ignition SUBARU TRIBECA 2009 1.G Service Workshop Manual

LU(H6DO)-6
Oil Pressure System
LUBRICATION
B: INSPECTION
Step Check Yes No
1CHECK COMBINATION METER.
1) Turn the ignition switch ON. (Engine OFF)
2) Check the warning light of combination
meter.
Does the warning light illumi-
nate?
Go to step 2.Repair or replace
the combination
meter. 4, INSPECTION,
Combination
Meter System.>
2CHECK HARNESS CONNECTOR BETWEEN
COMBINATION METER AND OIL PRES-
SURE SWITCH.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from oil pressure
switch.
3) Turn the ignition switch ON.
4) Measure the voltage of harness between oil
pressure switch connector and chassis ground.
Connector & terminal
(E11) No. 1 (+) — Chassis ground (–):
Is the voltage more than 10 V? Replace the oil
pressure switch.
Go to step 3.
3CHECK COMBINATION METER.
1) Turn the ignition switch to OFF.
2) Remove the combination meter.
3) Measure the resistance of combination
meter.
Te r m i n a l s
(i10) No. 4 — (i77) No. 10:
(i10) No. 3 — (i77) No. 10:
Is the resistance less than 10
Ω?
Replace the har-
ness connector
between combina-
tion meter and oil
pressure switch.
Repair or replace
the combination
meter. 4, INSPECTION,
Combination
Meter System.>

ME(H6DO)-2
General Description
MECHANICAL
1. General Description
A: SPECIFICATION
NOTE:
OS: Oversize US: undersize
Engine
Cylinder arrangementHorizontally opposed, liquid cooled,
6-cylinder, 4-stroke gasoline engine
Va l ve s y s t e m m e c h a n i s mChain driven, double overhead camshaft,
4-valve/cylinder
Inside diameter×stroke mm (in) 89.2 × 80 (3.512 × 3.150)
Displacementcm3 (cu in)3,000 (183)
Compression ratio10.7
Compression pressure (350 rpm and fully open
throttle):kPa (kgf/cm2, psi)1,275 — 1,471 (13.0 — 15.0, 185 — 213)
Number of piston rings Pressure ring: 2, Oil ring: 1
Intake valve timing
Min. advanceOpen BTDC 47°
Close ABDC 23°
Max. retardOpen ATDC 3°
Close ABDC 73°
Exhaust valve timingOpen BBDC 60°
Close ATDC 6°
Va l ve c l e a r a n c e m m ( i n )Intake0.20 +0.04 -0.06 (0.0079 +0.0016 -0.0024)
EXHAUST 0.35±0.05 (0.0138±0.020)
Idle rpm [“P” or “N” range] rpmNo load 650±50
A/C ON 770±50
Ignition order 1 → 6 →3 → 2 → 5 → 4
Ignition timing BTDC/rpm 15°±8°/650

ME(H6DO)-21
Compression
MECHANICAL
2. Compression
A: INSPECTION
CAUTION:
After warming-up, engine becomes very hot. Be
careful not to burn yourself during measure-
ment.
1) After warming-up the engine, turn the ignition
switch to OFF.
2) Make sure that the battery is fully charged.
3) Release the fuel pressure.
PRESSURE, PROCEDURE, Fuel.>
4) Remove all the spark plugs. 4, REMOVAL, Spark Plug.>
5) Check the starter motor for satisfactory perfor-
mance and operation.
6) Hold the compression gauge tightly against the
spark plug hole.
NOTE:
When using a screw-in type compression gauge,
the screw (put into cylinder head spark plug hole)
should be less than 18 mm (0.71 in) long.
7) Fully open the throttle valve.
8) Crank the engine by means of the starter motor,
and read the maximum value on the gauge when
the pointer is steady.
9) Perform at least two measurements per cylinder,
and make sure that the values are correct.
Compression (350 rpm and fully open throttle):
Standard:
1,275 — 1,471 kPa (13.0 — 1.50 kgf/cm2,
185 — 213 psi)
Service limit:
1,128 kPa (11.5 kgf/cm2, 164 psi)
ME-00446

ME(H6DO)-22
Idle Speed
MECHANICAL
3. Idle Speed
A: INSPECTION
1) Before checking the idle speed, check the fol-
lowing item:
(1) Check the air cleaner element is free from
clogging, ignition timing is correct, spark plugs
are in good condition, and hoses are connected
properly.
(2) Check the malfunction indicator light does
not illuminate.
2) Idle the engine.
3) Stop the engine, and turn the ignition switch to
OFF.
4) Insert the cartridge to Subaru Select Monitor.
5) Connect the Subaru Select Monitor to data link
connector.
6) Turn the ignition switch to ON and Subaru Select
Monitor switch to ON.
7) Select {Each System Check} in Main Menu.
8) Select {Engine} in Selection Menu.
9) Select {Current Data Display & Save} in Engine
Control System Diagnosis.
10) Select {Data Display} in Data Display Menu.
11) Start the engine, and read the engine idle
speed.
12) Check the idle speed when no-loaded. (Head-
light, heater fan, rear defroster, radiator fan, A/C
and etc. are OFF)
Idle speed [No load and gears in neutral]:
650±50 rpm
13) Check the idle speed when loaded. (Turn the A/
C switch to “ON” and operate the compressor for at
least one minute before measurement.)
Idle speed [A/C ON and gears in neutral]:
770±50 rpm
NOTE:
Idle speed cannot be adjusted manually, because
the idle speed is automatically adjusted. If the pre-
scribed idle speed cannot be maintained, refer to
General On-board Diagnosis Table under “Engine
Control System”. sic Diagnostic Procedure.>

