2003 HONDA CIVIC k2 terminal

Gharging System
Charging Circuit Troubleshooting (cont'd)
6. Start the engine. Hold the engine at 3,000 rpm with
no load (in Neutral) until the radiator fan comes on,
then let it idle.
7. Raise the engine speed to 2,000 rpm, and hold it
there.
8. Turn the headlights (high beam) on, and measure
voltage at the under-hood fuse/relay box terminal.
ls the voltage between 13.9 and 15.1 v?
YES-Go to step 9.
NO Repair or replace the alternator components
(see page 4-30).1
9. Read the amperage at '13.5 V.
NOTE: Adjust the voltage by turning the blower
motor, rear window defogger, brake lights. etc. ON.
ls the amperage 604 ot morc?
YES-Alternator/regulator operation is OK. I
NO Repair or replace the alternator components(see page 4-30).1
4-24
\,
Alternator Control System Test
NOTE: After troubleshooting, perform the engine
control module (ECM) idle learn procedure (see page
11-139).
1 . Check for proper operation of the electrical load
detector (ELD) by checking the malfunction
indicator lamp (MlL) (see page 1 l-3). lf a DTC is
present, diagnose and repair the cause before
continuing with this test.
2. Disconnect the engine wire harness 6P connector
from the starter sub harness 6P connector.
3. Start the engine, and turn the headlights (high
beam) ON,
4. Measure voltage between the engine wire harness
6P connector terminal No. 2 and the positive
terminal of lhe battery.
C {WHT/GRN)
ENGINE WIRE HARNESS 6P CONNECTOR
Wire side of female terminals
ls there 1 V or less?
YES Go to step 8.
NO-Go to step 5.
Turn the headlights and ignition switch OFF.
Disconnect ECM connector B (24P).
5.
6.
BATTERY

\
L
7, Check for continuity between ECM connector
terminal 818 and body ground.
ECM CONNECTOR B {24PI
123 t4 t561
8910,/1,/35
11ont,/2123
ACGC {WHT/GRN}
o
Wire side ot female terminals
9.
ls there continuity?
YES-Repair short to ground in the wire between
the alternator and the ECM.I
NO-Check that the terminals are firmly seated at
the ECM connector B. lf OK, substitute a known-
good ECM, and recheck (see page 11-6).
lf prescribed voltage is now available. replace the
original ECM,I
Turn the headlights and ignition switch OFF.
Disconnect ECM connector B (24P).
10. Check for continuity between ECM connector
terminal 818 and engine wire harness 6P connector
terminal No.2.
ACGC (WHT/GRN)
ECM CONNECTOR B l2,lPI
12314l5lll67
8910t.)15
11on2123
oC (WHT/GRN)
23
56
ENGINE WIRE HARNESS 6P CONNECTOR
Wire side oI lemale terminals
ls therc continuity?
YES Repair or replace the starter subharness or
the alternator (see page 4-30).I
NO Repair open in the wire between the
alternator and the ECM.I
4-25

Charging System
Alternator Overhaul
Exploded View
BEARING
PULLEYLOCKNUT
\-a
TERMINALINSULATOR
REAR HOUSINGASSEMBLY
INSULATORBUSHING
PULLEY
/
\/
/@
W|UF., .oy." -
/
REAR BEARING / ,/ ./ FRoNr B
@b.J.y{=RE+LN'"'
IvVFko"-% /
qtr*njlv
V( r),
"V
BRUSH \11BRUSH HOLOER HOLDER -\
TNSULATOR \l VOLTAGE }
\-
REGULATOR (-
@*F, -\:
v_re *^i
\gP^@' I
*ffilw9
ROTOR
4-30

