ACURA INTEGRA 1994 Service Repair Manual

Conneci the Test Hs.ngs6 "A"
and "O" connectors to thg TCM.
Start the engine and warm it upto normal ope.ating t€mpsratuG(the rsdiator fan comes on).
Measurgthe voltage between the05 and A25 or A26 terminals.
Rlplir opsn or rhort in BED/WHTwira botwaan tra D5 torr nC lndtha ECT lanaor.
ls the voltago less th6n lV?
Ch.ct tor loora TCM co.rmcror..It nocgallry, sublthuta a known-good TCM .nd rechrck.
14-69

Electrical Troubleshooting
Troubleshooting Flowchart (cont'd)
Possible Cause
. Disconnected ignition coil con-neclor. Short or open in ignition coil
. Faulty ignition coil
Solt-diagnosis lq.l indicstor lightblinks elovon tim6s.
Disconnect the 26P connectorIrom the TCM.
Turn the ignition switch ON.
Measure the voltage between theAg (BLU) and A25 (BRNiBLK) orA26 (BRN/BLK) terminals.
ls there baftery voltage?R6pai? opon or short in BLU wirolrotwqan lh. A9 torminll 6nd th.ignilion c!il.
Ch6ck lor loos6 TCM connactora.It nacosaary, substituto a known-good TCM and rochock.
NOTE: View from wire side.
14-70

Disconnect lhe 26Pand 22P con-nectors trom the TCMConnect the Test Hahess "A"
and "D" connectors to the wireharness only, not to th€ TCM {seepare'14-49).
Possible Cause
. Short or open in LT GRN wire between the D3terminal and the ECM.. Fauky the barometric pressure {8ARO} sensor.NOTE: The BARO sensor is built into lhe ECM.
ooooooooooooo
oooooooooooo0oOOqgopg I,oiOOOOol ooo ooooooooooocqooo:Joo.oipggl o oooooo o 9ooTurn the ignition swirch ON.
Measure the voltage between theD18 and A25 or A26 terminals.
ls the voltage 4.75-5.25 V?
Turn the ignition swith OFF.
A25t- |
Soll-diagnosis Lq! indicator lightblinks thirtoon tim6.
ls rhe Malfunction lndicatorLamp (MlL) on and does itindicate code 13?
Do the TCM Rest Procedure (seepage 14-49).
Turn the ignition switch ON.
Substituto a known-good ECM and rechock.ll symptom/lndicationgoos away, .oplace theoriginal ECM.
ls the MIL on and does itindicare code 13?
Turn the ignition switch OFF.
Ropair opon or short in WHT/BLKwir6 botwoon th€ D18 to.minaland tho EcM.
fo page 14-72
14-71

Electrical Troubleshootang
Troubleshooting Flowchart (cont'd)
From page '14-71
TCM 22P CONNECTOR
Disconnect the 22P connectorslrom the TCM and ECM.
Check for continuity between theD3 {LT GRN) terminal ol the TcM22P connecror and the D8 ILTGRN) terminal of the ECM 22Pconnector.
Ropai. opon In LT GRN rvi.a b.-twoon tho TCM and ECM.
Check lor continuity between theLT GRN wire and body ground.
Ropair short lo body ground inLT GRN wir6.
Ch€ck lor loos6 TCM and ECMconnectors, lf necessary, aubari-tute a known-good TCM andrccheck.
NOTE: View from wire side.
ECM 22P COiINECTOR
14-72

S.fdl.enorl! L&l indicdor lighlblinks fourtoon tlmoa.
ls the Malfunction IndicatorLamp (MlL) onl
Stan the ongine and warm it upto normal operating temperature{th€ radiator lan com€s on).
Shift to E position,
Turn rhe ignition switch OFF.
Possible Cause
. Sh"rt ". "e"" i" FAS |YEU ,"rirt. Fsulty ECM.
Connect the Test Harness be-tween the TCM and connociors{see page 14-491.
Turn the ignition switch ON andwsit for at least two seconds.
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o oooo oooooooo l:OOOO OO 60 l.,OO{tO.O6,'l o oooooooooo
Measure lhe voltage betwgan thso16l+ ) and A25 or A26(- | tor-mrnals.
lcont'd)
Ropair tho PGM-FI Syrtom lloo..ctlon 111.
Chock for looro TCM connoctora.lf noco$ary, subatituta a known-good TCM and .ech€ck.ls thoro approx. 5 V?
Turn the ignition switch OFF.
Dkconnect the Test Harness fromthe TcM.Leave connect€d to car harness.
Turn the ignition switch ON.
fo page 14-74
14-73

Electrical Troubleshooting
Troubleshooting Flowchart (cont'd)
ls there continuity?
o o o o o o o o O o O o O $:O.COOtt9O$:l:OtO:CtOiOi:l O o O O O O o O o o Oo o o o o o o o o o o o O I:f(O.{iltltO{t{t:I:OFA:F:d:O:l o o o o o o o O o o o
NOTE: View lrom wire side.
NO
From page 14-73
Measure the voltage between theD 16{+ ) and A25 or A26{- ) ter-mtnals.
Check for loos€ TCM connoctors.ll ngcossary, substituto a known-good TCM and rechock.
ls there approx. 5 V?
Disconnect the 26P connectorfrom the ECM.
Check for continuitv between theD16 and A25 or A26 rerminals ofthe Test Harness.
Ropairshort in YEL IFAS) wire be-tw6on TCM and ECM.
Disconnect the 26P and 22P con-nectors from the Test Harness.
Check for continuity between theD16 (YEL) terminal ot fCM 22Pconnector and A19 (YEL) terminalof ECM 26P connector.
Chgck tor loos€ TCM connoctofs.lf nocassary, substitute o known-good TCM and rech6ck.
Ropair opon in YEL {FAS} wiro bo-trve€n TCM and ECM.
oooooooooooo
oooooooooooo
ooooooooooo
ooooooooooo
22P CONNECTOB

