1998 HONDA CIVIC data link

rl
Troubleshooting
t)
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' I
tion in memory. For easier troubleshooting, this data can be retrieved via a data link circuit l
. When you turn the ignition switch ON (ll), the SRS indicator will come on. ll it goes off after six seconds. the system is
norma l.
. lf there is an abnormality, the system locates and defines the problem, stores this information in memory, and turns
the sRS indicator light on. The data will remain in the memory even when the ignition switch is turned off or if the bat-
tery is disconnected.
o when you connect the scs service connector to the service check connector (2P), and turn the ignition switch oN (ll),
thesRsindicator|ightwi||indicatethediagnostictroub|ecode(DTC)bythenumberofb|inks.
. After reading and recording the DTC. proceed with the troubleshooting for this code'
Precauiions
.Useon|yadigita|mU|timetertocheckthesystem'|fit,snotaHondamu|timeter,makesureitsoutputisl0mA(0.01A)
or|esswhenSwitchedtothesma||estva|ueintheohmmeterrange,AtesterwithahigheroUtpUtcoulddamagethe
airbag circuit or cause accidental airbag deployment and possible injury'
r when-ever the ignition switch is oN (ll). or has been turned oFF for lessthan three minutes, be careful nottobumpthe
SRS unit; the airbags could accidentally deploy and cause damage or injuries
. Before you ,"n1ou" th" SRS main harness, disconnect the driver's airbag connector (and the front passenger's airbag
connector).
. Make sure the battery is sufficiently charged {see section 23}. lf the battery is dead or low, measuring valLles won t be
correct.
. 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 or the special tools'
For backprobing spring-loaded lock type connectors, refer to page 24-9'
Reading the DTC
when the SRS indicator light is on, read the DTC using one of these methods:
A. Connect the Honda PGM Tester to the 16P Data Link Connector {DLC), and follow the tester's prompts lf the tester
indicatesnoDTc,DTcg-1orDTc9-2,doub|e-checkbyjumpingtheservicecheckconnectorandwatchingthesRS
indicator light (see next Page)
HONDA PGM TESTER
DATA LINK CONNECTOR Il6PI
l,
24-13

Ground-to-Components I ndex
f.,lONOTE: All ground wires are BLK unless otherwise noted.
GroundPageComponents or Circuit Grounded
Battery (BLKYEL)
Steering pump bracket
t+-rg ITransmission housing
l
G101
(-1)
G101
(-2)
14-2
and
14-3
ano
14-1
Powertrain or engine control module (PG1 and pG2 are BLK: LG1 and LG2 are
BRN/BLK), EGR control solenoid valve (CW, EGR valve and lift sensor (Dt6yS enginewith M,/T), Engine coolant temperature switch, pGM-Fl main relay, power steeringpressure switch (USA), Primary HO2S (D16Y5 engine with l\/,/T), Vehicle speed sensor,VTEC pressure switch (D16Y5/D16Y8 engines), CKF sensor (BRN/BLK), Transmission
control module (CYf) (Pc1 is BLK: LG1 is BRN/BLK)
Shielding betvveen the PCM or ECM and these components (all have BRN/BLK wires):
CKF sensor, TDC/CKP/CYP sensor. Primary and secondary heated oxygen sensors.
Knock sensor (CWDl6YB engine), Mainshaft speed sensor (AiT except CVT),
I Countershaft speed sensor (A/T except CVf)
Shielding between the TCM and these components (CVT) (all have BRN/BLK wires):
Drive pulley speed sensor, Driven pulley speed sensor, Secondary gear shaft
speed sensor
Powertrain or engine control module (PG1 and pG2 are BLK; LG1 and LGz are
BRN/BLK), EGR control solenoid valve (D16Y5 engine), EGR valve (Dt685), Engine
coolant temperature switch, Fuel pressure regulator shut-off solenoid valve (D1685),
PGM-FI main relay, Power steering pressure switch (USA), Vehicle speed sensor, VTECpressure switch (All except D16Y7 engine), CKF sensor (A

except 81642) (BRN/BLK)
Shielding between the PCM or ECM and these components (all have BRN/BLK wires):
CKF sensor, TDC/CKP/CYP sensor, Primary and secondary heated oxygen sensors,
Knock sensor (All except D16Y7 engine), i/ainshaft speed sensor (Arf except CW),
Countershaft speed sensor (A,/T except CVf), Drive pulley speed sensor (CW), Drivenpulley speed sensor (CVT), Secondary gear shaft speed sensor (CVf)
I Badiator fan motor, Right front parking/turn signat tight, Right headtight
G20214-4I Cruise control actuator, Left front parking/turn signal lights, Left headlight, Rear window
I washer motor, Windshield washer motor, Washer fluid level switch (,99-'00 Canada)
G401| +-o
and
14-7
Accessory power socket, Brake fluid level switch, Clutch interlock switch (M/T), Clutchswitch (lillT with cruise/D16Y5 engine with MfD, Combination wiper switch (Z wires),
Cruise control main switch, Cruise control unit, Dash lights brightness controller, Data
link connector, Daytime running lights control unit (Canada), Gauge assembly, Horn('96-'97 models), Integrated control unit, Interlock control unit (ArI), Keyless door lock
control unit ('99-'00 models with keyless), Moonroof close and open relays, Moonroof
switch, Park pin switch (A/r), Power window relay, Rear window defogger relay, Rear
window defogger switch ('96-'98 models), Steering lock, Stereo radio tuner (,96-,98
USA: LX, EX, and HX), Turn signal/hazard relay, Windshield wiper motor.....plus
everything grounded through G402
6-6

