1998 HONDA CIVIC ECU

\7. C604 (Hatchback)
GRN/BLK(Back-up lights)
l\4ale GRNIYELFemale - GRN/RED(Turn signaland hazardwarning lights)
BLK (G601)
- Gray- Left rear ol cargo area- Connects rear wire harness to left outer
taillight assembly
4
5
6
1
2
GRNAVHT(Brake lights)
FED/BLK(Headllght switch)
10. Exhaust Gas Recirculation
(EGR) Valve and Lift Sensor
1
2
3
(D16Y5 MfI D1685)
- Gray- Top right side of engine- On engine wire harness
WHT/BLK (EGR input)
GRN/BLK(Sensor ground)
YEUBLU(Reference voltage)
4
5
6
BLK (Ground)
PNK (EGR control)
of cargo area
rear wire harness to right outer
assembly
n- -n
a t | _ a2a
l3I4t5tttl
IJ
I
8. C605 (Hatchback)
- Gray- Right rear- Connects
taillight
GRN/BLK(Back-up lights)
GRNTYEL(Turn signaland hazardwarning lights)
3
4
5
6
1
2
BLK (G601)
GFNAVHT (Brake lights)
RED/BLK(Headlight switch)
11. Heater Fan Switch
('96-'98 Models)
- Brown
Center of dash- On heater-sub B wire harness
BLK (Ground)
BLUAVHT (L4edium
LO speed input)
BLU/BLK(Hl speed input)
4
5
6
1
2
3
BLU (LO speed input)
BLU/YEL (Medium
Hlspeed input)
GFIN (Blowerswitch ON input)
9. C607 (Hatchback)
- Blue- Right side o{ cargo area- On rear wire harness
BLU/BLK (lndicators)
RED/BLK(License lights)
GBN,ryVHT (8rake lights)
LT GBN(Rear wiper/washe0
5
6
1
2
3
4
GRN(Rear wiper/washer)
LT GRN/BLK(Rear \/iper washer)
)/
202-3
12. Security Starter Cut Relay/C416
- Natural* Upper left kick panel- On main wire harness
1
2Allexcept CX and DXI[,4ale: BLK,^r'r'HTFemale: BLKI/ELCX and DXi BLI(WHT(Battery input)
All except CX and DX:BLK^/ELCX and DX: BLK/WHT(Baftery input)
[.4ale - BLK/WHTFemale - BLKAVHTor BLKRED(Starter output)
All excepi CX and DX:RED/YELCX and DX: GRN(Security starter c!1relay control inpul)
5
6
tl3'

Connector Views (cont'd)
13. Moonroof Close Relay
'96-97 Models:
1 WHT (Battery input)
2 GRN//EL
{Motor conirol)
3 GRN/ORN(lgnition lnput)
- Brown ('96-'97 models) or Gray ('98-'00 models)- Upper left kick panel- On moonroof wire harness
5
6
BLK (Ground)
GBN/RED (Coilconkol)
'98r00 Models:
GRN/YEL(Motor control)
WHT (Battery input)
GRN/RED(Coil control)
4 BLK (G401)
5 GRN/ORN(lgnition input)2
3
15. Moonroof Open Relay
- Brown ('96-'97 models) or Gray ('98-'00 models)- Upper left kick panel- On moonrool wire harness
'96.97 Models:
1 WHT (Battery input)
2 GRN/FED(lvlotor control)
3 GRN/ORN(lgnition input)
'98r00 Modelsi
BLK (Ground)
YEL (Coil conkol)
5
6
GBN/RED(lvlotor control)
WHT (Battery input)
YEL (Coil control)
4 BLK (G401)
5 GRN/ORN(lgnition input)2
3
,1^t
6
14. C415
- Brown- Above underdash fuse/relay box- Connects main wire harness to steering lock pigtail
* 1: [,4ale BLKryELFemale - BLKMHT*2: BLK,/WHT(Start oulput)
l\.4ale - BLU/REDFemale - BLUruVHT(lgnilion key switchoutpur)
N4ale - WHT/BLKFemale - WHT(Battery input)
l\,4ale BLKFemale - BLU^VHT(Ground)
Ani Male - WHTFemale - WHT /EL
(Key interlock switchourpur)
A/T:WHT/BLU(Key interlocksolenold control)
A"rT: WHT/GRN(Battery inpul)