Possible Cause
. Disconnected mainshaft speedsensor connecror. Short or open in mainshaltspeed sensor wrre.. Faulty mainshatt speed sensor.
NOTE:. A code 15 on the TCM doesn't alwsysmean there's an electrical problem in themainshaft or countershaft speed sensor cir-cuit; code '15 may also indicate a mechani-cal Droblem in the transmission.
3P CONNECTOR
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I ooooooooooooo l Sciii:ddii:ijii:l:i$idi$;d6#:l o oooop oo ooo | 6
"-f
1-L(0)Y-!
(cont'd)
solf-diagnosis E indicator lightblink tiftoon timos.
Are the mainshaft and counter-shalt speed sensors installedproperly?
Disconnect the 3P connector lromthe mainshaft speed sensor.
Measure the resistance ot themainshaft speed sensor.
ls the resistance 4OO-600 O?
Disconnect the 22P connectorfrom the TCM.Connect the Test Harness "D"
conneclor to the wire harnessonly, not ot the TCM (see page14-49).
Check the continuity betweenD19 and D12 terminals and bodyground.
Rcoair short in ORN/BLU otWHT/BLU wiros botween Dlgand Dl2 to.minals and tho main-shatt speod ronsor.
Reconnect the 3P connector tothe mainshatt speed sensor,
To page 14-76
14-75

Electrical Troubleshooting
Troubleshooting Flowchalt (cont'd)
From page 14-75ooooooooooooo
oooooooooooooooooooooooo
ooooooooooo
Measure the resistance betweenD19 and D12 terminals.
Run Electrical Troubleshooting folcode 9.Check for loos6 TCM connectors.It nocessary, substitute a known-good TCM and r.check.
ls the resistance 4O0-600 0?
Disconnecl the 3P connector fromthe mainshaft speed sensor.
Check tor continuitv betweenD19 terminal and the mainshaltspeed sensot connector.
Ropair op.n in ORN/BLU wir6 b6-tweon D19 terminal snd th€ main'shaft spa6d sensor.
Chock tgr continuity betweenD12 terminal and the mainshattspeed sensor connector.
Ropair open in WHT/BLU wire be-twe€n D12 tgrminal and th€ main-shaft sD6ed sonsor.
Chsck for loos€ TCM connoctors.ll noco$ary, substitute a known-good TCM and rocheck.
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ooooooooooooo
ooooooooooooo
ooooooooooo
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MAINSHAFT SPEED SENSOR
3P CONNECTORView from terminal side
MAINSHAFT SPEED SENSOR
14-76

@ indic"to, light i8 on st6sdyInot blinkingl whenevor the ioni-tion switch is ON.
Disconnect the 26P connectorfrom the TCM.Connect the Test Harness "A"
connector to the wite harnessonly, not to the TCM (see page14-49).
Turn the ignition switch ON.
Measure the voltage between theA8 terminal and body ground.
Ropair shon to power in GRN/BLKwiro botwoen A8 terminal andgauge assembly.
Check for a sho.t to ground on thePNK/GRN wi.e. ll th€ wir. is OK,roplac€ the A/T gear poaition in-dicator.
Turn the ignition switch OFF.
ls there voltage?
Connect the Test Harness "A"
conneclor to the TCM.
Measure the voltage between the417 terminal and body groundwith the selector lever in anv oo'sition other than El.
ls there volrage?
ReDlace tho TCM.
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{cont'd)
14-77

Electrical Troubleshooting
Troubleshooting Flowchaft (cont'dl
Does the @ indicatorcome on?
ls there baftery voltage?
YES
lighr
I A25
| | o ooooo o oo o ooo r:sjc.o.sl'1*st,li*os.s.4tcl ooo oo oooooo I
I I o o o o o o o o o o o o q lifrif.S..n${5git:li$gg-:aiiigitll o o o o o o o o o o o I|--.-T..-I a26
+d
+
I + )A23 A25l - l
(+ tA24 426(- |t\@
Lq4 indicator light do6s not comeon with the ignition switch ON. (ltshould come on Ior about 2seconds.l
ls the service check connectorconnected with the specialtool ISCS Short Connectod?
Diaconnect tho spocial tool fromth6 sgrvice check connoctor andrecheck.
Check {or loos6 TCM connoctors.lf necessaw, substitute a known-good TCM and recheck.
Turn the ignition switch OFF.
Disconnect the 26P connectorfrom the TCM.Connect the Test Harness "A"
conneclor to the wile harnessonly, not to the TCM (see page14-49).
Check for continuity between theA25 terminal and body groundand A26 and body ground.
R€pair open BRN/BLK wires be-twe6n A25 or A26 torminals andG 101.
Turn the ignition switch ON.
Measure the voltage between theA23 or A24 and A25 or A26 termrnals-
Repaii open or short in BLK/YELwire between tho A23 and /ot424 terminals and underhoodtuse /relav box.
Turn the ignition switch OFF.
To page 14-79
14-78