1994 HONDA INTEGRA Ecm

Electrical Troubleshooting
Troubleshooting Flowchart
ls the MIL blinking?
fs the voftage 4.75 5.25 V?
Possible Cause
. Disconnected lock-up controlsolenoad valve A connector. Short or open in lock-up controlsolenoid valve A wire. Faulty lock-up control solenoid
NO
YES
Repair open or shorl in WHT/BLK wir€ botwe€n th€ D18 termi-nal and the ECM.
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ls there voltage?
NO
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A25
Turn the ignition switch ON.
Check whether the MalfunctionIndicator Lamp (MlL) blinks (see
section I 1).
Repair the PGM-FI System (see
section 1 l ).
Turn the ignition switch OFF.
Disconnect the 26P and 22P con-nectors from the TCM.Connect the Test Harness "A"
and "D" connectors to the wireharness only, not to the TCM {seepage 14-49).
Turn the ignition switch ON.
Measure the voltage between theD18 and A25 or 426 terminals.
Measure the voltage between the46 and A25 or A26 terminals-
Repail short to power sourco inYEL wi.e between the A6 termi-nal and the lock-up control sole-noid valve A.
Turn the ignition switch OFF.
To page 14'53
14-52

Electrical Troubleshooting
Troubleshooting Flowchart (cont'dl
Turn the ignition switch ON.
Check whether the MalfunctionIndicator Lamp (MlL) blinks (seesection 1 1).
Ropair tho PGM-FI Sysrom (se€soction 11).ls the MIL blinking?
Turn the ignition switch OFF.
Disconnect the 26P and 22P con-nectors trom the TCM.Connect the Test Harness "A"
and "D" connecto.s lo the wireharness only, not to the TCM (seepage 14-49).
Turn the ignition switch ON.
Measure the voltage between theD'18 and A25 or 426 terminats_
Rapair opon or shon in WHT/BLK wi.e botweon the O18 te.mi-nal rnd the ECM.
ls the voltage 4.75-5.25 V?
lvleasure the voltage between the44 and A25 or 426 rerminals.
Ropsir shon to power source inGRN/BLK wi.o betwoon the A4t6.minal and th€ lock-up controlsolonoid valve B.
Turn the ignition switch OFF.
14-54
Possible Cause
. Disconnected lock-up conlrolsolenoid valve B connector. Short or open in lock-up controlsolenoid valve B wire. Faulty lock up control solenoidvalve B

Troubleshooting Flowchart (cont'd)
Sof{irgnolis D! indic€tor tightblinks throo rim6s.
Turn the ignition switch ON.
Check whother the MalfunctionIndicator Lamp (MlL) blinks (seesection 1 1).
Replir thc PGM-FI Syrtom l.s.!.ction 111.ls the MIL blinking?
Turn the ignition switch OFF.
Oisconnect rho 26P 6nd 22P con-nectors lrom the TCM.Connect the Test Harness "A"
and "D" connectors to the wireharness only, not to the TCM lseepage |4-491.
Turn the ignition switch ON.
Measure the voltage between theDl8 and A25 or A26 teiminats.
Rcpalr opon or shon In WHT/BLK wlr. botw.cn th. D18 t.mi-nsl rnd th. ECM.
ls the voltage 4.75-5.25 V?
Turn the ignirion swirch OFF.
Connect the Test Harness "A"
and "D" connectors to the TCM.
Turn the ignition switch ON.
Measure the voltage betwe€n theD7 and A25 or 426 rerminals.
Roprlr oprn o. lhon in RED/BLKwil. botwaan tha DT ta]minal andtha TP ranaor.
ls the voltage 0.4-0.6 V?
Chock tor looro TCM connoctora.ll noce$rry, subatitulo r known-good TCM and rechock.
Possible Cause
. Disconnocted throttle position{TP) sensoa connoctor. Short or oDen in TP s€nsor wire. Faulty TP senaor

Electrical Troubleshooting
S€ltdiagno3b Lql indicaror lighrblinks sovon timgs.
Turn the ignition switch ON.
Check whether the MalfunctionIndicator Lamp {MlL) blinks (seesection 11).
Ropai lhe PGM-FI Sysrem (so€Bection 1 11,ls the MIL blinking?
Turn th6 ignition switch OFF.
Disconnect the 26P and22P con-nectors from the TCM.Connect the Test Harness "A"
and "D" connectors to the wireharness only not to the TCM (seepage 14-49).
Turn the ignition switch ON.
Measure the voltage betw€€n theD18 and A25 or A26 lerminals.
Repair opon o. sho.t in WHT/BLKwire botwoon th€ D18 tarminaland the ECM.
fs the voftage 4.75-5.25 V?
Measure the voltage between theA5 and A25 or A26 terminals.
Ropair lhon to powor sourc6 inBLU/YEL wiro botwoon the A5torminal and th6 lhift control solo-noid valve A.
Turn the ignition switch OFF.
Troubleshooting Flowchart (cont'dl
Dl8( r I
Possible Cause
. Discohnected shift control sole-noid valve A connector. Short or open in shift controlsolenoid valve A wire. Faulty shill control solenoid
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Electrical Troubleshooting
Troubleshooting Flowchart (cont'dl
Possible Cau6e
. Disconnected shift control sole-noid valve B connector. Short or open in shift controlsolenoid valve B wire. Faulty shilt control solenoidvalve B
Solfdiagnolir [!4 Indicato. lightbllnk! eight tim6r.
Turn the ignition switch ON.
Check whother the MalfunctionIndicator Lamp {MlL) blinks (seesection I 11.
Rcpsir rho FGM-FI Syrtem lso6scciion l1l.ls the MIL blinking?
Turn the ignition swirch OFF.
Oisconn€ct the 26P and 22P con-nectors trom the TCM.Connect the Test Harness "A"
and "D" connectors to the wirohamess only. not to the TCM {sesp6ge 14-49).
Turn the ignition switch ON.
Measure the voltage betwe€n theD18 and A25 or A26 terminals.
Ropeir opon or short in WHT/BLKwiro trotweon th6 D18 termineland tho EcM.
ls the voltage 4.75-5.25 V?
Measure the voltage between th€A3 and A25 or A26 terminals.
Ropair rhort to powor rourco inGR /WHT wir6 b€twgan tho A3tormirEl and shift conLol lolonoidvalve B.
Turn the ignition switch OFF.
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To page

Electrical Troubleshooting
Troubleshooting Flowchart (cont'dl
Possibl€ Caus6
. Disconnoct€d engine coolantt€mp€rature (ECTI sensor con-noctor. Short or open in the ECT sensor
. Faulty ECT s€nsor
Self-diagnosis E indicator lightblinks ten times.
Turn the ignition switch ON.
Check whether the MalfunctionIndicator Lamp {MlL} blinks (seesection 1 1)-
ls the MIL blinking?Rop.ir tho PGM-FI Syrt.m (!go
!.ction 111.
Turn the ignition switch OFF.
Disconnectthe 26P and 22P con-nectors trom the TCM.Connect the Test Harness "A"
and "D" conneclors to the wireharness only, not to the TCM (seepage 14 49).
Measure the voltage between theD'18 and A25 or A26 lorminals.
Bopair op.n or .hofi In WHT/BLKwiro botwoon tho O18 tanni.|al.nd the ECM.ls the voltage 4.75-5.25 V?
Turn the ignition switch OFF.
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Dlal + I

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.
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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