1994 HONDA INTEGRA engine

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 (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.
oooooooooooo
ooooooooooooooooooooooo
oooo o oo o
Dlal + I

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

Symptom-to-Component Chart
Hydraulic System
SYMPTOMCheck these items on the
PROBABLE CAUSE ListCheck these items
on the NOTES List
Engine runs, but car does not move in any gear.1, 6, 7, 16K,L,R,S
Car moves in @ and @, but not in @, @ or Iposataon.a, 29, 44. 4ac,M,o
Car moves in E, @, [, @, uut not in E position.9,30,49C, L
car moves in p:1, [o-il, [2-], [!, uut not in E position.1, 11, 22, 34, 38, 39, 40c,L,o
Car moves in N position.1, 8, 9, 10, 11,46,47C,D
Excessive idle vibration.5, 1'1B,K,L
Slips in all gears.6, 7, 16C,L
No engine braking in E position.12C,D,L
Slips in 1st gear.8, 29, 44, 4Ac,N,o
Slips in 2nd gear.9, 20, 23, 30, 49C, L
Slips in 3rd gear.10, 21 , 23, 31 , 49C,L
Slips in 4th gear.11, 23, 32, 44C,L,N
Slips in reverse gear.11,32,34,44C,N
Flares on 1-2 upshilt.3, 15, 23E,L,V
Flareson2 3 upshilt.3, 15, 23, 24, 49E,L,V
Flares on 3-4 upshift.3, 15, 23, 25, 49E,L,N,V
No upshift; transmission stays in 1st gear.14,19,G, L
No downshift to lst gear.12. 19G, L
Late upshift.14
Erratic shitting.2, 14,26
Harsh shift (up and down shiftingl.2, 4, 15, 23, 24, 25, 26, 27,
47A,E, H, I, L,V
Harsh shitt {1-2).2, 9. 15, 23C,D,E,V
Harshshilt (2-3).2, 10, 15, 23, 24C,D,E,H,L,V
Harsh shift (3-4).2,| 1, 15, 23, 25C, D, E, I,L,V
Harsh kick'down shifts.2, 15, 23, 26, 27. 2AE,L,O,V
Harsh kick-down shift 12 1)48o
Harsh downshift at closed throttle.2, 15, 23FT
Harsh shift when manually shifting to E] position.33L
Axle{s} slips out of transmission on turns.43,50
Axlels) stuck in transmission.43L,O
Ratcheting noise when shifting inro E position.6,7,38,39,40K,L,O
Loud popping noise when taking ott in E position.3a,39,40L,O
Ratcheting noise when shifting from E to E position or from Eto N I oosition.38,33,40,45L,O
Noise from transmission in all selector lever positions.6, 11K,L,O
Noise trom transmission only when wheels are rolling.39, 42L,O
Gear whine, rpm related (pitch changes with shitts).a, 13, 41K,L,O
Gear whine, speed rel6ted (pitch changes with speed).38, 42L,O
Transmission will not shift into 4th gear in @ position1,21,24.32L
Lock-up clutch does not lock-up smoothly.17, 36, 37L
Lock-up clutch does not operate properlV.2.3. 14, 15. 18, 35, 36, 37E,L,V
Transmission has multitude of problems shitting.
At disassembly, large particles oI metal are found on magnet.43L,O
14-86

