HONDA INTEGRA 1998 4.G Workshop Manual

)
Troubleshooting
Self-diagnostic Procedures
The self-diagnostic function of the SRS system allows it to locate the causes of system problems and to store this informa-
tion in memorv. For easier troubleshooting, this data can be retrieved via 8 dats link circuit.
o When you turn the ignition switch ON (ll), the SRS indicator will come on. lf it goes off after six seconds, the system is
normat.
. lf there is 8n abnormality, the system locstes and defines the problem, stores this information in memory, and turns
th€ SRS indicator light on. The data will remain In the memory even when the ignition switch is turned off or if the bat-
terv is disconnected.
. When you connect the SCS service connector to the service check connector (2P), and turn the ignition switch ON {ll),
the sRs indicator light will indicate the diagnostic trouble code (DTCI by th€ number of blinks.
. After reading and recording the DTC, proceed with the troubleshooting for this code
Pr6crution!
. Use only a digital multimeter to check the system, lf it's not a Honda multimeter, make sure its output is 10 mA (0.01 A)
or less when switched to the smallest value in the ohmmeter range. A tester with a higher output could damsge the
airbag circuit or cause sccidental airbag deployment and possible injury.
. Whenever the ignition switch is ON (ll), or has been turned OFF for less than three
SRS unit; the airbags could accidentally deploy and cause damage or injuries'
. Before you remove the SRS main harness, disconnect the driver's airbag connector
conneclor.
and the front passenger's airbag
. Make sure the battery is sufficiently charged (s6e psge 23-67). lf the battsry is dead or low, msasuring values won't be
correct,
a Do not touch a tester probe to the terminals in the SRS unit or harness connectors, and do not connect the terminals
with a jumper wire. Use only the backprobe set and the SCS service connector.
For backprobing spring-loaded lock type connectors, refer to psge 23-283.
Reading the DTC
When the SRS indicator light is on, read the DTC using one ot th"sc rn"ihod<
A. Connect the Honda PGM Toster io the 16P D![! Linl Con.lac{or {DLC), tnd toalor nl -r t!'iF t tr -
indicat$ no DTC, or it indicates DTC $1 or DTC $2. doublechcd( b'Y iumdng $. !..vic. chd cdrE r€ --t
ing the SRS indicator light (see next p89€).
{cont'd)
minutes, be careful not to bump the
DATA LINK CONNECTOR (16P}
23-247
HONDA PGM TESTER

v
-t f--.l r --1 f-M.in cod. {11 S!b{od. (2}
oTcr2
-l F --{ FMain cod. (l) Sub-cod.11).--.Y-oTc r-rThnd'm6r.@6m
2
ON
light sl.ys on h ct36 or
Troubleshooting
Reading the DTC (cont'd)
B. The SRS indicator light can also indicate the OTC by the number of blinks when the SCS service connector ts connect-ed to the service check connector (2P).
1. Turn the ignition switch OFF, and wait for ten seconds. Then connect the SCS service connector to the service checkconnector (2P). lf you do not wait ten seconds, the SRS unit will not be completelv reset and will not outout DTCS.SRS INDICATOR LIGHT
scs SERV|CECONI{ECTOR- (x)l01(x)
SERVICE CHECKCONNECTOR (2PI
2. Turn the ignition swilch ON (ll). The SRS indicator light comes on for about six seconds and then goes off. Then it will
indicate the DTC:- The DTC consists of a main code and a sub-code.- Including the most recent problem, up to three different malfunctions can be indicated.- ln case of a continuous failure, the DTC will be indicated repeatedly (see example 1 below).- In case of an intermiftent failure, the SRS indicator light will indicate the DTC one time. then it will stay on (see exarn-ple 2 beiow).- lf both a continuous and an intermittent failure occur, both DTCS will be indicated as continuous failures.- In case the system is normal (no DTC), the SRS indicator light will stay on {see example 3).
3. Read the DTC.
4. Turn the ignition switch OFF, and wait for ten seconds. Then disconnect the SCS service connector from the servicecheck connector (2P),
Examples ol DTC Indications:
L Continuous failure, SRS Indicator Light is:0.3 s 0.3s 0.3 s-]-]-l-t-
07?M
(S./'
\
-l Mlin cod. r
orc 2-1Mo3t r.cant probt.m
Intermittent failure, SRS Indicator Light is:
Normsl (no failure), SRS Indicator Light is:
oTc 5,r

