sensor ACURA INTEGRA 1994 Service Owners Manual

Supplemental Restraint System (SRS)
Component Locirtion Index
UNDER.DASHFUSE/RELAY BOX
SRS INDICATOR LIGHT(ln th6 gaug6 assembly)Troubleshooting, page 23-276Gauge assembly, page 23-113
CABLE REELReplacement,page 23-301
AIRBAGBeplacement, page 23.295
SRS UNIT (lncluding cowl sensorl
SRS MAIN HARNESS-FRONT PASSENGER'S AIREAGBRANCH lExc€pt Caned. RS modol)
To CRUISE CONTROLSET/RESUME SWITCH
RIGHT DASH SENSORReplacement, page 23-305
FRONT PASSENGER'SAIRBAGlExcept Canads RS model)Replacement, page 23-295Disposal, page 23'299
LEFT DASH SENSORReplacement, page 23-305
23-266
Replacement, page 23-307

Supplemental Restraint System (SRSI
Wiring Locations
CAUnON: Make sure all SRS ground locrtion3 lrc clrln rnd ground3 tra |.curalv rltachad.
NOTE:
o Alt SRS electricsl wiring harnesses are covered with ysllow insulation.
. RsDlace the entire affected SRS harness assembly if it has an open circuit or damaged wiring.
CABIE REEL to DdrrEFS AnaAC3+ OOI{iECTOR
DASHBOARD WIRE HARNEi9to INDICATOB UGHT in GAUGE ASSEMBLY
5-P CONNECTOBaFs irA[t H^RiEssto FROiIT PASSEMIEFS Ana G3t coftf'Eclon
SRS MAIN HARNESS tO
MAIN WIRE HARNESS+P OONNECTOR
C. b Ra nod.ll
SnS Alt{ ll^ntc8s too sH SErson2+ OOt{tlEcT()R
SRS MAIN HARNESSto UNDER-DASHFUSE/RELAY BOX2"P @NNECTOR
MAIN WIRE HARNESSto DASHBOARD WIREHARNESSlGP CONNECTOR
SBS MAIN HARNESS toLEFT DASH SENSOR2.P CONNECTOA
23-270

- Dash sensors- Cable reel- SRS unit
General Precautions
Carefully inspect any SRS part before you install it.Do not install any part that shows signs of beingdropped or improperly handled, such as dents, cracksor deformation:
- Airbag assembly {driver's and front passenger's)
Airbag Handling and Storage
Do not try to disassemble the airbag assembly. lt has noserviceable parts. Once an airbag has been operated(deployed), it cannot be repaired or reuseo.
For temporary storage of the airbag assembly duringservice, please observe the following precautions:
. Store the removed airbag assembly with the pad sur-face up.
!@ It the airbag is impropsrty stored facsdown, accidental deployment could propel the unit withenough force to cause setious iniury
Store the removed airbag assembly on a secure flatsufface away from any high heat source (exceeding
212"Fl1OO'Cl and free of any oil. grease, detergent or
CAUTION: lmproper handling or storage can internallydamage the airbag assembly, making it inoperativ€.ll you suspect the airbag assembly has been damagod,install a new unit and rgler to the Deployment/DigposalProcedures lor disposing of the dsmaged airbag.
Use only a digital multimeter to check the system. lfit's not a Honda multimeter make sure its output is 10mA (0.01 A) or less when switched to the smallestvalue in the ohmmeter range. A tester with a higheroutput could damage the airbag circuit or cause accidental deployment and possible injury.
Do not install used SRS parts from another car. Whenmaking SRS repai.s, use only new pans.
Except when performing electrical inspections,always disconnect both the negative cable and posi-
tive cable at the battery before beginning work.
Replacement of the combination light andwiper/washer switches and cruise control switch canbe done without removing the steering wheell
- Combination light and wiper/washer switchreplacement (see page 23-160).- Cruise control sevresume switch replacement {seepage 23-2491 .
The original radio has a coded theft protection circuit.Be sure to get the customer's code number beforedisconnecting the battery.
When reinstalling the SRS unit cover, be sure it snapstogether properly.
SHORT CONNECTON {REDI
23-271

Sensor Inspection
CAUTION: Tak€ €xtra care whon painting or doing
body work in the ar€a bslow th6 dalhboard.
Avoid dirost exposure ot lh6 sonsors or wiring to hestguns, wolding, or spraying equipmont.
Di3connact both the nogativo and po3itivo b!ftery
cable3.
Connsct tho short conneclor(s) before working
bslow the da3hboard or nsar lhe dash sen3o.3.
After any degree of frontal body damage, inspect
both dash sensors. Replace a sensor if it is dented,
cracked, or deformed.
DASH SENSOR
a Be sure the sensors are installed securelv,
Inspection After Deployment
After a collision in which the airbags were deployed.
inspect the following:
1. Inspect the dash sensors for physical damage.
lf the sensors are damaged, replace them.
2. Inspect all the SRS wire harnesses, ReDlace, don'trepair, any damaged harnesses.
3. Inspect the cable reel for heat damage. lf there is
any damage. replace the cable reel.
4. After the car is completely repaired. turn the igni-tion switch on. lf the SRS indicator light comes onfor about six seconds and then goes off, the SRS
system is OK. lf the indicator light does not functionproperly, go to SRS Troubleshooting (next page).
BOLTS
23-275

