1994 HONDA INTEGRA ignition

CAUTIOI{:
a All SRS eloctdcal wiring harna$os are covcred whh
yollow lnaulation.
a Sofora disconnecting any pan ot tho SRS wirc har'
n6ss, connoct the short connoctots (s€6 pago 23-701.
a Roplacs tho entiro aff.ct d SRS ham6t. rssombly it
ii has an opon circuil or damagcd wlrlng.
lf the inspection to. a particular lailure code requir6s the
use of Test Harness {07LAJ - PT3O1 OA):
1, Remove the left side kick panel on the driver's side(see page 1+84).
2. Connect the wire harness to the Tsst Harness.
and/or connect the Test Harness to the TCM sccord-
ing to the troubleshooting flowchart.
NOTE:
a Only the A and D terminals of the Test Harnsss aro
used for Ay'T troubleshooting.
a Unless otherwise noted, use only the Digital
Multimeter, commerciallv available or KS-AHM-
32{)03, for testing.
c
DIG]TAL MULTIMETERComm€rciallv availableKS-AH M-32-.003,or gouivalEnt
) o o o o o o o o o o ) olo D o o o o o qoo o o o olo o o o o . o o o . c
To.miml Locrtlonr
a TCM Ro3at Procoduro
1 . Tum the ignition switch off.
2. Remove the No. 32 BACK UP fuse {7.5 A} from the
under-hood luse/relay box 'or 10 seconds to reset
the TCM.
NOTE; Disconnocting the No. 32 BACK UP tuse also
cancels ths radio anti-theft code, preset stations and
tho clock sefting. Get the customer's code number
and make note ol the radio presets before removing
the fuss so you can reset them.
a Finll hoc.dulr
NOTE: This procedure must be done after any
troubleshooting.
1 . Removs ths s9ocialtool from the Service Check Con-
noctor.
2. Reset the TCM.
3, S6t th€ radio preset stations and clock setting.
BACK UP (7.5 A} FUSE
14-49

Number of @indicator light
blinks while
Service Check
Connector is
connected with
the special tool.
@ indicator
lightPossible CauseSymptomRefer to
page
'loBlinksDisconnected engine coolant tempera-
rure (ECT) sensor connector
Short or open in ECT sensor wire
Faulty ECT sensor
Lock-up clutch does not
engage.14-68
1lOFFDisconnected ignition coil connector
Short or open in ignition coil wire
Faulty ignition coil
. Lock-up clutch does not
engage.'t 4-7 0
13Blinks. Shon or open in LT GRN wire between
the D3 terminal and ECM. Faulty barometric pressure {BARO)
sensor
NOTE: The BARO sensor is built into
the ECM
. No specific symptom
appears.
14-7 1
14Blinks. Short of open in FAS {YEL} wire be-
tween the D16 terminal and ECM. Faulty ECM
. Transmission jerks hard
when shitting.
't5OFFDisconnected mainshaft speed sensor
connecror
Short or open in mainshaft speed sen-
sor wire
Faulty mainshaft speed sensor
. Transmission jerks hard
when shifting.
14-75
SymptomProbable CauseRet.page
LQ! indicator light is on steady, not blinking whenever the ignition is on.14-77
[Q3] indicator light does not come on for 2 seconds after ignition is first
turned on.14-78
Lock-up clutch does not have duty operation (ON-OFFI.Check A/C signal with
A/C on.14-80Lock-up clutch does not engage.
Shitt leve. cannot be moved lrom @ position with the brake pedal
depressed.Check brake switch signal,14-41
It the self-diagnosis LQ4 indicator light does not blink, perform an inspection according to the table below.
a lf a customer describes the symptoms for codes 3, (yet the LQ! indicator light is not blinkingl, 6, 1 1 or 15, it will
be necessa.y to recreate the symptom by test driving. and then checking the @ indicator light with the ignition still
oN.
e lt ttre @ indicator light displays codes olher than those listed above or stays lit continuously, the TCM is faulty.. Sometimes the Lqd indicator light and the Malfunction Indicator Lamp (MlL)/Check Engine light may come on simul-taneously. lf so, check the PGM-Fl system according to the numbe. of blinks on the MIL/Check Engine light. thenreset the memory by removing the BACK UP fuse in the unde.-hood fuse/relay box for more than 1O seconds. Drive
the vehicle for several minutes at speed over 30 mph (5O km/h), then recheck the MIL/Check Engine light.
NOTE:
. PGM-FI system
The PGM-Fl system on this model is a sequential multiport fuel injection system.a Disconnecting the BACK UP luse also cancels the radio anti-theft code. preset stations and the clock setting. Get
the fuse so vou can reset them.the customer's code number and make note ot the radio
14-51

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.
(-)
| | o " q " " o o o o o o o q litigse.*grq$:,1:d:sd:siia:l " "" o " " o o oo " I
I ro'r+ r rz6 r-tL--- l /trtr-- l
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
Troubleshooting Flowchart lcont'dl
Possible Cause
'Short in A/T gear posilionswitch wire. Faulty A/T gear position switch
NOTE: Code 5 is caused whenthe TCM receives two gear po-sition inputs at the same time.
Or425 t- |
-l@r
A19l+) A25 (-)
YES
14,59
Solt-diagno8is l!4 indicato. tightblinks fiv6 timos.
Turn the ignition switch ON.
Observe the A/T gear position in-dicator, and select each positionseparately.
Do any indicators stay onwhen the selector lever isnot in that position?
The systom is OK ai this timo.Ch.ck tho wiro ha|noss toroamago.
Turn the ignition switch OFF.
Connect the Test Harness be,tween the TCM and connectors{see page 14-49}.
Turn the rgnition switch ON.
Shilt to other than E position.
Measure the voltage b€tween theA21 and A25 or 426 terminats.
Chock for short in GRN/RED wi.o botwoon tho A2t torminaland th6 A/T goar po6ition swirch or A/T 96ar posirion indi-cator. lf wire is OK, chock for loo8o TCM connocioF. lfnecassary, subatituto a known-good TCM and rochsck.
Measure the voltage between the419 and A25 or 426 terminals.
Ch6ck for 6hon in LT GRN/BLK wi.e borwoon tho A19 tor-minal and tho A/T goar position indicato., o. a shon inGRN/WHT or GRN wiros botwson tho A/T goa. position in-dicato. and tho A/T goa. position swhch. ll wire is OK. chockfor looso TCM connactoE. lf nocos$sry, substituto a known-good TCM and .ech6ck,
ls the battery voltage?
14-58
To page

Electrical Troubleshooting
Troubleshooting Flowchart {cont'dl
ls there voltage?
ls there voltage?
NO
To page l4-61
- - r9ta21(+ I A25{-)
Self-diagnosis E indicator lightblinka six timos.
Connect the Test Harness be,tween the TCM and connectors(see page '14-49).
Turn the ignition switch ON.
Measure the voltage between theA21 and 425 or 426 terminals.
Ropair open in GRN/RED wire be,tweon th6 A21 terminal and theA/T gssr position switch.
Shilt ro N or E position.
Measure the voltage between theA19 and A25 or A26 terminals.
Ropair open in LT GRN/BLK wireb€tw6on the 419 torminal and th€A/T gear position indicato..
Possible Cause
. Disconnected A/T gear positionswrtcn connector' Open in A/T gear position switch
. Faulty A/T gear position switch
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14-60

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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