throttle body HONDA INTEGRA 1994 4.G Workshop Manual

- Automatic TransmissionSection 14Unit of length: mm (in)
[t!'tttltttt tt -
MEASUREMENT
STANDAND INEWI
Wir. Di..o.D.Fr.. L.ngtht{o. of Colh
SpringsRegulator valve spring ARegulator valve spring IStator r€action springModulator valv€ bodyTorque convorter check valve
Cooier ch€ck valve sprangRelief v6lvo spring2-3 orifice control valvo springThrottle valve B adiusting sPring
Throttle valve B springThrottle valvo B 6pringThrottle valve I spring1-2 shift valve sprang2-3 shift valve spring3-4 shift valve spring'lst-hold accumulator spring1st accumulator sprang2nd accumulalor spdng3rd accumulator spring4th accumulator sPrangLock-up shift valve springLock-up timing B valve springLock-up control valve springCPC valve springKick-down valvo spring3-2 kick-down valvo springServo control valve spring4th exhaust v6lve springServo orifice controlvalve spring
1.8 {0.071}1.8 (0.071)
5.5 (0.217)
1.3 {0.0s1)1.1 {0.043}1.1 {0.043)1.r (0.043)
0.9 (0.035)
0.7 (0.0281
1.4 (0.055)
1.4 (0.055)
1.1(0.055)0.9 (0.0351
0.9 (0.0351
0.9 {0.035)4.0 {0.157)2.5 (0.098)
3.6 (0.142)
2.8 (0.1r0)
2.6 (0.102)
0.9 (0.035t
0.8 (0.0311
0.8 (0.031)
1.3 (0.051)
1.0 (0.039t
1.3 (0.051)
0.9 {0.035)1.0 (0.039)
0.8 (0.031)
14.7 (0.579)
9.6 (0.378)
26.4 (1.039)
9.4 {0.370}8.4 (0.331)
8.4 (0.3:]t)
8.6 (0.3l9)
6.6 (0.2601
6.2 (0.244)
8.5 (0.335)
8.5 (0.335)
8.5 (0.335)
8.6 (0.339)
7.6 (0.299)
7.6 (0.2991
21.5 (0.846t
16.3 (0.642)
22.0 (0.866)
17.5 (0.689)
16.3 (0.642)
7.6 {0.299)6.6 {0.260}6.6 (0.260)
9.4 (0.370)
6.6 (0.260)
8.6 (0.339)
6.4 (0.252)
7.1 (0.280)
6.6 (0.260)
88.6 (3.488)
11.011.732130.3 (1.193)
37.3 {1.469)33.8 (1.331)
33.8 (1.331)
37.1 (1.461t
33.0 (1.299)
34.0 fi.339)41.5 (1.634)
41.5 (1.63i1)
41.6 {1.638}40.4 (1.591)
57 ,0 12.211152.0 (2.047)
71.1 Q.A23l't05.4 (4.150)
108.9 (4.287)
105.2 (4.'142)
103.3 {4.067)73.7 12.902160.8 (2.394)
39.5 (1.5s5)
35.3 (1.390)
2a.5 (.1221
45.6 (1.795t
34.1 {1.343)60.3 (2.374)
48.2 {1.898}
16.5
2.112.1't2,5
12.513.414.9
10.511.212.114.5
26.8E.316 + 8.615.219.'l21.232.022.125.O12.111.717.011.518.533.0
-r
3-13

