sensor ACURA INTEGRA 1998 Service Repair Manual

lnterlock System
Circuit Diagram
NOTE: Different wires with the same color have been given a number suflix to distinguish them (for example,cRNA/VHT I and cRNMHT ' are not the same).
WHT/ BLK .-- WHI
cnrruvgr'
+. BRAKE LIGNTS.CSUISE CONTROLUNIT. ABS COIITROL UNIT' ECM
INTEBLOCKCONTROLUNIT
A]'IGEARPOStTIONINOICATOR
v
t,
UNDER-HOOO FUSEi RELAY BOX
N0.41 (100A) N0.42 (404)
YEUBLUcnrivrr '
WHT/BLU
KEYINTERLOCKswtTcH
THBOTTLEPosrT|0N (TP)SENSOR
f7
IRED/BLK
(Cjl :in posiron E t
23-14A

){r/
Control Unit Input Test
1. Disconnect the 8P connector from the interlock con-
trol unit.
2. lnspect the connector and socket terminals to be
sure they are all making good contact.
a It the terminals are bent, loose or corroded, repair
them as necessary, and recheck the system.
a lf the terminals look OK, make the following in-
put tests at the connector.- lf a test indicates a problem, tind and correct
the cause, then recheck the system.- lf all the input tests prove OK, substitute a
known-good control unit, and recheck the sys-
tem. lf the check is OK, the control unit must
be faulty; replace it.
NOTE: lf the shift lock solenoid clicks when the igni-
tion switch is turned ON (ll) and you step on the
brske Dedal (with the shift lever in E). the shift lock
system is electronically normal; if the shift lever
cannot be shifted from fl, test the 46 gear position
switch as described on page 23-142, and see sec-
tion 14.
Shift Lock System:
No. Wire Test condition
No. WireTest condition
Test: Desired resultPossible causs it result is not obtained
Test: Dcsired lesultPossible cause it result is not obtainsd
INTERLOCK CONTROL UNIT
GRN/wHT2
1WHT/RED
lgnition switch ON (ll)
Brake pedal pushed
Check for voltage to ground:
There should be battery voltage
Blown No. 52 {20 A) fuse in the
under-hood fuse/relaY box
Faulty transmission control module
(TCM)
Faulty ECM
Faulty brake switch
Faulty throttle position (TP) sensor
An open in the wire
lgnition switch ON (ll)
Brake pedal and
accelerator pushed at
the same me
Check for voltage to ground:
There should be less than
battery voltage.
tGRN/WHT'
Shift lever in position
E
Check tor continuity to ground:
There should be continuity.
Faulty A/T gear position switch
Poor ground {G20'1 , G401)
An open in the wire
3YEL/BLK
lgnition switch ON (ll)Check for voltage to ground:
There should be battery voltage
Blown No. 25 (7.5 A) fuse in the
under-dash fuse/relay box
Faulty shift lock solenoid
An open in the wire
Key Int€rlock Systcm:
BLKUnder all conditionsCheck lor continuity to ground:
There should be continuitY.
. Poor ground (G201, G401). An open in the wire
GRNiWHT'
Shift lever in position
E
Check for continuity to ground:
There should be continuity.
Faulty A/T gear position switch
Poor ground {G2O1, G401 }
An open in the wire
3
WHT/YELlgnition switch turned
to ACC (l) and the key
pushed in
Check tor voltage to ground:
There should be battery voltage.
Blown No. 52 (20 A) fuse in the
under-hood fuse/relaY box
Faulty steering lock assemblY
(key interlock solenoidl
An open in the wireWHT/BLU
4WHT/BLK
Shift lever in position
E and push button
pressed
Check for continuity to ground:
There should be continuity.
Faulty pafking pin switch
Poor ground (G2O1, G4O 1)
An open in the wire
Shift lever in position
E and push button
reteaseo
Check for continuity to ground:
There should be no continuity.
Faulty parking pin switch
Short to ground
An open in the wire
I'
23-149

Circuit Diagram
J
WNT/BLK +WHT
BLKYEL YEL/8LU
CABLEREEL
SET/BESUME1 SW]TCH
J
IGNITONCONTROLMODULE(cM)
LT
B lA
i,"'YlDGBY
c
IT GRN/RED LTGRN/BLK
BLK
I
:
:2013401
III
I
VEHICLE SPEEDSENSOR (VSS)
M/T: CLLTCH SWITCH \A/T:A,TGEARPostT oN swrc!(oN E].tr tr
8LK 8LK
lltl-0-_L-- --
G301 G2AlG401
UNDER-HOOD FUSEiFELAY BOXUNDEF DASH FUSEi RELAY BOX
lNDICATORL]GHT(0.91W)
BLU/RED
23-255
:?:'
ACC : ACCELERATIONOEC iDECELERATION

