srs unit HONDA CIVIC 1996 6.G Repair Manual

Troubleshooting
The SRS Indicator Light Doesn't Go Off -'98 - 00 Models
CAUTION: Whenever the ignition switch is ON {ll}, orhas b66n turned OFF for less than three minutes, becareful not to bump the SRS unit; the airbags coutdaccidentally deploy and cause damage or iniuries.
No. 23 {10 Al FUSEFUSE/RELAY BOX
SRS MAIN HARNESS 18P CONNECTOR
Try to reproduce the SRS indic.tor light:1. Erase the DTC memory (see page 24-15).2. Turn the ignition switch ON (lt), and check that the SRSindicator light comes on for about six seconds and ooesol1.
Intormittent lailulo, systom is OK atthistime. Soo Troublel. o.mittgnl Failuros on paqe24-15.
Check the No. 23 (10 Alfuse:1. Turn the ignition switch OFF.2. Check for blown No. 23 (10 A) tuse in the under,dashfuse/relay box.
Replace ihe fus€, and 6.ase the momory1. Replace the No. 23 110 A) fuse.2. Erase the DTC memory (see page 24,15).3. Turn the ignition switch ON (ll).
Doos the SRS indicator light go off after 3ix second3?
Check tor an open in the SRS msin harness {VB lincl:1. Disconnect the battery negative cable, then disconnectthe positive cable, and wait tor three minutes.2. Disconnect the driver's (and front passenger,s) airbagconnector(s) (see page 24-11).3. Disconnect the SRS main harness 18p connector Iromthe sRs unit.4. Reconnect the battery positive cable, then reconnect thenegative cable.5. Connect a voltmeter between the No. 3 terminal (+) ofthe SRS main harness 18P connector ano qrouno.6. Turn the ignition switch ON {ll).
(A)
To page 24-35
24-34

)
From page 24-34(A)
SRS MAIN HARNESS I8P CONNECTOR
(B)
To page 24-36
1)
Wire sidg of lemale terminals
DASHBOARD WIRE HARNESS
5P CONNECTOR
ic)To page 21'31
DASHBOARD WIRE HARNESS
5P CONNECTOR
c508
t of lemale
(cont'd)
24-35
SRS MAIN HARNESS
Chock iho SRS unit:
Connect the SRS main harness 18P connector terminals No'
6 and No. 3 with a jumper wire and backprobe
Doos tho SRS indicator light go off?
Faulw SRS unit or poot co tact at the SRS ftain htmes!
18P connoctor; chack the connagtot.
ll tha connoctor b OK roplaca lho SRS unit'
oid tu3e No. 23 t10 A) blow?
Chcck for e short to ground in th. SRS indicator lighi cir-
cuh:1. Turn the ignition switch OFF
2. Disconneit the dashboard wire harness 5P connector
from the gauge assembly.
3. Check res-ista;ce between the No l terminai ofth€dash-
board wire harness 5P connector and ground There
should be '1 M0 or more.
Short to glound in th. gaugs aslomblY; .6plac' th' gtug'
JUMPEB WIRE
o!

Troubleshooting
The SRS Indicator Light Doesn't Go Off -'98 - 00 Models (cont'dl
From page 24 36(D)
Check the SRS indicetor circuit input voltage:1. Reconnect the SRS main harness l8P connector to theSRS unit.2. Connect a voltmeter between the No. 1 terminal (+) ofthe dashboard 5P connector and ground.3. Turn the ignition switch ON (ll), wait for six seconds,then measure voltage,
ls th€re 8.5 V or more?
YESNO
The problem has disapp€ared due to di3connecting andconneding the connectors. Be su.e all te.minals makegood contact, and recheck the system {see T.ouble-shooting Inte.miftent Failures on page 24-15).
Poor contact et the SRS main harnass 18p connactori checkthe connector,. ll the connector is OK, substitute a known-good SRS unit,and recheck.' It the problem is still present, replace the SRS main haFness.
From page 24-36
Check for an open in the dashboard wir6 harness:1. Disconnect the main wire harness 24P connector fromthe dashboard wire harness.2. Check resistance between the No. 6 terminal of the SRSmain harness 18P connector and No. 5 terminal of the mainwire harness 24P connector; there should be 0 - 1.0 0.
ls the resistance as 3pecitied?
YESNO
Open in the BLU wire ot the dashboard wire harness;repair the dashboard wire harness.
Check tor an open in the main wire haanoss:1. Disconnect the SRS main harness 3P connector from themain wire harness.2. Check resistance between the No. 6 termanal of the SRSmain harness 18P connector and No. 1 terminal of the SRSmain harness 3P connector; there sho!ld be O - l.O 0.
ls the resistance a! specified?
YESNO
Open in the BLU wire of the m.in wire ha.ness: .eoairthe main wire harness.
Open in the SFS main hrrness; replace the SRS main har-ness.
DASHBOARD WIRE HARNESS5P CONNECTOR
c508
Terminal side of male lerminals
SRS MAIN HARNESS18P CONNECTOR
c807
c41 l
SRS MAIN HARNESS18P CONNECTOR
cao2
SRS MAIN HARNESS3P CONNECTOR
24-38
\
DASHBOARD WIRE HARNESS

