C401 HONDA CIVIC 1996 6.G Workshop Manual

\
'99 - 00 models excepi Dl6Y5 engine with M/T:
The scan tool indicates Diagnostic Trouble Code (DTC) P0452: A low voltage problem in the Fuel Tank Pressure
sensor.
The fuel tank pressure sensor converts fuel tank absolute pressure into electrical signals and inputs the ECM/PCM
OUTPUTVOLTAGE(vlt.5
0.5-7 kP.(-g) mmHg,-2 in.Hgl
+7 kP.
150 mmHg,2 in.Hgl
PRESSURE
I
Wire side of lemale terminals
FUEL TANKPRESSURE SENSORSUB.HARNESS6P CONNECTOR (C574 (C568)rl
vcc2(YEL/BLUIsG2{GRN/BLK}
Wire side o{ temale terminals
The MIL has been .eported on.
DTC P0452 is stored
Check the vacuum lines:
Check the vacuum lines of the
fuel tank pressure sensor lor mis-
routing, leakage, breakage and
cloggrng.
Are the vacuum hnes OK?
Problem veritication:1. Do the ECM/PCM Reset Proce-
du re,2. Bemove the fuel fill caP.
3. Turn the ignition switch ON {ll)
4. Monitorthe FTP Sensor voltage
with the Honda PGM Tester' or
measure voltage between body
groLrnd and ECM/PCM connec_
tor terminalA29.
lntermitlent tailure, 3Ystem b OK
at this time. Check for Poor con'
nections or loose wire3 at C131
{located under right side of dash},
C401 {located above under'dash
tuse/relay box), C574 (C568)*
llocdted under access Panel),C792 (tuel rank Prcssure sensorl
and ECM/PCM.
ls there approx.2 5 V?
Check for an open in wire {VCC2
line):1. Turn the ignition switch OFF.
2. Reinstall the ltrel fill caP
3, Remove the access Panel from
the floor.4. Disconnect the fuel tank Pres'sure sensor sub-harness 6P
5. Turn the ignition switch ON (ll).
6. At the access Panel side, mea_
sure voltage between the fuel
tank Pressure sensor sub-nar-
ness 6P connector No 5termi
nal and No. 6 termlnal.
Repair open in tho wire between
th6 fu€l tank Prossuro sen3oa and
the ECM/PCM lc28).ls there approx 5 V?
ECM/PCM CONNECTOR A (32P)
PTANK {LT BLUI
I
ll
(To page '11-278)
(cont'd)

Troubleshooting
Symptom Chart
NOTE:
. Any abnormality must be corrected before continuing the test.. Because of the precise measurements needed. use a multimeter when testinq.. Before performing any troubleshooting procedures check:- Fuses No. 47 l7 -5 Al, No. 56 (20 A) in the under-hood fuse/relay box, and No. 17 (7.5 A) in the under_dash fuse/relavbox- Grounds No. c401, c402, G751- Cleanliness and tightness of alt connectors
SymptomRemedy
Condenser fan does not run at all.Perform the procedures in the flowchart {see page 22-9).
Compressor clutch does not engage.Perform the procedures in the flowchart lsee page 22-12).
Ay'C system does not come on (compressor and fan),Perform the procedures in the flowchan (see page 22-17).
Both heater and A,/C do not work.. '96 - 98 models-Perform the procedures in the flowchart
{see page 21-18).. '99 - 00 models-Perform the procedures in the flowchart(see page 21-35).
22-8