Cruise Control
- Control Unit InputTest(cont'dl
IBLKUnder all conditionsCheck for continuity to ground:
There should be continuity.
. Poor ground (G20l, G401). An open in the wire
2BLK/YEL
lgnition switch ON {ll}Check for voltage to ground:
There should be battery voltage.
. Blown No. l4 (7.5 Alfuse in the
under-dash fuse/relay box. An open in the wire
3LT GRNlgnition switch ON (ll)
and main switch ON
Check for voltage to ground:
There should be battery voltage.
. Faulty main swjtch. An open in the wire
GRY
lgnition switch ON (ll),
main switch ON and
brake pedal pushed,
then released
Check for voltage to ground:
There should be O V with the
pedal pushed and battery
voltage with the pedal released.
. Faulty brake switch. An open in the wire
5GRN/WHT
Brake pedal pushed,
then released
Check for voltage to ground:
There should be battery voltage
with the pedal pushed, and 0 V
with the pedal released.
Blown No. 52 (20 A)fuse in the
under-hood fuse/relay box
Faulty brake switch
An open in the wire
6RED/BLU
lgnition switch ON (ll)Connect to ground: lndicator
light in the gauge assembly
comes on.
Blown bulb
Blown No. 25 (7.5 A)fuse in the
under-dash fuse/relay box
Faulty dimming circuit in the gauge
assembly
An open in the wire
7LT GRN/
BLK
RESUME button
pushed
Check tor voltage to ground:
There should be battery voltage.
Faulty SET/RESUME switch
Faulty cable reel
An open in the wire8LT GRN/
RED
SET button pushed
IPNK
MT/: Clutch pedal
released
A/Tr Shift lever in [2l,
[Dl]. o, [o'l
-
Check for continuity to ground:
There should be continuity.
NOTE: There should be no con-
tinuity when the clutch pedal is
depressed or when the shift
lever is in other positions.
Faulty or misadjusted clutch switch(M/T)
Faulty A/T gear position switch(A/T)
Poor ground (G201,G401)
An open in the wire
't0BLUStart the engine.Check lor voltage to ground:
There should be voltage.
. Faulty ignition system or ECM. An open in the wire
't1ORN
lgnition switch ON (ll)
and main switch ON;
raase the front of the
car, rotate one wheel
slowly.
Check for voltage between the
ORN @ and BLK O terminals:
There should be 0- about
5 V-O- about 5 V repeatedly.
. Faulty vehicle speed sensor {VSS). An open in the wire
BRN/WHTConnect battery power
to the BRN/WHT
terminal and ground to
the BRN/BLK terminal.
Check the sound of the actuator
motor: You should hear the mo-
tor running smoothly.
. Faulty actuator. An open in the wire
BRNi BLK
Connect battery power
to the BRN/RED
Iermrnal.
Check the operation of the mag-
netic clutch: Clutch should click
and output link should be locked.
Faulty actuator
An open in the wire
Poor ground (G30'l)
No. Wire Test conditionTest: Desiled result Possible cause il lesult is not obtained
' 4 I BRN/RED
{
{
23-258
-L

!
Gomponent/Wiring Locations Index
SRS INDICATOR LIGHT(ln the gauge assembly)Troubleshooting, page 23-287Gauge assembly, page 23-126
To HORN SWITCH
CABLE REELReplacement,page 23-322
DRIVER'S AIRBAGReplacement. page 23-317Disposal, page 23-320To DRIVER'S AIRBAG
DASHBOARD WIRE HARNESSFRONT PASSENGER'SAIRBAGBeplacement, page 23-317Disposal, page 23-320
to SRS INDICATOR LIGHT in GAUGE ASSEMBLY5P CONNECTOR
SRS MAIN HARNESSTo MAINWIRE HARNESS3P CONNECTOR
SRS MAINHARNESSto UNDER-DASHFUSE/RELAYBOX2P CONNECTOR
HARNESSto FRONT PASSENGERS AIRBAG2P CONNECTOR
SRS MAIN
SERVICE CHECXCONNECTOR {2PIIBRNAAIHT, BLK]to CABLE REEL2P CONNECTOR
MAIN WIRE HARNESSto DASHBOARD WIREHARNESS16P CONNECTOR
ERASE SIGNAL (MES}SRS UNITGBOUNOSRS MAIN HARNESSSRS UNIT(lncluding safing sensorano rmpact sensor)R6placement, page 23-326
2P CONNECTORSRS MAIN HARNESSto SRS UNIT18P CONNECTOR
S\--0
[GRN, GRNI or IWHT, BLKI
23-27A