)
Erasing the DTC Memory
To erase the DTC(S) from the SRS unit, use a Honda
PGM tester (see the Honda PGM Tester SRS vehicle
System Supplement) or the following procedure.
1. Make sure the ignition switch is OFF.
2. Connect the SCS service connector to the MES con-
nector (2P). Do not use a jumper wlre.
MEMORY EMSESIGNAL {MESI CONNESTOR I2P)
[GRN, GBNI or IWHT, BLKI
Turn the ignition switch ON (ll).
The SBS indicator light comes on for about six sec-
onds and goes off. Remove the SCS service connec-
tor from the MES connector (2P) within four seconds
after the SRS indicator light went off.
The SRS indicator light comes on again. Reconnect
the scs service connector to the MES connector
(2P) within the four seconds after the SRS indicator
light comes on.
The SRS indicator light goes off. Remove the SCS
service connector from the MES connector (2P)
within four seconds.
The SRS indicator light indicates that the memory is
erased by blinking two times.
Turn the ignition switch OFF. and wait for ten sec-
onos.
Troubleshootin g Intermittent
Failures
lf the.e was a malfunction, but it doesn't recur, it will be
stored in the memory as an intermittent failure, and the
SRS indicator light comes on,
Atter chocking ths DTC, troubleshoot as follows:
1. Read the DTC (see "Reading the DTC").
2. Erase the DTC memory (see "Erasing the DTC
Memory").
3. With the shift l€ver in neutral, turn the ignition switch
ON (ll), and let the engine idle.
4. The SRS indicator light comes on for about six sec-
onds and then goes off.
I o"* 1--
ONllI
Shake the wire harness and the connector, take a test
drive (quick acceleration, quick braking, cornering),
and turn the steering wheel fully left and righi, and
hold I there for fve to ten s€conds lo 6nd tt|e caus€
of the intermnem farlure
It lhe problem .!curs, lha SRS nd'calor r'ghl will
$aY on.
,l soc or less
Problem recurs, Iight stays on
lf vou can't duplicate the intermittent failure, the sys-
tem is OK at this time.SRS indic.lollight
MESconnaclottarrninlll
CONNECTED
DISCONNECTED
23-289

Troubleshooting
Diagnostic TroubleCode(DTC}Chart
SBS indicato. lightDTCPossible caug€Co.rective actionSee page
doesn't come onnone
{doesn't
come on)
Faulty SRS indicator light circuitTroubleshooting23-293
comes on
none*3
{doesn'tgo off)
Faulty SRS indicator light circuit, internal
failure of SRS unit, faulty SRS power supply(VB line)
Troubleshooting
'l -1Open in the driver's airbag inflator
Troubleshooting
23-301
Increased resistance in the driver's airbag
inflator23-301
1-3Short to another wire in the driver's airbao
inflato. or decreased .esistance23-303
1-4Shon to power in the driver's airbag inflator23-305
't-5Short to ground in the driver's airbag inflator23-301
2-1Open in the passenger's airbag inflator
Troubleshooting
23-309
Increased resistance in the passenger's airbag
inflator23-309
Short to another wire in the passenger's
airbag inflator or decreased resistance23-311
Short to power in the passenger's airbag
inflator23-313
z-JShort to ground in the passenger's airbag
inflator
23-290
t-
I

sRs indicaror light I DTcPossible causeCorrective actionSee page
comes on
5,1
5-2
lnternal failure of the SRS unitSRS unit replace-
ment23-326
5-4
6-1
lnternal failure of the SRS 0nitSRS unit replace-
ment23-326
6-2
6-4
lnternal Iailure of the SRS unitSRS unir replac€-
menlll Jzo't -2
7-3
23326
8-l
lnternal failure of the SRS unitSRS unit replace-
menra-2
lnternal failure ot the SRS unitSRS unit replace-
ment23-326
9-2*2*x
10-1
lnternal failure of the SRS unitSRS unit replace-
ment23-326
SRS airbags deployed (SRS unit must be
replaced)
SRS unit replace-
menl
*1: ln case of an intermittent failure DTC 9-1. it means there was an internal failure of the SRS unit or a faulty SRS indica-
)
tor light circuit. Do the troubleshooting for intermittent failures (see page 23-289)
*2: ln case of an intermittent failure DTC 9-2, it means there was an internal failure ot the power supply (VB line). Do the
troubleshooting for intermittent failures (see page 23-289).*3: DTC cannot be read with a Honda PGM Tester; check by iumping the SCS service connector'
23-291