Troubleshooting
No DTG -'98 - 00 Models (cont'dl
trom page 24 39
SRS MAIN HARNESS2P CONNECTOB
SRS MAIN HARTESS18P CONNECTOR
FUSE/RELAY BOX
c807
c807
Wir€ side ot fsmaleterminals
SRS MAIN HAR ESSlAP CONNECTOR
(Bi
Check for short to ground in iho SRS main ha.no$:1. Disconnect the SRS main harness 2P connector from theunder-dash fuse/relay box.2. Check resistance between the No. 7 terminal of the SFSmain harness 18P connector and ground. There shouldbe 1.0 MO or more.
ls lha r6i3tlnce as sp.cilied?
YESNO
Short to ground in the und..-d.sh tu3a/r.lay box;roplace the undsr-dlrh tu!6/rahy box.
Short to ground in fho SRS main harness; rsplecc the SRSmain htrnors.
Check lor an open in the SRS main harn€ls:1- Turn tho ignition switch OFF.2. Disconnect the baftery negative cable, then disconnectthe positive cable, and wait for three minutes.3. Disconnect the driver's (and front passenger's) airbagconnector(sl (see page 24-11).4. Disconnect the SBS main harness 18P connector tromthe sRs unit.5. Reconnect the battery positive cable, then reconnect thenegative cable.6. Connect a voltmeter between the No. 7 terminal ol theSFS main harness 18P connector and qro!nd.7. Turn the ignition switch ON (ll), and measure
Poor contact rt the SRS main harness 18P conn.ctor:chock th€ connectoi.. ll th. connector is OK, iubstitute a known-good SRSunit, and recheck.. lf tho pioblem is still pres6nt. replace the SRS mlinhaanos3.
(A) From page 24 39
To page 24.41
24-40

Troubleshooting
DTC 1-1 and DTG 1-2
CAUTION: Whenever the ignition switch is ON 0l), orhas been turned OFF for le33 than three minutes, becareful not to bump the SRS unit; the airbagls) couldaccidentally deploy and cause damage or inluries.
REEL2P CONNECTOR
AZ - SZ5011A
07sAz-TB{0t1At2 0 JACKT-
CABLEREEL2P CONNECTOR
07TAz - SZ5011A
DRIVER'S AIRBAG
SRS MAIN HARNESS
Try to reproduc€ the SRS indicator light:1. Erase the DTC memory lsee page 24,'15).2. Turn the ignition switch ON {ll), and check that the SRS indi-cator light comes on lor about six seconds and goes off.
Does the SRS indicator liqht 3tav on?
Intermittent lailure. system is OK at this time. So€ TloubleIntermittent Failur6 on Deqe 24-15.
Check for en open in th€ driver's airbag inllator:1. Turn the ignition switch OFF.2. Disconnect the battery negative cable, then disconnect thepositive cable, and wait for three minutes.3. Disconnect the driver's airbag 2P connector from the cablereel 2P connector.CAUTION: Do not disconnect the pa9,!eng6.,s ailbag con-nector.4. Connect the special tool {2 0)to the cable reel 2P connec,tor.5. Reconnect the battery positive cable, then reconnect thenegative cable,6. Erase the DTC memory {see page 24 15}.7. Read the DTC {see paqe 24-13).
ls OTC 1-1 or DTC 1-2 indicatod?
Open or incroas€d resistanc€ in the driver's ai.bag inoa-tor; r€place the d ve/s airbag lse6 pege 24€?).
Check for an opgn in the cabl6 reel:1. Disconnect the battery negative cable, then disconnectthe positive cable, and wait for three minutes.2. Disconnect the special tool {2 O) from the cable reel 2pconnector,3. Remove the dashboard lower cover, and disconnect thecable reel 2P connector from the SRS main harness.4. Connect the special tool {2 0} to the SRS main harness2P connector, {cont,
To page 24-43
(2 0 JACK)
24-42
l!