Intake Manifold
Replacement
NOTE: Use new O-rings and gaskets when reassembling.
CAUTION: Check for tolds or scratches on the aurface ot the gasket. Roplace with a now gasket it damagod,
81881 engine:
5r0.8mm6 N'm {0.6 kgl.m.4 rbr.ftlINTAKE AIRTEMPERATUREIIATI SENSOR
'*o*ot'u""'""N
5xO.8mm6 .m (0.6 kg{.m.4 tbf.ftl
O-RINGReplace.
IiITAKE MANIFOLDReplace iI cracked orit mating s!rtaces arodamag€o.
PURGE CONTROLSOLENOID VALVE
8 x 1.25 mm22 N.r 12.2 kgl.m,'16 tbt.ftt
IDLE AIR
GASKETSReplace.
I x 1.25 mm20 N.m (2.0 kgt.m.14 rbf.ftl
O.RINGReplace.{IACI VALVEBe careful notto damage.THROTTLE
8 x 1.25 mm
BODY
O-RINGSBeplace.
24 N.m (2.4 kgf'm,17 rbf.ft)
8 x 1.25 mm23 N.m (2.3 kgl.m,17 lbf.frl
BRACKET"o
aYc
g
/
1.25 mmN.m (2.4 kgl'm,rbf'ft1
8x2417
8 x 1.25 mm24 N.m (2.4 kgl'm.17 tbr.ftlTHERMOVALVE8e careful not todamage.
9-2

NOTE: Use new O-rings and gaskets when reassembling.
CAUTION: Chock for folds 01 scratches on th6 surfac6 of tho gaskot. Replace wilh a new gasket if damaged.
818C1 engino:
INTAKE MANIFOLDReplace il cracked oril mating surfaces are
5 x O.8 rnm6 N.m 10.6 kgl.m,4 tbt.ttl
lI
{,/
?,/
EVAP PURGE CONTROLVALVEdamageo.
IAT SENSOR
5xO.8mm6 N.m 10.6 kgf.m,4 tbf.ftl
INTAKE AIRBYPASS VALVE
IAC VALVEBe carelul notlo oamage.
O.RINGSReplace.
GASKETSReplace.
O.BI GReplace.
BODY
INTAKE MANIFOLDCHAMBER
8 x 1.25 mm23 N.rn 12.3 kgt'm,17 tbf.frl
I x 1.25 mm22 N.m 12.2 kgl.ft,t6 tbt.tt)
BRACKET
8 r 1.25 mm24 N.m {2.4 kgf.h,t7 rbr.ftl
8 x t.25 mfi24 N.m (2.4 lgf.m.17 tbt.ft)I r 1.25 lnm24 N.m 12.4 kgt.m,17 tbt.ftl
8 x 1.25 mm20 .m (2.0 kgt.m,14 tbf.ftl
THROTTLEAODY
FAST IDL€ THERMO VALVEBe carelul not to damage.
HEATER BYPASSPIPE
o-Rt GsReplace.
I x 1.25 mm24 N.m (2.4 kgl.m, 17lbf'ft|
9-3

AIR CLEAI{ER IACL)Replacoment,11-117
THROTTLE BODY (T8I
Inspsction, page 1 1-120Disassembfy, page 11'122THROTTLE CABLEInsDection/Adjustment, pages 1 l-'l 18, 1 19
Inslallation, pages 1 1-1 18, 119
POSITIVE CRA KCASEvEt{TtLATtOt{ (PcVl VALVEInspection, psgo 1 l-134
INTAKEAIREYPASS IIABIco TnoLSOLENOIDVALVE (B18Cl .ngino onlylTroubl6shooting,page 1 1-124
INTAKEAIRBYPASS (IABI
co TROLOIAPHRAGM{Bl8C1 ongino onlylTroubleshooting,page 11-124
I
RESONATOR
ENGI]TE CONTROL MODULE {ECM)Selt-diagnostic Procedures, page 1 1-34Troubfeshooting, page 1 1 -42
MAIN RELAYRelay Testing, page 1 1- 111Troubleshooting, pag€ 1 1-112SERVICE CHECX CONNECTOR (2PI
56ll.diagnostic Procedures, page'l 1-34
11-5

