1998 ACURA INTEGRA ecm

i
iFuel and Emissions
SDeciaf Toofs ..,...,...............11-2
Component Locations
Index.,..,.,..................................,.,.,.,.,.,..,.,....... 11-3
System Description
Vacuum Connections ..................................,. 11-8
Electrical Connections ................................... 1 1-14
System Connectors ....,.,.,.,............................ 1 1-22
Troubleshooting
Troubfeshooting Procedures ........................ 11.32
Engine Control Module T€rminalArrangement .,.,.,..,.,. 11-39
Diagnostic Trouble Cods Chart .......-.-.......... 11-42
Howto Read Flowcharts ......,..,.,................... 1147
PGM-Fl System
System Description ............ 11-4
Troubleshooting Flowcharts
Engine Control Module ............,...,..,.,........... 11-50
Manifold Absolute PressureSensor...............................,..,.,...,................ 11-54
Intake Air TemDerature Sensor ..........,...,..... 11-58
Engine Coolant TemperatureSensor ....................,.,...,.,........................... 11-60
Throttle Position Sensor .,...........................,. 11-63
Primary Heated Oxygen Sensor(Sensor'l) .......,......,.,. 11-67
Secondary Heated Oxygen Sensorlsensor 2) .................. 11-71
Heated Oxygen Sensor Heater .....................'t1.74
Fuel Supply System ....................................... 1 1-76
Random Mistire ............. 11-78
Misfire Detected in One Cylinder .....,..:,,.,.... 11-79
Knock Sensor .........,.,..,. f -A2
Crankshaft Position/Top Dead Center/Cylinder Position Sensor .,........................ 11-83
Vehicle Speed Sensor .............,.,.,.,....,........... 11-85
Barometric Prsssute Sensor ..,...................... 11-86
Electrical Load Detector ...................,.,.......... 11-88
Crankshaft SDeed FluctuationSensor ...........................................,...,........ 11-90
ECM lnternal Circuit,..............................-......, 11-92
A/T Fl Date Line ............ 11-93
A/T Fl Signal A/B .......... 11-95
I,-1

Gomponent Locations
Index (cont'dl
THROTTLE BODY {TBIInspection, page 1 1'132
Disassembly, page 1 1-133
THEOTTLE CABLEInspection/Adjustment, pages 11-130, 131
lnstallation, Pages 11 130' 131AIR CLEANER IACL)Replacement, Page 11 129
RESONATOR
INTAKEAIRBYPASS {IAB)CONTROLDIAPHRAGM(818C1 engine onlylTroubleshooting,page 11-135
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i--- / /
i rl
l'-' i
INTAIR
POSITIVE CRANKCASEVENTILATION (PCV) VALVEInspection, page 11'140
BYPASS IIAB}CONTROLSOLENOIDVALVE (818C1 ongine only)
Troubleshootrng,page 11-135
PGM-FIMAIN RELAYRelayTesting, Page 11 124
Troubleshooting, Page 1 1-1 25
L
ENGINE CONTROL MODULE IECM}
Tro!bleshooting, Page 11 50
SERVICE CHECK CONNECTOR {2P)
Troubleshooting Procedures, page 1 1'32
DATA LINK
1 1-6
\'

System Description
System Connectors [Dash and Floor] (cont'd]
c405SERVICECHECK
c410(ECM.DICilo9{ECM-C)tL
REAR WIREHARNESS
,n
, ?l
1 1-30
L

ffi
C/|o8IECM-AI
c4r0 tEcM,D)
Different wires with the same color have been given a number
YEUBLKIand YEUBLK, are not the same).
O: Related to Fuel and Emissions System.- Connector of male terminals: View from terminal side- Connector of female terminals: View from wire side
c4r3 (a/Tlotolt (EcM-ct
cir5l
r;TJJ
\]7
f;TGnBru----ltt|cnN/Brx Il
tIl,acR*---'l
FI
H
ffi
2a58910lt't2t5t6l7!8r920z2z321
25232128a
I23o,aI'r0
1t12t31at5llt71a1s l/21
t367
E9to't1121314
2
567E
NOTE:.suffix to distinguish them (for example,

