troubleshoot HONDA CIVIC 1998 6.G Workshop Manual

Troubleshooting
DTC 2-1 and DTC 2-2 - With Front Passenger's Airbag
CAUTION: Whenever the ignition switch is ON (ll), or
has been turned OFF for less than thr€e minutes, be
careful not to bump th€ SRS unit; the airbags could
accid€ntally deploy and cause damage 01 iniuries.
Try 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 indi-cator light comes on for about six seconds and goes off.
Does the SRS indicator liqht stay on?
NOYES
Int€rmitl€nl failure, sFtem is OK at thb time. Soe Trouble-shooting Intermittent Failures on page 24-15.
Check tor an open in the pmi€nger's airbag inflator:1. Turn the ignition switch OFF.2. Disconnect the battery negative cable, then discohnectthe positive cable, and wait tor three manutes-3, Disconnect the front passenger's airbag connector lromthe SRS main harness {see page 24.1 ...4. Connect the special tool (2 0) to the SRS main harness2P connector,CAUTION: Do not disconnect the driver's airbag connec-tot,5. Reconnect the battery positive cable, then reconnect thenegative cable.6. Erase the DTC memory (see page 24-'!5).7. Read the DTC (see page 24-13).
ls DTC 2-l or DTC 2-2 indicated?
NOYES
Opon or increased rosistance in the pa$enger's airbaginflator; replace tho pass€nqor's airbaq lsee paEJe2a$71.
Io page 24-51
FRONT PASSENGER'SAIRBAG 2P CONNECTOB
- sz50r1A
07sAz - TB4011A{2 0 JACK}
24-50
MAIN HARNESS
I
o1

Troubleshooting
DTC 2-3 - With Front Passenger's Airbag
CAUTIONT Whanever ihe ignhion switch is ON lll), or
has been turnod OFF lor le33 than threo minutes. be
careful not to bump lhe SRS unit; ths airbags could
accidontally deploy lnd cause damage or inluries.
FRONT PASSENGER'SAIRBAG 2P CONNECTOR
- szsor la
{2 0 JACK)
Try to reproduce tho SRS indicator light:1. Erase the DTC memory (see page 24 15).2. Turn the ignition switch ON 1ll), and check that the SRS indi,cator light comes on for about six seconds and goes off.
Doe3 the SnS indicator light 3t.y on?
NOYES
Intermittort tailura, 3y3tem b OK at this time. S€e Trouble-shooting Intormittent Failuros on page 24-15.
Check tor a 3hort io another wire or dec.oasod relirtanct inth6 passonger's airbag inflato.:1. Turn the ignition switch OFF.2. Disconnect the battery negative cable, then disconnectthe Dositive cable, and wait for three minutes.3. Disconnect the tront passenger's airbag 2P connectorfrom the SFS main harness (see page 24-11).4. Connect the special tool (2 O) to the SRS main harness2P connector.CAUTION: Do not disconn€ct th6 driver's airbag connec-tor.5. Reconnect the baftery positive cable, then .econnect thonegative cable.6. Erase the DTC memory {see page 24-15).7. Read the DTC (see page 24 13).
l. DTC 2.3 indicated?
YESNO
Short io another wiao or d€creased rcsi3tanc6 in the prs-3enger's airbag intlator; repl.ce the passong.r's .irbaglsee page 2467).
To page 24-53
24-52

Troubleshooting
JDTC 2-4 - With Front Passenger's Airbag
CAUTION: Whenever the ignition switch is ON lll), or
has been turnod OFF for less than throa minutes, be
car.Iul not to bump the SRS unit; the airbags could
accidentally deploy and cause damage or iniuries.
Try to r€producethe SRS indicalor 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 Ior about six seconds and goes off.
Does the SRS indicator light stay on?
YESNO
lDtermittenl failure, syltom b OK at this tima. S€e Trouble.shooting Int€rmittent Failuros on page 24-15.
Check lor a short to pow6r in the passenger's airbag intla-tor:1. Turn the ignition switch OFF.2. Disconnect the battery negative cable, then disconnectthe positive cable, and wait for three minutes.3. Disconnect the front passenger's airbag 2P connectorfrom the SRS main harness lsee page 2/t 11).4. Connect the special tool (2 O) to the SRS main harness2P connector.CAUTION: Do not disconnect the driver's airbag connec-tor.5, Reconnect the battery posit;ve cable, then reconnect thenegative cable.6. Erase the DTC memory (see page 24-15).7. Bead the DTC (see page 24-13).
ls OTC 2-4 indicatod?
YESNO
Short to power in the passenger's airbag inflator; replacetho passenger's airbag lsee page 24-67)
To page 24 55
AZ - SZ5011A
07sAz - TB4011A12 0 JACKI
L
MAIN HARNESS
24-54

