1994 HONDA INTEGRA sensor

PGM-FI System
Manifold Absolute Pressure (MAP) Sensor
fxai - lfil1 The Malfunction Indicator Lamp (MlL) indicates Diagnostic Trouble Code (DTC) 3: An electrical
-:- -?- problem in the Manifold Absolute Pressure (MAPI Sensor circuit.
The MAP sbnsor converts manitold absolute pressure into electrical signals and inputs the ECM.
OUTPUTVOLTAGE
600 700
(in. Hsl GAUGEREADIIIO{mft Hg)
YEL/RED lBlSBl onginc)YEL^YHT lBlaCl .ngin.l | + I
{+l
SENSOR
1.5
- Tho MIL has boon roportod on.- Wirh tho SCS rhort connoctorconnectod lsoo pags 11-34),codo 3 b indicatsd.
Do the ECM Reset Procedure {soepage 11-35).
Intormittont tailuro, lystom ir Ol(at thls timo {tort drivo may bsnocessary).Chack to? Door connocllon oiloosa wiroa 6t C223 {locltod atright shock tow6rl, C'l 14 (MAP
sonaorl and ECM.
ls the MIL on and does it indi-cate code 3?
Turn the ignition switch OFF.
Disconnect the 3P connector tromthe MAP sensor,
Turn the ignition switch ON.
{To page 11-53)
11-52

Measure voltage between YEL/WHT {818C1 engine), YEL/RED(B188'1 engine) {+ ) terminal andbodv ground.
Measure voltage between YEL/WHT (818C1 engine), YEL/RED{B1881 engine) (+ } terminal andGRN/WHT (- ) terminal.
ls there approx. 5 V?
Repair opon in GRN/WHT wir6 botweonECM lD2l l and thoMAP sonsor,
Turn the ionition switch OFF.
ls there approi. 5 V?
Connect the test harness "D"
connector to the ECM only, nottothe main wire harness {see page11,37).
Turn the ignition switch ON.
Measure voltage betweon wHT/YEL (+ ) terminal and GRN/WHT{- } terminal.Measure voltage between D19{+} terminal and D21 {-}termrnat,
ls there approx. 5 V?
Bepair open in YEL/WHT wi.e be-tw€6n ECM lD19) and tho MAPaon30t.
ls there approx. 5 V?
Substitule s known-good ECMand rechock. ll symptom/indica'tion goes away, replac€ tho oiigi'nal ECM.Turn the ignition switch OFF.
Reconnecl the 3P connector tothe MAP sensor.
Connect the test harness betweenthe ECM and connector (see page1 1-371.
Turn the ignition switch ON.
11,52)
{To page 11-54}lTo page I l-54)
(cont'd)

PGM-FI System
Manifold Absolute Pressure
lFrom page 11-53)
{MAPI Sensor (cont'd)
(From paqe 1 1-53)
NO
M6asure voltage between D17{+) terminal and 021 (-}terminal.
ls there approx. 3 V?
Substituto 6 known{ood ECM.nd rach.ck. It symptom/indica-tion gooa away, Eplaco tho orlgi-nrl €CM.
Turn the ignition switch OFF.
Connect the test harness "D"
connector to the ECM only. not tothe main wire harness lsee page11-37).
Turn the ignition switch ON.
Measure voltage botwson Dl7(+) terminal and D21 {-}terminal.
R.p.lr opon or ahort in WHT|rELwi?o botw.on ECM {O17) and thoMAP senso..ls there approx. 5 V?
Substitute a known{ood ECMand rochsck. It prdcribed voltrgob now availablo, rophce trie origi-nal ECM.
approx. 3 v?
-D17 til D21 (-l
ooooooooooooo I oooooooo l l5oiE€tdl ooooooo
o oooo oooooooo ! ooooooooooooooooooo
11-54
'.---.-'

PGM-FI System
TDC/CKP/CYP Sensor
_f'=l_ fi_l The Malfunction Indicator Lamp (MlL) indicates Diagnostic Trouble Code (DTC) 4: A problem int:- the Crankshaft Position (CKP) Sensor circuir.
l'6]- ftl - The Malfunction Indicator Lamp (MlL) indicates Diagnostic Trouble Code (DTC) 8: A problem in-i- the ToD Dead Center ITDC) Sensor circuit.
-flG]l- ft-] The Malfunction Indicator Lamp (MlL) indicates Diagnostic Trouble Code (DTC) 9: A problem in- , - the Cvlinder Position ICYP) Sensor circuit.
The CKP Sensor determines timing tor fuel injection and ignition of each cylinder and also detects engine speed. TheTDC Sensor determines ignition timing at start-up (cranking) and when crank angle is abnormal. The CYP Sensor detects
the position of No. 1 cylinder tor sequential fudl injection to each cylinder.
- \.--r-l - -__l_-
tPJ:;LlJ:lEl--;l ?,:
- Tho MIL hos beon roponod on.- With rho SCS short connoctorconneclod lsso pago I l-341,code 4, 8 and/or 9 ar6 in-dicated.
Do the ECM Reset procedure (seepage 11-35).
Intohittent failuro, syst€m is OKat thia tima {t6st drivo may benoceaSaayr.Chock for poo. connections orlooss wires at C222 (located atright shock towerl, C110(TOC/CKP/CYP Sonsorl and ECM.
ls the MiL on and does it in-dicate code 4, 8 and/or 9?
Turn the ignition switch OFF.
Disconnect the 8P connector fromthe TDC/CKP/CYP sensor.
{To page 1 1-57)
11-56

