air condition ACURA INTEGRA 1998 Service Repair Manual

Engine Ramoval/lnstallation
(cont'dl
13. Remove the engine wire harness connectors, termi-
nal and clamps on the left side ot engine compan-
menr,
6 x 1.0 mm9.8 N.m 11.0 kgl.m,7.2 tbt.ttl
14. Remove the cruise control actuator.
I x 1.25 mm24 N.m 12.4 kgt.m,17 tbt.ft)
5-6
A/C COMPRESSOR EELT
\
l.15.
to.
Remove the engine ground cable at the body end.
Remove the adjusting bolt and mounting bolts, then
remove the power steering (P/S) pump belt and
pump.
. Do not disconnect the P/S hoses.
MOUNTING BOLTSI x 1.25 mm24 N.m 12.4 kgt'm, 17 lbl.ft)
Loosen the idler pulley bolt and adjusting bolt, then
remove the air conditioning (Ay'C) compressor belt.
IDLER PULLEY BOLT10 x 1.25 mm/14 N'm 14.5 kgf.m, 33 lbt'frl
I
I
't7.

3.
Removal/lnspection/lnstallation
Drain the engine oil.
Turn the crankshatt and align the white groove onthe crankshatt pulley with the pointer on the lowercover.
Remove the cylinder head cover and middle cover.
Remove the power steering pump belt, air condition-er belt and the alternator belt.
Remove the crankshaft pulley and remove the low-er cover.
6. Remove the timing belt,
7. Remove the drive pulley.
8. Remove the oil pan and oil screen.
9. Remove the oil pump.
OIL PUMP
OIL PAN
8-1
'10. Remove the screws from the pump housing, thenseparate the housing and cover.
1 1 . Check the inner-to outer rotor radial clearance on thepumD rotor.
Inner Rotor-to-Outei Rotor Radial ClearanceStandard (Newl: O.04-O.16 mm
lO.OO2-O.O06 int
Service Limir: 0.20 mm {0.O08 in)
12. Check the housing-to-rotor axial clearancepump rotor.
Housing-to-Rotor Axial Clearance
Standard (New): 0.02-0.07 mm(0.0O1 -O.003 in)
Service Limit: O.15 mm (0.006 inl
on tne
1

t-
il
Troubleshooting ".
Troubleshooting Proccdures
How To Begin Troubleshooting
When the Malfunction lndicator Lamp {MlL) has been reponed on, or there is a driveability problem, use the appropri-
ate procedure below to diagnose and repair the problem.
A. When the MIL has come on:
'1. Connect the Honda PGM Tester or an OBD ll
scan tool to the 16P Data Link Connector (DLC)
located behind the front console right side.
2. Turn the ignition switch ON (ll).
3. Check the DTC and note it. Also check and note
the freeze frame data. Refer to the Diagnostic
Trouble Code Chart and begin troubleshooting.
NOTE:
. SeetheOBDll scantool or Honda PGM Tester user's manuals for specific operating instructions.
. The scan tool or tester can read the Diagnostic Trouble Codes (OTC). freeze frame data, current data, and other
Engine Control Module (ECM) data.
. Freeze frame data indicates the engine conditions when the first malfunction, misfire or luel trim malfunction
was detected. lt can be useful information when troubleshooting.
B. When the MIL has not come on, but there is a driveability problem, refer to the Symptom Chart on page 11-36.
C. DTCS wjll be indicated by the blinking of the Malfunction lNdicator Lamp {MlL) with the SCS service connector con-
nected.
Connect the SCS service connector to Service Check Connector as shown. (The 2P Service Check Connector is
located under the dash on the passenger's side of the car,) Turn the ignition switch on (lll.
scs sERvlcE coNNEcToEo?PAZ - 0010100
MAI-FUNCTIONINDICATORLAMP{MIL)
DATA LINK CONNECTOR Il6PI
OBO ll SCAN TOOL orHONDA PGM TESTER

