engine SUBARU TRIBECA 2009 1.G Service Workshop Manual

BVC(diag)-22
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
BRAKE VACUUM CONTROL (BVC) (DIAGNOSTICS)
9CHECK CURRENT DATA.
1) Turn the ignition switch to ON.
2) Depress the brake pedal several times, until
the pedal becomes firm.
3) Read the current data of the brake negative
pressure pump system using the Subaru
Select Monitor. <Ref. to BVC(diag)-9, Subaru
Select Monitor.>
Is the atmospheric pressure —
brake booster pressure
between –8 — +8 mmHg?
Te m p o r a r y p o o r
contact occurs.
Replace the ECM.
<Ref. to
FU(H6DO)-32,
Engine Control
Module (ECM).>
Step Check Yes No

BVC(diag)-25
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
BRAKE VACUUM CONTROL (BVC) (DIAGNOSTICS)
9CHECK BRAKE VACUUM PUMP.
1) Turn the ignition switch to OFF.
2) Remove the brake vacuum pump. <Ref. to
BR-39, REMOVAL, Brake Vacuum Pump.>
3) Connect the battery positive terminal to the
brake vacuum pump terminal No. 1, and the
negative terminal to terminal No. 2.
Is the brake vacuum pump
operating?
Go to step 10.Replace the brake
vacuum pump.
<Ref. to BR-39,
Brake Vacuum
Pump.>
10 CHECK BRAKE VACUUM PUMP.
1) Connect the brake vacuum pump relay.
2) Connect the connectors to the brake vac-
uum pump and ECM.
3) Turn the ignition switch to ON.
4) Execute the brake negative pressure pump
system function check mode using the Subaru
Select Monitor. <Ref. to BVC(diag)-9, Subaru
Select Monitor.>
Is the brake vacuum pump
operating?
Te m p o r a r y p o o r
contact occurs.
Replace the ECM.
<Ref. to
FU(H6DO)-32,
Engine Control
Module (ECM).>
Step Check Yes No

BVC(diag)-27
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
BRAKE VACUUM CONTROL (BVC) (DIAGNOSTICS)
Step Check Yes No
1CHECK BRAKE VACUUM PUMP RELAY.
1) Turn the ignition switch to OFF.
2) Remove the brake vacuum pump relay from
the relay box.
3) Connect the battery to terminals No. 1 and
No. 3 of the brake vacuum pump relay.
4) Measure the resistance between the brake
vacuum pump relay terminals.
Te r m i n a l s
No. 4 — No. 5:
Is the resistance less than 1
Ω?
Go to step 2.Replace the brake
vacuum pump
relay.
2CHECK BRAKE VACUUM PUMP RELAY
POWER SUPPLY.
1) Turn the ignition switch to ON.
2) Measure the voltage between brake vac-
uum pump relay connector and chassis
ground.
Connector & terminal
(VC2) No. 1 (+) — Chassis ground (–):
(VC2) No. 4 (+) — Chassis ground (–):
Is the voltage more than 10 V? Go to step 3.Repair the open or
ground short cir-
cuit of power sup-
ply circuit.
3CHECK HARNESS BETWEEN ECM AND
BRAKE VACUUM PUMP RELAY CONNEC-
TOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector of ECM.
3) Measure the resistance of the harness
between ECM and the brake vacuum pump
relay connector.
Connector & terminal
(B136) No. 8 — (VC2) No. 3:
(B135) No. 25 — (VC2) No. 5:
Is the resistance less than 1
Ω?
Go to step 4.Repair the open
circuit of harness
between ECM and
the brake vacuum
pump relay con-
nector.
4CHECK HARNESS BETWEEN THE BRAKE
VACUUM PUMP AND BRAKE VACUUM
PUMP RELAY CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the brake vacuum pump con-
nector.
3) Measure the resistance of the harness
between the brake vacuum pump and brake
vacuum pump relay connector.
Connector & terminal
(VC2) No. 5 — (B417) No. 1:
Is the resistance less than 1
Ω?