Description
I
J)
)
'\' '\, ili \.-.-1 i^\\,,; i \
The SRS is a safetv device which, when used in coniunction with the seat belt, is designed to help protect the driver and
front passenger in a frontal impact exceeding a cenain set limit. The system consists ot the SRS unit (including safing sen-
sor and imDact sensor), the cable reel, the driver's airbag, and front passenger's airbag
Operation t'Its
The main circuit in the SRS unit senses and judges the force ot impact and, il necessary, ignites the inflator charges. If bat-
tery voltage is too low or power is disconnected due to the impact, the back-up power circuii will keep voltage at a con-
stant level.
For the SRS to operate:
(1) The impact sensor and safing sensor must activate and send electric signals to lhe mictop.Goi
{2) The microprocessor must compute the signals and send signals to the airbag inflators'
(3) The inflators must ignite and deploy the airbags sE Lr.r
UNDER DASHFUSE/RELAYBOX
Dnftr sAtacranroq
IIMPACT I ] )
F80t{TPASSEI{GEffSAIRSAGINFLAIOR
Drc MES SCS rDC
Self-diagnosis System
A self-diagnosis circuit is built into the sRs unit; when the ignition switch is turned oN (ll), the sRS indicator light comes
on and goes off after about six seconds if the system is operating normally'
lf the light does not come on, or does not go off after six seconds, or if it comes on while driving. it indicates an abnormal-
ity in the system. The system must be inspected and repaired as soon as possible'
For better servicesbility. the memory will store the cause of the malfunction, and the data link circuit passes on the infor-
mation from the memory to the data link connector (DLC). This information can be read with the Honda PGM Tester con-
nected to the DLc (16P).
23-279
J

).1
Contents
How to Use This l\.4anual 1Circuit Schematics (see Circuit Index)Fuse/Relaylnformation 6ComponentLocation Photographs 201
Connector Cavity Numbers 202Connectorldentification 203
Ground-to-Components Index 6-6Wire Harness Routing 203Circuit ldentification lor ln-Line and Fuse Box Connectors
Circuit Index
Air conditionerAir delivery 61Blower controls 60Compressor controls 62Fans 63Anti-lock brake system (ABS) 44A/T gear position indicator 89Automatic transmission controls'98199 models 39'00 models 39-4Back-up lightsHatchback 110Sedan 110- 1Brake system indicator light
USA 71Canada 71-1Brake lightsHatchback 110-6Sedan 110-7Cargo area light (Hatchback) 114-3Ceiling light 114-2Charging system 22Cigarette lighter 155
Clock 154Condenser fan 63Console lights 114Cruise control 34Dash lights 1 14Daytime running lights 110-8Door open indicator 114-2Engine coolant temperature gauge 81Engine oil pressure indicator light 72Fog lights 110-14Front parking lights 110-11Front side marker lights 110-11Fuel gauge 81Fuse/relay boxUnder-dash 6Under-hood 6-3Under-hood ABS 6-5Gauges 81Glove box light 114Ground distribution 14Ground-to-Componentsindex 6-6Hatch open indicator '114-3
Hatch opener '134
Hazard warning lightsHatchback 'l l0-2Sedan 110-4Headlights 1'10-8Headlight switch 100HeaterAir delivery 61Blower controls 60Fanswith A,/C 63without A,/C 63-2Horns 40lgnilion key reminder 73lgnition system 20
204
lmmobilizer system ('00 model) 132lndicators 80Integrated control unit 70Interlock system'98199 models 138'00 models 138-1License plate lightsHatchback 110-12Sedan 110-13Lights-on reminder 73Low fuel indicator light 74l\,4aintenance reminder light 83l\iloonroof 122Odometer 81-1Power antenna 151Power distributionBattery to ignilion switch, fuses, and relays
Fuses to relays and components 10-2Power door locksHatchback '130
Sedan 130-2Power mirrorsHatchback 141Sedan 141-1Power windowsHatchback 120Sedan 120-2Programmed fuel injection system (PGM-Fl)'98199 models 23'00 models 24Radiator fanwith tuC 63without A,/C 63-2Rear parking lightsHatchback 110-12Sedan 110- 13Rear window defogger 64Seat belt reminder 73Security system 133Speedometer Il-1Spotlights 114-2Starting syslemAutomalictransmission 21l\.4anualtransmission 21-1Stereo sound system 150Supplemental restraint system (SRS) 47Tachometer 81- 1TaillightsHatchback 110-12Sedan 110-13Trailer lighting conneclor 118Trunk lid open indicator 114-3Trunk light (Sedan) 114-3Turn signal lightsHatchback 110-2Sedan 110-4Vehicle speed sensor (VSS) 33Wiper/washerFront 91Rear 92
10
).1
I
Xr
12Fg oAmerican Honda Motor Co., Inc. - All Rights Reserved Service Communications 275 pages