ME(H6DO)-23
Ignition Timing
MECHANICAL
4. Ignition Timing
A: INSPECTION
CAUTION:
After warming-up, engine becomes very hot. Be
careful not to burn yourself at measurement.
1) Before checking the ignition timing, check the
following item:
(1) Check the air cleaner element is free from
clogging, spark plugs are in good condition, and
hoses are connected properly.
(2) Check the malfunction indicator light does
not illuminate.
2) Idle the engine.
3) Stop the engine, and turn the ignition switch to
OFF.
4) Insert the cartridge to Subaru Select Monitor.
5) Connect the Subaru Select Monitor to data link
connector.
6) Turn the ignition switch to ON and Subaru Select
Monitor switch to ON.
7) Select {Each System Check} in Main Menu.
8) Select {Engine} in Selection Menu.
9) Select {Current Data Display & Save} in Engine
Control System Diagnosis.
10) Select {Data Display} in Data Display Menu.
11) Start the engine and check the ignition timing at
idle speed.
Ignition timing [BTDC/rpm]:
15°±8°/650
If the timing is not correct, check the ignition control
system. Refer to Engine Control System. EN(H6DO)(diag)-2, Basic Diagnostic Procedure.>

ME(H6DO)-24
Intake Manifold Vacuum
MECHANICAL
5. Intake Manifold Vacuum
A: INSPECTION
1) Idle the engine.
2) Disconnect the brake vacuum hose from intake
manifold, and then install the vacuum gauge.
3) Keep the engine at idle speed and read the vac-
uum gauge indication.
By observing the gauge needle movement, internal
condition of the engine can be diagnosed as de-
scribed below.
Vacuum pressure (at idling, A/C OFF):
–60.0 kPa ( –450 mmHg, –17.72 inHg) or less
ME-02655
Diagnosis of engine condition by measurement of intake manifold vacuum
Va c u u m g a u g e i n d i c a t i o n Po s s i bl e e n g i n e c o n d i t i o n
1. Needle is steady but lower than normal position. This ten-
dency becomes more evident as engine temperature rises.
Air leakage around intake manifold gasket, disconnection or
damage of vacuum hose
2. Needle intermittently drops to position lower than normal
position.
Leakage around cylinder
3. Needle drops suddenly and intermittently from normal posi-
tion.
Sticky valve
4. When engine speed is gradually increased, needle begins to
vibrate rapidly at certain speed, and then vibration increases as
engine speed increases.
Weak or broken valve spr ings
5. Needle vibrates above and below normal position in narrow
range.
Defective ignition system or throttle chamber idle adjustment

ME(H6DO)-27
Valve Clearance
MECHANICAL
8. Valve Clearance
A: INSPECTION
Inspection and adjustment of valve clearance
should be performed while engine is cold.
1) Set the vehicle on a lift.
2) Remove the collector cover.
3) Disconnect the ground cable from battery.
4) Lift-up the vehicle.
5) Remove the under cover.
6) Lower the vehicle.
7) When inspecting RH side cylinders:
(1) Remove the air intake duct and air cleaner
case. take Duct.> Air Cleaner Case.>
(2) Remove the fuel tank protector (RH).
(3) Disconnect the connector of oil pressure
switch.
(4) Remove the ignition coil. IG(H6DO)-7, REMOVAL, Ignition Coil & Ignitor
Assembly.>
(5) Remove the rocker cover (RH).
8) When inspecting LH side cylinders:
(1) Disconnect the battery cable, and then re-
move the battery and battery carrier.
(2) Disconnect the PCV hose and blow-by hose
from rocker cover (LH).
(3) Remove the fuel pipe protector (LH).
(4) Remove the ignition coil. IG(H6DO)-7, REMOVAL, Ignition Coil & Ignitor
Assembly.>
(5) Remove the rocker cover (LH).
9) Turn the crankshaft clockwise until the cam is
set to position shown in the figure.
FU-02119
ME-00460
(1) Valve clearance (Intake side)
(2) Valve clearance (Exhaust side)
(3) High lift cam
(4) Low lift cam
FU-02117
ME-02565
(4)(3)(3)(4)
(1)
(2)
(1)
(2)
(23 )(23 )

