check engine light HONDA INTEGRA 1994 4.G Workshop Manual

Cylinder Block
Inspection (cont'dl
2.Check the top of the block for warpage.
Measure along the edges and across the center as
snown.
SURFACES TO BE MEASURED
Engine Block Warpsgc:
81881 ongine:
Standard lNewl: 0.07 mm {0.003 inl max.
Service Limil: 0.10 mm {0.00,1inl
B18Cl engine:
Standard (New): 0.05 mm 10.002 inl max.
Service Limit 0.08 mm {0.003 inl
Measure cylinder bores as shown on page 7-13.
lf the block is to be reused, hone the cylinders and
remeasure the bores.
Hone cylinder bores with honing oil and a fine (400
grit) stone in a 60 degree cross-hatch pattern.
NOTE:
. Use only a rigid hone with 400 grit or finer stone
such as Sunnen, Ammco, or equivalent.
a Do not use stones that are worn or broken.
When honing is complete, thoroughly clean the
cylinder block of all metal panicles. Wash the cylin-
der bores with hot soapy water, then dry and oil
immediately to prevent rusting.
NOTE: Never use solvent, it will only redistribute
the grit on the cylinder walls.
lf scoring or scralches are still present in cylinder
bores after honing to the service limit, rebore the
engine block.
NOTEr Some light venical scoring and scratching is
acceptable if it is not deep enough to catch your fin-
gernail and does not run the full length of the bore.
CYLINDER HONE
. After honing, clean the cylinder thoroughly with
soapy water.
. Only scored or scratched cylinder bores must be
noneo.
7-14

Installation (engine removal not
S€AL DRIVEB07LAD - PRimroAlnstallse6lwith tho
Pan numbertacing out.
Using the special tool, drive in the flywheel-end seal
until the driver bottoms against block.
NOTE: Align the hole in the drivsr attachment withthe Din on the crankshaft.
Oil Seal
required)
The seal surface on the block should b€ dry.Apply a light coat of grease to the crankshaft andto the lio of seal.
Using the special tool, drive in the timing pullsy-
end seal until the driver bottoms against the oilpump.
When the seal is in place, clean any excess grease
off lhe crankshaft and check that the oil seal tiD isnot distoned.
7-26

Englne Oil
Replacement {cont'd)
API CERTIFICATION SEAL
The numbers in the middle of the API Service label tellyou the oil's SAE viscosity or weight. Select the oil foryour car according to this chart:
Ambient TomDo?aturo
An oil with a viscosity of 5W-3O is preferred for improvedfuel economy and year-round protection in the car.You may use a l OW-3O oil it the climate in your area islimited to the tempe.ature range shown on the chart.
4. Fillthe engine with oil up to the specified level, .un
the engine for more than three minutes. then checklor oil leakage and oil level.
ElrclltEs
Oil Filter
Replacement
CAUTION: Aftar the ongine has boan run. tho oxhaustpipos will bo hot; b€ caretul when wo.king around tho
erhaust manitold,
Remove the oil tilter with the special oil filter wrench.
Inspect the threads and rubbe. sealon the new lilter.
Wipe off seat on engine block. then apply a light coat
of oil to the tilter rubber seal,
NOTE: Use only filrers with a built-in bypass system.
Inspect threads andrubber seal surface-
Apply oil to rubber sealbetore anstalling.
ENGINE OIL COOLER(8'l8Cl ongino onlyl
8-6

