check engine light HONDA INTEGRA 1994 4.G User Guide

ldle Control System
ldle Speed Setting (cont'd)
10.
9. ldle the engine for one minute with headlights {Low}
ON and check the idle sDeed.
ldla sp6od should bo;
81881 engine:
M/T750 i 50 rpm
An75O t 50 rpm
{in $ or p] positionl
818C1 engine: 75O 1 50 rpm
Turn the headlights off.
ldle the engine for one minute with heater tan switch
at Hl and air conditioner on, then check the idle
speeo.
ldls spood should bo;
81881 ongino:
M/T82O 1 50 rpm
AN840 1 50 rpm(in [N] or lll position)
818C1 engino: 85O t 50 nm
NOTE: lf the idle speed is not within specitication,
see System Troubleshooting Guide on page 1 1-78.
11-96

lntake Air System
Throttle Body
Description
The throttle body is ot the single-barrel side-draft 1ype.
The lower portion of the throttle valve is heated by en-gine coolant from the cylinder head. The idle adjusting
screw which increases/dec.eases bvDass air and the
Evaporative Emission (EVAP) Control Canister port are
located on the top of the throttle body.
IOLE AOJUSTING
THROTTLESTOP SCREW(Non-adiustsb16l
11-120
Insoection
CAUTION: Do not adiust the thlottle stop screw. lt ispreset at the lactory.
1. Start the engine. Hold the engine at 3,OOO rpm with
no load (A/T in S or E position, M/T in neutral) until
the radiator fan comes on, then let it idle.
2. Disconnect the vacuum hose (to the EVAP control
canister) from the top of the throttle body; connect
a vacuum, gauge to the throttle body.
VACUUM PUMPGAUGEA973X-O41-XXXXX
5.
3. Allow the engine to idle and check that the gauge
indicates no vacuum.
a li there is vacuum, check the throttle cable (see
page 1 1-'l 18, 119).
Check that vacuum is indicated on the gauge when
the throttle is opened slightly from idle.
a lf the gauge indicates no vacuum, check the throt-
tle body port. lf the throttle body port is clogged.
clean it with carburetor cleaner.
Stop the engine and check that the throttle cable
operates smoothly without binding or sticking.
a lf there are any abnormalities in the above steps,
check for:
- Excessive wear or Dlav in the throttle valve shaft.
Sticky or binding throttle lever at full close po-
srtron.
Clearance between throttle stop screw and throt-
tle lever at tull close Dosition.

Emission Control System
SystemDescription
The emission control system includes a Three Way Cata-
lytic Convener (TWC), Positive Crankcase Ventilation(PCV) system and Evaporstive Emission {EVAP) Contfol
syst€m. The emission control system is designed to meet
federsl and stats emission standards.
Tailpipe Emission
Inspection
f!fifil oo nor amoro ou]rng rnr! Foacqurr. ^!op
any open flame away from yout wotk atca.
Start the engine. Hold the engine at 3,OOO rpm with
no load (A/T in @ or@ position, M/T in neutral) until
the radiator fan comes on, then let it idle,
Connect a tachometer.
Check and adiust the idle speed, if necessary (sss
page 1 1-95).
Warm up and calibrate the CO meter according to
the meter manutacturer's inst.uctions.
Check idle CO with the headlights, hester blower,
rear window defogger, cooling fan, and air condition-
er otf.
NOTE: (Canada) Pull the parking br8ke lever up.
Stan the engine, then check that the headlights are
off.
CO meter should indicate 0.1 maximum.
11-130

- Transmission Oil
NOTE: Check the oil with the engine OFF, and the car on
level ground.
1. Remove the oil filler plug, then check the level and
Maintenance
condition of the oil.
OIL FILLER PLUG44 N.m lia.5 kgf.m,
ORAIN PLUG$ N.m 14.0 kgf.m.29 lbf.fr)
33 tbtftlProper Level
2. The oil level must be up to the filler hole. lf it is
below the hole. add oil until it runs out, then rein-
stall rhe oil filler plug.
3. lf the transmission oil is dirty, remove the drain
plug and drain the oil.
4. Reinstall the drain plug with a new washer, and
refillthe transmission oil to the proper level.
NOTE: The drain plug washer should be replaced at
every oil change.
5 Reinstall the oil filler plug with a new washer.
OilCapacity
2.2 ( ''2.3 US.qt,1.9 lmp.qt) at oil chang€.
2-3 I l2.1Us.ql,2.0lmp.qtl at oyerhaul.
Use only SAE 10 w - 30 or '10 W - 40, API Service
SF or SG grade.
OIL FILLER PLUGa4 N.m l{.5 kgf.m, 33 lbf.ftl
Back-up Light Switch
Replacement
NOTE: To check the back-up light switch,
1. Disconnect the connector, then rem(
light switch connector trom the conn
2. Remove the back-up light switch.
BACX-UP LIGHT SWITCH25 N.m 12.5 kg[.m, 18 lbf.ftl
lnstall the new washer and the back-
Check the transmission oil level (see
Replace.
/itch, see section 23.
remove the back-up
]onnector clamp.
-up light switch.
) page 13-3).
Replace.
13-3

