Page 189 of 1413

@ ne-oving the radiator cap while the engine
is hot can cause the engine coolant to splay out, seri-
ously scalding you. Always let the engine and radiatol
cool down betore removing the radiator cap.
CAUTION: When poudng engine coolant, be sure to shut
the relay box lid and not to let coolant spill on the elec-
tlical pans or the paint. ll any coolant spills, rinse it otf
immediately.
1. Slide the heater temperature control lever to maxi-
mum heat.
Make sure the engine and radiator are cool to the
touch.
2. Remove the radiator cao.
3. Loosen the drain plug on the bottom of the radiator,
and remove the drain bolt from the enoine block. Let
the coolant drain out.
ENGINE DRAIN BOLT78 N.m {8,O kgt.m, 58 lbt.ftlApply liquid gasker tobolt thread when installing.WASHERReplace.
5.
Remove the reservoir from its holder by pulling it
straight up. Drain the coolant, then put the reservoir
back in its holder.
When the coolant stops draining, apply liquid gasket
to the drain bolt threads, then reinstallthe bolt with
a new washer. Tighten it securely
6. Tighten the radiator drain plug securely.
7. Mix the recommended antifreeze/coolant with an
equal amount of water in a clean container.
NOTE:
. Use only HONDA-RECOMMENOED antifreeze/
coolant.
a For best corrosion protection, the engine coolant
concentrations must be maintained year-round at
50% MINIMUM. Coolant concentrations less than
50% may not provide sufficient protection
against corrosion or freezing.
CAUTION:
a Do not mix ditterent blands ot anti-freeze/
coolants.
a Do not use additional rust inhibitois or anti-rust
products; they may not bs compatibl€ with the
recommgndsd engins coolant.
Engin€ Coolant Retill Capacity: including reservoir
{0.6 t (0.6 US qt, 0.5 lmp qt)).
81881 engine:
MlTt 4.4 | (4.6 US qt, 3.9 lmp qr)
Afft 4.7 [ (5.O US qt,4.1 lmp qt]
Bl8Cl engine:
Mnt 4.7 | (5.0 US qt.4.1 lmp qt)
8. Pour coolant into the radiator up to the base of the
filler neck.
9. Loosen the bleed bolt on top of the engine. Tighten
it again when coolant comes out in a steady stream
with no bubbles.
BLEED BOLT
1O. Refill the radiator to the base of the tiller neck. Put
the cap on the radiator. and tighten it only to the tirst
stop, Stan the engine and let it run until it warms
up (the radiator cooling fan comes on at leasttwice).
11. Turn oft the engine. Check the level in the radiator,
and add coolant it needed. Install the radiator caD,
and tighten it fully.
'1 2. Fill thereservoirto the MAX mark. lnstallthe reser-
voir cap.
9.8 N.m (1.O kgl.m, 7.2 lbf.ftl
Engine Coolant Refilling and Bleeding
10-5
Page 193 of 1413
Inspection
Remove the timing belt (81881 engine: see page
6-1O, B18C1 engine: see page 6-49).
Check that the water pump pulley turns counter-
clockwise,
Check for signs ol seal leakage.
NOTE: A small amount ot "weeping" from the
bleed holo is normal,
BLEED HOLE
2.
J.
J.
Replacement
6 r 1.O rnm12 N.m {1.2 kgf.m,4.7 bf.ftl
4. lnstall the water pump in the reverse order
removat.
NOTE:
a Keep the O-ring in position when installing.
a Clean the spilled engine coolant.
Remove the timing belt (818B1 engine: see page
6-10,818C1 engine: see page 6-49).
Remove the camshaft pulleys and the back cover(81881 engine: see page 6-19. B18C1 engine: see
page 6-581.
Remove the water pump by removing five bolts,
NOTE: Inspect, repair and clean the O-ring groove
and mating su.lace with the cylinder block.
DOWEL PIN
BI-EED HOI-E
10-9
Page 258 of 1413

PGM-FI System
Vehicle Speed Sensor (VSS)
- _-_f_-., \-=1_ -
It6l- -l tl l- The Maltuncrion Indicator Lamp (MtL)' ths Vehiclo SD6sd (VSS) circuit.
indicateE Diagnostic Trouble Code IDTC) 17: A problem in
a25 {-t
The VSS generates a pulsing signal when the front wheels turn.