Power Distribution
- From Fuses to Relays and Components (cont'd)
-",JX-
I
I
\FUSE '3n{fEtbRUC|{T7.'.4
FUSE 44FI EA'!aacoa Dr6lc)
FUSE il8POUGNtvtl|Do{taoa
c351
c420PHOTO 63
I-.:CrJ
WIIT/ELX
1
I
I
I
I
FUELINJECTIONRELAYPage 25-1PHOTO 135
DATA LINKCONNECTOR(DLc)
Page 23-4,24-4, ot 25-4PHOfO 5001685 engine -
c419PHOTO 63
UNDER.DASHFUSE/RELAYBOXPHO|Q 5A
POWEBw]tDowNELAYPagE 120H$fa8
L-- ----- --20
wlIT/RED
-t
c420 6PHO|O 63vtEw 53
WHT/FEO
c407PHOTO 52Y|EW 2 ( 9& 00 modsrs)
c5s'rPHO|O 63
L-----JU DEN.DASHFUSE/RELAY BOXPHOfO 58
To Fuses 7, 8, 1 0, and I 1 ;tor deiails, s8€ PowerVYindotts, pa$ 120.
HatchbackCoup€ & S€dan
WHT/FED
(Sedan 1)
(e6-
101
,,, tr:::--*''.:lltut
(Not used)
i--l
tlL--J
TRUNKLIGHTPage 114-3
tl
tl
SPOT.LIGHTSPage 114-3
tl
tl
CEILINGLIGHTPage 114-3
* = Male-Femaleterminalsreversed for'99-'00 models
7A
tl
tl
PGM-FI MAINRELAYPage 23.24, ot 25
vtLw 18
I
I
PGM-FIRELAYPage 2324, ot 22
vtLw 18
i-,-x;-l
icontac{i
tlINTEGNATED
l__i!ffi*
10-10

Ground Distributioh (conrd)
)
- G401
NOTE:
To G402on page14-5.
WINOSHIELOWIPERMOTORPage 91-1
DAYTIMERUNNINGLIGHTS
99.!rRoL cLUrcHuNr I swtTcH:?99^ Pases 23-5and 34-3vtEw 66 PHA|A 55
I
I
INJECTORCONTROLMODULEPage 25-1
I
I
3
. Wires shown without color codes are black.
o On Coupe and Sedan models, G401 is represented by ring terminals.
tl
tl
INTER.LOCK6611p99 PARKUN|T PINpaoe j38 SWITCHor ige_t Page 138PHoro6s of 138-1vtEw 26 PHOfO /7r-1 r-'t
tttl
CLUTCHINTER-LOCKSWITCHPage 21-2
ll
ll
ttl
rll
I
Itttl
'Ll;
I
n
t
M/T with 01685Cruise/D16Y5enginewith M/T
BRAKEFLUIDLEVELswtTcHPage 71ot 71-1
tl
tl
DOOR LOCK .CONTROLSTEERINGLOCKPage /3
tl
tl
UNITPage 130-12 ;
ttl
tt:
models
RNte 40
I
I
(
I
I czor
l'i1l?,
'97 mo
HORNPage 4
I
I
NFnl
s 9c.Plv'
BLK/RED
t
IJ;--
',f-l
DATA LINKCONNECTOR(DLC)Pages 23-4,24-4,25 4,44-1, and 47
30
14-6
G401

PGM-FI (All '9G'98 Models except D16B5; '99100 D16Y5 with MfI)
1@
i-l-,;;*--
L--LT-:
UNDER-HOODFUSE/RELAYBOX
'f 9;u;, '11 ,c,i"',3,wHT'REo I rrEt3' see Powar wHr/cFN I vrF 2/
aaa4 Distdbution, ll wxTcnr See power
wnineo I page 1S10. art Distibution,
r I ,r"ro"" ! Page 10-13
DATA LINK , ICONI€CTOR (DLC) (With Cruise Controt i) |vtEw 48 rrF.t BRAKE SWtTCh
" ""f ":T
-C-l*
ffif{"s1 ** ".,*.-,lf,1i
Fi3:{i'r'rs35:
,""oL.rr. I *-l I
oauwxr
l
ffi;"i;ii" I t------j F=Ln&1?i,inars'.rqr
i
-----=ffi, o"n,n", I H ;,?fl:&'"
,, L----- --------=J ",., u+ lfii?iif.21 F----- - L'gitr! ^o
. 1z I irlot,b asTTELU I cRNu/Hr I v/EW )eIcel ouJl
inpWortsut
(K"UNB 18KSW)Data B.akeswitchinput
wEcvalveconkol
, WEGI orgssure: h,vitch inputinoutrPbPs
Ag
GRN/YEL
wEcPRESSUREswtTcH
POWER STEERINGPRESSURE (PSP)SWITCH
I ALK
Sg€ GroundDistribltion,page 14,
iu,**,"L_jFiF,""*l
*.u_-ig:-l
d'Gr01
23-4
PHO|O 123 IClr|)