How to Read Flowcharts
A flowchart is designed to be used from start to final repair. lt's like a map showing you the shone$ distance. But beware:if you go off the "map" anywhere but a "stop" symbol, you can easily get lost.
FTARN(bold type)
FcroNl
@>
sroFl
(bold type)
NOTE:
. The term "lntermittent Failure" is used in these chans. lt simply means a system may have had a failure, but it checksout OK at this time. lf the Malfunction lndicator Lamp (MlL) on the dash does not come on, check for poor connectionsor loose wires at all connectors related to the circuit that you are troubleshooting (see illustration below).. Most of the troubleshooting flowcharts have you reset the Engine Control Module (ECM) and try to duplicate theDiagnostic Trouble Code (DTC). lf the problem is intermittent and you can't duplicate the code, do not continue throughthe flowchart. To do so will only result in confusion and, possibly, a needlessly replaced ECM.. "Open" and "Short" are common electrical terms. An open is a break in a wire or at a connection. A short is an acci-dental connection of a wire to ground or to another wire. In simple electronics, this usually means something won,twork at all. In complex electronics (like ECM's), this can sometimes mean something works, but not the way rr s sup-posed 10.
Describes the conditions or situation to start a troubleshootinq flowchart
Asks you to do something; perform a test, set up a condition etc.
Asks you about the result of an action, then sends you in the appropriate troubleshooting direction.
The end of a series of actions and decisions, describes a final repair action and sometimes direcls you toan earlier part of the flowchart to confirm your repair.
11-47

PGM-FI System
System Description
ENGINE CONTROL MODULE (ECM)OUTPUTS
*1: USA*2: 818C1 engine*3: A,/T*4: 818C1, 818C5 engines
PGM-FI Sy3tem
The PGM-Fl system on this model is a sequential multiport fuel injection system.
Fuel lniector Timing and Duration
The ECM contains memories for the basic discharge durations at various engine speeds and manifold pressures. The
basic discharge duration, after being read out from the memory. is further modified by signals sent from various sensors
to obtain the final discharge duration.
ldle Air Control
ldle Ai. Control Valve (lAC Valve)
When the engine is cold, the Ay'C compressor is on. the transmission is in gear (Ay'T only)the brake pedal is depressed, the
P/S load is high, or the alternator is charging, the ECM controls current to the IAC Valve to maintain correct idle speed.
lgnition Timing Control
. The ECM contains memories for basic ignition timing atvarious engine speeds and manifold pressures, lgnitiontiming
is also adjusted for engine coolant temperature.
. AKnockControl System isadoptedwhich sets the ideal ignition timing for the octane n um ber of gasoline used*r,
Other Control Functions
L Starting Control
When the engine is started, the ECM provides a rich mi{ure by increasing fuel injector duration.
2. Fuel PumD Control
. When the ignition switch is initially turned on, the ECM supplies ground to the PGM-FI main relay that supplies
current to the fuel pump for two seconds to pressurize the fuel system.
. When the engine is running, the ECM supplies ground to the PGM-FI main relay that supplies current to the fuel
DUmO.
. When the engine is not running and the ignition is on. the ECM cuts ground to the PGM-FI main relay which cuts
current to the fuel oumo.
INPUTS
TDc/CKP/CYP Sensor
CKF Sensor
MAP Sensor
ECT Sensor
IAT Sensor
TP Sensor
HO2S
VSS
BARO Sensor
ELD*1
Starter Signal
ALT FR Signal
Air Conditioning Signal
A,/T Gear Position Signal*3
Battery Voltage (lGN.1)
Brake Switch Signal
PSP Switch Signal*'
Knock Sensor*1
VTEC Pressure Switch*4
Fuel Tank Prssure Sensor
Fuel InjectorTiming and Duration
Electronic ldle Control
Other Control Functions
lgnition Timing Control
ECM Back-uD Functions
Fuel-lnjectors
PGM-Fl Main Relay (Fuel Pump)
MIL
IAC Valve
A,/C Compressor Clutch Relay
Radiator Fan Belay*1
Condenser Fan Relay
ALT*1
rcM
EVAP Purge Control Solenoid
Valve
H02S Heater
VTEC Solenoid Valve*'
IAB Control Solenoid Valve*,
EVAP Bypass Solenoid Valve
EVAP Control Canister Vent
Shut Valve
11-48