.:-\.-----ll@l--l t l- The Malfunction Indicator Lamp (MtL) indicatee Diagnostic Trouble Cod€ (DTC) 7: A problcm inrhe Thronle Position (TPl Sonsor circuit.The TP Sensor is a potsntiometer, lt is connected to the throttle valve shaft. A8 the throttlo position chan96, the throttlopositaon sensor varies the voltage signal to the ECM.
BBUSHHOLDER
PGM-FI System
Throttle Position (TPl Sensor
OUTPUT VOLTAGE IV)
BNUSH
RESISTOF
IXNOTTII
TERMIIIAL;0rr- of€ no
THNOTTIE
YEL/aLU l+l TP SEITSOR
I
a
t
t
Io.|o
RED/BLK {-I
cnn/BLu I - l
)ran1 )ril-Y- -?..
- Th. MIL h.. baln rlport d on.- With th. SCS thort conn.ciolconn.c-ted (rco pngc 11-341.codo 7 i. indlc.t d.
Do the ECM Reset hocedure (se€page l 'l-35).
l. ..mrtt nt fClur., lyrt m la OX.t thb dm. ll.at drlv. rn.y brncoaataryl.Chack lor poo? connactlo|ra otloora wlr.r !t C223 lloc.t d !tdgtn drod( tow..t, Cl15 ITP ...t-rorl, C419 (TCMI .nd ECM.
ls the MIL on and do€s itindicats codo 7?
Turn th€ ignition switch OFF.
Disconnect tho 3P connector lromth€ TP sensor.
Turn the ignition switch ON.
Meosu.o voltage betwoon YEL/BLU (i ) terminal and GRN/BLUI -, torminal.
Measurs voltagG betw66n YEUBLU (+l terminal and bodygiound.ls there approx. 5 V?
(To page 1 1-611
11-60
(To page 1 1-6'l )
,,,----

ldle Control System
ldle Air Control (lACl Valve
lt6l- -l lf l- The Maltunction Indicator Lamp (MlL) indicates Diagnostic Trouble Code {DTC} 14: A problem in
' '- the ldle Air Control llAC) Valve circuit.
The IAC Valve changes the amount of air bypasEing the throttle body in respons€ to a current signal from the ECM in
order to maintain the proper idle speed.
ffi: r;611/ | /--T-\
- The MIL h.3 been report don,- With tho SCS shon connoctolconnoctod (soo pago 'l 'l -341,
cod6 14 is indicatod.
Do the ECM Reset Procedure (seepage 11-35).
With the engine running snd theaccelerator pedal releas€d, dis-conn€ct th€ 2P connector frorttho IAC valvo.
ls the MIL on and does it indicatecode 14?
htarmitlaot frlu]., aya-t.m i. OK !t thir tlft.
ll.rl drlv. mly ba nac-aaaaryl.Chack tor Doo. conn€c-tlonr oi loora wirca atC3O5 (loc.t.d .t |.ftlhock tow.tl, C424,Cl tB (lAC v.lvol .ndECM.
Disconnect the 2P connector fromthe IAC valve.
Sub.iituto . known{ood IACvdva lnd iotolt.
{To page 11-83}
11-82

ldle Control System
Fast ldle Thermo Valve
DEscliptlon
To prevent erratic running when the engine is warming
up, it is n€cessary to raise the idle speed. The fast idle
thermo valve is controlled by a thermowax plunger, When
the engine is cold. the engine coolant su.rounding the
thermowax contracts the plunger, allowing additional air
to be bypassed into the intake manifold so that the en-
gine idlss taster. When the engine reaches operating tem-
peratur€, the valve closss, reducing the amount of air
bypassing into the manifold.
FAST IDLE THERMOVALVE
AIN EYPASS VALVE
Inspaction
NOTE: The tast idle thermo valve is factory adiustsd;
it should not be disassombl€d.
1. Remove the intake air duct from the throttlg body.
2. Stan the engine.
3. Put your finger over ths lower port in throttle body
and make sure that there is 8ir flow with tho engine
cold (engine coolant temperatute below 86oF,
300c).
a lf not,
retest.
leplace the fast idle thermo valvs and
4.
o-Rr{GsReplace
llo kgf.m, 7 lbt.trl
Start the engine. Hold the sngine at 3.0OO rpm with
no load (A/T in I or @ position, M/T in neutral]
until the radiator fan comes on, then let it idl6.
Check thst valve is completely closed. lt not, air suc-
tion can be telt at the lower Don in the throttle body,
a It any suction is felt, the valve is leaking Check
engine coolant level and for air in tho engine
coolant system (see section 1O). ll OK, rsplace
the fast idle thermo valve and rechock.
11-94