Troubleshooting
DTC 2-5 - With Front Passenger's Airbag
CAUTION: Whenever the ignition switch is ON 0l). orhas b€6n turned OFF tor loss than three minutes. becareful not to bump tho SRS unit; th€ airbags couldaccidentally deploy and cause damage or injuriss.
FRONT PASSENGER'SAIRBAG 2P CONNECTOR
tl
AZ - SZ50114
07sM - TB4011A{2 0 JACK)
24-56
I
MAIN HARNESS
T.y lo reproduce the SRS indicator light:1. Erase the DTC memory (see page 24,15).2. Turn the ignition switch ON l), and check thatthe SRS indi-cator light comes on for about six seconds and ooes off.
Intermiftem f.ilure, ty3tom ir OK at this timo. See Trouble-Iniermittent Failuro3 on paqe 24-15.
7. Read the DTC {see page 24-13).
Check to. a short to g.ound in the passenger,s ai.bag inflator:1. Turn the ignition switch OFF.2. Disconnect the battery negative cable, then disconnectthe poshive cable, and wail for three minutes.3. Disconnect the fronl passenger,s airbag 2p conneclorlrom the SRS main harness {see page 24 l t ).4. Connecl the special tool (2 0) to the SRS main harness2P connector,CAUTION: Do not disconnect the drivor,s airbag connec_tor.5. Reconnect the battery positive cable, then reconnect thenegative cable.6. Erase the DTC memory (see page 24 15).
Short to ground in the p8,s€nger,s ai.bag infleto.; replaoerhe passenger's airbag ls€o page24{7).
To page 24-57
o!

Troubleshooting
DTC 2-1 and DTC 2-2 - Wathout Front Passenger's Airbag
CAUTION: Whenever the ignition switch is ON {lll. or
has been turned OFF tor less than three minutes, be
caretul not to bump the SRS unit; the aidag could acci-dentally deploy and causs damage or iniuries.
Try to reproduc€ the SRS indicator light:1. Erase the DTC memory {see page 24-15r.2. Turn the ignition switch ON (ll), and check thatthe SRS indicator light comes on lor about six seconds and ooes off.SRS UNIT
Intermittent failu.e, system is OK at this time. Se€ Trouble-Intermifient Failuies on paqe 24-15.
OUMMY RESISTOR
Check for an open oa increased resistance in the dummvteslstot:1. Turn the ignition switch OFF.2. Remove the dummy resistor from the SRS main harness2P connector,3. Check the resistance between the A and B terminals ofthe dummy resistor. There should be 1.5 - 2.5 0.
resistoa.
Check lor an open or incre.sed resisiance in the SRS mainharness:'1. Disconnect the battery negative cable, then disconnectthe positive cable, and wait for three minutes.2. Disconnect the driver's airbag 2P connector from thecable reel2P connector lsee page 24 t t).3. Disconnect the SRS main harness t8p connector fromthe SBS unit.4. Connect the dummy resistor to the SRS main harness 2pconnector.5. Check resistance between the No- 1O terminal and No. 14terminal of the SRS main harness 18p connector. Thereshould be aDorox. 1.5 - 2.5 0.
SRS MAIN HARNESS18P CONNECTOR
ls the resistance es speciti€d?
YES
Poor contact ar the SRS main hahess 18p connector;check the connector.. lf the connector is OK. substitute a known-good SRSunit, and recheck.. lf the problem is still present. repbce the SRS mainnarness.
24-5A
\
Ooes the SRS indicalor light stay on?
Open or increased resi3tanc6 in tho SRS main harness;OU
I

Troubleshooting
DTC 2-4 - Without Front Passenger's Airbag
CAUTION: Whenever the ignition switch is ON 0l). orhas been turned OFF for lsss lhan three minutes. becaretul not bump the SRS unit; the airbag could acci-dentally doploy and causo damage or iniuries.
Try to r€produc€ tho SRS indic.to. light:1. 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 for about six seconds and go€s off.
Do€rthe SRS indicrtor light stay on?
NOrEs
lntormitteit t ilur., iyst m b OK at thb tim6. Sle Troubleshooling Intdmitt.nt Frilu.os on pag6 2+lS.
Check for a short to power in the SRS main h.rna3s:1. Disconnect the baftery negative cable, then disconnectthe positive cable, and wait for three minutes.2. Dlsconnect the driver's airbag 2p connector from thecable reel 2P connector (see page 24,11).3. Dlsconnect the SRS main harness l8p connector tromthe SRS unit.4. Beconnect the battory positiv€ cable, then reconnect thenegative cable.5. Connect a voltmeter between the No. lO (+) terminal ofthe SFS main hsrness 18P connector and qround.6. Turn the ignition switch ON {ll), and me-asure voltage.There should be 0.5 V or less.7. Connect a voltmeter between the No. 14 (+) terminal ofthe SRS main harness 18P connoctor and ground, andmeasure voltage. There should be 0.5 V or less.
A.e voltage. .3 spocifi.d?
YES NO
F.ulty SRS uniC .epla"" tl,. SnS unn l""" p"g" 2+7O:_l
Short to pow.r in tha SRS mlin harnc$ or tho dummyr*istor; chock lor contact bctwcen th. dummy r6ai3to. rndrnother wiro. lf there is no contrct, rcphcc the SRS msinhame3s.
SBS UNIT
SRS MAIN18P CONNECTOR
24-60
I

