Page 121 of 800

EMISSION CONTROL
ENGINE AND EMISSION CONTROL17-15
EGR SYSTEM CHECK
M1173002600348
AK300780AB
<4G1>
EGR valve
Green stripe
Three-way
terminal
AK300781AB
<4G6>
EGR valve
Green stripe
Three-way
terminal
1.Disco nnect the vacu um ho se (Green stripe) from
th e EGR valve, a nd th en connect a hand vacuum
pu mp via t he thre e-way te rmin al.
2.Wh en the engine is hot o r cold, check the
condition of va cuum by racing the engine.
When engine is c o ld
(Eng ine coo lant tem perature: 20°C or less)
Throttle valveNormal vacuum co ndition
Open quicklyNo va cuum will gene rate (th e
same as baro
m etric pre s sure.)
When engine is h o t
(Eng ine coo lant tem perature: 80°C or higher)
Throttle valveNormal vacuum c ondition
Open quicklyIt will mo me nt a r i l y rise o v er 13
kPa
3.Disco nnect the th ree-way t e rminal.
AK300782AB
<4G1>
EGR valve
Green stripe
AK300783AB
<4G6>
EGR valve
Green stripe
4.Conn ect the han d va cuum pump to t he EGR
valve nipple.
5.Check whe t her th e engine st alls or the idling is
u n st able when a vacuum of 30 kPa or h i gher is
a pplied during idling.
EGR V A L V E CHECKM1173 0028 0022 3
1.Remove the EGR valve an d inspect for stickin g ,
carbon deposit s, e t c. If found , clean with a
suit able so lve n t so that th e va lve seat s corre ctly .
2.Conn ect a hand vacuum pump to the EGR va lve .
3.App l y 6 7 kPa of va cuum, and check t hat the
vacu um is maint a ined.
AKX00348
4.App l y a vacuum and chec k th e p a ssage of air by
b l owing throug h one side of the EGR p a ssage.
VacuumPassage of air
5.3 kPa or lessAir is not blown out
27 kPa or moreAir is blown out
Page 122 of 800

EMISSION CONTROL
ENGINE AND EMISSION CONTROL17-16
5. Replace the gasket, and tighten to the specified torque.
Tightening torque:
<4G1> 21 ± 4 N⋅m
<4G6> 20 ± 2 N⋅m
EGR PORT VACUUM CHECK <4G1>M1173002900167
AK300784AB
Green strip
1.Disco nnect the vacu um ho se (Green stripe) from
th e t h ro tt le b o d y EGR va cuu m ni pp le an d co nn ec t
a hand vacu um p u mp to the nipple.
2.Plu g the vacuum hose (Gree n stripe).
AK201224AB
Vac-
uum
Engine speed (r/min)
3.S t art the engin e and check t hat, af ter ra ising th e
engine spe ed by ra cin g the e ngine, p u rge vacuu m
raises according to engine speed.
NOTE: If ther e is a prob lem with change in vac-
uum, the t h rottle bod y p u rge port may be clo gged
an
d requ ire clean ing.
EGR PORT VA CUUM CHECK <4G6>M1173 0029 0015 6
AK300786AB
White stripe
1.Disco nnect the vacu um h o se (W hite strip e ) from
th e t h ro tt le b o d y EGR va cuu m ni pp le an d co nn ec t
a hand vacuum p u mp to the nipple.
2.Plug the vacuum hose (White stripe).
AK100011AC
Vac-
uum
Engine speed (r/min)
3.S t art the engine.
4.Check that a fairly const a nt n egative is gene rated
re gardle s s of the engine sp eed.
5.If no neg ative pressur e is genera t ed, th e port is
p r obably blocked an d sh ould be cleane d.
EGR CONTROL SOLENOID VA L V E
CHECK <
4 G1 >
M1173 0031 0023 8
NOTE: Whe n discon nect i ng th e va cuum hose,
always make a mark so th at it can be reconnected at
original p o sition.
AKX00351
A
B
AE
Battery
1. Disco nnect the vacu um h o se f r om th e solenoid
valve.
2.Disco nnect the ha rness connector .
3.Con nect a ha nd vacu um pump to nipp le (A) of the
solen o id valve (ref e r to th e ill ust r ation at le f t ).
4.Check a i r tightness b y ap plying a vacuum with
volt age applied d i rectly from t he batt e ry to the
EGR cont rol solen o id valve and withou t applyin g
volt age .
Battery voltageNormal condition
AppliedVa c u u m l e a k s
Not appliedVacuum maintained
Page 123 of 800