Connector ldentification and Wire Harness Routing
D
How to ldentify Connectors:
ldentification numbers have been assigned to all connectors. The number is preceded by the letter "C" for connectors,"G" for ground terminals or "T" for non-ground terminals.
Location
HarnessEngine CompartmentDashboardOthers {Floor, Door,
Trunk/Hatch, and Rootl
Starter cablesT1, T2 and @
Battery ground cableG1 and O
Engine ground cable AT3
G2
Engine ground cable BT4
Under-hood ABS fuse/relay box wire
harness (With ABS)
t5 ano (9
Engine wire harnessCl01 thru C147
T101 and T102
G101
Engine compartmenl ware harnessC201 thru C215
G201 and G202
Main wire harnessC301 thru C310
C351 thru C361
C401 thru C452
G401 and G402
Dashboard wire harnessC501 thru C520
G501
FIoor wire harnessC551 thru C573
G551 and G552
Rear wire harnessC601 thru C62l
G601 and G602
Driver's door wire harnessC631 thru C640
Passenger's door wire harnessC651 thru C657
Left rear door wire harness (Sedan)C661 thru C664
Right rear door wire harness (Sedan)C671 thru C674
Roof wire harness (Without moonroof)C701 thru C719
Moonroof wire harness {With moon-
roof)
C7l'l thru C719
Heater sub-harness AC721 thru C729
Heater sub-harness BC7 41 thtu C7 44
Ay'C wire harnessC751 thru C754
G751
Hatch wire harness (Hatchback)C761 thru C768
Rear window defogger grgund wirec771
G171
Secondary heated orygen sensor sub-
narness
C781 and C782
Fuel tank pressure sensor sub-harnessC791 thru C793
SRS main harnessC801 thru C807
G801
Rear window defogger wireC831 thru C833

Connector ldentification and Wire Harness Routing
Connector or
Terminal
Number of
CavhiosLocationConnocts ioNotes
c401
c402
c403
c404
c405
c406
c407
c407
c408
c409
c410
c411
c412
c413
c414
c415
c416
c417
c418
c4l9
c420
c42'l
c423
c424
c425
c426
c427
c42A
c429
c430
c431
c432
c433
c434
c435
c431
c438
c439
'14
't4
I
I
10't2
24
16
7
o
18
20
18
7
6
I
o
4
7
8
14
1
Above under-dash fuss/relay box
Under left side ot dash
Under left sid€ of dash
Under left side of dash
Under left side of dash
Und€r left side of dash
Under left side of dash
Under left side of dash
Under left side of dash
Behind under-dash fuse/relay box
Under left side of dash
Under left side of dash
Above under-dash fuse/relay box
Under left side of dash
Under left side of dash
Above under-dash fuse/r€lay box
Under left side of dash
Under left side of dash
Under left side of dash
Behind under-dash fuse/relay box
Eehind under-dash fuse/relay box
Behind under-dash fuse/relay box
Behind under-dash fuse/relay box
Behind under-dash fuse/relay box
Under left side of dash
Under left side of dash
In the steering column cover
In the steering column cover
In the steering column cover
In the steering column covEr
Under left side of dash
Under left side of dash
Under middle of dash
Under middle of dash
Under middle of dash
Under middle of dash
Under left side of dash
Under left side of dash
Eehind under-dash fus€/relay box
Floo. wire harness (C555)
Floor wire harness (C554)
Security system
Cruise control unit
Daytime running lights control unit
Daytime running lights control unit
Roof wire harness (C701)
Moonroof wire harness (C7l1)
Front fog light connector
Integrated control unit
Dashboard wire harness (C504)
Dashboard wire harness (C502)
SRS main harness (C802)
Data link connector
Starter cut relay
lgnition switch
Security system
Clutch switch
Clutch interlock switch
Under-dash fuss/relay box (C9191
Undor-dash fuse/r€lay box {C920)
Under-dash tuse/relay box (C922)
Under-dash luse/relay box (C914)
Under-dash fuse/rBlay box (C915)
Horn relay
Brake swilch
Windshield wiper/washer switch
Rear window wiper/washer switch
Turn signal switch
Combination lighvturn signal switch
Cable reel
lnterlock control unit
Secondary heated oxygen sensor sub-
harn€ss (C781)
Ay'T gear position switch
Shift lock solenoid
Park pin switch and Ay'T gear position
console light
Transmission control module (TCM)
Transmission control module {TCM)
Under-dash fuse/relay box {C925)
ABS
Optional
Canada
Canada
Optional
Atr
MTT
Optional
Mlf
NT
Atf
CVT
CVT
Optional
AN
Atr
G401Left kick panelBody ground, via main wire harness
Main Wir€ Harness (Loft side of da3h and floor branch): '96 - 97 models
*2:Without moonroof*4: With moonroof*5: M/T (with cruise control or for D16Y5 engine)*6: With secondary heated oxygen sensor (H02S)
23-32