3.Fuel Cut-off Control
. Du ring dece leration with the th rottle va lve closed, cu rrent to the fuel injectors is cutoffto improvefuel economyat
speeds over following rpm:. B'1881 engine: 970 rpm {Canada model: 1.050 rpm). B18C1 engine:970 rpm {Canada model: 1.050 rpm). 818C5 engine: 1,300 rpm (Canada model: 1,400 rpm)
. Fuel cut-off action also takes place when engine speed exceeds 7,000 rpm (B'1881 engine), 8.100 rpm (818C1
engine) or 8,600 rpm (818C5 engine), regardless ol the position of the thronle valve, to protect the engine from
over-revving.
A,,/C ComDressor Clutch Relav
When the ECM receives a demand for cooling from the air conditioning system, it delays the compressor from being
energized, and enriches the mixture to assure smooth transition to the A,/C mode.
Evaporative Emission (EVAP) Purge Control Solenoid Valve
When the engine coolanl temperature is above '154'F (68'C) and the air conditioner on. the ECM controls the EVAPpurge control solenoid valve which controls vacuum to the EVAP purge control canister.
Intake Air Eypass (lAB) Control Solenoid Valve*a
When the engine rpm is below 5,750 rpm, rhe IAB control solenoid valve is activated by a signal from the ECM, intake
air flows through the long intake path, then high torque is delivered. At speeds higher than 5,750 rpm, the solenoidvalve is deactivated by the ECM, and intake air flows through the short intake path in order to reduce the resistance in
airflow.
Sell-diagnosis Function lMalfunction Indicator Lamp {MlL)lWhen 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 for the N4lL tor two seconds to
check the MIL bulb condition.
Two Driving Cycle Detection Method
To prevent false indications, the Two Driving Cycle Detection Method is used for the HO2S, fuel metering-related, idle
control system, ECT sensor, TWC and EVAP control system and other self-diagnostic functions, When an abnormality
occurs, the ECM stores it in its memory. When the same abnormality recurs after the ignition switch is turned OFFand ON (ll)again, the ECM informs the driver by lighting the MlL.
However, to ease troubleshooting, this function is cancelled when you shon the service check connector. The MIL will
then blink immediately when an abnormality occurs.
4.
5.
6.
3.
4.
ECM Fail-safe/8ack.up F0nctions
1. Fail-sate Function
When an abnormality occurs in a signal from a sensor, the ECM ignores that signal and assumes a pre-programmed
value for that sensor that allows the enqine to continue to run.
2. Back-uo Function
When an abnormality occurs in the ECM itself, the fuel injectors are controlled by a back-up circuit independent of the
system in order to permit minimal driving.
11-49

PGM-FI System
Primary,Heated Oxygen Sensor (HO2S) (Sensor 1) (cont'dl
The scan tool indicates Diagnostic Trouble Code (DTC) P0133: A slow response problem in the Primary
Heated Oxygen Sensor (HO25) (Sensor 1) circuit.
Description
By controlling the airlfuel ratio with a Primary HO2S (Sensor 'l) and a Secondary HO2S (Sensor 2), the deterioration of the
primary HO2S {Sensor 1) can be evaluated by its teedback period. When the feedback period of the HO2S exceeds a cer-
lain value during stable driving conditions, the sensor will be judged as deteriorated.
When deterioration has been detected during two consecutive trips, the MIL comes on and DTC P0133 will be stored
NOTE: ll DTC P013't, P0132 and/or P0'135 are stored at the same time as DTC P0133, troubleshoot those DTCS first, then
troubleshoot DTC P0133.
Possible Cause
. Primary HO2S (sensor 1) Deterioration
o Primary HO2S Heater (sensor 1) Deterioration
. Exhaust system leakage
Troubl€shooting Flowchart
')
litll r
- Tho MIL has boon raDortcd on.- DTC P0133 is storcd.
Problem verificttion:1. Do the ECM Reset Procedure.2. Start the engine. Hold thoengine at 3,000 rpm with noload (in Park or neutral) untilthe radiator fan comes on.3. Connect the SCS service con-
4. Test'drive Lrnder f o llowingconditions.* 55 mph (89 km/h) steadyspeed- NT in E position, M/T in5th gear- Until readiness code com€son
lnt.flnittcnt ftilu... ay3tam ia OKat thb tiinr. Ch.ck fo. poor con-necliona o. looaa wita! al Cll3
lPrim.ry HO2S lscn.or lll lndECM.
ls DTC P0133 indicated?
Roplacs the Primary HO2S lscn-3or 1),