Supplemental Restraint System (SRSI
Troubleshooting
Self-diagnosis Function
The SRS unit includes a self-diagnosis function. lf there
is a failure in the sensors. SRS unit, inflator, or their cir-
cuits, the SRS indicator light in the gauge sssembly
comes ON.
As a system check, the SRS indicator light also comes
on when the ignition is first turned ON to the (ll) posi-
tion. lf the light goes off after approximately six sec-
onds, the system is OK.
lf the SRS indicator lighr remains on (or fails to come on
in the system check mode), one of the SRS components
(or the wiring/connectors inbetween) is laulty
Troubleshooting Precautions
a Always use the test harness. Do not use test probes
directly on component connector terminals or wires;
you may damage them or the SRS unit.
a When connecting any of the test harnesses to the
system, push the connectors straight-in; do not bend
the connector terminals,
. Before disconnecting any part of the SRS wire har-
ness, connect the shon connector (RED) on the driv-
er's airbag. On cars equipped with a front passen-
ger's airbag, connect short connectors on the driver's
airbag and the front passenger's airbag.
SRS Indicator Light Troubleshooting
Possiblo conditions:
1. SRS indicator light does not come on at all - see
page 23-278.
2. SRS indicator light stays on constantly - see page
23-242.
3. SRS indicator light comes on in combination with a
failure of another electrical system (charging sys-
tem light). Check for damage/corrosion at the
under-dash tuse/relay box connector.
NOTE:
. Before starting the applicable troubleshooting. check
the condition of all SRS connectors and ground
points.
. lf the fault is not found after completing the applica-
ble troubleshooting, substitute a known-good SRS
unit and check whether the indicator light goes off.
23-276
MAIN HARNESS
Connecting the Short Connectors
@ To avoid.ccidental doploymont and pos.
siblo iniury. alway3 connect ths protoctive short con.
noctor to tha driver's airbag connectot and, on caf!
equippod with front passongor's airbag, conncqt Prolac-
tivs ghort connoctors to the d.ivsr's and tront passsn-
gar's airbag before working nsai any SRS wiring.
NOTE: The original radio has a coded theft protection
circuit. Be sure to get the customer's code number
before disconnecting the battery cables,
Disconnect the battery negative cable, then discon-
nect the oositive cable.
Connect the short connector(s) (RED):
Drivsr's Sido:
. Romove the accoss panel trom the steering
wheel, then remove the shon connector (BED)
1.
2.
from the panel.DRIVER'SAIRBAG
CABLE R€EL
3-P
ACCESSPANELSHONT CONNESTOR(REDI
. Disconnect the connector between the driver's
airbag and cable reel, then connect the short
connector {RED} to the airbag side of the connec-
tor.
Front Pas€ngo/s Sido:
. Remove the glove box damper (see section 20),
and then remove the glove box.
. Disconnect the connector between the front pas-
senger's airbag and SRS main harness, then con-
nect the short connector (RED) to the airbag side
of the connector,SHORT CONNECTOR

Check continuity between body ground and eachterminal of both dssh sensors.
TEST HARNESS Bo?MAZ - SFmSd)
. lf there iscontinuity at anyof theterminals, go tostep 12.
. lf thsre is no continuity at any terminal, go tosteo 13.
Disconnect the cable reel 6-p connector from theSRS main harn€ss, then connect Test Harness Conly to the cable reel side of the 6-p connector.
CABLE NEEL &P CONNECTOR
7.Check continuity between the No. 4 terminal andbody ground, and between the No. 5 terminal andbody ground.
TEST HABI{ESS C07LAiZ - SLIO:loo
lf there is continuity at either terminal, go to step8.
lf there is no continuity at either terminal, theSRS main harness is faulty. Replace it and re_chsck the voltages according to the chart onpage 23-283.
(cont'd)
23-285