)
1J
From page 24-42
Check for an opgn in the cabl6 reel (cont'd):
5. Reconnect the battery positive cable, then roconnect the
negative cable.6. Erasethe DTC memory (see page 24 15i
7. Read the DTC (see page 24-13).
l. DTC 1-l or DTC 1-2 indicrt.d?
Opan or incraGad rcsbtanca in tha crbla raal; rapllca
Chcck lor .n oDcn in th. SBS mtin harne$i
1. Disconn€ct the battery negative cabl€, then disconnect
the positive cable, and wait tor three minutes
2, Disconnect the lront passgnger's airbag connoctor from
the SRS main harness (with front pssseng€r's airbag).
3. Disconnect the SRS main harn€ss 18P connector from
the SRS unit. Do not disconnect the special tool {2 0)
from the SRS main harness 2P connector.
4. Check resistance betlveon terminals No. 1 and No 13 ot
the SRS main harness 18P connector.
There should be approx. 2.0 - 3.0 O.
Poor contact rt tha SRS main harna*t 18P connactor;
chack tho clnnactot,. It th. conn.ctol b OK. tubttitut. a known-good SRS
unit. end rcchock..lf the problem is still prcsent, replace tho SRS main
harnoss.
Ooen or incr6asad r.si3tlnca in tha SRS mlin hatnaar;
lfr
24-43

Troubleshooting
DTC 1-3
CAUTION: Whenever the ignition switch is ON {lll, orhas been turned OFF lor less than thrEe minutes, becaroful not to bump the SRS unit; the airbag(s) couldaccidenlally deploy and cause damage 01 iniuries.
DRIVER'S AIRBAGASSEMALY
REEL2P CONNECTOR
AZ - SZ5011A
07saz - TB4011A{2 0 JACK)
CABLEREEL2P CONNECTOR
07TAZ - SZ5011A
TrV to reproduce the SRS indicator light:1. Erase the DTC memory (see page 24-15).2. Turn the ignition switch ON (ll), and check that the SRS indicator light comes on for about six seconds and goes off.
Does the SRS indicalor light stav on?
YESNO
Intermittent lailure. system is OK ai this tim€. Se€ Troubl€-shooting Intermittent Failures on page 24-15.
Check tor a short lo another wire in the drivo.'s eirbrg in{la-
1. Turn the ignition switch OFF.2. Disconnect the battery negative cable, then disconnectthe positive cable, and wait for three minutes.3. Disconnect the driver's airbag 2P connector from thecable reel 2P connector,CAUTION: Do not disconnect the passenger's airb.gconnector,4. Connect the special tool (2 0)to the cable reel 2P connector,5. Reconnect the baftery positive cable, then reconnect thenegative cable,6. Erase the DTC memory (see page 24 15).7. Read the DTC (see page 24-13).
ls DTC 1-3 indicated?
NOYES
Shon in the driver's airbag intlator; replace the driv-er's airbag {see page 24-67}.
Check lor a short in the ceble reel:1. Disconnect the battery negative cable, then disconnectthe positive cable, and wait for three minutes.2. Disconnect the special tool (2 O) from the cable reel 2p
3. Remove the dashboard lower cover, and disconnect thecable reel 2P connector from the SRS marn naroess.4. Connect the special tool (2 O) to the SRS main harness2P coonector. {cont,di
fo page24-45
SRS MAIN HARNESS
24-44
07sAz - TBr011At2 0 JACKI

