Page 1800 of 2189
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,
Page 1801 of 2189
,)
IJ
t,
From page 24'62 (A)
Check the cable reel:
1. Turn the ignition switch OFF
2. Disconneit the cable reel 2P connector from the SRS
maln harness,
3. Turn the ignition switch ON {ll}
4. Connect a voltmeter and measure voltage between the
No. 1 terminal of the SRS main harness 18P connector
and ground, and between the No 13 terminal and
ground. There should be approx. 0 - 0.5 V'
Are vohtg6 as specifi"dT -
YESNO
Short to powor in the cabto reel; replace thg cable rool
(see page 24'721.
Short to powet in the SRS main h.rness; replace the SRS
main harness.
24-63
Page 1802 of 2189
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
Page 1803 of 2189
)
FUSE/BELAY BOX
Chcck for an op€n in th6 SRS main harness:
1. Turn the ignition switch OFF.
2. Disconne;t the battery negative cable, then disconnect
the positive cable, and wait for three minutes'
3. Disconnect tho driver's (and front passenger's) airbag
connector (see Page 24'11).
4. Disconnect the SRS main harness 18P connector from
the SRS unit
5. Reconnect the battery positive cable, then reconnect the
neoative cable.
6. Co-nnect a voltmeter betlveen the No 3 terminal ol the
SFS main harness 18P connector and ground'
7. Turn theswitch ON (ll), and m€asure
(cont'd)
(B) from page 24-64
Check tor ahort to ground in the SRS main harn$s:
1. Disconnect the SRS main harness 2P connector from the
under-dash fuse/relaY box.
2. Check resistance between the No. 3 terminal of the SRS
main harness 18P connector and ground There should
be 1.0 M0 or more.
ls the re3istance a3 specified? -
NOYES
Short to giound in tho undot-drlh lut'/rol'y box;
replace the undel-da3h fusgtgEl!9l--------.-
Short to ground in tho SRS m.in harn$s; ropleco the SRS
main harness.
(AlFrom page 24'64
Poor contact at the SRS main harnoss 18P connoctor;
check lho connoctor.. ll the connector k OK, sub3titute r known'good SRS
unh. and recheck. lf the problom is slill present, lepl.ce the SRS main
To page 24-66
SRS MAIN HARNESS18P CONNECTOR
o0
24-65
Page 1804 of 2189
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!
Page 1819 of 2189
How To Use This Manual
Circuit Schematics
oa
Each schematic represents one circult. A
circuit's wires and components are arranged
to show current flow, from power at the top of
the page, to ground, at the bottom.
Shared Circuits
Other circuits may share power or ground
terminals or wiring with the circuit shown. A
wire that connects one circuit to another, for
example, is cut short and has an arrowhead
at the end of it pointing in the direction of
current flow. Nelit to the anowhead is the
name o{ the circuil or comoonent which
shares that wiring. To quickly check shared
wiring, check the operation of a component it
serves. lf that component works, you know
the shared wiring is OK.
Connectors
All in-line and fuse box connectors are
numbered (C725, C416, etc.).
Component connectors are not numbered
but are identiJied by the name of the
component. lf a componenl has more than
one connector, each connector is assigned
a letter (A, B, C, etc.). Below most connector
numbers and comDonent names are
PHOTO and VIEW numbers. The PHOTO
number refers to a Dhoto in the back of the
book that shows lhe conneclor's location on
the car. The VIEW number refers to an
illustration in the back of the book that
shows the connector face, wire colors,
connector cavity numbers, and other details.
The connector cavity numbering sequence
begins at the top left corner oJ the connector
as seen from either of the viewooints shown
on page ffl . Disregard any numbers
molded into the connector housino.
Wires
Wires are identilied by the abbreviated
names of their colors; the second color rs the
color of the stripe. Wires are also identified by
their location in a connector. The number '2"
next to the male and female wire terminals at
C416, for example, means those terminals
join in cavity 2 of connector C416.
Symbols
A complete description of schematic
symbols begins on page | 8
"HOT" label tells you whenthe ignition switch suppliespower to the fuse. \
Artowhead meanswire connects toanother circuit;
Arrow with note rErngother circuils conncct h€re.
it .a
llu":: ^,{ ii t See Power Distribution, .I t----t oaqe tO-3. IL*--:--------J2 Y C723 Junction connectorYEL I Pao'o'8 more bus bars in it;
I - " " to two or more wire
l,/
-t>?
See PowerDistribution,page 10-3.
UNDER.DASHFUSE/RELAYBOX
has one oleach connactgterminala.
it ooints in directionof current flow.
TheImletor
t_I
Cavity number; L ---
Jiili'iJi!--' -----> '
shoin on page S .