NOTES
A.See flushing procedure, page l4-168 and 169.
B.Set idle rpm in gear to specitied idle speed. lf still no good, adiust motor mounts as outlined in engine
section of service manual.
lf the large clutch piston O-ring is broken, inspect the piston groove for rough machining.
lf the clutch pack is seized or is excessively worn, inspect the other clutches Jor wear, and check the
orifice control valves and throttle valves for free movement.
E.It throttle valve B is stuck, inspect the clutches for wear.
lf the 1-2 shift valve is stuck closed, the transmission will not upshift. lI stuck open, the transmission
has no lst gear.
H.lf the 2-3 orifice control valve is stuck, inspect the 2nd and 3rd clutch packs for wear.
ll the orifice cont.ol valve is stuck, inspect the 3rd and 4th clutch packs for wear.
lf the clutch Dressure control valve is stuck closed, the transmission will not shilt out of 1st gear.
K.improper alignment or main valve body and torque converter housing may cause oil pump seizure. The
symptoms ale mostly an rpm-related ticking noise or a high-pitched squeak.
L.ll the ATF strainer is ctogged with panicles of steel or aluminum, inspect the oil pump and ditferential
pinion shaft. lt both are OK and no cause lor the contamination is found, replace the torque converter.
M.lf the 1st clutch feedpipe guide in the right side cover is scored by the mainshaft, inspect the ball bear-
ing for excessive movement in the transmission housing. lf OK. replace the right side cover as it is dent-
ed. The O-ring under the guide is probably worn.
N.ReDlace the mainshstt if the bushing for the 4th feedpipe is loose or damaged.
It the 4th feedpipe is damaged or out ot tound, replace the right side cover'
Replace the subjshaft it thtbushing for the 1st-hold Jeedpipe is loose or damaged.
lf the 1st-hold feedpipe is damaged or out of round, replace it.
Replace the mainshaft if the bushing lor the 1st feedpipe is loose or damaged.
lf the lst feedpipe is damaged or out ot round, replace it.
o.A *o- r, da."s"d "p-g clutch is mostly a result of shifting the transmission in El or Lq! position
while the wheels rotate in reverse, such as rocking the car in snow.
P.InsDect the frame for collision damage.
o.Inspect for damage or wear:
1. Reverse selector gear teeth chamfers.
2. Engagement teeth chamters of countershaft 4th and reverse gear.
3. Shift fork for scutt marks in center.
4. Differential Dinion shaJt for wear under pinion gears.
5. Bottom of 3rd clutch for switl marks.
Replace items 1 , 2, 3 and 4 it worn or damaged. lf transmission makes clicking, grinding or.whirring
noise, atso replace mainshaft 4th gear and reverse idler gear and countershaft 4th gear in addition to
1,2,3ot4.lf ditiersntial Dinion shaft is worn, overhaul differential assembly, and replace ATF strainel, and thoroughly
clean transmission, tlush torque convertet, cooler and lines.
lf bottom of 3rd clutch is swirled and transmission makes gear noise, replace the countershaft and tinal
driven gear.
R.Be wry careful not to dsmage the torque converter housing when replacing the main ballbearing. You
may al;o damage the oil pump when you torque down the main valve body. This will result in oil pump
seizure it not detected. Use proper tools.
qInstall the main seal tlush with the torque converter housing, lf you push it into the torque converter
housing until it bottoms out. it will block the oil return passage and result in damage.
T,Harsh do\/vnshiJt"\./l,'hen coasting to a stop with zero th.ottle may be caused by a bent-in throttle valve
retainer/cam stopper. Throttle cable adjustment may clear this problem.
ifuitle cable adjustment is essential for proper operation of the transmission. Not only does it affect
the shift points if misad,usted, but also the shift quality and lock-up clutch operation'
A cable adjusted too long will result in throttle pressure being too low for the amount of engine torque
input into ihe trsnsmission and may cause clutch slippage. A cable adjusted too short will result in too
hi;h throttle pressure which may cause harsh shitts, erratic shrfts and torque con
14-89

Road Test
NOTE: Warm up the engine to operating temperature (the cooling fan comes on).
1 Apply parking brake and block th€ wheels. Start the engine, them move the selector lever to E] position whiledepressing the brake pedal. Depress the accelerator pedal, and release it suddenly. The engine should not stall,
2. Repeat same test in @ position.
3. Shift the selecto. lever to E position, and chock that the shift points occur at approximate speeds shown. Alsocheck fof abnormal noise and clutch slippage.
NOTE: Throttle position sensor voltage fepresents the throttle opening.
- 1 . Connect the Test Harness between the ECM and connector (see section 1 1).-2. Setthe digital multimeter to check voltage between D1 1{+)terminal and D22 { - ) terminal for the throttle Dosi-tion sensor.
TESTHARI{ESSOTLAJ_PT3OlOA
DIGITAL MULTIMETERCommarcially avsilablo o.KS-AHM-32-OO3
011 {+oooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo
14-90