Troubleshooting
SRS Indicator Light Wire Connections
SRS Indicator Light Power Circuit
To UNDER-DASHFUSE/RELAY BOX2OP CONNECTOB
SRS Indicator Light Control Circuit
To SBS UNIT
iI
SRS MAIN HABNESS
C55'1, C557 : WIRE SIDE OF FEMALE TERMINALS
DASHBOARD WIRE HARNESS
MAIN WIRE HARNESS
C557 -+ To GAUGE ASSEMBLY
CiP7, C449 : TERMINAL SIDE OF MALE TERMINALSC553, CEo1. C802, C804: WIBE SIDE OF FEMALE TEFMINALS
DASHBOAND WIREHARNESS
To UNOEF-DASHFUSE/RELAY BOX2P CONNECTOR
C427 : MAIN WIRE HARNESS 3P CONNECTORC/r49 : MAIN WIBE HARNESS 16P CONNECTORC551 : DASHSOARD WIRE HARNESS 2Op CONNECTORC553 : DASHBOARD WIFE HARNESS t6P CONNECTORCssT : OASHBOARD WlnE HABNESS SP CONNECTOB
To GAUGE ASSEMBLY
C801 : SRS MAIN HARNESS 2P CONNECTOBC802 : SRS MAIN HARNESS 3P CONNECTORC804: SRS MAIN HAFNESS 18P CONNECTOR
BLU

The SRS Indicator Light Doesnt Come On
CAUTION: Whenever the ignition switch is ON (lll, ol
has been turned OFF tor lsss than three minutes. be
careful not to bump the SRS unit; the airbags could
accidentslly deploy and cause damage or iniuries.
Chcck tho power supply lfuso):Turn the ignition switch ON (ll), and check whether the other
indicator lights come on or not (brake system, etc.).
Do tho oth6J indicator ligh$ come on?
NO'ES
Check ths tuse:Check the No. 25 (7.5 Ai fuse in the under dash fuse/relayho!
ls th. tu.o OK?
YESNO
Chsck the bulb:Replace the No. 25 17.5 A) fuse, and check that the
SRS indicator light comes on.
Doos tho SRS indic.lor light como on?
YES
END
Ch.ck th6 wir€ ham€ls b€twoen fu3e snd gauge .3sembly:
Check for an open in the wire harness belween tuse
No. 25 (7.5 A) and the gauge sssembly, and repair. Check
that the sRS indicator light comes on.
Doo3 the SRS indicator light come on?
YES
NO
NO
END
Ch6ck tho SRS indicator light bulb:
1. Turn the ignition switch OFF.2. Remove the gauge assemblY3. Check tor blown SRS indicator light bulb.
b tho sRs indicrlor light bulb oK?
YESNO
Check tho SRS indicator ligln circuit:ReDlace the bulb, and reconnect the gauge assembly
connectors. Then turn the ignition switch ON (ll).
Do.s tho SRS indicrtor light comG on?
I vrs NoII
END
No. 25 lt.5 Al FUSE
{A)fo page 23-294
(B)
10 page 23-294(cont'd)

Troubleshooting
The SRS Indicator Light Doesnt Come On (cont'd)
From page 23-293
(B)
Ch.cl th. SRS indicator light circuit:1. Disconnect the dashboard wire harness 5P connector fromthe gauge assembly.2. Connect a voltmeter belween the No. 5 terminal (+) ofthe 5P connoctor and ground.3. Turn the ignition switch ON {ll}, and measure voltage.
ls the.e 8.5 V or less for six 3econd! rflor lho ignitionswitch h.s be6n turned ON llll?
YESNO
Faulty SRS indicstor light circuit in ihe gtugoassembly; r€pl.co tho SRS printed circuit board inthe gaug. assembly.
Check the wiro ham.ss of tho SRS indicltor light circuh ll l:1. Turn the ignition switch OFF.2. Disconnect the main wire harn€ss 16P connector lromthe dashboard wire harness.3. Connect a voltmeter betlveen the No. 15 torminal {+) ofthe main wire harness 16P connector and ground.4. Turn the ignition ON (ll), and measure voltage.
13 there 8,5 V or lc.r tor 3lx s.condr lftor th. ignitionswitch h.3 boon tuJnod ON llll?
Short to powor In th. BLU wiro ot ths d$hbolrd whahrmess; ropair the hsmo*1.
To pag€ 23-295
DASHBOARD WINE HAR ESS16P CONNECTOR
MAIN WIRE HARI{ESS16P CONNECTOR
From page 23-293
DASHBOAND VUIRC HARNESS5P CONNECTOB
DASHBOARD WIRE HARI{ESS5P CONNECTOR
23-294