Intake Air System
System Troubleshooting Guide
NOTE: Across 6ach row in the chart, the sub-systems that could be sources of a symtom are ranked in the order they
should be inspected st8rting with O. Find the symptom in the left column, read across to the most likely source, then
ret€r to the page listod at the top of that column. tf inspection shows the system is OK, try the next system @, etc.
181881 onglnol
't 1-11711-118
WHEN COLD FAST IOLE OUT OF SPEC
WHEN WARM IDLE SPEED TOO HIGH
lB18Cl cngin.l
PAGE I sue-svsreu
_\.-..\
sYMPToM \---...-
THROTTLE
CABLE
THROTTLE
BODY
INTAKE AIR
BYPASS (IAB)
CONTROL
AIR CLEANER
AND INTAKE
AIR DUCT
111191't -12011-1241l117
WHEN COLD FAST IDLE OUT OF SPECo
WHEN WARM IDLE SPEED TOO HIGHoo
LOSS OF POWERo@@
11-115

Intake Air System
System Description
The system supplies air for allengine needs. lt consists of the intake air pipe, Air Cleaner (ACL), intake air duct, Throttle
Body (TB), ldle Air Control {lAC) Valve, tast idle thermo valve, and intake manifold.
A resonator in the intake air pipe provides additional silencing as air is drawn into the system.
nacot{TRoLSOLENOIDVALVE
To
ffi -------------+ i'"ii'i''RELAY
VARIOUSSENSORS
IABCONTROLDIAPHRAGMVALVE
-BLK--L EI{GINE- cooLnnt
tFASTIDLETHERMOVALVE
U
INTAKEAIR PIPE
INTAKEAIRDUCT
11-116

lntake Air System
Throttle Body
Description
The throttle body is ot the single-barrel side-draft 1ype.
The lower portion of the throttle valve is heated by en-gine coolant from the cylinder head. The idle adjusting
screw which increases/dec.eases bvDass air and the
Evaporative Emission (EVAP) Control Canister port are
located on the top of the throttle body.
IOLE AOJUSTING
THROTTLESTOP SCREW(Non-adiustsb16l
11-120
Insoection
CAUTION: Do not adiust the thlottle stop screw. lt ispreset at the lactory.
1. Start the engine. Hold the engine at 3,OOO rpm with
no load (A/T in S or E position, M/T in neutral) until
the radiator fan comes on, then let it idle.
2. Disconnect the vacuum hose (to the EVAP control
canister) from the top of the throttle body; connect
a vacuum, gauge to the throttle body.
VACUUM PUMPGAUGEA973X-O41-XXXXX
5.
3. Allow the engine to idle and check that the gauge
indicates no vacuum.
a li there is vacuum, check the throttle cable (see
page 1 1-'l 18, 119).
Check that vacuum is indicated on the gauge when
the throttle is opened slightly from idle.
a lf the gauge indicates no vacuum, check the throt-
tle body port. lf the throttle body port is clogged.
clean it with carburetor cleaner.
Stop the engine and check that the throttle cable
operates smoothly without binding or sticking.
a lf there are any abnormalities in the above steps,
check for:
- Excessive wear or Dlav in the throttle valve shaft.
Sticky or binding throttle lever at full close po-
srtron.
Clearance between throttle stop screw and throt-
tle lever at tull close Dosition.