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

lgnition Timing Inspection and Setting
1.Start the engine. Hold the engine at 3,00O rpm with
no load (A/T in S or E position, M/T in neutral) until
the radiator fan comes on, then let it idle.
Pull out the service check connector located behind
the right kick panel. Connect the BRN/WHT and BLK
terminals with the SCS short connector.
4. Adiust ignition timing, if necessary, to the follow-
ing specifications:
lgnition Timing:
16 t 2 BTDC (RED) at 75O 1 50 rpm in noutral
NOTE:
a Shift lever must be in neutral.
a All electrical systems should be turned OFF.DATA LINKCONNECTOR {3-P}NOTE: Do not attachthe jumper wire.
POINTER
SCS SHORT CONNECTOR{0?PAZ-O010't 00t
SERVICE CHECK CONNECTOR I2.PINOTE: Located behind the right kickoanel
Connect a timing light to the No.1 ignition wire andpoint it toward the pointer on the timing belt cover.
TIMING LIGHT
lcont'd)
REO MARK
23-89

lFrom page 23-10O)'No. 24 (15 A): 818B'lNo. 24 (20 A): 818C1ongrneengine
Turn the ignition switch ott.
Check fuse *No. 24 in the under-dash tuse/relay bor.
Disconnect the 4-P connectorIrom the alternator.
Turn the ignition switch on {ll).
Ch6ck forvoltago between tho lGterminal (BLK/YEL wire) of rho il-Pconnector and body ground.
ls there battery voltage?Rgp.i. op.n in th. BLK|'EL wiro.
Ground the WHT/BLU wire at theL terminal ot the 4-P connector.
Chock for ! blown chrrging ry3-rom llghr bulb. It rh. butb i! oK,ropair open in lho IiYHT/BLU wiro.
Does the charging system lightcome on?
wirg sideL IWHT/BLUI
(cont'd)
23-101

Integrated Control Unit
Input Test (cont'd)
Engine Oil Pressure Indicator Flashal System:
Wire/
rWith combined washeFwipot operation
Test: Desired resultPossiblo c€use if r6rult is not obtainodNo. TelminalTsst condition
M
1Engine runningCheck for voltage to ground:
There should be battery voltage
. Faulty charging system. An oDen in the wire
YEL/RED
lgnition switch oFFCheck for continuity to gtound:
There should be continuitv.
. Faulty engine oil ptessure switch
. An oDen in the wire
lgnition switch ON (ll)Check indicator light. lf the light
does not come on, Sttach the
YEL/RED terminal to ground:
The light should come on as the
ignition switch is turned ON.
. Blown bulb. An open in the ware
Start the engine.Check for voltage to ground:
There should be battery voltage
Insufficient oil
lmproper lubrication
Faulty engine oil pressure switch
Key-in/Seat Bolt Reminder Systam:
No. WilaTest condition
NOTE: Refer to page 23-125 for the seat belt switch test.
Test: Dosired lesuhPossible causo if resuh is not obtainod
23-148'
GRN/BLU'Driver's door openCheck for continuity to ground;
There should be continuitv.
. Faulty driver's door switch
. An ooen in the wire
LT GRN/
RED
Front passenger's door
switch open
NOTE: Betore testing,
remove No. 3 (7.5 A)
tuse from the under-
dash fuse/relay box.
Check tor continuity to ground:
There should be continuitv.
. Faulty lront passenger's door switch
. An ooen in the wire
LT BLU
lgnition key inserted
into the ignition switch
Check for voltage to ground:
There should be 1 V or less.
Faulty ignition key switch
Poor ground (G201 , G401)
An ooen in the wite
RED/BLU
lgnition switch ON (ll)
and driver's seat belt
unbuckled
Check lor voltage to ground:
There should be 1 V or less.
Faulty seat belt switch
Poor ground {G551)
An open in the wire
;.rqFft,

Troubleshooting
NOTE:
a The numbers in the table show the troubleshooting sequence.
a Before troubleshooting,- check the No.15 {10 A) and *No. 24 fuses in the under-dash fuse/relay box, and the No.41 (1OO A), No.39(50 A). and No.42 (20 Al fuses in the under-hood fuse/relav box.- check that the horn sounds.
check the tachometer to see if it wo.ks pfoperly.
*No. 24 {15 A): Bl8B1 engine
No. 24 {2O A}: 818C1 engine
Item to be inspected
Symptom
-c.
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F
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c
3
dl
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o)
F
f
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c
B
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3
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aa
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oi
.9:
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_9
l
If
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!
.9
912'oE
og
Cruise control cannot be set.13
G301,
G201 ,
G401
BLU/GBN, LT GRN/RED.
BLU, BLK/YEL, LT GRN,
GRY, ORN. BRN/WHT,
BRN/BLK, BRN/RED or PNK
Cruise control can be set, but
indicator light does not go on.2G201,
G401YEL or RED/BLU
Cruise speed is noticeably higher
or lower than what was set.I3
Excessive overshootjng or
undershooting when trying to set
speed
2I
Steady speed is not held even on
a flat road with cruise control set.23
Car does not decelerate or
accelerate accordingly when SET
or RESUME button is pushed.
2LT GRN/BLK
LT GRN/RED
Set sDeed is not cancelled when
clutch Dedal is oushed (M/Tl.,1
Set sDeed is not cancelled when
shift lever is moved to fM tnnt.I2
Set speed is not cancelled when
brake pedal is pushed.'I2
Set speed is not cancelled when
main switch is pushed OFF.1
Set speed is not resumed when
RESUME button is pushed (with
main switch on, but set speed
temporarily cancelled).
LT GRN/BLK
LT GRN/RED
23-245