PGM.FI
Misfire
System
Detected in One Cylinder (cont'd)
)
Troubleshooting Flowchart
ff
i
)
NOTE:.lf there is no freeze data of misliring,just clear the DTC.'lf there is no freeze data of misfiring,test drives under various conditions
The MIL has b6€n reported on.DTC P0301, P0302, P0303 0rP0304 is indicated.
Check the fuel iniector function:Stan the engine, and listen for aclicking sound at the fuel injectorin the problem cylinder.
Check for an open or shon in theharness between ECM and thefUel injector.
Repair open or short in the wiro.
- Replace tho luel inisctor.- Sub3titute a known-goodECM and rach€ck. It symptom/indicrtion 90e3 away, replacethe original ECM.
Problem ve.ification:1. After checking the freeze data,do the ECM Reset Procedure.2. Exchange the spark plug fromthe problem cylinder with oneof another cylinder.3. Connect the SCS service connector.4. Test-drive the car several timesin the range of the treeze data.
(To page 11-81)

2.
1.
1.
2.
After the engine stans, the IAC valve opens for a certain time. The amount ol air is increased to raise the idle speed
about 150 - 300 rpm.
When the coolant temperature is low, the IAC valve is opened to obtain the proper fast idle speed. The amount of
bypassed air is thus controlled in relation to the engine coolant temperature.
IDLE SPEEDtrpm,
ENGINECOOLANT TEMPERATURE
140
50
104
40
-1 32
-20 0
176 ('F)
80 fcl
When the idle speed is out of specification and the scan tool does not indicate Diagnostic Trouble Code (DTC) P0505
or P'1508, check the following items:. Adiust the idle speed (see page '11-111)
' ALT FR signal (see page 11-101). Air conditioning signal {seepage'11-102)' Brake switch signal (seepagell-104)
. Starter switch signal (see page 11-1051. A,4 gear position signal (see page 1l 106) (A"/T)
. PSP switch signal (see page 11-108) (USA)
. Fast idle thermo valve (see page 11-110). Hoses and connections. IAC valve and its mounting O rings
ll the above items are normal, substitute a known-good IAC valve and readjust the idle speed (see page 'l I -1 1 l).
lf the idle speed still cannot be adjusted to specification (and the scan tool does not indicate DTC P0505 or P1508) after
IAC valve replacement, substitute a known-good ECM and recheck. lf symptom goes away, replace the original ECM.
11-97

ldle Control System
ldle Control System
i P0505 | fne scan tool indicates Diagnostic Trouble Code (DTC) P0505: ldle control system malfunction,
NOTE: ll DTC Pl508 is stored at the same time as DTC P0505, troubleshoor DTC P1508 first. then troubleshoot DTC P0505.
Possible Cause
. IAC valve mechanical malfunctiorr
. Fast idle thermo valve malfunction (A"/T)
. Throttle body clogged port, improper adjustment
. Intake manifold, gasket leakage
. Intake air hose loose, leakage
a Vacuum hoses leakage
. ECT sensor incorrect output
. Throttle Position sensor incorrect output
Troubleshooting Flowchart
Problem verification:1. Start the engine. Hold theengine at 3,000 rpm wath noload 1in Park or neutral) untilthe radiator fan comes on,then let it idle.2. With the scan tool, check thefollowing items.- Throttle position should beapprox. 10% with the throttle fully closed.Engine coolant tempera-ture should be 116 212F(80 - 100'c).lf they are not within thespec., repair the faulty sensor crrcuft,3 Check the engine speed atidle with no-load conditions:headlights, blower fan, reardefogger, radiator fan, and airconditioner are not operating,
- The MIL has been reported on.- DTC P0505 is stored.
ls it 750 t 50 rpm (81881,
818C1 engines), 800 I 50 rpm(818C5 engine)?
Intermittent failur6, svstsm is OKat this tim€.
ls it 550 rpm (81881,818C1
engines), 600 rpm {818C5enginelor less?
-98
(To page 11'99)(To page 11-99)