Troubleshooting
DTC 8-6
CAUTION: Whonover the ignition switch is ON lll), or
has been turned OFF for less than thro€ minutes, be
careful not to bump th6 SRS unit; the airbags couldaccidentally deploy and cause damage or iniuries.
Besides indicating an abnormality in the SRS unit, DTC
8-6 may also indicate that two problems equivalent to
DTC 1-l and 2-4, 1-4 and 2-1, ot 1-4 and 2-4 occurred at
the same time. Proceed in the order shown below.
SRS MAIN HARNESS18P CONNECTOR
\
24-62
Check th. SRS main harn6$:1. Disconnect the battery negative cable, then disconnectthe positive cable, and wait for three minutes.2. Disconnect the driver's airbag (and front passenger,sairbag) connector(s) {see page 21-111.3. Disconnect the SRS main harness 18P connector fromrhe sRS unit.4. Reconnect the battery positive cable, then reconnect thenegative cable.5. Turn the ignition switch ON (ll).6, Connect a voltmeter and measure voltage botween theNo. 10 terminal of the SRS main harness 1BP connectorand ground, and betlveen the No. l{ terminal and qround.Th6re should be aoDrox. 0 - 0.5 V.
Aro voltages as spacified?
NOYES
Sho.t to power in tho SRS mrin hamoss; rsplace th6 SRSmain haanac3.
Chacl the SRS main hrrne*s and the cabl. reel:Connect a voltmeter and measure voltage between theNo. 1 terminal of the SRS main harness 18p connectorand ground, and between the No. 13 terminal andground. There should be approx. 0 - 0.5 V.
Are voltages o3 specilied?
YES
SRS unit; replace the SRS unit lse6 page 2+76).
NO
To page 24-63 (A)
o1,

Troubleshooting
DTC 9-2
CAUTION: Whenever the ignition switch is ON 0l), ofhas been turned OFF lor lass than three minutes, becareful not to bump the SRS unit; the airbag(s) couldaccidentally deploy lnd caqse damage or iniuries.
Check the tu.c:1. Turn the ignition switch OFF.2. Check for blown No. 23 (10 A) fuse in the under,dashfuse/relay box.
Replace the tuse. Turn the ignition switch ON lll) , and checkthat the fuse doesn't blow.
Th6 problem hs3 disappe.rod, TGt-dJiv€ the vehiclo and3ee Troublerhooting Intermiftcnt Failuro3 on paqo 2l-15.
Check tol short to ground betwe.n tho unde.-da3h fus./r.ley box and the SRS unit.1. Turn the ignition switch OFF.2. Disconnect the baftery negative cable, then disconnectthe positive cable, and waittorthree minutes.3. Disconnect the driver's (and front passenger,s) airbagconnector(s) (see page 24-11).4. Disconnect the SRS main harness 1gp connector fromthe sRs unit.5. Check resistance between the No. 3 terminal of the SRSmarn harness 18P connector and ground,There should be 1 MO or more.
Feufty SRS unh; rcphce the SRS unit lsee pag.2+761.
(A)To page 24-65
To page 24-65
No. 23 lr0 Al FUSEFUSE/RELAY BOX
!
SRS MAIN HARNESS18P CONNECTORSRS UN'T
24-64
I
SRS MAIN HARNESS 18P CONNECTOR
Otf

Troubleshooting
DTC 9-2 (cont'dl
2- Disconnect the SRS rnain harness 2p connector lrom theunder-dash fuse/relay box.3- Check resistance between the No. 2 terminal of the SRSmain harness 2P connecior and No. 3 terminal of theSFS main harness 18P connector_
Poor contact at the SRS main ha.ness 2p connector;check the connecto... lf the connector is Ol(, sub3titute a known-good under-dash tuse/r€lay box, and recheck.'lt tho problem is still present, replece the SRS main
Open in the SBS main harness; replace the SRS main har_ness,
SRS MAIN HARNESS2P CONNECTOR
24-66
I
\
From page 24-65
Chock tor an open in th€ SRS main hern€ss:1. Turn the ignition switch OFF.
There should be 0 0.5 0
SRS MAIN
SRS MAIN HARNESS18P CONNECTOR
o!

How To Use This Manual
The next few pages describe how this manual is organized. They also
explain what kind of information the manual contains, what that
informalion means, and how to use it to troubleshoot electrical problems.
Circuit schematics break the entire electrical system into individual
systems, like the Low Fuel lndicator Light on the nelit page.
Only electrical components that work together are shown together,
so you won't be distracted by unrelated wires.
Explanations of the abbreviations and svmbols used in the schematics
begin on page [Fl. You'll need to know what they mean before you can use
a schematic effectively.