*1= Vehicles pre-wired for accessory security system*2= Vehicles not pre wired for accessory security system
202-4
16. C422
- Green- On tront ol under-dash tuse/relay box- On main wire harness
7
l
2
3
4
5
6
7
FED/BLU (Headlights)
REDAVHT (Headlights)
WHT (Fuse 48)
BED/GRN(Headlight switch)

-39. Cl16
- Gray- Rear ol engine, below intake manifold- Engine wire harness junction connector
41. C433
- Gray- Below center console- Connects main wire harness to A'/T gear position
switch pigtail
i-'-j-----lr-:-_-::::^-_---'18 BLK (G101)
s BLK (G101)
10 BLK (G101)
11 BLK (G101)
12 BLK (G101)
13 USA: BLK (G101)
14 BLK (G101)
L___-----J
2 *1: YEL/BLK*2iYEURED
(PGM-Fr)
3 *1: YEUBLK
(PGl\4-Fr)
4 *l:YEUBLK*2T YEURED(PGr\4-F|)
5 *1i YEL/BLK*2: YEURED(PGM-Fr)
6 *1: YEUBLK*2: YEURED(PGM Fr)
7 *1: YEUBLK*2: YEURED
1 BLK (Cruise conlrol)
2 l\,1ale - LT GRNFemale(Not used)
3 Male - YELFemale - YEURED(Back-up lights)
4 GRN/BLK(Back-up lights)
5 f,rale - GRN/YELFemale - BLU(A,/T controls)
6 l\.4ale - GRN/BLUFemale GRN(A,/T controls)
7 Male - GRN/ORNFemale - YEL(A/T conkols)
9 PNK (Cruise control)
1O BLI(WHT(Starting system)
11 BLI(RED(Starting system)
12 Male - GRNIVHTFemale - BLK/BLU(A,/T controls)
13 Male - GRN/REDFemale - WHT(A,/T controls)
14 Male - GRNFemale - RED(A,/T controls)
L_i9yj'L____i
'1: Allexcept GX'2: GX
Terminals grouped together areconnected by the same bus bar.
40. c401
- Gray- Behind left kick panel- Connects main wire harness to floor wire harness
All '96-'98 Models and '99100 GX Models:
1 *1: BLKWHT (PGM-F|)*2:YEL/BLU (PGl\4'Fl)
2 HatchbackiLT GRN/BLK(Rear wiper/washer).2: BLU/YEL {PGM-Fl)
3 Hatchback: LT GRN(Rear wiper).2: GRN/BLK (PGM'Fl)
4 *1:YEUBLU (PGM Fl)*2: GRN/VEL (PGl,I-Fl)
5 *1: GRN/BLK (PGM-FI)*2: WHT/RED (PGl\4-Fl)
*1= D16Y5iAll '98 modelsD16Y7r '97 California Coupe and Sedan LX, all '98 models
D16Y8: All '96-97 Coupes, '97 Calilornia Sedans, all '98 models
*2= GX models
'99-'00 Models except Gx:
6 BED/BLU(Seat belt reminder)
7 WHT/GRN (Fuse 51)
8 1.: LT GRN (PGM'F|)
I 1.i BLU (PGl\.4-Fl)
10 GRN (lgnition keyremrnoer)
11 LT GRN/RED(Ceiling light)
12 GRN/BLK(Back-up lights)
13 GFN,TVHT (Brake lights)
14 Except GX: YEUGBN
{PGM-Fr)
1 GRN/ORN(Power door locks)
2 BLK,ryVHT (PGM-Fl)
3 Coupe/SedaniGRNA/VHT(Power door locks)Hatchback:LT GRN/BLK (Rear
wiper)
4 Coupe/Sedan: BLU/BLK(Security system)Hatchback:LT GRN (Rear wipeo
5 YEUBLU (PGl\4-Fl)
6 GRN/BLK (PGM,FD
7 RED/BLU(Seat belt reminder)
8 *3: WHT/RED(Power door locks)
9 *3: BLU/RED(Power door locks)
10 '3: BLU^VHT(Power door locks)
11 l\.4ale -
Female - WHT/GRN(Fuse 51)
12 LT GRN (PGM-FD
13 BLU (PGr\4 Fr)
14 GRN(lgnition key reminder)
15 LT GRN/RED(Ceiling light)
16 GRN/BLK(Back-up lights)
17 GRN,ryVHT(Brake lights)
18 YEUGRN (PGI\4.FD
19 *3: YEURED(Power door locks)
20 Canada: BLU/YEL(Power door locks)-
*3= USA HX, LX, EX OX-V Si
202-11

Gonnector Views (conrd)
46. C503
B
9
*1: GBN/ORN(Power door locks)*1r BLU|/EL(Power door locks)
GRN/RED (Brake