AKX00352
EMISSI ON CONTROL
ENGINE AND E M ISSION CON T R O L17-17
5.Measure the resist ance between the te rmin als of
th e solenoid va lve .
St andard va lue: 29 − 35 Ω (at 20°C)
EGR CONTROL SOLENOID V A L V E
CHECK <
4 G6>
M1173 0031 0024 9
NOTE: Whe n discon nect i ng th e va cuum hose,
always
make a mark so th at it can be reconnected at
original p o sition.
AK201251AB
A
B
C
Battery
1.Disco nnect the vacu um h o se f r om th e solenoid
valve.
2.Disco nnect the ha rness connector .
3.Con nect a ha nd vacu um pump to nipp le (A) of the
solen o id valve (ref e r to th e ill ust r ation at le f t ).
4.Check a i r tightness b y ap plying a vacuum with
volt age applied d i rectly from t he batt e ry to the
EGR cont rol solen o id valve and withou t applyin g
volt age .
Battery
voltageB nipple
conditionNormal condition
Not appliedOpenVacuum
maintained
AppliedOpenVacuum leaks
ClosedVacuum
maintained
AK100016
5.Measure the resist ance betwee n the te rminals of
th e so lenoid valve .
St andard va lue: 29 − 35 Ω (at 20°C)
Page 136 of 800

SPECIAL TOOLS
FRONT AXLE26-4
SPECIAL TOOLS
M1261000600773
ToolNumberNameUse
B990767
MB990767Fr o n t hu b a n d en d
yoke holderFixing of the h u b
MB991618
MB991618Hub bolt remo verRemoval of the h ub bolt
AC106827
MB991897 or
MB992
01 1Ball j o int remo verKnuckle and tie rod e nd ball joint
discon
nection
NOTE: St eering linkage pu lle r
(MB990 635 or MB991 1 13)is also u s ed
to disconnect kn uckle an d tie rod en d
bal
l j
o
int.
MB990241AB
A BMB990241
A: MB9902 42
B: MB990244
Axle shaft pu ller
A: Puller shaf t
B: Puller bar
Rem o va l of t h e dri v es h a f t
MB991354
MB991354Pulle r body
MB991 056 or
MB991
355Knuckle a r m
bridg
e•Removal of the hu b
•Removal of the whee l bea ring
AC100320 ABA
B
C
A: MB9910 17
B: MB990998
C: MB99100 0
A, B: Fr ont hu b
remover and
ins t all e r
C: Sp acer
•Removal of the hu b
•Prov ision a l ho ldin g of th e wheel
b
earin g
•Measurement of hub st a r ting t o rque
•Measurement of wh eel b earin g axial
pl
a y
NOTE: MB9 91000, which b e lon g s to
MB9909 98, should be used a s a
sp
acer
.
Page 139 of 800

ON-VEHICLE SERVICE
FRONT AXLE26-7
ON-VEHICLE SERVICE
WHEEL BEARING AXIAL PLAY CHECKM1261000900224
1. Remove the caliper assembly and suspend it with a wire.
2. Remove the brake disc from the front hub.
AC209503 AC
3.
Att a ch a dial ga uge a s sh own in the illustration,
an d th en measure the axial play while moving the
hu b in the axial dire ctio n.
Limit: 0.05 mm
4.If axial play e x ceeds t he limit, disassemble the
fro n t hub assemb ly a nd check the p a rt s.
5.In st all the bra k e d i sc, ca lipe r assembly and
tighten th e caliper assemb ly mount ing bolt s to the
specifie d torqu e 100
± 10 N⋅m.
HUB BOL T REPLACEMENTM12610010 0029 1
1.Remove the ca lip er assembly a nd suspe nd it wit h
wire so t hat it does not fa ll.
2.Remove the bra k e d i sc.
AC302114
MB991618
AD
Hub bolt
3.Use spe c ia l too l hub bolt remover (MB99161 8) to
re move the h ub bo lt s.
AC104588
MB990767
Plain
washer
AC
4. In st all the plain wa sher to the n e w hub b o lt, a nd
inst all the bolt with a nu t while hold i ng the hub
wit h spe c ia l too l fron t hub a nd end yoke holder
(MB99076 7).
5.In st all the bra k e d i sc, ca lip er assembly and
tighten th e caliper assembly mount ing bolt s to the
specifie d torqu e 100
± 10 N⋅m.
Page 140 of 800
Page 141 of 800
Page 145 of 800

AC100136
MB990685MB990326
AB
FRONT AXLE HUB ASSEMBL Y
FRONT AXLE26-13
3.Measure the hub st a r ting torque b y using the
fo llowing special to ols.
•To rque wren ch (MB99068 5)
•Preload socket (MB9 90326 )
Limit: 1.8 N⋅m
4.Th e st arting torq ue must b e within the limit an d
th e hub rot a tion must be smoo th.
>>C<< WH EEL BEARING AXIAL PLA Y
CHECK
AC100137
MB991000
MB991017
245 ± 29 N·m AB
Tighten the nut
with the bolt
secured
1.
Measure to d e termine whe t her th e wheel bearing
a x ial pla y is with in the limit o r not by using t he
fo llowing special to ols.
•Front hub re mover and inst a ller (MB9910 17)
•Sp a c er (MB9910 00)
Limit: 0.05 mm
2. If the play is not wit h in the limit rang e while the nut
is tighten ed to 2 45
± 29 N⋅m, the bearing, hu b
a
nd/or knuckle
have
proba
bly not be en in st alled
correctly
. Replace
the be
aring and re -inst a ll.
INSPECTION
M12610020 0007 8
•Check the fro n t hu b and brake disc mo untin g sur-
faces for gallin g and cont amination.
•Check the knu c kle in ner surface for ga lling an d
crac
ks .