1997 HONDA CIVIC circuit schematic

Connector Views
To see the configuration of a connector's cavities, look up its view number in the Connector
View section in the back of the book. Each view includes the color of the connector, where it
is located, and what it connects to.
Use the Connector Views to help locate the proper cavity when you need to probe a
connector. lt can be especially helpful if the connector has more than one wire of the same
cotor.
Connector views can also be used to help diagnose multiple symptoms in separate circuits
which could be caused by a single problem in a connector shared by those circuits. Here's
how:
1. Pick one of the multiple symptoms and look up the schematic for that circuit.
2. Make a list of all the in-line and fuse box connectors in that schematic (include page
numbers).
3. Then, in the Connector View section, look up each connector on your list to see il circuits
related to the other symptoms run through one of them. lf they do, inspect that connector
for the oroblem.
Example: The blower, rear window defogger, and the windshield wiper don't work. List all
in-line and fuse box connectors in the blower controls circuit and then check the Connector
View section (sample below). You find that C324 is common to the rear window defogger
circuit and wiper/washer circuit, so you inspect C324 and find the problem, bent terminals.
5.
6.
7.
1.
2.
WHT (Blower controls)
YEUBLU (Rear window
defogger)
BLK,ryVHT (Starting)
BLU/YEL(Wiper/washe0
8LU (Wiper/washed
BLfiEL (lgnition)
WHT/BLU (ABS)
Connector Views (cont'd)
21. C324
Brown
Behind left kick panel- Connects left engine compartry'ent wire harness to
main wire harness
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567

How To Use This Manual
Symbols
oo
Wire Color Abbreviations
The following abbreviations are used to
identify wire colors in the circuit schematics:
BLK.... .........b|ack
BLU.... ......... blue
BRN.... ,....... brown
GRN.... ........ green
GRY.... ......,.. gray
LTBLU . .....lightbtue
LTGRN. ....lightgreen
ORN.... ....... orange
PNK .... .......,.. pink
PUR .... ........ purple
RED .... .......... red
WHT... .........white
YEL .... ........ yellow
A broken line means this part of the circuit
is not shown; refer to the circuit listed for
the complete schematic.
"ral
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-.1
See GroundDistribution,page 141.
I G101
Where separate wires
join, only the splice is
shown; for details on
the additional wiring,
refer to the circuits
listed.ili::i
{[
UNDER-OASHFUSE/RELAYBOX
Wires
A wavy line at the end of
a wire means lhe wire is
broken by the binding of
the book or by a "choice"
bracket but continues on
the next page.
Wire insulation can be
one color, or one color
with another color stripe.
(The second color is
the stripe.)
This circuit continues on
another page. (The arrow
shows direction o{ current
flow.) To tollow the RED/
BLK wire in this example,
you would turn to page 23-5
and look for the "2" anow.
This means the branch of the
wire connects to another
circuit. The arrow Doints to the
name of the circuit branch
where the wire continues.
8LK-Cruise Control, €aaaGauges, Indrcalors
!YEUsLK
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Wire choices for options or
different models are labeled
and shown with a "choice"
bracket like this.
This broken line means
both terminals are in
connector C134.
a.
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:-lName of Circuit

Connectors - "C"
The cavities (and wire terminals) in each
connector are numbered starting from the
upper left, looking at the male terminals trom
the terminal side (or looking at the female
lerminals f rom the wire side. Both views are in
the same direction so the numbers are the
same.) All actual cavities are numbered, even
if they have no wire terminals in them.
Terminal SldeolMale Tsrminals
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Wlre SldeotFemalg Trrmlnala
The connector cavity number is listed next to
each terminal on the circuit schematic. The
cavity/terminal shown below is #6.
Terminal
This means the connector
connects directly to the
componenr.
This means the connector
connects to a lead (pigtail)
wired directly to the
component.
Cavlty/Termlnsl 6
only the one affecting that
ciriuit will be shown. The f
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I
Remaining wires to
the same bus are
represented by a
broken line.
The name of the
component appears next
to its upper right corner
followed by notes about
its function.
This symbol represents
one bus inside the cao of a
iunction connector. A \
lr"ctb. connectorcap |contains several buses, but Ac103
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See Gauges
Splices
Solices are shown as a dot. Their location
and the number of wires may vary
depending on the harness manufacturer.
Components
A solid border line means the
entire component is shown.
A broken border line indicales
that only part of the component
is shown.
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BRAXEswtTcHClosed wilhpedaldepressed.