How To Use This Manual
Component Locations
To see where a component or connector is located on the car, look up its photo number in the
Component Location section in the back of the book. The photo will also tell you the color of
the connector. and how manv cavities it has.
VEHICLESPEEDSENSOR (VSS)
ENGINECONTROLUNIT (ECMPHOIO 8A
0,, I
tl
tl
'r"'
To see where
connectors and parts
are located, look up
their photos in the
Component
Location section.
r -.I GAUGE
| | ASSEMBLY I
rtlL-J L-
r -'l
ll
ll
O,(
ot(
il"l,*.I CRUISE
I CoNTROL
i"u,t',:..
lf there is no photo number below or beside a connector, ground, or terminal number, look up
that connector, ground, or terminal number in the appropriate Connector ldentification Chart.
The chart will tell you the color of a connector, how many cavities it has, where it's located,
and what component or harness it connects to. On the page opposite that chart you'll find an
illustration of the related harness.
Connector ld6nlillcallon and Wire Harness Rouling tconrd)
SEAT WIFEHAFNESS
c712lf a connector on a
schematic has no
photo number, look it
up in the Connector
ldentification chart.
c297
203-15203-14
t-

Circuit ldentification for In'Line and Fuse Box Connectors
tuse the chart (on page 204, sample below) to help diagnose multiple symptoms in separate
circuits which could be caused by a single problem in a connect,oishared by those circuits'
Here's how that chart could help you find such a problem:
1. Pick one of the multiple symptoms and look up the schematic for that circuit'
2. Make a list of all in-lrne and fuse box connectors in that schematic (include page numbers).
3. Then, in the chart, look up each connector on your list to see if circuits related to the other
symptoms run through one of them. lf they do, inspect that connector for the problem.
Example: The horn, A,/C, and the right headlight don't work. List all in-line and fuse box
connectors in the horn circuit and then check the chart (sample below). You find that C211 is
common to the A,/C circuit and the headlight circuit, so you inspect c211 and find the problem:
bent terminals.
)Connector
(6 or more
cavities)
Numbel of
Cavities - Color
1O-GRY
I 12-GRY
I
Wire
Harnesses
I Main/ | ComP er 'ror c.ntrols,
I Dashboard I
Circuits
Ant!lock brake system (ABS), Cruise control,
Programmed {uel injection system (PGM-FD
!ngrnei
lvlain
lgnition system
Antilock brake system (ABS), BIower controls, Fans,
Wiper/washer
lgnition system, Starting system
Blower controls, Compressor controls, Headlights'
Horns, Vehicle speed sensor (VSS), Wiper/washer
Programmed fuel injection system (PGM-Fl)'
Starting system
Engine/ |Main I
)

Fuse
NumberFuse NameAmpsPagecomponent or circuit Protected
(POWER
DOOR LOCK)
(RR WIPER
RR WASHER)
R _ HEAD LIGHT
HIGH BEAM
j 1o-2Power door lock control unit
10-2 | Rear wiper
I
tto-e i onLcontrol unit (Canada), Right headlight
L _ HEAD LIGHT
HIGH BEAM
(POWER WINDOW
RR-L)
i 1 10-8i DRL control unit (Canada), High beam indicator light,
i Left headlight
1 0-1Not used
| 1zo-z
I
I Left rear window motor
| (lGN colL)| 15
(POWER WINDOW
FR-R)
(POWEB WINDOW
FR-L)
I Right rear window molor
I
Front passenger's window motol
Driver's window motor
| 120-2
i120 (H/B)
iot 120-2
l(Sedan)
i120 (H/B)
l0:120 ?
IJ13
TURN LIGHTS
FUEL PUMP
(SRS UNIT)
(Sedan)
'lo-2Hazard warning switch
1O-2 | PGM-FI main relay, SRS unit
I
14I (cRUlsE coNTRoL) | 7.510-3 | Cruise control
ALTERNATOR
SP SENSOR
7.510-3Alternator, ECM or PCM ('00 Model), ELD unit,
Gauge assembly, PGM-Fl, TCM ('98-'99 Modelwith A/f),
Vehicle speed sensor
i REAR DEFBOSTER ii RELAY i
10-6i ABS control unit, Rear window defogger
I HEATER A/C
: RELAY
fuC compressor controls, Air delivery, Blower controls,
Fans. Power mirrors
I tnururutruc ucxr I z.s
I otrt av I
I DRL control unit (Canada)10-6
I BACK UP LIGHTS | 7.s | 10-4 I Back-up lights
t
(RUNNTNG LTGHTS) ii DRL control unit (Canada)
(cont'd)
19
6-1