Oil Pressure
Testing
lf the oil pressure warning light stays on with the enginerunning, check the engine oil level. lf the oil level is
correct:
1. Connect a tachometer.
2. Remove the oil pressure switch and install an oil pres-
sure gauge.
3. Stan the engine. Shut it off immediately if the gauge
registers no oil pressure. Repair the problem before
continuing.
4. Allow the engine to reach operating temperatu,e {fancomes on at least twice). The Dressure should be:
Engine Oil Pressure:
At ldle: 70 kPa (0.7 kgf/cmr, 10 psi)
minimum
At 3,OOO lpm: 340 kPa {3.5 kgf/cmz, 50 psi}
minimum
a lJ oil pressure is within speciJications, replace the
engine oil pressure switch and recheck.
a lf oil pressure is NOT within specifications, in-
spect the oil pump (see page 8-1O).
1.2 mm 10.05 in)
'16 N.m (1.6 kgt.m, l2lbt.ftl
Oil Jet
Inspection (B18C1 engine only|
Remove the oil jet (see page 8-4) and inspect it as
follows.
a Make sure that a I .l mm (O.04 in) diameter drill
will go through the nozzle hole {1 .2 mm {O.OS in)
diameterl.
a Insert the other end of the same 1.1 mm (O.O4
in) drill into the oil intake {1.2 rnm {0.05 in}
diameter).
Make sure the check ball moves smoothlv and has
a stroke of approximately 4.0 mm {O. 16 in).a Check the oil jet operation with an air nozzle. lt
should take at least 2OO kPa (2.O kgf/cmr,28
Dsi) 10 unseat the check ball.
NOTE: Replace the oiljet assembly if the nozzle
is damaged or bent.
2. Mounting torque is critical. Be very precise when in-
stalling.
Torque: 16 N.m (1.6 kgt.m, 12lbf.ftl
OIL PRESSURE GAUGECOMMERCIALLYAVAILABI.E
8-8

t5.Check the housing-to-outer rotor radial clearance.
Housing-to-Outer Rotol Radial Clearance:
Standard {Newl: O.1O -O.19 mm(O.oO4-O.OO7 in)
Servic€ Limit: O.2O mm {O,OO8 in)
Inspect both rotors and pump housing for scoring or
other damage. Replace parts il necessary.
Remove the old oil seal trom the oil pump.
Gently tap in the new oil seal until the special tool
bottoms on the PumP.
NOTE: The oil seal alone can be replaced without
removing the oil pump.
14.
15.
to-
OIL PUMP
8-11
1'lReassemble the oil pump, applying thread lockto the
pump housing screws.
Check that the oil pump turns freely.
Apply a light coat of oil to the seal lip.
Install the two dowel pins and new O-ring on the oil
pump.
Apply liquid gasket to the cylinder block mating sur-
face of the oil pump.
NOTE:
. Use liquid gasket, Part No. 08718-OOO1.
a Check that the mating surfaces are clean and dry
betore applying liquid gasket.
a Apply liquid gasket evenly, in a narrow bead cen-
tered on the mating surface.
a To prevent leakage of oil, apply liquid gasket to
the inner threads ot the bolt holes.
Do not install the parts if 20 minutes or more have
elapsed since applying liquid gasket. Instead.
reapply liquid gasket aftet removing the old
restclue.
After assembly, wait at least 20 minutes before
filling the engine with oil.
(cont'd)
18.
19.
20.

Troubleshooting
Self-diagnostic Procedures
When the Malfunction Indicator Lamp {MlL) has been reported on, do the following:
'1. Connect the SCS short connecto. to Service Check Connector as shown. (The 2P Service Check Connector is
located under the dash on the passenger side of the car.) Turn the ignition switch on.
DATA LII{KCONNECTOR (3PI
NOTE:Do not attachjumper wire.
2. Note the Diagnostic Trouble Code (DTC): The MIL indicates I code by the length 8nd numbsr ot blinks. The MIL
can indicate multiple component problems by blinking separate codes, one after another. Codes 1 through Igre
indicated by individual shon blinks. Codes 1O through 43 are indicated by a series of long and shon blinks. Th€
number of long blinks equals the first digit, the number ot short blinks equals the second digit. Sometimes the
firsr blink is difficult to see; always count the blinks at least twice to verify the code.
MALFUNCTIOI{INDICATORLAMP
CANADA:CHECKENGINELIGHTIMIL}
Sgprrate Prcbaomr:shT
-n-----n- =n- = s.o DTc 1
+!+1].TL;I!!=- = s.. Drc 3-L ,JU '" " " = Sce DTC 13
Long .hon
Multiplr Probl.ln.:
J-l_tx-TL-n-ffu-r- = S€. DTC 1 lnd 3-J.rrU-L-r]tltlr'l- __-tnrua = Sce DTC 3 and 4Jll-lrl-t-----Tt/'tnj]_ = S.. DTC 3 lnd 14
11-34