Go to step 5.Repair the open
circuit of the har-
ness between the
brake vacuum
pump and the
brake vacuum
pump relay con-
nector.
5CHECK ECM.
1) Connect the brake vacuum pump relay.
2) Connect the connectors to the brake vac-
uum pump and ECM.
3) Turn the ignition switch to ON.
4) Measure the voltage between ECM and
chassis ground.
Connector & terminal
(B136) No. 8 — Chassis ground (–):
Is the voltage more than 10 V? Replace the ECM.
<Ref. to
FU(H6DO)-32,
Engine Control
Module (ECM).>
Te m p o r a r y p o o r
contact occurs.

BVC(diag)-29
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
BRAKE VACUUM CONTROL (BVC) (DIAGNOSTICS)
Step Check Yes No
1CHECK BRAKE VACUUM HOSE.
1) Turn the ignition switch to OFF.
2) Check that status of the brake vacuum
hose connection.
Is the brake vacuum hose con-
nected firmly?
Go to step 2.Connect the brake
vacuum hose.
2CHECK BRAKE VACUUM HOSE.
1) Turn the ignition switch to ON and start
engine.
2) Check for leakage from the brake vacuum
hose.
Is there a leak from the brake
vacuum hose?
Replace the brake
vacuum hose.
Go to step 3.
3CHECK BRAKE VACUUM PUMP RELAY.
1) Turn the ignition switch to OFF.
2) Remove the brake vacuum pump relay from
the relay box.
3) Connect the battery to terminals No. 1 and
No. 3 of the brake vacuum pump relay.
4) Measure the resistance between the brake
vacuum pump relay terminals.
Te r m i n a l s
No. 4 — No. 5:
Is the resistance less than 1
Ω?
Go to step 4.Replace the brake
vacuum pump
relay.
4CHECK BRAKE VACUUM PUMP RELAY
POWER SUPPLY.
1) Turn the ignition switch to ON.
2) Measure the voltage between brake vac-
uum pump relay connector and chassis
ground.
Connector & terminal
(VC2) No. 1 (+) — Chassis ground (–):
(VC2) No. 4 (+) — Chassis ground (–):
Is the voltage more than 10 V? Go to step 5.Repair the open or
ground short cir-
cuit of power sup-
ply circuit.
5CHECK HARNESS BETWEEN ECM AND
BRAKE VACUUM PUMP RELAY CONNEC-
TOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector of ECM.
3) Measure the resistance of the harness
between ECM and the brake vacuum pump
relay connector.
Connector & terminal
(B136) No. 8 — (VC2) No. 3:
(B135) No. 25 — (VC2) No. 5:
Is the resistance less than 1
Ω?
Go to step 6.Repair the open
circuit of harness
between ECM and
the brake vacuum
pump relay con-
nector.
6CHECK HARNESS BETWEEN THE BRAKE
VACUUM PUMP AND BRAKE VACUUM
PUMP RELAY CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the brake vacuum pump con-
nector.
3) Measure the resistance of the harness
between the brake vacuum pump and brake
vacuum pump relay connector.
Connector & terminal
(VC2) No. 5 — (B417) No. 1:
Is the resistance less than 1
Ω?
Go to step 7.Repair the open
circuit of the har-
ness between the
brake vacuum
pump and the
brake vacuum
pump relay con-
nector.
7CHECK ECM.
1) Connect the brake vacuum pump relay.
2) Connect the connectors to the brake vac-
uum pump and ECM.
3) Turn the ignition switch to ON.
4) Measure the voltage between ECM and
chassis ground.
Connector & terminal
(B136) No. 8 — Chassis ground (–):
Is the voltage more than 10 V? Replace the ECM.
<Ref. to
FU(H6DO)-32,
Engine Control
Module (ECM).>
Te m p o r a r y p o o r
contact occurs.

DI-34
General Diagnostic Table
DIFFERENTIALS
8. General Diagnostic Table
A: INSPECTION
Symptom or trouble Possible cause Remedy
1. Oil leakage(1) Worn, scratched, or incorrectly seated
front or side oil seal. Scored, battered or
excessively wor n sliding surface of com-
panion flange.