Throftle OpeningUnit of spe6dl st- 2nd2nd-3rd3rd-4th
Throttle position sensorvoltage: O.7 5 V
mph20-2227,30
Km/h17,O 19.O32.5 - 35.543.5-48.5
Throttle position sensorvoltage: 2.5 V
mpn
Km/h33.5 - 36.557.O-63.O89.O-95.O
Full-opened throttlemph30- 3462-6598- 101
Km/h49.O- 55.O99.O- 105.O1 57.O- 163.O
@ or @ Position
. Upshitt
Downshift
LOCK-Up
4. Accelerate to about 35 mph {57 km/h) so the transmission is in 4th, then shift from @ Oosition to E position.
The car should immediately begin slowing down from engine braking.
CAUTION: Do not shift from @ or @ position to @ of E position at speeds over 1OO mph (160 km/h); you
may damage the tlansmission,
5. Check lor abnormal noise and clutch slippage in the following positions.
E (1st Gear) Position- 1 . Accelerate from a stop at full throttle. Check that there is no abno.mal noise or clutch slippage.
-2. Upshifts should not occur with the selector in this position
E (2nd cear) Position.- 1 . Accelerate from a stop at full throttle. Check that there is no abnormal noise or clutch slippage.-2. Upshitts and downshitts should not occur with the selector in this position.
E {Reverse) Position
Accelerate from a stop at full throttle, and check for abnormal noise and clutch slippage.
6. Test in E {Parking) Position
Park car on slope (approx. 1 6o ), apply the parking brake, and shift into LE position. Release the brake; the car should
not move.
i
Throttle Op€ningUnit ot speed4th- 3rd3rd - 2nd2nd- l Et
Full-closed throttlemph1a-216-g (3rd- 1st)
Km/h29.O-33.O1O- 14 (3rd- lst)
Full-opened throttlemph85-8954- 5823-27
Km/h1 37.O- 143.08 7.0 - 93.037.0-43.O
Throttle OpeningUnit of speed
@ Position
Lock-uo control solenoidvalve A ON
Lock-up control solenoidvalve B ON
Throttle position sensorvoltage: 2,5 V
mpntJ- to17 -20
km/h21.O- 25.O2A.O-32.O
Full-opened throttlempn92-9692-96
km/h148.O - 1 54.0r 48.0,1 54.O
Throttlo OpeningUnit of sp6edE Position
Lock-up control solenoidvalve A ON
Lock-up control sol€noidvalv6 B ON
Throttle position sensorvoltage: 1.O Vmphb|-oJ61 63
kmih98- 10298- 102
Full-opened throttlemph85 8985-89
km/h137 143137 - 143
14-91

Stall Speed
CAUTION:
a To plevent transmission damage, do not test stall speed fot mote than 1O seconds at a time.a Do not shift the level while raising th€ engine speed.a Be sure to remove the pressure gauge belot€ testing stall speed.
1. Engage the parking brake and block all four wheels.
2. Connect the tachometer, and start the engine.
3. Make sure the A/C switch is OFF.
4. After the engine has warmed up to normal operating temperature (the cooling lan comes on), shift into ft position.
5. Fully depress the brake pedal and accelerator for 6 to 8 seconds. and note engine speed.6. Allow 2 minutes for cooling, then repeat the test in [, fDil and @ positions.
NOTE:
a Stall speed tests should be used lor diagnostic purposes only.. Stall speed should be the same in E, tr. tr and @ positions.
Stall Speed RPM: rpm
Specification: 2,400 rymService Limit: 2,2OO-2,600 tpm
TROUBLEPROBABLE CAUSE
Stall rpm hish in E, E, I and @posrtronLow fluid level or oil pump output
Cloqged ATF strainer
Pressure regulator valve stuck closed
Slipping clutch
Stall rpm high in I positionSlippage of 1st clutch, 1st-hold clutch or 1st gear one-way clutch
Stall rpm high in @ positionSlippage of 2nd clutch
Stall rpm high in @ positionSlippage of 1st clutch, lst gear one-way clutch
Stall rpm high in @ positionSlippage of 4th clutch
Stall rpm low in E, E, I ana @positionEngine output low
Torque converter one-way clutch slipping
14-92