Maleterminal
L?*?l?,-
"'"'I
c725
vlEUt/ 75
Connector number;index begins onpage 203.
Number ot photoin back ol bookshowing componentlocation on cat.
Number ofconneclor viewin back of book
7
GBN/FEO
See Ground
Soe Indicators I ASSEMBLY
:-------J
LOW FUELINDICATOFLIGHT r-l
EI
A
"o'r"/PHOTO 52 <-
\
FUELTANKUNIT
Splice ---------) O rr
".* I Page 14'4'
IBroken wire means | --^ -
iar";J.'It,;,rJ;ii; -----i Bffi,Bili*l
elsewhere. I 0a0e tn-a
IBrK Icround --->lL c301: ptioro 21
Page 2028 of 2189
Power Door Locks (cont'd)
Keyless Receiver Unit Input Test
The following tests are pertormed with A (Main) and B (Keyless) disconnected from the audio unit.
TerminalNo.WireColorTest ConditlonTest: Desired RasultPossible Cause it resull is not obtained
4WHT/BLUUnder all conditionsCheck for vollage to ground:
There should bs batteryvoltage.
aBlown No. 47 (7.5A) tuse in the
under-hood fuss/relay box
An open in the wireo
5YEUREDlgnition switch ACC (l)Check lor voltage to ground:
Th€re should be battery
voltage.
aBlown No. 28 (10A) fuse in the
underdash fusg/relay box
An open in the wirea
TerminalNo.WireColorTest CondiiionTest: Desired ResultPossible Cause if rssult i3 not obtalned
BLU/RED
lgnition key insertedinto the ignition key
switch
Check for voltage to ground:
There should bs 1 V or less.aPoor ground (G401, G402)
Faulty ignition key switch
An open in the wire
Short in the wire
a
a
algnition key r€moved
trom the ignition key
switch
Check lor voltage to ground:
There should be 4 V or more.
3BLUI/ELUnder all conditions
Check for continuity betweenthe audio unit 16P connectorNo- 3 terminal and power doorlock control unit 12P connsctorNo. 6 terminal: There should
be continuity.
I An open in the wire
6BLK/YELlgnition switch ON (ll)Check for voltage to ground:
Thers should be batteryvollage.
. Blown No. 14 (7.5A) fuse in the
under-dash fuse/relay box
. An open in the wire
8LT GRN/BLKCeiljng light switch in"middle position"Connect to ground: The ceilinglight should come on.
aBlown No. 43 (7.5A) fuse in the
undsr-hood fuse/relay box
Blown ceiling light bulb
Faulty ceiling light
An open in the wire
a
a
o
14LT GRN/REDEach door oponed,one at a timeCheck for continuity to ground:
There should be continuity.
aFaulty door switch
An open in lhe wirea
tcBLKUnder all conditionsCheck for continuity to ground:
There should b€ continuity.
aPoor ground (G401, G402)
An open in the wirea
16GRYUnder all conditionsConn€ct to ground:
Horn should sound.
. Blown No.52 (15A) fuse in the
under-hood tuse/relay box
. Faulty horn
. Faulty horn relay
. An open in the wire
130-6
Page 2029 of 2189
\
The following tests are performed with A (Main) reconnected to the audio unit.
B
\
TerminalNo.WireColorTest CondilionTest: Desired ResultPossible Cause it result is not obtained
9GRN/ORN
Driver's door lockswitch in UNLOCKCheck tor voltage to ground:There should be l V or less.
o Poor ground (G551)
. Faulty driver's door lock switch
. An open in the wire
. Short in the wire
Driver door lockswitch in LOCKCheck for voltage to ground:
There should be 4 V or more.
10GRN/vvHT
Driver's door lockswitch in UNLOCKCheck for voltage to ground:
There should be 4 V or more.
r Poor ground (G551)
. Faulty driver's door lock switch
o An open in the wire
o Short in the wire
Driver's door lockswitch in LOCKCheck for voltage to ground:
There should be 1 V or less.
\
130-7
![HONDA CIVIC 1999 6.G Workshop Manual \
The following tests are performed with A (Main) reconnected to the audio unit.
B
\
TerminalNo.WireColorTest CondilionTest: Desired ResultPossible Cause it result is not obtained
9GRN/ORN
Drivers do](/manual-img/13/6068/w960_6068-2028.png "HONDA CIVIC 1999 6.G Workshop Manual \
The following tests are performed with A (Main) reconnected to the audio unit.
B
\
TerminalNo.WireColorTest CondilionTest: Desired ResultPossible Cause it result is not obtained
9GRN/ORN
Drivers do")