Troubleshooting
Self-diagnostic Procedures (cont'dl
':818C1 engine
a lf codes other than those listed above are indicated, verifv the code. lf the code indicated is not listed above, replace
rhe ECM.
a The MIL may come on, indicating a system problem when, in fact, there is a poor or intermittent electricalconnection.
First, check the electrical connections, clean or repair connections it necessary.
o The MIL and @ indicator light may light simultaneously when the Diagnostic Trouble Code (DTC) 6, 7 or 17. Check
the PGM-Fl system according to the PGM-Fl system troubleshooting, then recheck the l!! indicator light. ll it lights,
see page 14-5O, 51.
a The MIL does not come on when there is a malfunction in the A/T Fl signal or Electrical Load Detector (ELDI circuits.
However, it will indicate the codes when the Service Check Connector is shorted.
DIAGNOSTIC
TROUBLE
CODE (DTCISYSTEM INDICATEDPsge
oENGINE CONTROL MODULE IECM)11-42
,lHEATED OXYGEN SENSOR IHO25)1 1-46
aMANIFOLD ABSOLUTE PRESSURE {MAP SENSOR)11-52
4CRANKSHAFT POSITION (CKP SENSOR)1 1-56
oENGINE COOLANT TEMPERATURE (ECT SENSOR)11-58
THROTTLE POSITION (TP SENSOR}11-60
ITOP DEAD CENTER POSITION (TDC SENSORI1 1-56
9No. 1 CYLINDER POSITION (CYP SENSOR)1 1-56
10INTAKE AIR TEMPERATURE (IAT SENSOR)11-62
13BAROMETRIC PRESSURE (BARO SENSOR}1|-64
14IDLE AIR CONTROL (IAC VALVE}11-42
tcIGNITION OUTPUT SIGNAL11-66
toFUEL INJECTOR1't-102
17VEHICLE SPEED SENSOR {VSSI11-68
20ELECTRICAT LOAD DETECTOR (ELD)'t 1-70
21VARIABLE VALVE TIMING & VALVE LIFT ELECTRONIC CONTROL SOLENOID
VALVE {VTEC SOLENOID VALVE)'6-36
22VARIABLE VALVE TIMING & VALVE LIFT ELECTRONIC CONTROL PRESSURE
SWITCH (VTEC PRESSURE SWITCHI-6-38
23KNOCK SENSOR {KS}-11-7 4
30A/T FI SIGNAL A11-76
3'rA/T FI SIGNAL B1 1-76
4'lHEATED OXYGEN SENSOR (HO25} HEATER11-47
43FUEL SUPPLY SYSTEM1 1-50
11-36

3. Fuel Cut-oft Control
a During deceleration with the throttle valve closed, current to the {uel injectors is cut otJ to improve fuel economy
at speeds over tollowing rpm:
. 8188l engine: 91O tpm (Canada model: 1,O50 rpm)
. 818C1 engine: 95O tpm (Canada model: l,O5O rpm)
a Fuel cut-olf action also takes place when engine speed exceeds, 7,O0O rpm {81 8B1 engine), 8,1O0 rpm (B 18Cl
engine), regardless oI the position of the throttle valve, to protect the engine from ovet-revving.
A/C Compressor Clutch Relay
When the ECM receives a domand for cooling trom the air conditioning system, it del8ys the compressor from being
enetgized, and enriches the mixture to assure smooth transition to the A/C mode.
Evaporative Emission (EVAP) Purge Control Solenoid Valve
When the engine coolant tempersture is below 163oF {73"C), the ECM supplies a ground to the EVAP pu.ge control
solenoid valve which cuts vacuum to the EVAP purge control diaphragm valve.
Intake Air Bypsss (lAB) Control Sol€noid Valve
When the engine rpm is below 5,750 rpm, the IAB control solenoid valve is activated by a signal from the ECM,
intske air flows through the long intake path, then high torque is delivered. At spaeds highe. than 5,750 rpm, the
solenoid valve is deactivated by the ECM, and intake air flows through the short intake path in order to reduce the
resistance in airflow.
ECM fail-safe/bEck-up Functions
1. Fail-sate Function
When an abnormality occurs in a signal from a sensor, the ECM ignores that signal and assumes a pre-progtammed
value tor that sensor that allows the engine to continue to run.
Back-uD Function
When an abnormalitv occurs in the ECM itself, the fuel iniectors are controlled by a back-up citcuit independent of
the system in order to permit minimal driving.
Self-diagnosis Function IMaltunction Indicator Lamp {MlL)1
Wh6n an abnormality occurs in a signal from a sensor, the ECM supplies ground for the MIL and stores the code
in erasable memory. When the ignition is initially turned on, the ECM supplies ground tor the MIL tor two seconds
to check the MIL bulb condition.
Two Trio Detection Method
To prevent tals€ indications, th€ Two Trip Dstection Method is used for the HO2S and fuel metering-related self-
diagnostic tunctions. When an abnormslity occurs, the ECM stores it in its memo.y. Wh€n the ssme sbnormality
recurs alter the ignition switch is turned OFF and ON ag8in, the ECM informs the driver by lighting the MlL.
However, to ease troubleshooting, this function is canc€ll€d when you short the service check connector. The MIL
will then blink immedistelv when an abnormality occurs.
4.
6.
2
4.
11-41