Five-Step Troubleshooting
L Verify The Complaint
Turn on all the components in the problem
circuil lo check the accuracy of the customer
complaint. Note the symptoms. Do not begin
disassembly or testing until you have
narrowed down the problem area.
2. Analyze The Schematic
Look up the schematic for the problem
circuit. Determine how the circuit is
supposed to work by tracing the current
paths lrom the power source through the
circuit components to ground. Also, trace
circuits that share wiring with the problem
circuit. The names of circuits that share the
same fuse, ground, or switch, and so on, are
referred to in each circuit schematic. Try to
operate any shared circuits you didn't check
in step 1 . lt the shared circuits work, the
shared wiring is OK, and the cause must be
in the wiring used only by the problem
circuit. lf several circuits fail at the same
time, the fuse or ground is a likely cause.
Based on the symptoms and your
understanding of the circuit's operation,
identify one or more possible causes.
3. lsolate The Problem By Testing The Circuit
Make circuit tests to check the diagnosis
you made in step 2. Keep in mind that a
logical, simple procedure is the key to
efficient troubleshooting. Test for the most
likely cause of failure first. Try to make tests
at points that are easily accessible.
4. Fix The Problem
Once the specific problem is identified,
make the repair. Be sure to use proper tools
and safe procedures.
5. Make Sure The Circuit Works
Turn on all components in the repaired
circuit in all modes to make sure you've
fixed the entire problem. ll the problem was
a blown fuse, be sure to test all of the
circuits on that fuse. Make sure no new
problems turn up and the original problem
does not recur.
Test Equipment
Most circuits include solid-state devices.
Test the voltages in these circuits only with
a 1o-megaohm or higher impedance digital
mUltimeter. Never use a test light or analog
meter on circuits that contain solid-state
devices. Damage to the devices may result.
Test Light and DVOM
On circuits without solid-state devices, use a
test light to check for voltage. A test light is
made up of a 12 volt bulb with a pair of leads
attached. After grounding one lead, touch the
other lead to various points along the circuit
where voltage should be present. The bulb
will go on if there is voltage at the point being
tested. lf you need to know how much
voltage is present, use a digital
volVohmmeter (DVOM).
Self-Powered Test Light and DVOM
Use a self-powered test light to check for
continuity. This tool is made up of a light bulb,
battery, and tlvo leads. To test it, touch the
leads together: the light should go on.
Use a self-powered test light only on an
unoowered circuit. First, disconnect the
battery, or remove the fuse that feeds the
circuit you are working on. Select two points
in the circuit belween which you want to
check continuity. Connecl one lead of the
self-powered test light to each point. lf there
is continuity, the test light's circuit will be
completed, and the light will go on.
SELF-POWERED TEST LIGHT
lf, in addition, you need lo know exacW hc'.
much resistance there is between two oo'^=
use a digital volUohmmeter (DVOM)
acdrt'Cn
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How To Use This Manual
Troubleshooting Tests
Testing for Voltage Drop
Wires, connectors, and switches are designed
to conduct current wilh a minimum loss of
voltage. A voltage drop of more than one volt
indicates a Droblem.
'1. Place the digital volVohmmeter (DVOM) in
the appropriate DC volts range. Connect
the positive lead to the end of the wire
(or to the connector or switch) closest to
the bafterv.
Connect the negative lead to the other
end of the wire (or the other side of the
connector or switch).
Turn on the components in the circuit.
The DVOM will show the difference
in voltage between the two points. A
difference, or drop, of more than one
volt indicates a oroblem. Check the
circuit for loose, dirty, or bent terminals.
co
Testing lor a Short with a Test Light or DVOM
1. Remove the blown fuse and disconnect
the load.
2. Connect a test light or digital
oltr'ohmmeter
(DVOM), switched to the appropnare DC
volts range, across the tuse lerminals to
make sure voltage is present. You might
have to turn the ignition switch to ON:
check the schematic to see.
<-s80RT TOGFOUNO
Disconnecl lheload here.
Beginning near the luse box, wiggle the
harness. Continue this at convenient ooints
about six inches apart while watching the
test light or DVOM.
Where the test light goes off, or the DVOM
voltage drops to zero, there is a short to
ground in the wiring near that point.
NOTE: Always use a DVOM on high
impedance circuits. A test light may not
glow (even with battery voltage present).
3''
ffito.'"o'o
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TEST LIGHTolDVOM