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

Engine Control Module (ECM) Reset Procedure
Either of the following actions will reset the ECM.
. Use the OBD ll scantool or Honda PGM Tester to clear the ECM'S memory.
NOTE: See the OBD ll scan tool or Honda PGM Tester use's manuals for specific operating instructions.
. Turn the ignition switch OFF. Remove the BACK UP (RADIO) (7.5 AI tuse from the under hood fuse/relay box for 10seconds.
BACK UP (RAOIO) {7.5 AI FUSE
UNDER'HOODFUSE/RELAY BOX
lll. Final Procedure (this procedure must be done after any trou bleshooting )
1. Remove the SCS Service Connector if it is connected.
NOTE: lf the SCS service connectors is connected and there are no DTCS stored in the ECM, the MIL will stav onwhen the ignition switch is turned ON (ll).
2. Do the ECM Reset Procedure.
3. Turn the ignition switch OFF.
4. Disconnect the OBD ll scan tool or Honda PGM Tester from the Data Link Connector (16P|.
{cont'd)
11-33

l7
Troubleshooting
Troubleshooting Procedures (cont'd)
lf the inspection for a particular code requires voltage or resistance checks at the ECM connectors, remove the right door
sill molding and kick panel. pull the carpet back to expose the EcM. Unbolt the EcM cover. Turn the ignition switch off
and connect the backprobe sets and a digital multimeter as described below check the system according to the procedure
described {or the appropriate code(s) listed on the following pages'
How to Use the BackPlobe Sets
Connect the backprobe adapters to the stacking patch cords, and connect the cords to a multimeter' Using the wire insulation
as a guide for the contoured tip of the backprobe adapter, gently slide the tip into the connector lrom the wire side until it
comes in contact with terminal end of the wire
I
BACKPROBE AOAPTER
BACKPROBE SET
DIGITAL MULTIMETER
{Commetcially avrilable) or
KS-AHM-32-003
\
11-34
07SAZ - 001000A (two required)

Troubleshooting
Troubleshooting Procedures (cont'd)
Symptom Chart
Listed below are symptoms and probable causes for problems that DO NOT cause the malfunction Indicator Lamp (MlL) to
come on. lf the MIL was reported on, go to page 11-32.
Troubleshooting each probable cause in the order listed (from left to right) until the symptom is eliminated.
The probable cause and troubleshooting page relerence can be found below.
Other Probable Causes for an engine that will not start:
Engine will not sta rt- Compression- Engine locked up- Timing belt
\_
- Starting system- Overheating- Battery
'4,
It
Probable Cause List (For the DTC chart. see page 11-421
Probable CausePageSystem
111-50Engine Control Module (ECM)
211118Fuel pressure
311-124PGM-Fl main relay
4Section 23lgnition system
51 1-83Crankshaft Position/ToD Dead Center/Cylinder Position sensor circuit
11-58Intake Air Temperature (lAT) sensor circuit
71 't- 100ldle Air Control (lAC) Valve
811110Fast idle thermo valve
I11lllldle speed adjustment
'1011-132Throttle body
111 1-130Throttle cable
1211-54lvlanifold Absolute Pressure {MAP) sensor
IJ1163Throttle Position {TP) sensor
1411-86Barometric pressure (BARO) sensor
1 '1 106A/T gear position signal {see section 23)
16'1 1 104Brake switch signal
1711 129Air Cleaner
181 1- 134Intake Air Bypass {lAB} control system and intake air pipe
19'1 1 138Three Way Catalytic Convener (TWC)
2011-141Evaporative emission (EVAP) control
21Contaminated fuelll ll 21 | - | cont"-in"t"o tu"
11 l-
I
,l 11-36
-
SYMPTOMPROBABLE CAUSE
Engine will not stan4, 2, 3,5, 21, 15, 1
Hard starting2, 4, 12, 14,20,21
Cold fast idle too low
Cold fast idle too high7, 8, 9, 11, r0
ldle speed fluctuates7,8,9,11,10
Misfire or rough runningTroubleshoot for misfire on pages 11-78,79
Low power2, 10,'t1, 13, 14, 17, 19, 12
Engine stalls2, 4,1 , 12,21,9, 5, 16