L
Special Tools Required. Driver 07749-0010000. Attachment,52 x 55 mm 07746-0010400
NOTE: Refer to the Exploded View as needed during
this procedure.
1, Test the alternator and regulator before you
remove them (see page 4-22l,.
2. Remove the alternator (see page 4-29).
3. lf the front bearing needs replacing, remove thepulley locknut with a 10 mm wrench (A) and a
22 mm wrench (B). lf necessary, use an impact
wrencn.
Remove the harness bracket (A), insulator (B). three
flange nuts (C), and the screw (D), then remove theplate terminal (E).
,( ( , tt I;r_ lLt
5. Remove the end cover (A) anddustseal {B).
Remove the brush holder (A), voltage regulator (B),
and the rubber seal {C}.
6.
L1i.21---^
tqLJ
B-"--|.
(cont'd)
1!q[-dr,:l
4-31

Charging System
Alternator Overhaul (cont'd)
Rectitier Test
16. Check for continuity in each direction, between the
B terminal and P terminals, and between the E
terminal and P terminals of each diode pair.
All diodes should have continuity in only one
direction. Because the rectifier diodes are designed
to allow current to pass in one direction, and the
rectifier is made up of eight diodes (four pairs). you
musttest each diode in both directions for
continuity with an ohmmeter that has diode
checking capability: a total of 16 checks.
. lf any diode is faulty. replace the rectifier
assembly. {Diodes are not available separately.)' lf all the diodes are OK, go to step 17.
/--:',t- -L . --- -o \-- l'-=
BP"
P,
P.
P,
P.
4-34
19.
'a
Alternator Brush Inspection
17. Measure the length of both brushes (A)with a
vernier caliper {B).
. lf either brush isshorterthanthe service limit,
replace the brush assembly.. lf brush length is OK, go to step '18.
Alternator Brush Length:
Standard (New): 10.5 mm (0.41 in.)
Service Limit: 1.5 mm (0.06 in.)
Rotor Slip Bing Test
18. Check that there is continuity between the slip rings
{A).
. lf there is continuity, go to step 19.. lf there is no continuity, replacethe alternator.
Check that there is no continuity between each slip
ring and the rotor (B) and the rotor shaft (C).
. lf there is no continuity, goto step 20.. lf there is continuity, replace the alternator.
\"

Cruise Control
Symptom Troubleshooting Index
NOTE:' The numbers in the table showthetroubleshooting sequence.. Before troubleshooting.- check the No, 10 (7.5A) and No. 4 (10A) fuses in the under-dash fuse/relay box. and the No. 7 (15A) fuse in theunder-hood fuse/relay box,- check that the horn sounds.- check the tachometer to see if it works properly.- check the speedometer lo see if it works properly.
SymptomDiagnostic procedureAlso check forCruise control cannot be
set
1. Check main switch (see page 4-42)
2. Check SET/RESUME/CANCEL switch (see page 4-42)
3. Test brake pedal position switch (see page 22-84) and checkits adjustment {see page 19,6)
4. Test clutch pedal position switch (see page 4-45) and check
its adjustment (see page 12-41
5. Check cruise control unit {see page 4-40}
6. Check vehicle speed sensor (VSS) (see page 22-65)
. Poor ground:
G501. Open circuit,
loose or
disconnected
term inals:
LT GRN,
BLI(ORN.
GRY/RED, BLU.
LT BLU,
BLUAA/HTCruise control can be set
but indicator light does
not go on
1. Check cruise control indicator bulb in gauge assembly {seepage 22-631
2. Check cruise control unit (see page 4-40)
. Poor ground:
G501. Open circuit,
loose or
disconnected
termrnats:
YEL, BLUA/ELar, 'i.a c^aa.l ic
noticeably higher or
lower than what was set
1. Check vehicle speed sensor (VSS) {see page 22-65)
Check cruise control actuator {see page 4-43)
2. Check cruise control unit (see page 4-40)
Excessive overshooting
or undershooting when
trying to set speed
1. Check cruise control actuator (see page 4-43)
2. Check vehicle speed sensor (VSS) (see page 22-65)
Check cruise control unit (see page 4-40)
3.
Speed fluctuation on a
flat road with cruise
control set
1. Check vehicle speed sensor (VSS) (see page 22-65)
Check cruise control actuator (see page 4-43)
2. Check cruise control unit (see page 4-40)
Vehicle does not
decelerate or accelerate
accordingly when SET/
RESUME/CANCEL button
is pushed
1. Check SET/RESU ME/CANCEL switch (see page 4-42)2. Check cruise control unit {see page 4-40)
Open circuit, loose
or disconnected
terminals:
GRY/RED,
LT GRN/BLKSet speed does not
cancel (engine rpm stays
high) when clutch pedal
is pushed
1. Testclutch pedal position switch (see page 4-45) and checkits adjustment (see page 12-4)
2. Check cruise control unit (see page 4-40)
Short to ground in
the LT BLU wire
Set speed does not
cancel when brake pedal
is pushed
'1. Test brake pedal position switch (see page 22-84) and checkits adjustment (see page 19-6)
2. Check cruise control unit (see page 4-40)
Open circuit, loose
or disconnected
terminals:
WHT/BLK
4-38
g,