Correct or replace.
(2) Clogged or damaged air breather. Clean, repair or replace.
(3) Loose bolts on differential spindle or
side retainer, or incorrectly fitted O-ring.
Tighten the bolts to specified torque.
Replace the O-ring.
(4) Loose rear cover attaching bolts or
damaged gasket.
Tighten the bolts to specified torque.
Replace gasket and apply liquid gasket.
(5) Loose oil filler or drain plug. Retighten and apply liquid gasket.
(6) Wear, damage or incorrect fitting of
spindle, side retainer or oil seal.
Correct or replace.
2. Seizure
NOTE:Seized or damaged parts should be re-
placed, and also other parts should be thor-
oughly checked for any defect and should
be repaired or replaced as required.
(1) Insufficient backlash for hypoid gear. Readjust or replace.
(2) Excessive preload for side, rear or
front bearing.
Readjust or replace.
(3) Insufficient or improper oil used. Replace seized part and fill with speci-
fied oil to specified level.
3. Damage
NOTE:Damaged parts should be replaced, and
also other parts should be thoroughly
checked for any defect and should be re-
paired or replaced as required.
(1) Improper backlash for hypoid gear. Replace.
(2) Insufficient or excessive preload for
side, rear or front bearing.
Readjust or replace.
(3) Excessive backlash for differential
gear.
Replace gear or thrust washer.
(4) Loose bolts and nuts such as hypoid
driven gear bolt
Retighten.
(5) Damage due to overloading. Replace.
4. Noises when starting or shifting
gears
NOTE:
Noises may be caused by differential as-
sembly, universal joint, wheel bearing, etc.
Find out what is actually making noise be-
fore disassembling.
(1) Excessive backlash for hypoid gear. Readjust.
(2) Excessive backlash for differential
gear.
Replace the differential case assembly.
(3) Insufficient preload for front or rear
bearing.
Readjust.
(4) Loose drive pinion nut. Tighten to the specified torque.
(5) Loose bolts and nuts such as side
bearing retainer attaching bolt.
Tighten to the specified torque.
5. Noises when cornering(1) Damaged differential gear. Replace the differential case assembly.
(2) Excessive wear or damage of thrust
washer.
Replace the differential case assembly.
(3) Broken pinion mate shaft. Replace the differential case assembly.
(4) Seized or damaged side bearing. Replace.
6. Gear Noise
NOTE:
Since noises from engine, muffler, trans-
mission, propeller shaft, wheel bearings,
tires, and body are sometimes mistaken for
noises from differential assembly, be care-
ful in checking them. Inspection methods to
locate noises include coasting, accelerat-
ing, cruising, and jacking-up all four wheels.
Perform these inspections according to the
condition of trouble. When listening to nois-
es, shift gears into four wheel drive and
fourth speed position, trying to pick up only
differential noise.
(1) Improper tooth contact of hypoid gear. Readjust or replace hypoid gear set.
(2) Improper backlash of the hypoid gear. Readjust.
(3) Scored or chipped teeth of hypoid
gear.
Replace hypoid gear set.
(4) Seized hypoid gear. Replace hypoid gear set.
(5) Improper preload for front or rear
bearings.
Readjust.
(6) Seized, cut-away or chipped front or
rear bearing.
Replace.
(7) Seized, cut-away or chipped side
bearing.
Replace.
(8) Differential carrier is vibrating. Replace the differential case assembly.

FS-23
Front Crossmember
FRONT SUSPENSION
8. Front Crossmember
A: REMOVAL
1) Lift-up the vehicle, and then remove the front
wheels.
2) Remove the front exhaust pipe.
3) Remove the front crossmember support plate.
<Ref. to FS-13, REMOVAL, Front Crossmember
Support Plate.>
4) Remove the front stabilizer. <Ref. to FS-14, RE-
MOVAL, Front Stabilizer.>
5) Disconnect the tie-rod end from housing.