Connector ldentification and Wire Harness Routing
Connoctor or
Tgrminal
Number of
CavitiesLocationConneqts toNot€s
c401
c402
c403
c404
c405
c406
c407
c407
c408
c409
c410
c411
c4't2
c413
c414
c415
c416
c417
c418
c419
c420
c421
c422
c423
c424
c425
c426
c427
c428
c429
c430
c431
c432
c433
c434
c435
c437
c438
't4
l4
8,
1
10
12
24
7
6
18
20
18
7
6
8
7
8
14
2
Above under-dash fuse/relay box
Under left side of dash
Under left side of dash
Under left side of dash
Under left side of dash
Under left side of dash
Under left side of dash
Under left side of dash
Under left side of dash
Behind under-dash fuss/relay box
Under left side of dash
Under left side of dash
Above under-dash fuse/relay box
Under left side of dash
Under-dash relay box
Above under-dash fuse/relay box
Under left side of dash
Under left side of dash
Under left side of dash
Eehind under-dash fuse/relay box
Behind under-dash fuse/relay box
Behind under-dash fuse/relay box
Behind under-dash fuse/rslay box
Behind under-dash fuse/relay box
Under-dash relay box
Under left side of dash
In the steering column cover
In the steering column cover
In the steering column cover
In the steering column cover
Under left side of dash
Under left side of dash
Under middle of dash
Under middle of dash
Under middle of dash
Under middle of dash
Under left side of dash
Under left side of dash
Floor wire harness (C555)
Floor wire harness (C554)
Security system
Cruise control unit
Daytime running lights control unit
Daytime running lights control unit
Roof wiro harness (C7011
Moonroof wire harness (C711)
Front fog light connector
Integrated control unit
Dashboard wire harness (C504)
Dashboard wire harness (C502)
SRS main harness (C802)
Data link connector
Starter cut relay
lgnition switch
Security system
Clutch switch
Clutch inlerlock switch
Under-dash fuse/relay box (C919)
Under-dash fuse/relay box (C920)
Under-dash fuse/relay box (C922)
Under-dash fuse/relay box (C914)
Under-dash fuse/relay box (C915)
Horn relay
Brake switch
Windshield wiper/washer switch
Rear window wiper/washer switch
Turn signal switch
Combination light/,turn signal switch
Cable reel
lnterlock control unit
Secondary heated orygen sensor sub-
harness (C781)
Ay'T gear position switch
Shift lock solenoid
Park pin switch and Aff gear position
console light
Transmission control module (TCMI
Transmission control module (TCM)
ABS
Optional
Canada
Canada
Optional
M
MIT
Optionsl
MlT
Alr
NT
NT
CVT
CVT
G401Left kick panelBody ground, via main wire harness
Main Wire Harn€ss {Left side ot dash and floor branchl: '98 model
*2: Without moonroof*4:With moonroof*5: M/T (with cruise control or for D16Y5 engine)*6: With secondary heated oxygen sensor (H02S)
23-34