ME(H6DO)-90
Engine Noise
MECHANICAL
29.Engine Noise
A: INSPECTION
(NOTE*)
When disconnecting the fuel injector connector, the malfunction indicator light illuminates and DTC is stored in ECM memory.
Therefore, carry out the clear memory mode and inspection
mode after connecting the fuel injector connector.
Ty p e o f s o u n d C o n d i t i o n P o s s i b l e c a u s e
Regular clicking soundSound increases as engine
speed increases.
•Valve mechanism is defective.
•Incorrect valve clearance
•Worn valve rocker
•Worn camshaft
•Broken valve spring
•Trouble of tappet
Heavy and dull clankOil pressure is low.•Worn camshaft main bearing
•Worn connecting rod bearing (large end)
Oil pressure is normal. Damaged engine mounting
High-pitched clank
Sound is noticeable when
accelerating with an overload
condition.
•Ignition timing advanced
•Accumulation of carbon inside combustion chamber
•Wrong spark plug
•Improper gasoline
Clank when engine speed is
between 1,000 and 2,000
rpms.
Sound is reduced when fuel
injector connector of noisy cyl-
inder is disconnected.
(NOTE*)
•Worn crankshaft main bearing
•Worn bearing at crankshaft end of connecting rod
Knocking sound when engine
is operating under idling speed
and engine is warm
Sound is reduced when fuel
injector connector of noisy cyl-
inder is disconnected.
(NOTE*)
•Worn cylinder liner and piston ring
•Broken or stuck piston ring
•Worn piston pin and hole at piston end of connecting rod
Sound is not reduced if each
fuel injector connector is dis-
connected in turn. (NOTE*)
•Unusually worn valve lifter
•Worn cam gear
•Worn camshaft journal bore in crankcase
Squeaky sound — • Insufficient generator lubrication
Rubbing sound — • Poor contact of generator brush and rotor
Gear scream when starting
engine—•Defective ignition starter switch
•Worn gear and starter pinion
Sound like polishing glass with
a dry cloth—•Loose drive belt
•Defective water pump shaft
Hissing sound —•Insufficient compression
•Air leakage in air intake system, hose, connection or manifold
Timing belt noise —•Loose timing belt
•Belt contacting with case/adjacent part
Va l ve t a p p e t n o i s e —•Incorrect valve clearance
•Trouble of tappet

SC(H6DO)-25
Battery
STARTING/CHARGING SYSTEMS
4. Battery
A: REMOVAL
1) Disconnect the positive (+) terminal after discon-
necting the negative (–) terminal of battery.
2) Remove the flange nut from battery rod and re-
move battery holder.
3) Remove the battery.
B: INSTALLATION
Install in the reverse order of removal.
Tightening torque:
3.4 N·m (0.35 kgf-m, 2.5 ft-lb)
NOTE:
•Clean the battery cable terminals and apply
grease to retard the formation of corrosion.
•Connect the positive (+) terminal, and then con-
nect the negative (–) terminal of the battery.
•Initial diagnosis of electronic control throttle is
performed after battery installation. Because of
this, start the engine 10 seconds or more after the
ignition switch is turned ON.
C: INSPECTION
WARNING:
•Electrolyte has toxicity; be careful of han-
dling the fluid.
•Avoid contact with skin, eyes or clothing. Es-
pecially at contact with eyes, flush with water
for 15 minutes and get prompt medical atten-
tion.
•Batteries produce explosive gases. Keep
sparks, flame, cigarettes away.
•Ventilate when charging or using in enclosed
space.
•For safety, in case an explosion does occur,
wear eye protection or shield your eyes when
working near any battery. Never lean over a bat-
tery.
•Do not let battery fluid contact eyes, skin,
fabrics, or paint-work because battery fluid is
corrosive acid.
•To lessen the risk of sparks, remove rings,
metal watch-bands, and other metal jewelry.
Never allow metal tools to contact the positive
battery terminal and anything connected to it
while you are at the same time in contact with
any other metallic portion of the vehicle. This
may cause short circuit.
1. EXTERNAL PARTS
Check the battery case, top cover, vent plugs, and
terminal posts for dirt or cracks. If necessary, clean
with water and wipe with a dry cloth.
Apply a thin coat of grease on the terminal posts to
prevent corrosion.
2. ELECTROLYTE LEVEL
Check the electrolyte level in each cell. If the level
is below MIN level, bring the level to MAX level by
pouring distilled water into the battery cell. Do not
fill beyond MAX level.
SC-02100

PM-9
Spark Plug
PERIODIC MAINTENANCE SERVICES
5. Spark Plug
A: REPLACEMENT
1) Remove the battery and battery carrier.
2) Remove the air cleaner case.
3) Detach the connector from ignition coil.
4) Remove the ignition coil.
5) Remove the spark plug with a spark plug socket.
6) Tighten the new spark plug lightly with hand, and
then secure with a spark plug socket to the speci-
fied torque.
Recommended spark plug:
NGK: ILFR6B
Tightening torque:
21 N·m (2.1 kgf-m, 15.2 ft-lb)
7) Tighten the ignition coil.
Tightening torque:
16 N·m (1.6 kgf-m, 11.7 ft-lb)
NOTE:
•Be sure to place the gasket between the cylinder
head and spark plug.
•If the torque wrench is not available, tighten the
spark plug until gasket contacts cylinder head; then
tighten further 1/4 to 1/2 turns.
(A) Bracket
(B) Connector
IG-02004(B)
(A)
PM-00112