6) Remove the front arm. <Ref. to FS-16, REMOV-
AL, Front Arm.>
7) Remove the nuts attaching the engine mount
cushion rubber to crossmember.
8) Remove the steering universal joint.
9) Disconnect the power steering hose from steer-
ing gearbox.
10) Lift the engine approx. 10 mm (0.39 in) using
the chain block.
11) Support the crossmember with a jack, remove
the bolts securing crossmember to body, and then
gradually lower the crossmember with steering
gearbox as a unit.
CAUTION:
When removing the crossmember downward,
be careful that the tie-rod end does not interfere
with drive shaft boot.
B: INSTALLATION
1) Install in the reverse order of removal.
NOTE:
•Use a new bolt and self-locking nut. For parts
which are not reusable, refer to “COMPONENT”.
<Ref. to FS-3, COMPONENT, General Descrip-
tion.>
•Always tighten the stabilizer bushing in the state
where the vehicle is at curb weight and the wheels
are in full contact with the ground.
Tightening torque:
Crossmember to body:
95 N·m (9.7 kgf-m, 70.1 ft-lb)
Engine mounting to Crossmember:
85 N·m (8.7 kgf-m, 62.7 ft-lb)
Front arm to Crossmember:
95 N·m (9.7 kgf-m, 70.1 ft-lb)
Front arm to Support plate:
145 N·m (14.8 kgf-m, 106.9 ft-lb)
Support plate to Body:
150 N·m (15.3 kgf-m, 110.6 ft-lb)
Tie–rod end to housing:
27.0 N·m (2.75 kgf-m, 19.9 ft-lb)
After tightening to the specified torque, tighten the
castle nut further but within 60° until the hole in the
ball stud is aligned with a slot in castle nut
Universal joint:
24 N·m (2.4 kgf-m, 17.4 ft-lb)
Stabilizer clamp
25 N·m (2.5 kgf-m, 18.1 ft-lb)
Stabilizer link:
60 N·m (6.1 kgf-m, 44.3 ft-lb)
Power steering hose to Steering gearbox:
15 N·m (1.5 kgf-m, 11 ft-lb)
2) Purge air from the power steering system.
3) Inspect the wheel alignment and adjust if neces-
sary.
C: INSPECTION
Check the crossmember for wear, damage or
cracks, and then repair or replace if faulty.
FS-00209
FS-00119

PS-2
General Description
POWER ASSISTED SYSTEM (POWER STEERING)
1. General Description
A: SPECIFICATION
Whole system
Minimum turning radius m (ft) 5.7 (18.7)
Steering angleInner wheel 37.0°±1.5°
Outer wheel 32.0°±1.5
Steering wheel diameter mm (in) 375 (14.76)
Lock to lock turn 3.44
Gearbox
Ty p e R a c k a n d P i n i o n , I n t e g r a l
Backlash 0 (Automatic adjusting)
Va l ve ( Po w e r s t e e r i n g s y s t e m ) R o t a r y va l ve
Pump
(Power steering
system)
Ty p e Va n e p u m p
Oil tank Installed on body
Specific outputcm3 (cu in)/rev.9.6 (0.586)
Relief pressurekPa (kg/cm2, psi)8,800 — 9,400 (90 — 96, 1,276 — 1,363)
Hydraulic fluid control Engine RPM sensitive
Hydraulic fluid2(US qt, Imp qt)1,000 rpm: 7.0 (7.4, 6.2)
3,000 rpm: 6.0 (6.3, 5.3)
RPM Range rpm 500 — 8,600
Direction of rotation Clockwise
Hydraulic oil
(Power steering
system)
Description ATF DEXRON III or equivalent
Capacity
2(US qt, Imp qt)
Oil tank 0.2 (0.2, 0.2)
Whole system 0.9 (1.0, 0.8)
Steering wheel Free play mm (in) 17 (0.67)
Steering shaftClearance between the steering wheel and
column covermm (in) 3.0 (0.12)
Steering gear-
box
(Power steering
system)
Sliding resistance N (kgf, lb)
400 (41, 90) or less
Difference between right and left sliding resistance:
Less than 20%
Rack shaft play in
the radial direction
Right–turn steering mm (in) 0.19 (0.0075) or less
Left–turn steering mm (in)Horizontal movement: 0.6 (0.024) or less
Ve r t i c a l m o v e m e n t : 0 . 4 ( 0 . 0 1 6 ) o r l e s s
Input shaft playIn radial direction mm (in) 0.18 (0.0071) or less