system indicator light)*1r LT GRN(Power door locks)*3: GRN/YEL (Lowfuel indicator light)
BLU/BLK (lndicators)*3: BLU/YEL(Stereo sound system)*3: YEUBLK (Gauges)*3: GRY/WHT(Stereo sound system)
10 *1: GRNAVHT(Power door locks)*2: BL(BLU(Power mirfors)
11 *3: BRNMHT(Stereo sound system)
12 *3: RED/YEL(Stereo sound system)
13 GRY/BLK(Stereo sound system)
14 BLU(Stereo sound system)
15 BRN/BLK(Stereo sound system)
16 RED/GBN(Stereo sound system)
- Blue- lvlounted to side of under-dash fuse/relay box- Connects floor wire harness to dashboardwtre narness
1
2
3
5
6
7
*1= '96-'98 models*2: '99-'00 models*3= All except GX models
48. Data Link Connector (DLC)
- Gray- Below left side of dash, above kick panel- On main wire harness
4
6 LT BLU (SRS)
7
8 WHT/BED(Battery input)
9
10
12 BLK (G401)
13 BLK (G401)
14
15 BLU/YEL(DLC inpuVoutput)
47. C551
- Green- On rear of under-dash tuse/relay box- On floor wire harness
1 BED/GRN (Brake
system indicator light)
2
4 BLI(BLU(Rear window defogger)
5 GBN/RED (Brake
system indicator llght)
6 *1: WHT/RED(Trunk light)
7
8 Hatchback: GBN(Rear wiper/washer)
9
10
11 GRN/YEL(Turn signal andhazard warning lights)
13 RED/BLK(Headlight switch)
14
15 GRN/RED(Turn signal andhazard warning lights)
202-14
*1= Allexcept GX models
49. C419
- Green- On rear of under-dash fuse/relay box- On main wire harness
1 '98''00 models: RED(lgnition system)
2 WHT/RED (Fuse s4)
3 Canada: WHT (Fuse 48)
4 BLI(RED(Starting system)
5 WHT (Fuse 48)
6 WHT/RED (Fuse 43)
7 1*: WHT(Security system)
I *2: BLK,TYEL
{Power door locks)
I Canada: YEL/BLK(Headlights)
1O YEURED(Back up lights)
11
13 WHT/GRN (Fuse 51)
14 '96-'98 CVT: BLKWHT(A/T controls)
15 Canada: GRN/RED(Headlights)
16 A/Ti YEL (lnterlock
system)
17 RED/BLK(Headlight switch)
18 Canada: RED/GRN(Headlights)
"1 = USA: LX, EX, HX, DX-V SiCanada: EX, Si12 = '99100 USA: LX, EX, HX, DX-V Si

-57. c723
- Connects heater-sub-A wire harness to
heater-sub-B wire harness
'96-'98 Models:- Gray- Below right side of dash
l BLUAVHT(Blower controls)
2 BLU (Blower controls)
3 YEL (Air delivery)
4 WHT/BLU (A/Ccompressor controls)
5 RED (Dash lights)
6 GRN^VHT (Air delivery)
7 GRN/RED (A r delivery)
I BLUAVHT (Air delivery)
9 BLK,ryEL (Air delivery)
10 YEUBLU (Air delivery)
11 BLU/YEL(Blower controls)
12 BED/BLK (Dash lights)
13 BLK (G402)
t4
15 BLK (Blower conlrols)
16 BLU/BLK(Blower controls)
18 BLU/RED (A/C
compressor controls)
19 GRN/YEL (Air delivery)
20 YEURED (Air delivery)
'99-'00 Models:- Blue- Behind center ot dash
1 RED/BLK (Dash lights)
2 BRNMHT (Au delivery)
4 GRNA/VHT (Air delvery)
5 GBN/BED (Air delivery)
6 GRN/YEL (Alr delivery)
7 YEURED (Air delivery)
8 BLU,ryVHT (Au delivery)
9 YEL (An delivery)
10 YEUBLU (Arr delivery)
11 LT GRN/BLK(Blower controls)
12 ORN,AiVHT(Blower controls)
13 BBN (Air delivery)
14 RED (Dash lights)
15 GRY (Air delrvery)
16 RED,ryVHT (Air delivery)
17 RED/YEL (Air delivery)
18 PNK/BLK (Air delivery)
19
20 BLU/RED (A/C