12.Connect Test Harness D between the dash sensorand SRS main harness 2-P connector. Check conti-nuity between the No. 1 terminsl and body ground,
8nd between the No.2 terminal and body ground,
sRs MA[{HARNESS2-P OOTTNECTOR
TEST HARNESS Do?LAiZ - SL()a(xt
. lf there is continuity at either terminal, the dashsensor is faulty. Replace it and recheck the volt-ages according to the chan on page 23-293.
. lf there is no continuity at either terminal, theSRS main harness is faulty. Replace it andrecheck the voltages according to the chart onpage 23-283.
Measure the resistance between the l6ft dash sen-sor terminals B'12 and Bl6, and between the rightdash sensor terminals B4 and 86.
IEST HARNESS B07MAZ - SPqt500
TEST HARNESS DotlA:z - sl(,(x)
rffi-l
??
t'l
o lt rssistance is 3.8 - 4.2 kO for both sensors. theSRS unit is faulty. Substitute a known-good SRSunit €nd recheck the voltages according to th€chart on page 23-283.
o lf resistancs is l6ss thsn 3.8 kO for either sensor.go to step 14.
1il. Connect Test Harness D between the dash sensorand SRS inain harness 2-P connector. Measure theresastance between the No. 1 terminal and No. 2 ter-minal.
SRS MAINHARNESS2.P CONNECTOR
TEST HAR ESS D07LAZ - SL.{)a(xl
TEST XARNESS DotlA:z - sl4|)4tx)
lf resistance is 3.8 - 4.2 kO, the SRS main harnessis faulty. Replace it and recheck the voltagesaccording to the chan on pag€ 23-283.
lf resistance is less than 3.8 kO, the dash sensoris faulty. Replace it and recheck the vottagesaccording to the chart on psge 23-283.
(cont'd)
23-287

Supplemental Restraint System (SRS)
Troubleshooting (cont'd)
Modg C: Shon in one cowl son3ol, or open in both dash
sensors
Mode D: Open in ono da3h sensol
NOTE: The original radio has a coded theft protection
circuit. Be sure to get the customer's code number
before disconnecting the battery cables
1. Disconnect the battery negative cable and then the
positive cable. Then connect the short connector(s)
to the airbag(s) (see page 23'2721.
2. Connect Test Harness B between the SRS unit and
SRS main harness 18-P connector.
23-2AA
3. Measure the resistance between the left dash sen-
sor terminals 812 and 816, and between the right
dash sensor terminals 84 and 86.
lf resistance is more than 5 kO for eiiher set of
terminals, go to step 4.
lf resistance is less than 5 kO tor both sets of ter-
minals, the SRS unit is faulty. Substitute a
known-good SRS unit and recheck the voltages
according to the chart on page 23-283.

4.Connect T6st Harness D between the dash sensor
and SRS main harness 2-P connector.
Measure the resistance between the No. 1 terminal
and No. 2 terminal.
SBS MAINHARNESS2-P COI{NECTOR
TESTHARNESS DorlA:a - sl{tarx)
TEST HARI{ESS DOTLAZ - sl/to4{lo
lf resistance is more than 5 kO, the dash sensor is
faulty. Replace the dash sensor and recheck the
voltages according to the chart on page 23-283.
lf resistance is less than 5 kO, the SRS main har-
ness is faulty. Replace rhe SRS main harness and
recheck the voltages according to the chart onpage 23-283.
Mode E: Op€n in driver's airbag inflator or cable reel
NOTE: The original radio has a coded theft protection
circuit. Be sure to get the customer's code number
before disconnecting the baftery cables.
Disconnect the battery negative cable and then thepositive cable. Then connect the short connector(s)(RED)to the airbag(s) (see page 23-272).
Connect Test Harness I between the SRS unit and
SRS main harness l8-P connector.
sRs uNtt
Reconnect the driver's airbag connector, then mea-
sure the resistance between the 81 and the 87 ter,mr na ls.
TEST HARNESS Bo?MAZ - SP00500
lf resistance is more than 0.2 kO, go to step 4.
lf resistance is less than 0.2 kO, the SRS unit isfaulty. Substitute a known-good SRS unir andrecheck the voltages according to the chan onpage 23-283.
(cont'd)
23-289
; r.il M
1.
2.

Dash Sensor Replacement
GAUTION:
. Oo not drmrgc the sensor wiring.. Do not instrll used SBS part3 from anothor c!t,When repairing an SRS: use only new part3.o Roplaco. 3onsor it it is dented, crackod, or doform.od.
NOTE; The original radio has a coded theft protectioncircuit. 8e sure to get the customer,s code numberbefore disconnecting the b€ttery cabres,
1. Oisconnect the battery negative cable and then theposative cable.
2. Remove the glove box damper (see section 201.then remove the glove box.
SHOBT CONNECTORIREDI
3. Connect the short connector(s) to the airbag(s).
DRIVER'SAIRBAG
DRNEN'SANAAG3.P CONNECTORSHORTCONNECTORIREDI
SRS MAIN HARNESS
Remove the footrest driver,s side only and door sillmolding, then pull the carpet back, and remove thedash sensor protector. (Left side shownj right sideis similar.)
DASHPROTECTOR
5. Remove the two mounting bolts. then remove thedash ssnsor.
(cont'd)
DASH SENSOB
MOUNTIITG BOLTS
23-305