In axial direction mm (in) 0.27 (0.0106) or less
Rotation resistance N (kgf, lb)
Maximum allowable value: 10.5 (1.07, 2.36) or less
Difference between right and left sliding resistance:
Less than 20%
Oil Pump
(Power steering
system)
Pulley shaftRadial play mm (in) 0.2 (0.008) or less
Axial play mm (in) 0.6 (0.024) or less
PulleyDitch deflection mm (in) 1.0 (0.039) or less
Rotation resistance N (kgf, lb) 9.22 (0.94, 2.07) or less
Regular pressure (Unloaded)kPa (kg/cm2, psi)981 (10, 142) or less
Steering wheel
effort (Power
steering sys-
tem)
At standstill with engine idling on paved road N (kgf, lb) 29.4 (3.0, 6.6) or less
At standstill with engine stalled on paved
roadN (kgf, lb) 294.2 (30, 66.2) or less

PS-36
Steering Gearbox
POWER ASSISTED SYSTEM (POWER STEERING)
1) Lift-up the vehicle.
2) If a fluid leak is found, clean the fluid completely
from the suspect area, and turn the steering wheel
approx. 30 to 40 times to the left and right from lock
to lock, with the engine running, and check again
for leaks immediately, and also after a few hours
have passed.
3) Cause and solution for oil leakage from “a”
The oil seal is damaged. Replace the valve assem-
bly with a new one.
4) Cause and solution for oil leakage from “b”.
The torsion bar O–ring is damaged. Replace the
valve assembly with a new one.
5) Cause and solution for oil leakage from “c”.
The oil seal is damaged. Replace the valve assem-
bly or oil seal with a new one.
6) Cause and solution for oil leakage from “d”.
The pipe is damaged. Replace the faulty pipe or O-
ring.
7) Cause and solution for oil leakage from “g”.
The hose is damaged. Replace the hose with a
new one.
8) If leak is other than a, b, c, d or g, or if oil is leak-
ing from gearbox, move the right and left boots to-
ward tie-rod end side, respectively, with the
gearbox mounted to the vehicle, and remove fluid
from surrounding portions. Then, turn the steering
wheel from lock to lock about thirty to forty times
with the engine running, and make comparison of
the leaked portion immediately after and several
hours after this operation.
(1) Leakage from “e”
The cylinder seal is damaged. Replace the rack
bushing with a new one.
(2) Leakage from “f”
There are two possible causes. Perform the fol-
lowing step first. Remove the pipe assembly B
from the valve housing, and close the circuit us-
ing ST.
ST 926420000 PLUG
Turn the steering wheel from lock to lock ap-
prox. 30 to 40 times with the engine running,
then inspect the leaked portion immediately af-
ter and several hours after this operation.
•If leakage from “f” is noted again:
The oil seal of pinion & valve assembly is dam-
aged. Replace the pinion & valve assembly with a
new one. Or replace the oil seal and the parts that
are damaged during disassembly with new ones.
•If oil stops leaking from “f”:
The oil seal of rack housing is damaged. Replace
the oil seal and parts that are damaged during dis-
assembly with new ones.
F: ADJUSTMENT
1) Adjust the front toe.
<Ref. to FS-10, FRONT WHEEL TOE–IN, IN-
SPECTION, Wheel Alignment.>
Standard of front toe:
IN 3 — OUT 3 mm (IN 0.12 — OUT 0.12 in)
2) Adjust the steering angle of the wheels.
Specification of steering angle:
3) If the steering wheel spokes are not horizontal
when wheels are set in the straight ahead position,
or error is more than 5° on the periphery of the
steering wheel, correctly re-install the steering
wheel.