@4""rr.r whadr b.lor.
l.d.lnC up tront olcat,
NOTE: Transmission in llj position lA/Tl.
- Tha mll hs b..n ltgortld o.r.* Yvlrh th. Sc]S $o.r coi[cto.connast.d l... ploa I l -341,
cod! 17 i. Indlc.i.d.
Do the ECM Basot Procodur6 16€€pag€ I I -351.
Road rosr whh A/T in13 positaon
{M/T: in 2nd O6ar), accol6rat6 to4,OOO rpm, thon d6c6l6,ate to1,5OO .pm with th.ottlo fullyclosod tor at loast 5 s6conds.
Int rmltllrt t llur., .yrtam b O|(.t drlr drr.Chcct lor poor conicctlon! oalootc wl... !t C3O5 0ocrtad rtLtt rhod. torr.l, eA24. C112IVSA) .nd ECil.
ls th6 MIL on and doos it indic.t6code 'l7 ?
Block roar whe€19 and 5st th6parking brsko. Jsck up th€ f.ontof the c6. and support with saf€-iy standa.
Turn the ignition Bwitch OFF.
Connect tho t€st hamos3 b€tw€€ntho ECM ond connoctora {as€pag6 11-37).
Tu.n th€ ignitioh switch ON.
Block the .ight lront whoel andalowly rctato loft tront wh6ol andm6asur6 voltago b€twoon BlO{+) torminal and A26 l-}terminal.
Doss voltago puleo O V and10 v?Tu.n th€ ignition switch OFF.
Sub|tllul. ! knosn{ood ECMlnd r!ch.ck. lt .Vmgiom/lndlc.-tlon g@.. .w.y, r.pLca di. orlgl-n.l ECM.
ato l+l
0- 10 V ?
11-68
lTo p6ge 1 1-691
llEur
Page 259 of 1413
Disconnect the "B" connectorfrom the ECM only, not the mainwile hatness.
Turn the ignition switch ON.
Block tho right front who€l andslowlv rotate l6ft front wheel andm€asure voltage between 8'l Ol+) terminal and A26 (-)
terminal.- Roo.ir lhort in ORt{wire belween ECM18101 tnd rhs VSSor cruia6 controlunit.- ncp.i. op€n in ORI{wira botwoan ECM(8101 and the vSS.- It wir. i! OK, totttho vSS. lsoc aec-tion 231
Doos voltage pulso O V and'to v?
SubrtituL . known-good ECil lndEch.ck. fi lynptom/ndcltbn gp..
rw!y, .rpleco lh. original ECM.
(From page 1 1-68)
1 1-69
Page 307 of 1413

Intake Air System
Throttle cable [81881 enginel
1 1-1 18
Inspection/Adiustment
'I . Start the engine. Hold the engine at 3,000 rpm with
no load (A/T in $ or@ oosition, M/T in neutral) until
the radiator fan comes on, then let it idle.
2. Check that the throttle cable operates smoothly with
no binding or sticking. Repair as necessary.
3. Check cable free play at the throttle linkage. Cable
deflection should be 1O-12 mm (O.39-O.47 in.)
DEFLECTION1O- 12 mm1O.39-0.47 in.l
4.lf deflection is not within specs, loosen the locknut
and turn the adjusting nut until the deflection is as
specifled.
With the cable properly adjusted. check the throttle
valve to be sure it opens fully when you push the
accelerator pedal to the floor. Also check the throt-
tle valve to be sure it returns to the idle oosition
whenever you release the accelerator pedal.
Installation
1. Fully open the throttle valve. then install the throt-tle cable in the throttle linkage and install the cablehousing in the cable bracket.
2. Start the engine. Hold the engine at 3,OOO rpm withno load (A/T in S or @ position, M/T in neutrall untilthe radiator tan comes on, then let it idle.
THBOTTLE LII{KCABLEARACKET
i;
-l-r
,)
j
5.
LOCKNUTITINER CABLE
Hold the cable sheath, removing all slack from the
cable.