Connector ldentification and Wire Harness Routing
Connosto! ol
Tsrminal
Number of
CavitiesLocationConnoqtg toNotes
c401
c402
c403
c404
c405
c406
c407
c407
c408
c409
c410
c411
c412
c4'I3
c4't4
c415
c416
c417
c418
c419
c420
c42l
c422
c423
c424
c425
c426
c427
c428
c429
c430
c431
c432
c433
c434
c435
c447
c448
c449
c450
c451
20
4
14
I
6
1
10
12
24
16
4
7
6
2
18
20
18
7
4
8
o
7
8
14
22
18
Above under-dash fuse/relay box
Under left side of dash
Under left side of dash
Under left side of dash
Under left side of dash
Under left side of dash
Under left side of dash
Under left side of dash
Under left side of dash
Behind under-dash fuse/relay box
Under left side of dash
Under left side of dash
Above under-dash fuse/relay box
Under left side of dash
Under-dash relay box
Above under-dash fuse/relay box
Under left side of dash
Under left side of dash
Under left side of dash
Behind under-dash fuse/relay box
Behind under-dash fuse/relay box
Behind under-dash fuse/relay box
Behind under-dash fuse/relay box
Behind under-dash fuse/relay box
Under-dash relay box
Under left side of dash
In the steering column cover
In the steering column cover
In the steering column cover
In the steering column cover
Under lett side of dash
Under left side of dash
Under middle of dash
Under middle of dash
Under middle of dash
Under middle of dash
Under left side of dash
Under left side of dash
Under middle of dash
Under left side of dash
Under left side of dash
Floor wire harness (C555)
Floor wire harness (C554)
Security system
Cruise control unit
Daytime running lights control unit
Daytime running lights control unit
Roof wire harness (C701)
Moonroof wire harness {C711)
Front fog light connector
Intagrated control unit
Dashboard wire harness (C504)
Dashboard wire harness (C502)
SRS main ha.ness (C802)
Data link connector
Starter cut relay
lgnition switch
Security system
Clutch switch
Clutch interlock switch
Under-dash fus€/relay box (C919)
Under-dash fuse/relay box (C920)
Under-dash fuse/relay box (C922)
Under-dash fuse/relay box (C914)
Under-dash fuse/relay box (C915)
Horn relay
Brake switch
Windshield wiper/washer switch
Rear window wiper/Washer switch
Turn signal switch
Combination light/turn signal switch
Cable reel
lnterlock control unit
Secondary heaied oxygen sensor sub-
harness (C781)
A/T gear position switch
Shift lock solenoid
Park pin switch and A,/T g€ar position
console light
Security system
Security system
IVT gear position indicator trim light
Security system
Keyless door lock control unit
ABS
Optional
Canada
Canada
Optional
At-|.
M/T
Optional
M/T
Atr
Optional
Optional
Optional
Atr
AIT
AJ-|.
G401Left kick panelBody ground, via main wire harness
Main Wire Halness lLoft side of dash 8nd lloor branchl: '99 - 00 mod€ls
*2: Without moonroof*4: With moonroof*5: M/T (with cruise control or for Dl6Y5 engine)*6: With secondary heated oxygen sensor (H02S)
23-36

Gonnector ldentification and Wire Harness Routing
Floor Wire Harness lCoupe/Haichbackl
Connsclor or
Terminal
Number of
CavitiesLocationConnects toNotes
c551
c552
c553
c554
c556
c556
c557
c558
c560
c561
c562
c564
c56s
16
8'16
14
20
2
25,)
,I
2
1
14
20
2
2?
1
10
Behind underdash fuse/relay box
Behind under-dash fuse/relay box
Above under-dash fuse/relay box
Under left side of dash
Above under-dash fuse/relay box
Above under-dash fuse/relay box
Driver's door
Driver's door
Passenger's door
Passenger's door
Middle of floor
Left side offloor
Left B-pillar
lnside of left rear wheel
Left c-pillar
Left C-pillar
Left C-pillar
Fueltank
Fueltank
Inside of right rear wheel
Right B-pillar
Fueltank
Left side ot dash
Under-dash fuse/relay box {C923)
Under-dash fuse/relay box (C921)
Dashboard wire harness {C503)
Main wire harness (C402)
Main wire harness (C401)
Main wire harness {C401)
Driver's door wire harness (C631)
Driver's door wire harness (C631)
Passenger's door wire harness (C651)
Passenger's door wire harness (C651)
Parking brake switch
Driver's seat belt switch
Driver's door switch
Left rear ABS wheel sensor
Rear wire harness (C601)
Rear wire harness (C601)
Rear wire harness {C602}
Fuel gauge sending unit
Fuel pump
Right rear ABS wheel sensor
Passenger's door switch
Fuel tank pressure sensor sub-harness(c791)
Power mirror switch
ABS
ABS
ABS
G551
G552
Left kick panel
Left side of floor
Body ground, via floor wire harness
Body ground. via floor wire harness
*1r With power windows*2: Without power windows*3: D16Y8 engine {Coupe)
*4: '96 - 98 models*5: '99 - 00 models
23-40

