Page 1417 of 2248
1.Check DTC P0100, P0101, P0115, P0125,
P0201, P0202, P0203 and P0204 on display.
No
Ye s
Inspect DTC P0100, P0101, P0115, P0125, P0201,
P0202, P0203 and P0204 using“11. Diagnostics Chart
with Trouble Code [T1100]”.
In this case, it is unnecessary to inspect DTC
P0301, P0302, P0303 and P0304.
2.Connect Subaru Select Monitor and read data.
3.Check air intake system.
4.Check misfire symptom.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
[T3D0] and [T3E0].>
WIRING DIAGRAM:
LHD model
OBD0282
211
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11. Diagnostics Chart with Trouble Code
Page 1418 of 2248
WIRING DIAGRAM:
RHD model
B2M0452
212
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11. Diagnostics Chart with Trouble Code
Page 1419 of 2248
OBD0145A
2CONNECT SUBARU SELECT MONITOR AND
READ DATA.
1) Turn ignition switch to OFF.
2) Connect Subaru Select Monitor to the data link connec-
tor.
3) Turn ignition switch to ON, and turn Subaru Select
Monitor switch to ON.
G3M0152
4) Read data on Subaru Select Monitor.
Designate mode use function key.
Function mode: F33, F34, F35, F36, F37 and F38
NOTE:
F37 and F38 are AT models only.
F33: Maximum misfire rate of cylinder #1 is indicated.
F34: Maximum misfire rate of cylinder #2 is indicated.
F35: Maximum misfire rate of cylinder #3 is indicated.
F36: Maximum misfire rate of cylinder #4 is indicated.
F37: Maximum EGR system pressure value is indicated.
F38: Minimum EGR system pressure value is indicated.
G3M0152
5) Clear memory on Subaru Select Monitor.
Designate mode use function key.
Press [F], [C], [0], [ENT] in that order.
6) Start engine, and drive the vehicle more than 10 min-
utes.
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OBD0627
7) Read data on Subaru Select Monitor.
Designate mode use function key.
Function mode: F33, F34, F35 and F36
: Is the maximum misfire rate of each cylin-
der less than 2 %?
: Go to next.
: Go to step 3.
: The vehicle has been empty of fuel.
:The engine has no abnormality.
Finish diagnostics operation.
: Go to next.
: Check if the cause of misfire was made
when the engine is running.
Ex. Remove spark plug cord, etc.
:The engine has no abnormality.
Finish diagnostics operation.
: Repair poor contact in ignitor, ignition coil, fuel
injector, ECM and coupling harness connector.
3
CHECK AIR INTAKE SYSTEM.
: Check the following items.
1Are there air leaks or air suction caused
by loose or dislocated nuts and bolts?
2Are there cracks or any disconnection of
hoses?
: Repair air intake system.
: Go to step 4.
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4
CHECK MISFIRE SYMPTOM.
NOTE:
Perform diagnosis according to the items listed below.
Use the MAX. misfire rate values read in step 2-4).
DTC MAX. misfire rate Next
Only one cylinder—Go to step1.
P0301 and P0302 Both rate are at 100 %, or more. Go to step
2.
P0303 and P0304 Both rate are at 100 %, or more. Go to step
3.
P0301 and P0303 Both rate are at 100 %, or more. Go to step
4.
P0302 and P0304 Both rate are at 100 %, or more. Go to step
5.
Others—Go to step
6.
1ONLY ONE CYLINDER
: Check the following items for that cylinder.
Spark plug
Spark plug cord
Fuel injector
Compression ratio
2GROUP OF #1 AND #2 CYLINDERS
: Check the following items for #1 and #2 cyl-
inders.
Spark plugs
Fuel injectors
NOTE:
If no abnormal is discovered, check for“9. F: IGNITION
SYSTEM”of #1 and #2 cylinders side.
3GROUP OF #3 AND #4 CYLINDERS
: Check the following items for #3 and #4 cyl-
inders.
Spark plugs
Fuel injectors
NOTE:
If no abnormal is discovered, check for“9. F: IGNITION
SYSTEM”of #3 and #4 cylinders side.
4GROUP OF #1 AND #3 CYLINDERS
: Check the following items for #1 and #3 cyl-
inders.
Spark plugs
Fuel injectors
Skipping timing belt teeth
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5GROUP OF #2 AND #4 CYLINDERS
: Check the following items for #2 and #4 cyl-
inders.
Spark plugs
Fuel injectors
Skipping timing belt teeth
6THE CYLINDER AT RANDOM
: Is the engine idle rough?
: Go to next. (AT models only)
: Go to DTC P0170 [T11P3], [T11P4] and [T11P5].
NOTE:
On MT models, go to DTC P0170 [T11P3], [T11P4] and
[T11P5].
OBD0631
OBD0632
: Is the differential pressure between maxi-
mum EGR system pressure (value of func-
tion mode F37) and minimum EGR system
pressure (value of function mode F38) less
than 10 mmHg?
NOTE:
Use the values read in step 3 for function modes F37 and
F38.
: Replace EGR valve.
: Go to DTC P0170 [T11P3], [T11P4] and [T11P5].
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OBD0283
Y: DTC P0325
—KNOCK SENSOR CIRCUIT MALFUNCTION
(KNOCK)—
OBD0284A
DESCRIPTION:
The knock sensor senses engine knocks and send a volt-
age signal to the ECM depending on the degree of the
knock.
This signal information is used for spark timing learning
control to provide optimal spark timing.
The knock sensor is bolted to the cylinder block at #4 pis-
ton. It senses knocks which can occur in any cylinder. Its
components are a weight, which moves up and down when
it senses vibrations, a piezo element, which produces a
voltage, and a resistor, which senses a broken circuit (all
these are molded into a single unit). When the sensor
senses engine knocks, knocking vibration is conveyed to
the weight. The up or down movement of the weight is
applied to the piezo element as a pressure difference. The
knock sensor will then produce a voltage signal in relation
to the degree of the knock.
DTC DETECTING CONDITION:
Immediately at fault recognition
TROUBLE SYMPTOM:
Poor driving performance
Knocking occurs.
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1.Check harness.
2.Check knock sensor.
3.Check knock sensor.
4.Check input signal for ECM.
CAUTION:
After repair or replacement of faulty parts, conduct
CLEAR MEMORY and INSPECTION MODES.
WIRING DIAGRAM:
OBD0285
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