygen (A/F) sensor sig-
nal using the Subaru Select Monitor or general
scan tool.
NOTE:
•Subaru Select Monitor
For detailed operation procedures, refer to
“READ CURRENT DATA FOR ENGINE”.
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 measured value within
0.86 — 1.15 at idle?
Go to step 3.Go to step 4.
3CHECK REAR OXYGEN SENSOR SIGNAL.
1) Race engine at speeds from idling to 5,000
rpm for a total of 5 cycles.
NOTE:To increase engine speed to 5,000 rpm, slowly
depress accelerator pedal, taking approximate-
ly 5 seconds, and quickly release accelerator
pedal to decrease engine speed.
2) Operate the LED operation mode for
engine.
NOTE:•Subaru Select Monitor
For detailed operation procedure, refer to the
“LED OPERATION MODE FOR ENGINE”.
Monitor.>
Does the LED of {Rear O2
Rich Signal} blink?
Check front oxy-
gen (A/F) sensor
circuit.
Check rear oxygen
sensor circuit.
FU(H6DO)-30,
Rear Oxygen Sen-
sor.>
4 CHECK EXHAUST SYSTEM.
Check exhaust system parts.
NOTE:Check the following items.
•Looseness of part installation
•Damage (crack, hole etc.) of parts
•Looseness of the front oxygen (A/F) sensor
•Looseness or ill fitting of parts between front
oxygen (A/F) sensor and rear oxygen sensor
Is there any fault in exhaust
system?
Repair or replace
faulty par ts.
Replace the front
oxygen (A/F) sen-
sor.
FU(H6DO)-28,
Fr o nt Ox yg en ( A /
F) Sensor.>
Page 1474 of 2453
EN(H6DO)(diag)-313
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
DJ:DTC P1443 VENT CONTROL SOLENOID VALVE FUNCTION PROBLEM
DTC DETECTING CONDITION:
•Immediately at fault recognition
•GENERAL DESCRIPTION
FUNCTION PROBLEM, Diagnostic Trouble Code (DTC) Detecting Criteria.>
TROUBLE SYMPTOM:
Improper fuel supply
CAUTION:
After repair or replacement of faulty parts, perform Clear Memory Mode
OPERATION, Clear Memory Mode.> and Inspection Mode
Inspection Mode.>.
WIRING DIAGRAM:
EN-03666
SBF-7
R143R60
R60
R15
R15
R1
R1
B98
B98
B47
ECM
E
17
12
53
64
21
13
9
5
B136
CANISTER
DRAINVA LV E
MAIN RELAYBATTERY
7
B47
3412
56
R143
12
B98
123456 78910 1112 13 16 1714 15 18 19 2021222324
B136
16101112131415252430
9871718192028212223293231
123456
2726333435
R60
12
10115634897131412