- Manual Transmission
NOTE: For cars equipped with optional security system, see Security System, page 133-3, or 133-7, or 133-12
for starting system circuit schematic.
Starting System
c3s2PHOTA 8vtEw 27
WHT/BLKc415
FUSE 42to!a0a
UNDER-HOODFUSE/RELAYBOXI
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IELECTBICALIOADDETECTOR(ELO) UN|TPtloro I
Sae Po'/Y€rDislibution,pag€ 10.------JT1
Se6 GroundDislribution,page 14-6.
BATTERY
STARTERCUTRELAY
PHO|A 129198)PllO|O r35 f99 00)
a
BLK/FED
9
BLKAVHT
ct01
vlEW 2A
c4't9
vtEw 49
FUSE 31STAATER SICIIAL7.5A
STARTER
4
Sse PGM-FI,page 231ot 2+1.
UNDER-DASHFUSE/RELAYBOX
At3
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INTEGRATEDcol{tRoLut{llPHO|O U
r.------T-------------=;-*^:-lsrEERtNG
I i 1'----> R*.|?xf: iiiliffi' t"t%?I,,I Distribulion.1j;cx y' page 10.(0)
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---;;;;i[
cLUrcH TNTERLOCK tClosed wrlh clutch pedal Ifully depressed. llPHoro 1ra I"**"
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Se€ PowerDistibution,page 10.
4('98100 models 3)ALU/BLK
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21-2
I- G1

Keyless Receiver Unit Troubleshooting
lf a faulty keyless receiver unit has one of the symptoms below, turn to the page listed and follow the
appropriate troubleshooting procedure. lf the symptom seems related to an input problem, or is not covered
by the troubleshooting procedures, do the Input Tests on page 130-6. Refer to the circuit schematic on pages
1 30-2 and 130-3 as needed.
Symptom Index
Keyless Entry Does Not Work In Any Mode
Ceiling Light Does Not Come On When The Doors Are Unlocked
WithTheTransmitter ....
Doors Do Not Unlock Or Lock With The Transmitter . . . .
Horn Does Not Sound With The Transmitter "Beeo" Feature On
Horn Does Not Stop Sounding .......
Input Tests
Page 130-8
Page 130-9
Page 130-1 0
Page 130-11
Page 130-11
Page 130-11
Page 130-6
.1,

Keyless Receiver Unit Troubleshooting
lf a faulty keyless door lock control unit has one of the symptoms below, turn to the page listed and tollow the
appropriate troubleshooting procedure. lf the symptom seems relatod to an input problem, or is not covered
by the troubleshooting procedures, do the Input Tests on page 130-16. Refer to the circuit schematic on
pages 130-12 and 130-13 as needed.
Symptom Index
Keyless Entry Does Not Work In Any Mode
Ceiling Light Does Not Come On When The Doors Are Unlocked
With TheTransmitter ....
Doors Do Not Unlock Or Lock With The Transmitter . .
Horn Does Not Sound With The Transmitter 'Beep" Feature On .........
Horn Does Not Sound In The Panic Mode ..
HornDoes NotStopSounding ...............
Page 1 30-17
Page 130- 18
Page 130-1 I
Page 130-19
Page 130-19
Page 1 30-19
Page 130-16Input Tests
\.
130-15