compressor controls)
21 BLUI/EL(Bear window defogger)
22 WHT/BLU (Fuse 47)
23 BLKryEL (Fuse 17)
24 BLK \G402)
I
1415617I910
1l1213141617181920
58. Security Control UnitiC447lC516
- Green- Above radio ('96-98) or right of steering column
(99-'00)
USA: HX, LX, EX, DX-V Si; Canada: EX, Si:
1 USA: YEUBLU(Set)
2 LT GRN/RED(Door swiich input)
3 BLU/BLK(Trunk switch rnput)
4
5 BLU (valet switch inpu0
6 Canadai GFNAVHT(Lock output)
7 Canada: BLU/YEL(Driver's door lockoulpurJ
I Canada: GRN/OBN(Unlock output)
9
10 WHT (Battery)
11 YEL (lgnition)
12 USA: OHN (Alarm in)
CX and DX:
1
2 LT GRN/BLK(Door open input)
3 BLU/BLK(Trunk/hatch openinput)
5 '96 '98: BLU (Security
ndicator control)99- 00: BLU(Valel switch input)
6
7
B
I
10 WHT (Battery input)
13 BLK (G401)
14 BLUMHT(Security LED conkol)
15 BLU/RED (lgnitionkey switch input)
17 REDAVHI(Light flash control)
18 GRY (Horn conkol)
19 RED/YEL(Starter cut output)
20 Canada: LT GRN(Nol used)
21 ,96-,98 USA: LT BLU(Security output)
22 '96 98 USA: WHT/BLK(Bus data 0)'99-'00 USA: BLU/YEL(Unset)
11 BLK/YEL (lgnition input)
13 BLK (Ground)
14 RED (Security indicatorcontrol)
15 BLU/RED(Key in ignition input)
16
17 BLU or BLU/YEL(Light tlash control)
18 GRY (Horn control)
19 GRN(Slarter cut control)
20
22
1><678910
1112131415rGlxllT1819202122
202-17

Connector Views (cont'd)
60. c411
- Blue- Mounted to top ol under-dash fuse/relay box- Connects main wire harness to dashboard harness
'95198 Models excepl GXI
1 *1: RED/GRN(PGrvr-FD
2 A2: WHT(Security system)
(Security system)
4
5 BLU (SRS)
6 *2r GRY(Cruise control)
7 *2: BLU/RED(Security system)
8 RED/BLU(Cruise control)
9 LT GRN (Cruise control)
10 '96-97 models:BLU/YEL (ABS)
11 YEUGRN (Gauges)
12 RED (Dash andconsole lights)'13 LT GRN/RED(Ceiling light)
*1 = With shitt-up indicator
14 USA LX, EX, and HX:LT GRN/BLK
{Ceiling light)Except USA LX,EX and HX:ftrale - LT GRN/REDFemale - LT GRN/BLK(Ceiling light)
15 WHT/BLK(Hazard warning lights)
16 *2: RED|YEL(Security system)
17 *2: REDA/VHT(Security system)
18 WHT/BLU (Stereo
sound system)
19 BLU (lgnition system)
20 RED/BLU(Seat bett reminder)
21 GRN/OBN (PGN4 FD
22 BLUAVHT (VSS)
23 YEURED (Oil pressure
indicator system)
24 BLU/RED (ABS)
USA: LX: EX, HXCanadar EX, Si
202-20
'98 GX and All '99-'00 Models:
1
2
4 All except GX: BLU/YEL(Rear window defogger)
5 BLU (SRS)
7
B RED/BLU(Cruise control)
9 LT GRN {Cruise control)
10 *1: PNK (lnd cators)GX: BLU/YEL (Bear
window defo9ger)
1l YEL/GBN (Gauges)
12 RED (Dash andconsole lights)
13 *2: Male - LT GRN/REDFemale - Not used(Ceiling light)
14
15 WHT/BLK(Hazard warning lights)
18 WHT/BLU(Stereo sound system)
19 BLU (lgnition systemano gaugesl
20 RED/BLU(Seat bell reminder)
21 GRN/ORN (PG[,4-Fl)
22 BLU,ryVHT O/SS)23 YEURED(Oil pressure indicator)
24 BLU/RED (ABS)
*1 = Allexcept CW and GX*2= All except GX

Gonnector Views (cont'd)
67. Integrated Control Unit
- On underdash fuse/relay box
Connector A
- Connects control unit to under-dash fuse/relay box