Chocktho wire h.mcas ol thc SRS Indicrtor light clrcuh l2):1. Turn the ignition switch OFF.2. Disconnect the SRS main harn€ss 3P connoctor from the
main wire harness.3. Connect a voltmeter between the No. '1 terminal {+)oltheSRS main harness 3P connector and ground,1. Turn the ignhion switch ON {ll), and measure voltag€
Ir th.rc 8.5 V or 16 toa aar t cord! tftcr rh. ignhion twitch
Shon to pow.r in th. BLU wi.o of lh. m.ln wir. h.r'
MAIN WIRE HAFNESS3P CONNECTOR
SAS MAIN HARNESSt @aa-cTof,
SRa m t{ ruE3P OOt{tCClc
)
c&
Wire sid6 of lemrla tarminaL
n00m.l I
Ch€ck lh. wir. h.rn.r. of thc SRS indic.tor circuit l3l:
1. Tlrn the ignition switch OFF.2. Oisconnoct the b8ttery negativ€ cable, then the positivo
cable, and wait throe ftinutes.
3. Disconnect the driver's airbag and front passenger's
airbag connectors (see page 23-285t'
4. Disconnect the SRS main harness 18P connector trom tho
SRS unit.5. Fsconnect the battery Dositivo cable, th€n reconnect th€
negative cable.6. Connect a voltmeter bettve€n the No. 6 terminal (+) of
th6 SRS main harness 18P connector and ground.
7. Turn the ignition switch ON (ll), and moasuro voltage.
Th€r6 should be 0.5 V or less
lr voltlsr .3 !9.cifi.d?
YESNO
F.ulty SRS unit; .cplrct th. unh {... prg. 23'326).
Shon to powe. in the SRS mrin hrtne*t taplrc.lha hmaat.
SRS UJ{'T
Wke side of temale terminals
23-295

Troubleshooting
The SRS Indicator Light Doesnt Go Off
CAUTIOi{: Whenever the ignition switch is ON (ll). or
h.s bGGn turned OFF for less than three minutes. be
crrclul noi to bump the SRS unit; the airbags could
lcci{tcntrlly deploy and cause damage or iniuries.
(A)
1o page 23-297
Try to reproduce the SRS indic.tor l;ght;l. Erase the DTC memory (see page 23-289).2. Turn the ignition switch ON (ll), and check that the SRSandicator light comes on lor about six seconds and thenooes off,
Ooes the SRS indicetor light stay on?
NOYES
Intermittc t failu.e, sydem is OK dt this time. Sec Troublo-shooting lntermitteirt Failuros on p.qe 23-28!1.
Check tho No. 23 {10 A) fuse:1. Turn the ignition switch OFF-2. Check for blown No. 23 110 A) fuse in the unde.dashfuse/relay box.
ls the luse OK?
YESNO
Roplsce the f!se, and eresc the memory1. Replace the No. 23 (10 Alfuse.2. Erase the DTC memory (see page 23-289).3. Turn the ignition switch ON (ll).
Does th6 SRS indicator light go off after rix socond6?
I YEs No
I
ENO
Contilm the DTC, and continuo troubleshooting.
Check tor an open in ths SRS main hlrna3r (VB tinc):1- Disconnect the battery negative cable. thon disconnectthe positive cable, and wait tor three mrnures.2. Disconnect the driver's and front passenger's airbag con-nector (see page 23 285).3. Disconnect the SRS main harness 18P connector fromthe SRS unit.a. Reconnect the battery positive cable, then reconnect thenegative cable.5. Connect a voltmeter between the No. 3 terminal (+) otthe SRS main harness 18P connector and ground.6. Turn the ignition switch ON {ll).
ls th.re bettery vohaqe?
YES
Open in th. SRS msin h.rness (VB linc); roptrca tha
NO
No.23110 Al FUSEUNOER.DASHFUSE/RELAY AOX
SRS UNIT
SRS MAIN HARI{ESS 18P COI{I{ECTOR