4) If the steering wheel spokes are not horizontal
with vehicle set in the straight ahead position after
this adjustment, correct it by turning the right and
left tie–rods in the opposite direction from each oth-
er by the same angle.
(1) Lock nut
Inner wheel 37.0°±1.5°
Outer wheel 32.0°±1.5°
(1) Within 5°
PS-00107
PS-00513
(1)

PS-38
Pipe Assembly
POWER ASSISTED SYSTEM (POWER STEERING)
7) Disconnect the suction hose and pressure hose
from oil pump.
8) Disconnect the suction hose and return hose
from the reservoir tank.
9) Remove the oil cooler pipe.
10) Remove the hose bracket and take out the
hose assembly from vehicle.
B: INSTALLATION
1) Install in the reverse order of removal.
Tightening torque:
<Ref. to PS-4, POWER ASSISTED SYSTEM,
COMPONENT, General Description.>
2) Fill with the specified fluid.
CAUTION:
Never start the engine before feeding the fluid
otherwise the vane pump might be seized.
3) Finally, check the clearance between pipes or
hoses as shown in the figure indicated in “General
Diagnostic Table”. <Ref. to PS-53, INSPECTION
OF CLEARANCE, INSPECTION, General Diag-
nostic Table.>
(1) Suction hose
(2) Pressure hose
(1) Reservoir tank
(2) Suction hose
(3) Return hose
PS-00736
(1)
(2)
PS-00737(3)
(2)
(1)
(1) Hose ASSY
(2) Hose bracket
PS-00738
PS-00739
(2)
(1)

PS-39
Pipe Assembly
POWER ASSISTED SYSTEM (POWER STEERING)
C: INSPECTION
Check all disassembled parts for wear, damage or other problems. Repair or replace the defective parts as
necessary.
CAUTION:
Although the surface layer materials of rubber hoses have excellent weathering resistance, heat re-
sistance and resistance for low temperature brittleness, they are likely to be damaged chemically by
brake fluid, battery electrolyte, engine oil and automatic transmission fluid and their service lives are
to be very shortened. Wipe off hoses immediately if any of these come into contact with the hoses.
Since resistances for heat or low temperature brittleness are gradually declining according to time
accumulation of hot or cold conditions for the hoses and their service lives are shortening accord-
ingly, it is necessary to perform careful inspection frequently when the vehicle is used in hot weather
areas, cold weather areas and a driving condition in which many steering operations are required in
short time.
Particularly continuous work of relief valve over 5 seconds causes to reduce service lives of the hos-
es, the oil pump, the fluid, etc. due to over heat.
Par t Maintenance par ts Corrective action
Pipe
•O–ring fitting surface damage
•Nut damage
•Pipe damage
Replace with a new part.
Clamp • Loose clamps Replace with a new part.
Hose
•Flare surface damage
•Flare nut damage
•Outer surface cracks
•Outer surface wear
•Clip damage
•End coupling or adapter for deformation
Replace with a new part.
Tr o u b l e P o s s i b l e c a u s e C o r r e c t i v e a c t i o n
Pressure hose burst
Excessive holding time of relief status Instruct customers.
Malfunction of the relief valve Replace the oil pump.
Poor cold character istic of fluid R eplace fluid.
Disconnection of the return
hose
Improper connection Repair.
Loosening of the clip Retighten.
Poor cold character istic of fluid R eplace fluid.
Fluid slightly leaking out of
hose
Wrong layout, tensioned Replace the hose.
Excessive play of engine due to deterioration of
engine mounting rubberReplace the parts if defective.
Improper stop position of pitching stopper Replace the parts if defective.
Crack on hose
Excessive holding time of relief statusReplace.
Instruct customers.
Excessive tightening torque for return hose clip Replace.
Power steer ing fluid, engine oil, electrolyte adhere
on the hose surface
Replace.
Be careful during service work.
To o m a n y u s e s i n e x t r e m e l y c o l d w e a t h e rReplace.
Instruct customers.