Turn the adjusting nut until it is 3 mm (O. 12 in.) away
trom the cable bracket.
Tighten the locknut. The cable deflection should now
be 10- 1 2 mm (O.39 -O.47 in.). lf not, see Inspec-
tion/Adjustment.
3 mm {0.12 in)
LOCKNUT1O N.m{1.O kgl.m,7 tbt.ft)
Page 308 of 1413

Throttle cable [B18C1 enginel
Inspection/Adiustment
1 . Start the engine. Hold the engine at 3,O0O lpm with
no load in neutral until the radiator fan comes on,
then let it idle.
2. Check that the throttl€ cable operates smoothly with
no binding or sticking. Repair as necessary.
3. Check csble free play at the throttle linkage, Cable
deflection should be 10-12 mm (O.39-O.47 in.)
DEFLECTIOI{10-12 mm(O.39-O.47 in.l
lf deflection is not within sDecs, loosen the locknut
and turn the adjusting nut until the deflection is as
specitied.
With the cable properly adjusted, check the throttle
valve to be sure it opens fully when you push the
accelerator Dedal to the tloor. Also check the throt-
tle valve to be sure it retums to the idle position
whenever vou release the accel€rator pedal.
CABLE BBACKET
ADJUSTING I{UT
lnstallation
1. Fullv open the throttle valve, then install the throt-
tle cable in the throttle linkage and install th€ cable
housing in the cable bracket.
2. Stan the engine. Hold the engine at 3,OOO rpm with
no load in neutral until the radiator fan comes on,
then let it idle.
THROTTLE LI K
With part A of the cabl€ bracket, support the cable
sheath so that there is no inner wire free play. Turn
the adjusting nut until it touches part A, leaving a
gap between the locknut and adiusting nul.
Move the cable sheath to psrt B of the cable brack-
et that so the bracket slides into the gap between
the locknut and adiusting nut. Tighten the locknul.
LOCKT{UTlO t{.m (t.O kgl.m, pART B
5.
4.
7 lbt.ftl{Locked by bracket)ADJUSTING NUT
PABT A
LOCKNUTNO GAP
AIUUSTINGNUT
5, The cable deflection should now be 10-12 mm
{O.39-O.47 in.). lf not, see Inspection/Adiustmsnt
11-119
Page 313 of 1413
Intake
Intake
Air
Air
System
Bypass (lAB) ControlSystem tBl8C1 enginel (cont'dl
Troublcahooting
VACUUII PUMP/GAUG€A973X-041-XXXXX
fromwiro haanasid€
PI{K/BLU I-I
YEI/aLK l+l
tA8 COI{TROLDIAPHRAGM
Insp€ction of IAB Conltol Sytt.m
Start engino and allow to idle.
R€move # 13 vacuum hose tromthe IAB control diaph.agm andconnect vacuum gauge to thehose.
R€move # 12 vacuum hose fromth€ IAB vacuum tank, then checktor vaccum at the IAB vacuumtank.
Rcplir lh. block.g. otvacuufi laak boiwaaotha IAB vacuum tanklnd th. intlk m!ni-fold.
Disconnect the 2P conn€ctor lromthe IAB control solenoid valve.
Measure voltage betweenYEL/BLK (+l torminal andPNK/8LU l-) terminsl.
ls thoro battery voltage?
Measure voltage b€twee nBLK^|/EL (+) torminal and bodyground.
IAB CONTBOLSOLENOID VALVE
Page 328 of 1413
(F.om pdge 1l-138)
Connoct a vlcuum gaugo tocaniator purg! lir ho!o.
Stsn tho onginc lnd rai!. spo€dto 3,50O rpm.
Connect a vacuum gauge to thecsnister puag6 hos6 and raise thesngin€ spe€d to 3,500 rpm.
Do€a vocuum opp€ar on gougo
within 'l minuto?
Saa EVAP tso {ay vdv. t.!t ioconrDbta.Evapoardva ambdon coartaoL |.|ox.
Inapoct tha purga hosoand drronl. body potl
for pinch or blocklga.
VACUUM PRESSUREGAUGE O-4 In.HgoTJAZ-OOIOOOB
PURGE AIR HOSE
(cont'd)
11-139