svmptomDiagnostic procedureAlso check for
Set speed does not
cancel when main switch
is oushed OFF
1. Check main switch (see page 4-42)
2. Check cruise control unit (see page 4-40)
Short to power in
the LT GRN wire.
Set speed does not
cancel when CANCEL
button is pushed
1. Check SET/RESU ME/CANCEL switch (see page 4-42)
2. Check cruise control unit (see page 4-40)
Open circuit, loose
or disconnected
terminals:
GRYiRED,
LT GRN/BLK
Set speed will not
resume when RESUME
button is pushed (with
main switch on, and set
speed temporarily
cancelled by pressing the
brake Dedal)
1. Check SET/RESU ME/CANCEL switch (see page 4-42)
2. Check cruise control unit {see page 4-40)
Open circuit, loose
or disconnected
terminals:
LT GRN/BLK
4-39

Cruise Gontrol
Cruise Control Unit Input Test
SRS components are located in this area. Reviewthe SRS component locations (see page 23-'13) and precautions andprocedures (see page 23-14) in the SRS section before performing repairs or service.
1. Disconnect the 14P connector from the control unit.
2. Inspect the connector and socket terminals to be sure they are all making good contact.
. lf the terminals are bent, loose, orcorroded, repairthem as necessary, and recheckthe system.. lf the terminals look OK, go to step 3.
Wire side offemale terminals
3. With the 14P connector disconnected, make these inDut tests.
CavityWireTest conditionTest: Desired resultPossiblecause ifresuh is not obtained
BRN/WHTConnect battery
power
Check the operation of the
magnetic clutch: Clutch
should click and output link
should be locked.
' Faulty actuator. Poor ground (G301)
. An open in the wire. Shon to ground (arcs when
Dower is connected)
2BLUlgnition switch ON(ll), main swltch ON
and brake pedal
pressed, then
reteaseo
Check for voltage to ground;
There should be 0 V with lhe
pedal pressed and battery
voltage with the pedal
released.
. Faulty brake pedal position
switch. An open in the wire. Open in cruise control main
swrtcn. Blown No. 4 (10 A)fuse in the
under/dash fuse/relav box
3BLKUnder all conditionsCheck for continuity to
grouno:
There should be continuitv
. Poor ground (G501)
. An open in the wire
BLIVORNlgnition switch ON
flr)
Check for voltage to ground:
There should be battery
vottaqe.
Blown No. 4 (10 A)fuse in the
under-dash f use/relay box
An oDen in the wire
5WHT/BLKBrake pedal pressed,
then released
Check for voltage to ground:
There should be battery
voltage with the pedal
pressed, and 0 V with thepedal released.
Blown No. 7 {15 A) fuse in the
under-hood fuse/relay box
Faulty brake pedal position
SWIICN
An oDen in the wire
4-40