)
Ftom page 24-44
Check for a shon in the cable reel lcont'dl:5, Reconnect the batterv Dositive cable, then reconnect thenegative cable.6. Erase the DTC memory (see page 24-15).7. Read the DTC lsee page 24'13).
Ch€ck tor a shon in the SRS main harness:1. Disconnect the battery negative cable, then disconnectthe positive cable, and wait for three minutes.2. Disconnect the front passenger's airbag connector fromthe SRS main harness (with front passenger's airbag).3. Disconnect the SRS main harness 18P connector trom
the SRS unit. Do not disconnect the special tool (2 0)
from the SRS main harness 2P connector.4. Check resistance between terminals No. 1 and No. 13 ofthe SRS main harness '18P connector.There should be aDorox. 2.0 - 3.0 0.
SRS unit; replace lhe SRS unit lsee ptge 21-
Short in the SRS m.in ha.ness; roplace the SRS mein hal-
Short in the cable reel; replace the cable reel (see
page 21-721.
SRS UNIT
IJ
o1|
24-45

Troubleshooting
!DTC 1-4
CAUTION: Whenever ths ignition 3wiich is ON {lll, or
has boen turned OFF tor loss than three minutes, bs
caroful not to bump the SRS unit; the airbagls) could
accidoDtally deploy and cause damage or iniulies.
07SAZ - TB,()11A(2 0 JACKI
CABLEREEL2P CONNECTOR
07TAZ - Szsol'lA
24-46
DRIVER'S AIRBAG
CABLE REEL2P CONNECTOR
Try to roproduc. the SRS indic.lor lightr1. Erase the DTC memory (see page 24-15).2. Turn the ignition switch ON (ll), and check that the SRS indi-cator light comes on tor about six seconds and goes off.
Ooes th6 SRS indicltor liqht stey on?
YESNO
Intermitid{ failure, 3y3tem b OK at this time. S€e Troublo-shooting Intormittont Failurss on pago 24.15.
Check for a 3hort to powo. in the d.iver's .irbag inflator:1. Turn the ignition switch OFF.2. Disconnect the baftery negative cable, then disconnectthe positive cable, and wait for three minut6s.3. Disconnect the driver's airbag 2P connector from thecable reel 2P connector.CAUTION: Do not disconnoct the parsengcr'r airbagconnactoa.4. Connect the SRS service connector (2 O) to the cable reel2P connector.5. Reconnect the battery positive cable, then reconnect thenegative cable.6. Erasethe DTC memory (see page 24-15).7. Read th6 DTC {seo page 24-13},
ls OTC 1-4 indic.tedT
YESNO
Short to pow.r in the driver'i rirbrg inilrtor; r€pl.cothe driver'! airbag l!e. paga 24-67).
Check for a ahort to Dow€r in tha crblo.eet:1. Disconnect the battery negative cabl€, then disconnectthe positive cable, and wait for three mrnur€s.2. Disconnect the special tool (2 O) trom the cable reel 2Pcononector.3. Bemove the dashboard lower cover, and disconnect thecable reel 2P connector trom th€ SRS main harness.4. Connect the special tool 12 0) to the SRS main harness2P connector. (cont'd)
fo page 24-47
SRS MAIN HABNESS
t2 0 JACK)

)
From page 24-46
Chock for a short to power in the cabls roel lcont'dl:5. Reconnect the battery positive cable, then reconnect thenegative cable.6. Erase the DTC memory lsee page 24-15).7. Read the DTC (see pa1e24-131.
b DTC 1-4 indicat€d?
YESNO
Short to power in tho cable reel; roplac. tho cable reel
lsee Dase 24-721.
Chock for e short to powot in the SRS main hornoas:
1. Disconnect the battery nogative cable, then disconnect
the positive cable, and wait for three minutes.2- Disconnect the front passenger's airbag connector lrom
the SRS main harness (with front passenger's airbag).
3. Remove the special tool (2 0) trom the SRS main harn€ss
2P connector./t. Disconnect the SRS main harness 18P connector from
the sRs unit.5. Reconn6ct the battery positive cable, then reconnect the
negative cable.6. Connect a voltmeter between the No. 1 {+i terminal of
the SRS main harness 18P connector and body ground.
7. Turn the ignilion switch ON lll), and measure voltageThere should be 0.5 V or less.8. Turn the ignition switch OFF.9. Connect a voltmeter between the No. 13 (+) torminal ol
the SRS main harness 18P connector 8nd body ground.
lO.Turn the ignition switch ON (ll), and measure voltage
There should be 0.5 V or less.
Aro voltrges a3 specified?
YESNO
Fauftv SRS unh; roplacc tho SRS unh {soe pago 2+761'
Short to power in the SRS main h.rness; .eplace rhe SRS
main harness.
SRS UNIT
IJ
a0
24-47