PGM-FI (All '9$"q) Models except D16Y5 with M/T and D1685) (cont'd)
@@
i-l;;--
----1-:::=*"---l
!,8,:"ff
| )'rEnsuorr ( tu seo Power I hEiiY
'r9,1%, 'r F,1%,wHr/FEo I v/El/v 34 'HT/FED s€e power w111,6s1 | vtew zz
a 1 oistribution, ll wrlcnr See power
wrr neo I pa$iGio. OF+ DstnbJtron.
t I tn"to"n ! Pa9o 1s13'
oAra LINK z llCONN-ECTOR (DLC) (with cruise controt 4) A
vtEw 48 t?e1 BRAKE SWTTCH
isT-rrT ltf !1.l'".e'.l;'[3J:5:
""[ ":T-:"C-l:.Frd*Fl
lll,
"""f "",T
""U]-t-.,-t-..*.",,""*^i:# [*iu'r;i:;r.';
'""o1""1 ""l
l ;f=:&ri'n"*,,.,0r
[
.---+_s,:.;-,
"*,**il [ff'ftrs,llr,
*,.!. ^* IA2r |' A32 A
: {r(LlN€) €KSW} |I Data Braksfleu.rt} ft svyl IData Braksinpuv switch Ioutput inpd \\' wEC VTEC PSP
I PHaro 123lcvr) D16y5/Dr6y8/ : : PHoro 123lcw)
---'- ei6A2'"noin"i ---- "--- usA
;
L
Dr€ssure vaNesrlitoh input conkol(Vnr) 0rs)
*{
---
"::l
fTlxlE8,u,. I
lc-- ll#il?i,",,*, I
"il
II see crouno
! Fi"frW """,*f,f,',11,r,",.*,
-'l
I
""""iJ,,.lff*u"'"
yi qr;;;i6;;o,E.6A',
: PHOTO 33
sYvltctlinDut
---u-r----
can I
s I crer
"Tl t#ffl","
I-'I-I POWER STEERINGI ' I PRESSURE (PSP)
lc_.ltg+I9i
,
f ff&G{lfd Drsribution,
""L----i
F*i,""," I.----a- -r*ro_*
|"," I vtEw 39
Lr----J
: PHATO 33
\
I
I
pag€ 142.
24-4

PGM-FI (D1685) (cont'd)
(
UNDER-HOODFUSE/RELAYBOX
Se3 PowetDistribution,pags 1&13-
uYt%%,
WHT/REO I vr6wJ,
aaz4wxlnro I
sIDATA LINKcoNNECTOR (DLC)
8 Y C352ll Proro 8,""'o"n I u'* "
ll wwcnr
.4
*"r,o"., ll
IqA
S€E PowsrBistribution,pag€ 10-10.
i
ll
See ABS,
\:(
it31tlofo t'EW 59
c t31
vtEw 5!
F------: (x.irie Pt9q II oata Brakoainpuv switch I
output input \
\
II---J
POWER STEERINGPRESSURE (PSP)swtTcH
See GroundDistribution,pag€ 1+2.
WEC PSPprossure switchswitch inpllt inpui(wU) lPSPSvv)
;ry---
T
flffiii':Y- E"l 2
t--l "* |
t__________L
VIECvafuecontol
-----gl-812I'
GFN,^YEL
i
I
!
I
I
o"n,,,.f, F':t;"
r{r *."
I Jll l!,[.fi"'"l-i-J
l'?!-1 BRAKE SWTTCH
| / | Closed with brake
!-l-ij 9;'3,1ff'**""
'T
"*'-.1,
25-4

UNDER-HOODABS FUSE/RELAY BOX
r------1
c356
FUSE 63MTNCHECK7.54
c357 2
FUSE 61PUIiPolon
c356
ABSPUMPMOTOR
i-.t_____l
*fitr
3
YEURED
A19
(PMR) (MCK) IPump Motor Icomm6n motdr check IRight rear ABS LeftftontABS ;i; !
solenoid control solenoid controt loni of !
\^li Service.check DLC I
/ connector input inpuvoltput i&------ ---_____J
11.I A14 r aBs coNrRor_lrNrBRN I rr eru I LT BLU vttt 63trrt sRS. ATcontrols t-! vccvnv 1"Tl 'Tl ':c360
SERVICE DATA LINKCHECK CONNECTORCONNECTOR (DLC)PHoIo 83 See GrOUnd pHOrO so
Pll'lo.,jpn. p y:l:!:1
*L_T'=Llj:t
See Ground
'--=-Ea; *---==4oi
RightRearABSSolenold(Out)
nightReerABSSoloroid(ln)
LettFrontABSSolenoid(od)
PHA|A 125 PHOfO,/
44-1