1998 HONDA CIVIC D16Y8

Ground Distribution
Circuit ldentification
(To
I 8an6ry ground cable
: Engine ground caue A
Primary HO2S (M/I) IEGR valve (,tffT) | {Ot6y5 engtne)EGB conrol Isllenoid va ve (vT) lwEc flessure switdr (Bl6A2engine)
vss
PSP swtch
Baaery
BLK -* bqiu"trl'ff lso",ilE o;l?f ;".,L ur,u" "ou.,,r,oo, "*'n",
Trlnsmission ho!gng
BLK
BLK
BLK
BRN/BLK
I
I
Vp?oe 23-76, 77)
'96-98 models'99-00 models 816A2, D16Y7 engines
99-00 modors D16Y5, D16Y8 engines
s,-( -i-t;lBL(- pcM Frman reray' E ) tc" 't*' tn''n''*t'''
wEC pressurc sMch(016Y5, D16Y8 engines : 98-00 models)
@
E
Efal
i Engine grcund cable B
: Engrne wire hamess
(cont'd)
23-75
El , M"in ttire hatn"."

rt
'99-00 models:
(5i%ease)E>4 BRNiBLK
i.,.,].',,-
ERNi BtK
BRIVBLK
BFN/BLK
BRN/BLK
BRN]BLK
BRIl/8LK
BFN/BLK
r * s r;l ao^r,qt r
CKF s€nsor 1t -1ll ELU/FEU
Knoq( sonsor (r15J '-l !l r{EUl6LU
P maryHo2s*?H wHT
Mainshafl speeo ssnsor -1ll fiEU
Coutershall sp€ed sensor -+F ] BLU) ..",r.u,.0n
016Y7, Dl6Y5 (CW) ongines
;;=-"r,i,-l
Ly"::::::::
I Secondary Ho2s :{ WHT/RED-;'4:v-..1
RED/BLU - I
wHT - f rau,rru (an )
pgTpse- J
*1i016Y5, Dl6Y8engines *4:016Y7, Bl6AzerEines lcont'd)*2: Excepl DI6YSengino ([VT) *5: D16Y5, D16Y7, D16Y8Bngines* 3:Dl6Y5 sngine ([VT) *6:B16M, D16Y8,016Y5 (CW)engines
015Y5 (LVT) sngine
41-.1
Dfiv6 prirEy speeo sonsot -1l l hEL,bLU
Driven gr ley sp€ed sensor -- F I WHT
Secondary gea sian sp€ed sensor .-ll WHT/RED
E : Engine w re harness E : Rear h€al6d orygen sensor sLlb harness
IIJ : Main wire harnsss ------ shielding
816A2, Dl6Ygengiftes
23-77

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

'1 = '96 D16Y8 engine: All coupes'97 D16Y7 engine: California Coupe, California Sedan LX'97 D16YB engine: All coupes, California Sedan'98100 models: All except D1685-.t UNDER-DASHI
I
\
'--1 $NEGRATED
| !s$il:'Ptlofo avtEw 67
c42'lPHO|O 63vlEW 50
ct01
vtEw28
FUSE/RELAYBOX
\
I
T
D16Y8
13
c568
ELKAYTIT
BLKAVHT
1
143
EVAP BYPASS : :SOLENOIDVALVE . ,Page 23-9,23-11,23-14,24-7,' '
24-9, ot 24-11
H02SPage 23-11ot 24-11pHoTolo4 ; ; PHoTo 43(See S/lV page 11-9lor'99-'00 models) ,
i1[
":"[-lT:T
l+Tli'::f;:r i"'{' l;;;]fip;:
I Fs'[
**,
I il i I ii !-l s];$:i i Ii t--l
i ! i'*[ iEi.;*Ti lii
'fl*-i
i li itqii-*
i l il[l?ti
lii iiii;:" i:li
i trr i I i.r^.:.'.'.'i::::;j i !' i
: i i , I i ,+e;::"," i : ! i
itI
i! | i | :".*lfigi3li;ts's"";:tg;u'u^.i : ! :
iv7"-- : rA : *'I i i osl :
; CoNTBOL , r--1
i liiit- i i_j i i_j #s,{;'i' i [__j
ffnih'*'
i 23:11,23-t4, , EVAP PURGE I pRtMARy Ho2s : ' powERTRAtN :| 24-7,24-9, ' CONTFOL ; Page 23-8, 23'10, 23'13, , ; CONTROL ,' ot 24-11 ' SOLENOIO , 24-7 .24-8. 24-10. ot 25-8 ' , MOOULE (PCM) ,' pHoTo 3s : VALVE I PHoro 40 ' ' Paqe 39-8 '
| (see s/M : Pase23-s,23'11, : ii3l311l l3;ll Pl?191,.,"^,, : ' orSe-12 :
' PHoTo 39 I vALvE | ' Paqe 39-6
: (See S/M : Page 23-9, 23'11. ' lHqI94?199 99 0.16Y!i - i ' or 5g-tz :i bi-gllt-g i zs:tq, zc-i, zc-g', ' PHoro 733 ree 00 D16Y8/816A2) i '. in6i "i i
:':1T:9' ',91"?i'l; i------ ------j ".-':-*-'1. -----j(cont'd)- - - -::-:-l - - - - t PHO\O 37 to16Y7l
1(}5