PGM-FI System
Engine Control Module (ECM)
lB18B1 ongino onlyl
The Malfunction Indicator Lamp(MlL) n6v6. com6s on lovon follwo socondal aftor ignition istumed on.
lurn the ignition switch ON.
Inspect No. 15 {BACK-UP LIGHT}l1O A) luse in the underdashtuse/relay box.ls the low oil pressure light on?
- R€placo No. 'l5
IBACK-UP LIGHT)llo Al fuso.- Ropair short inYEL wiro botwoonNo. 15 (BACK-UP
LIGHT) {10 A) fusoano gauge 6$om-blv.
Turn lhe ignition switch OFF.
ls the fuse OK?
Connecl the test harness betweenthe ECM and connectors (seepag€ 11-37).Repair opon in YEL wiio botw6onNo.'15 IBACK-UP LIGHTI 110 A)luso and gaug6 assombly.
Turn the ignition switch ON.
- RsDlaco tho MIL bulb.- Ropair opon in GRN/ORN wi.ebetwoen ECM {A13} andgaug€ a$6mbly.
ls the MIL on?
Measure voltage between body
Oround and the tollowing termi-nafs individuallv: 423, 424.
Ropah op6n in BLK wirolsl bo-tw6en ECM and GlOl llocatod atthormostat housing) that hadmoro than 1.0 V.
ls there less than 1.O V?
Substituto a known-good ECMand rochgck, lf symptom/indica-tion go€s away, roplaco tho origi-nal ECM.
NOTE: lf this svmptom is intermittent. check for a loose fuse No. 15 (BACK
UP LIGHT, 1OA) in the under-dash Juse/relay box, a poor connection at ECM
terminal A13, or an intermittent open in the GRN/ORN wire between the ECM(A13) and the gauge assembly.
I A13
I| | o oooo oooooooo I oooo oooo I ooooool ooooooooooo I
G 10'l
11-42

- ldle Speed Setting
Inspoction/Adiustment
NOTE:
a When the idle speed set, check the following items:
- The MIL has not been reported on.- lgnition timing- Spark plugs- Air cleaner- PCV svstem
a (Canada) Pullthe parking brake lever up. Stan the en-
gine, then check that the headlights are off.
1 Start the engine. Hold the engine at 3,000 rpm with
no load (A/T in S or @ position, M/T in neutral)
until the radiator tan comes on, then let it idle.
2. Connect a tachometer.
3. Disconnect the 2P connectot trom the ldle Air Con-
trol {lAC) valve.
Start the engine with the sccelerator pedal slightly
depressed. Stabilize the rpm at 1 ,OOO, then slowly
release the pedal until the engine idles.
Check idling in no-load conditions: headlights, blower
fan, rear defogger, radiator fan, and ai. conditioner
are not operatrng.
ldl€ spood should bo;
81881 ongino:
MlT48O ! 50 rym
An48O I 50 rpm
lin@or@oosition)
818C7 engine:48O ! 50 rym
Adjust the idle speed, if necessary, by turnmg the
idle adiusting screw.
NOTE: After adiust the idle speed in this step, check
the ignition timing (see section 231.
lf it is out ot spec. go back to step 4.
4.
e
Turn the ignition switch OFF.
Reconnect the 2P connector on the IAC valve, then
remove the BACK UP (7.5 A) fuse in the under-hood
tuse/relav box for 1O seconds to reset the ECM.
Restart 8nd idle the engine with no-load conditions
for one minute, then check the idle speed.
NOTE: (Canada) Pull the parking brake lever up.
Start the engine, then check that the headlights ate
off.
ldlo speed should be;
81881 ongino:
MTf75O ! 50 rpm
AIT75O t 50 rpm
(in[]or@positionl
818C1 engine: 750 1 50 rpm
(cont'd)
11-95