{From page 11-56)
Measure resistance between ter-minals of the indicated sensor.'see table
R.olac6 th. distributorhousing (8oo aoction231.ls there 35O-7O0 0?
Check for continuity to bodyground on both terminals ot theindicated sensor,
Rgplace tho di.tributorhousing llo€ loction23t.
Connect the test harness to themain wire harness only, notto theECM (see page 1 1-371.
Measure resistance between ter-minals of the indicated sensor ontest harness.'see table
Roprir opon in tho indi-cated senaoa wirea.*soo tablols there 350 70O 0?
Repair short to bodyground in tho indicrl.dt€naor wiroa.i s€e tabla
SEIiSOFDTCSENSORECMTENMINAICOLOR
2815ATU/GFN
6816BTUTVEI
TDCa813ORN/BTU
814
9B1tORN
as12
o o ooooo oo ooo o I oooooooo l6coocl o oo ooo ooooo
o oooo ooooo ooo I oooo oooo lo{nofioo't oooooooo ooo
812350-7000?
Check for continuity to bodyground on 815. 813 and/or B'l 1terminals.
ls there continuity?
NO
Substituto a known-good ECMand rechock. lf symptom/indica-tion goes away. roplaco tho origi-n.l ECM.
11-57

PGM-FI System
Engine Coolant Temperature (ECT) Sensor
- ,-!-- ---1- -
t@l- -l 6 | The Malfunction Indicator Lamp (MlL) indicates Diagnostic Trouble Code (DTC) 6: A problem in- - the Engine Coolant Temperature (ECT) Sensor circuit.The ECT Sensor is a temperature dependant resistor (thermistor). The resistance oI the thermistor decreases as th€ en-gine coolant tempe.ature increases as shown below.
J rsG-11
RESISTANCE{k0l
- \.--r-l--t 5 | /--i- \
j 32 68lOrr la0 t76 2t2 2a8 (.Fl-2tt 0 20 rto ao D r@ t20 (,cl
ENGII{E COOLAI{T TCMPERATURE- Th€ MIL has boon roDortod on.- Wlth tho SCS shon connoctorconnoctod {s66 pag6 '11-34},
code 6 is indicatod.
Do the ECM Reset Procedu.e lseepage 1 1-35).
Turn the ignition switch ON.
Intoimittont failur6. ryatom is OKel this lime ltosl d.ive may bonocassaryl.Chock for poor connsctiona orlooso wiros al C223 {locatod attight shock lowor, C111 (ECT
sonsorl, C419 {TCMI and ECM.
ls the MIL on and does it indi-cate code 6?
Start the engine. Hold the engineat 3,O0O rom with no load {Afi in
N or lF]position, M/T in neutral)until the radiator lan comes on,then lot it idle.
Turn the ignition swirch OFF.
Disconnect the 2P conneclor lromthe ECT sensor.
Measure resistance between the2 terminals on the ECT sensor.
ls there 2OO-4OO O?
(To page 1 1-59)
11-58
--

ECT SENSOR
GRN/BLU {-}
Turn the ignition switch ON.
Measure voltage betweon RED/WHT and body ground.
Measure voltage between RED/WHT {+}terminal and GRN/8LU(- ) terminal.ls there approx. 5 V?
ls there approx. 5 V?Ropai. opon in GRN/BLU wiro botwoon ECM(D221 and tho ECT36n3('r.Turn the ignition switch OFF.
Sub3tituto a known-good €CMand rochock. lf 3ymptom/indica-tion go6s away, roplaco the odgi-nal ECM.
Oisconnect the 22P connectortrom the Transmission ControlModule (TCM).
Turn the ignition switch ON.
ls there approx. 5 V7
Turn the ignition switch OFF andreconnect the connector to theTCM.
Connect the test harn€ss "D"
connector to the ECM only. not tothe main wire harness {see page11-37).
Turn the ignition switch ON.
Measure voltage between D13(+) terminal and D22 (-l ter-mlnal.
Repair opoa or shon inREO/WHT wiro botwoen ECMlDl3l and th6 ECT sonsor.R6pair shon in REO/WHT YYi..b6tw66n ECM {D131and TCM.
ls the.e approx. 5 V?
Substiluto a known-good ECMand rochock. ll lymptom/indica-tion goea 6wsy, replaco tho o.igi-n6l ECM,
A/T only
I
_i
11-59

.:-\.-----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 )
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