----" A/T -----t
DRIVEN PULLEY , ^.,.
;iftTBilis'".f l5Ftr,.""_
co'rinienixnn '. Pase 23'2
SPEED SENSOR ; .'-\.SHIELD 'F--.1
TDC/CKP/CYPSENSORSHIELDPage 20
ll
r_:.-i
23-13
t1
23- l4
tl
PRIMARY SECONDARYHO2S HO2SSHIELD SHIELDPages 23-8, Pages 23-9,23-10. and 23-11. and
--- CW ----.
TRANSMISSION ;CONTROLMODULE(TCM) ,Page 39-5 :PHO|O 121vlEw 69r____1 ,
tt:
tt:L----J,
. D16Y8engine
SECONDARY .
HO2S :SHIELD ;Page 23-11
l. - -..1 ;
tt:(D16Y/i D15Y8)Page 39-1
l.--.1
1l
r:--iBFN/BLKARN/BLK
A4
6FN/BLK' EFN/BI
i i srco"oo"t :' I GEAR SHAFT
I I Or MAtN!'tAt I. II SPEED SENSOR '
CW. - D16Y8 -, engine: N SENSoR SHTELD ,
i !i?il3li*u,, i
CWSHIELD :Page39-4,
CRANK-SHAFTSPEEDFLUCTU-ATION(cKF)SENSORPage 23-2
tl
ll
;I;..
26
i xNocx' SENSOR, (KS)' SHIELD
, Fage zJ-5
: F--.1
:ll
iilr-:i
----:.--------:
c442(Terminals 18-20)
c10.1 PHofo 125\HOTO 21 VIEW 54vtEw 29
'----- cw ----'
DRIVE
BFN/BLK
PULLEY :SPEEDSENSORSHIELDPage 39-4 :
1.---{ :I t;
cl30Oermlnal8'l-10)
vtEw 52
14-',

PRIMARYH02SSHIELDPage 24-7 ,24-8, ol24 10
tl
r_i
.--- D1685engine --.
' TNJECTOR I: CoNTROL ;; MoDULE ,, Page 25-1 ,t PHO\O 1aa :I vtEw 77
i r-- --r I,ll:
ill;
816l€I.--- D16Y8I englnes i. SECONDARYI Ho2s SHTELD :, Pages 23-11 I' and 24-11
I z-r; l.--.1 :
c131
(c101 D16Bs)
. ORIVE PULLEY
: SPEED sENsoR I. SHIELD ,' Page 39-12
l---:
: 1.--,1 ;
:l | :
c102
CKFSENSORSHIELDPage 24 2
tl
\..
BFN/BLK
------_I
SECONDARYGEAR SHAFT :SENSOR SHIELD ;(D16Y5)P.^a 'lO,1 ,oifu-alisirrrSPEED SENSOR :SHIELD :(016Y7/D16Y8)Page 39-9
F--.1
tl
rJii
t
rDc/cKP/CYPSENSORSHIELDPage 2O-2
tl
\,.
T
""","a* |
i
___r_
14-3

lgnition System
- All Dl685 engines; All '99-'00 Models except Dl6Y5 with M/T
NOTE: For Service Check Connector details, see page 24-4 (except D1685) or 25-4 (D1685).
STEERINGLOCKPOWERTRAIN
lm- sii.- s*- iffffiEgr
I '8f", '3#n '3#n | (Pcn' or EcM)
L------ -----J Wro 86
',L_I__J,
!l---+--l !
'i---
j----i'
fl '","?siii,xl
I I I
i*n"'."
-"1 "-l '-l *"-^lr";J
I I I ='i.{i31i",,-
All except D1685D1685
gLK.Yer t
u l9f#'
fi
"*1,[
F,*';.,
!'T-f*-'i"i! {F+ Distdbution,
LJ_gg'n'_
i.x,r
9'x*"
-.t
iF--Hs-,mT-l
ll pase lGi. I
l( FUsEe I
!Lig::___J
.I UNDER-I DASH
a FUSE/
! RELAY- BOX
1 Y C419 UNDER-^,ol',lill,l?"u' rlir?IA) RELAYBOX
.t0
BLKI/EL
10(D16Y7/D16Y8 s)
c101
PHO|O 142 lA1685)vlEw 2a
c120
vtEw 29OFN/ALULT BLU orALU/GRN
BLU,^VEL
c120
vtEw 29
ELKWHT/BLU
7
FED
c21c9
ALK
c30
;;--;;---o;;;lSensor Sonsor Sensor I
POWERTRAINor ENGINECONTROLMODULE(PCM or ECM)
ground ground gtound
L ------ -----J PHoro 36
Sec!l|dary
Sparh Plugs
20-2

NOT-E: Fu^se.31 is HO-f-with lgnition Switch in START (tD and clutch pedat depressed orA"iT Gear Selector in PARK (P) or NEUTRAL (N), see Siarting Systeni, page 2i or 21-2.
See Int€oratedControl Jnit.page 70.
UNDER-OASHFUSE/RELAYBOXPHOTO 58
c420
vtEw 53
PGM-FIMAINRELAY
vtEW 18
|- flrn*',
""-"'l
""^"*l *L
I
016Y5/D16Y8 D16,
;-ensnewrh",r-t :--*f 3l3yi:131ffi,-'' ---
I H;[h- N
i ii jt
lilT:{xsl I
ffifi:iil:"'"" il
-UTtl
i ryffi$il: i i ffifrffi ,,1 _,_:_____r,"*,
,A124 , , A14A, A13A ' 416A C6APOWERTRAIN, , ,^lAcy) (iAcvP) (rAcv N) | crnt $rs): I rAurr'arve , i r--.-, : Fuel pump control Start input ! :rNGtNFi , nt;*Y:l"" , i r--r I Fuel pump conkol Stan input | ;'NG|NElr 'uv"nv' : , IAC valve controt ' ICONTROL\I , I MODULE
t'----- ':------------i l(PcMorEcM)
I t';[?,i?"*L------ ---J
(cont'd)
---l-lf -----=-------------=--:
i
"au*", IzI
23-1