Gonnector ldentification and Wire Harness Routing
Connector ol
Terminal
Number of
CavitiesLocationConnects toNotes
c553
c554
c556
c557
c557
c558
c559
c560
c561
c562
c563
c564
c565
c566
c567
L5bY
c570
c511
c572
c513
6
14
25
2
25
'|
1
2't4
1'10
6
6
I
1
Behind underdash fuse/relay box
Behind under-dash fuse/relay box
Above under-dash fuse/relay box
Under left side of dash
Above under-dash fuse/relay box
Drlver's door
Driver's door
Passenger's door
Passenger's door
Middle of floor
Left side of floor
Right B-pillar
lnside of left rear wheel
Left C-pillar
Left C-pillar
Fuel tank
Fuel tank
Inside of right rear wheel
Left B-pillar
Left side of steering wheel
Right B-pillar
Left B-pillar
Left quarter panel
Right quarter panel
Under-dash fuse/relay box {C923)
Under-dash fuse/relay box (C921)
Dashboard wire harness (C503)
Main wire harness (C402)
Main wire harness (C401)
Driver's door wire harness (C631)
Driver's door wire harness (C631)
Front passenger's doorwire harness (C651)
Front passenge/s doorwire harness (C651)
Parking brake switch
Driver's seat belt switch
Front passenger's door switch
Left rear ABS wheel sensor
Rear wire harness (C601)
Rear wire harness (C602)
Fuel gauge sending unit
Fuel pump {FP)
Right rear ABS wheel sensor
Driver's door switch
Power mirror switch
Right rear door wire harness (C671)
Left rear door wire harness (C661)
Left rear door switch
Right rear door switch
ABS
ABS
ABS
G552
Left kick panel
Left side of floor
Body ground, via floor wire harness
Body ground, via floor wire harness
Floor Wire Harness lSedanl: '96 model
*l:With power windows*2; Without power windows
23-42

Gonnector ldentification and Wire Harness Routing
Floor Wire Harness (Sedanl: '97 - 00 models
Connector or
Terminal
Number of
CavitiesLocationConnects toNotes
c552
c553
c554
c555
c556
c557
c557
c558
c559
c560
c56'l
c562
c563
c564
c566
c568
c569
c570
c571
c572
16
8
14
20
25
2
2
1
2
1
20
2
2
2
1
l0
1
1
Behind under-dash fuse/relay box
Behind under dash fuse/relay box
Above under-dash fuse/relay box
Under left side of dash
Above under-dash fuse/relay box
Above under-dash fuse/relay box
Driver's door
Driver's door
Passenger's door
Passenger's door
Middle of floor
Left side of floor
Right B-pillar
Inside of left rear wheel
Left C-pillar
Left C-pillar
Left C-pillar
Fuel tank
Fuel tank
Inside of righr rear wheel
Left B-pillar
Fuel tank
Left side of steering wheel
Righr B,pillar
Left B pillar
I ofr ^,,.riar ^.^al
Right quarter panel
Under-dash fuse/relay box (C923)
Under-dash fuse/relay box (C921)
Dashboard wire harness (C503)
Main wire harness (C402)
Main wire harness (C401)
Main wire harness (C401)
Driver's door wire harness (C631)
Driver's door wire harness {C631}
Front passenger's door wire harness (C651)
Front passenger's door wire harness (C651)
Parking brake switch
Driver's seat belt switch
Front passenger's door switch
Left rear ABS wheel sensor
Rear wire harness (C601)
Rear wire harness (C601)
Rear wire harness (C602)
Fuel gauge sending unit
Fuel pump (FP)
Right rear ABS wheel sensor
Driver's door switch
Fuel tank pressure sensor sub-harness(c791)
Power mirror switch
Right rear door wire harness (C671)
Left rear door wire harness (C661)
Left rear door switch
Right rear door switch
ABS
ABS
ABS
G551Left kick panel
Left side of floor
Body ground, via floor wire harness
Body ground, via floor wire harness
"1r With power windows*2: Without power windows
*3:'97 - '98 models*4: '99 - 00 models
23-44

Power Windows
Circuit Diagram ('96-98 Sedan)
UNDER HOOD FUSE/RELAY BOX
I.iASTER SWITCH
UNDER.DASH FUSUBELAYEOX
BLU/ELK
B3
3 I BIGHT BEAR
l$',]ilP3,y
FBONTPASSENGER'SWINDOWswtTcH
BLK
t
G551LEFT HEAF WINDOWMOTOR
23-222
R GNT REAR WINDOWMOTOR
BLK
I
G551FRONT PASSENGER'SWINOOW MOTOR
c401G402