1 Not used
4 Erake bulb check output
5 lgnition input
6 lgnition input
7 lgnjtion input
Connectol B
- Natural- On main wire harness
l BLU/BLK
{Front wiper/washer)
2 BLUA/VHT(Front wiper/washe0
3 YEUBLU(Front wiper/washer)
4 '98-'00 models:WHT/BLK(Front wiper/washer)
8 Lights ON input
9 Battery input
11 _
13 Start input
14 Ground
7 RED/BLU (Driver's
seat b€lt switch input)
8 LT GRN/RED(Door open input)
I GRN (Oriver's
door switch input)'t0 BLU/RED (Key inignition input)
202-24
68. Stereo Radio Tuner ('96-'98)
- Center ot dash
Connector A
- Gray- On dashboard wire harness
1 RED/GRN(RF speaker +)
2 BLU (LF speaker +)
3 RED/BLK(lllumination control)
4 WHT/BLU(Battery input)
5 YEURED (lgnition input)
6-
7 BLU/YEL(LR speaker +)
8 RED/TEL(RR speaker +)
9 BRN/BLK(RF speaker -)
1O GRY/BLK(LF speaker -)
12 RED(lllumination control)
14 BLK (Ground)
15 GFY,4/VHT(LR speaker -)
16 BRNAVHT(RR speaker -)
Connector B (USA HX, UX, and EX;
Canada EX and Si)
- Green- On dashboard wire harness
l BLU/RED(Key switch input)
2 LT GRN (Not used)
3 BLU/'EL (Drivels
door unlock output)
4 BLU (Security system)
5 LT BLU
{Security system)
6 BLIVYEL (lgnition input)
7 ORN (Security system)
8 LT GRN/BLK(Door open output)
9 GRN/ORN(Unlock/lock output)
1O GRNAVHT(Unlock/lock output)
1 1 BLU/WHT(Security system)
'2 WHT/BLK(Security system)
13 YEUBLU(Security system)
14 LT GRN/RED(Door open input)
15 BLK (Ground)
16 GRY (Horn conkol)

Connector Views (cont'd)
72. C1s0 (GX Model)
1 YEUBLU (PGM-FI)
2 GRN/BLK (PGM.FD
3 LT GRN (A/t controls)
4 YEURED (PGM-FD
5 GRN/rEL (PG|\,1-FD
- Light green- Left rear of engine compartment- Connects engine wire harness to main wire harness
6
7
BLU/IEL (PGM-FD
Male - PNKFemale - GRN(4,/T convols)
YEL (A,/T controls)
74. Audio Unit ('99-'00 Models)
- Light Blue- Center ol dash- On dashbaord wire harness
2 YEURED (lgnition input)
5 RED/YEL(RF speaker f)
6 BLU/YEL(LR speaker +)
7 RED/GRN(BF speaker +)
I BLU (LF speaker +)
9 RED/BLK(lllumination control)
10 WHT/BLU(Battery input)
']]]-
12*
14
15 BRN,^/VHT
{RR speaker -)
16 GRYAVHT(LR speaker -)
17 BRN/BLK(RF speaker -)
18 GRY/BLK
{LF speaker -)
19 RED(lllumination control)
20 BLK (G501)
73. C575 (GX Model)
BLK (PGM.FD
WHT/RED (PGI\4-FD
GRN/YEL (PGM.FI)
- Gray- Behind left side of rear seat back- Connects floor wire harness to sub luel cord
5
1
2
3
GRN/BLK (PGr\4-Fr)
BLU/YEL (PGI\'-FD
YEUBLU (PGI\,4,FD
202-32
75. Keyless Door Lock Control Unit
(USA Only)
- Gray- At lett kick panel- On main wire harness
l LT GRN/BLK(Door open output)
2 BLU,ryVHT(Lock input)
3 BLU/RED(Key switch input)
4 BLK/YEL(lgnition input)
5 BLU/RED(Unlock/lock control)
6 FED/BLK(Light flash control)
7 WHT/RED(Unlock/lock output)
8 YEURED(Unlock/lock output)
9 GRN/ORN(Unlock input)'10 GRNA/VHT(Lock input)
11 ORN {Securiiy system)
12 LT GRN/RED
{Door open input)
13 YEUBLU(Security system)
14 BLU/YEL(Security system)
15 GRY (Horn control)
17 BLK (G401)
18 WHT/GRN(Battery input)