replace indicator relay HONDA CIVIC 2003 7.G User Guide

Gauges
2.
3.
Gauge Assembly Replacement
1.Remove the instrument panel (see page 20-59),
then remove the upper column cover {see page 17-
Place a clean shop towel (A) under the gauge
assembly to prevent scratching the steering
colum n or dash panel.
Remove the screws from the gauge assembly (B).
Disconnect the connectors (C), and remove thegauge assemDry.
Installthe gauge assembly in the reverse order of
removal.
Coolant Temperature Gauge
Troubleshooting
Before testing, check the No. I { 10A) fuse in the under-
hood fuse/relay box and the No. '10 (7.5A) fuse in the
under dash fuse/relay box.
1. Start the engine, and check the malfunction
indicator lamp (MlL).
Does the MIL come on?
YES- Troubleshoot the cause of the ECM DTC (see
page 1 1-57), and recheck.
NO-Go to step 2.
2. Check for a multiplex control unit DTC (see page
22,168).
ls a DTC ind icated?
YES Troubleshooting the cause of the multiplex
control unit DTC {see page 22-168), and recheck.
NO Go to step 3.
3. Do the communication line check with the self-
diagnosis procedure (see page 22-56).
ls the word "Error" indicated on the odo/ttip
d isplay ?
YES The gauge cannot receive the signal from the
multiplex control unit and the ECI\,4. Check for an
open in the WHT/GRN wire (gauge connector
terminal B 13). lf no open is found, go to step 5.
NO Go to step 4.
4. Do the gauge drive circuit check with the self-
diagnosis procedure (see page 22-56).
Does the temperature gauge needle sweep lrom
the minimum position to the maximum, then tetutn
to the minimum position?
YES Go to step 5.
NO Replace the gauge assembly.l
5. Substitute a known-good ECM and recheck.
Did the symptom/ ind ication go away?
YES Replace the ECM.
NO Substitute a known good gauge assembly. lf
the symptom/indication goes away, replace thegauge assembly.l
4.
22-64

Exterior Lights
Component Location Index (cont'dl!
DAYTIME RUNNING LIGHTS RELAY {Canadal[Wire colors: RED, REDryEL, ILRED/BLK and RED/BLU ITest, page 22-51
_LOW BEAM CUTRELAY {Canadal _Wire colorsr REDMHT, RED/BLK, ILREDryEL and RED/BLU ITest, page 22-51
DASH LIGHTS BRIGHTNESSCONTROLLER
/
COMBINATION LIGHT SWITCHTesVReplacement, page 22-80
oAYTIME RUNNING LIGHTS CONTROL UNIT lcanada)Input Test, page 22-76
DRL INDICATOR LIGHT {Canadal
HIGH BEAM INDICATOR LIGHTBulb Replacement, page 22-63
UNDER.DASH FUSE/RELAY BOX
:' --,': - '
' i,-'-'l
..i \
I t- -
22-70

4. Make these input tests at the connector,
.lfanytestindicatesaproblem,findandcorrectthecause,thenrecheckthesystem.
. lf all the input tests prove OK, the control unit must be faulty. Replace it.
CavityWireTest conditionTest: Desired resultPossible cause if result is not obtained2R E D/BLUUnder all
conditions
Check for voltage to ground:
There should be battery voltage.
Blown No. 14 (40A) fuse in the
under-hood fuse/relay box
Blown No. 3 {10A)fuse in the
under-dash fuse/relay box
An open in the wire12YE L/RE Dlgnition switch
oN (r)Check for voltage to ground:
There should be battery voltage.
Blown No. l2 (7.5A)fuse in the
under-dash fuse/relay box
An open in the wire
BLKUnder all
conditions
Check for continuity to ground:
There should be continuitv.
. Poor ground {G50'1). An oDen in the wire7BLKUnder all
conditions
Check for continuity to ground:
There should be continuitv.
. Poor ground (G501)
' An open in the wire
10REDI/ELCombination
light switch ON/ =f\
Check for voltage to ground:
There should be battery voltage.
Blown No. 15 (15A) fuse in the
under-hood fuse/relay box
Faulty headlight relay 2
Faulty combination light switch
An open in the wire
1RED/B LUCombination
light switch ON
{iD), and
dimmer switch
in HIGH
Connect a jumper wire between
No.3 and No. 1 terminals.
Both headlights (HIGH) and
h igh beam indicator light
should come on.
Blown bulb
Faulty low beam cut relay
Faulty combination light switch
Poor ground (G50'l )
An open in the wire'11
3
RED/BLK
GRN/BLK
Combination
light switch ON(iD), and
dimmer switch
in HIGH
Com bination
light switch ON(iD), and
dimmer switch
in HIGH
Connect a jumper wire between
No. 5 and No. 11 terminals.
Right headlight (HIGH) should
come on.
Check for continulty to ground
There should be continuity.
. Blown bulb. Faulty combination light switch. Poor ground (G 50'1 ). An open in the wire
. Faulty combination light switch. Poor grou nd {G501). An open in the wire
5
6GRN/ORNParking brake
lever oulled
Check for continuity to ground:
There should be continuitv.
Faulty parking brake switch
An open in the wire
8BLU/REDCombination
light switch OFF
Check for voltage to ground:
There should be battery voltage.
Faulty headlight relays
Short to ground
An ooen in the wire
WHT/BLUlgnition switch
oN 0r)
Attach to ground:
The DRL indicator light should
come on.
. Blown No. 10 (7.5A) fuse in the
under-dash fuse/relay box. Faulty DRL indicator. An ooen in the wire
t5G RN/REDlgnition switch
oN (||)Attach to ground:
The brake system light should
come on.
Faulty brake system indicator
An open in the wire
22-77

Turn Signal/Hazard Flasher
Component Location Index
COMBINATION LIGHT/TURN SIGNAL SWITCHTest, page 22-80Beplacement, page 22-80
TURN SIGNAL INDICATOR LIGHTS(ln the gauge assembly)Bulb Replacement, page 22'63
HAZARD WARNING SWITCHTest, page 22-88Replacement, page 22-88
TURN SIGNAL/HAZARD RELAYInput Test, page 22-87
UNDER.DASH FUSE/RELAY BOX
22-85

Multiplex Control System
Multiplex Control Unit lnput Test (cont'd)
3. Inspect the connector and socket terminals to be sure they are all making good contact
.lftheterminalsarebent,looseorcorroded,repairthemasnecessary,andrecheckthesystem. llthe terminals look OK, go to step 4.
4. Reconnectthe connectorstothe under dash fuserelay box, and make surethese inputtests atthe appropriate connectors on lhe under-
dash fuse/relav box.
. lf any test indicates a problem, {ind and correct the cause, then recheck the system. lf allthe input tests prove OK, the multiplex control unit must be faulty. Replace the under_dash fuse/relay box assembly
CavitvWireTest conditionTest: Desired .esult r Possible cause if resullE qS!q!!e!!ed
J4BLK[J nder all conditionsCheck {or voltage 1o ground:Therc sholl.l he 1V or lessPoor ground (G20'l)An ooen in the wire
Y6BLKlJnder all conditionsCheck for voltage to ground:There should bc 1 V or less.Poor ground 1G501)An ooen in the wire
Y1BFNryELParking brake leverdown, turn theigntion switch ON (ll)
Check for voltage to ground:There should be battery voltagewhile the Brake system indicator ison forthe buld check.
An open in the wireShortto groundFaulty ABS modulatorcontrol unit
Check for voltage to ground:There should be 1V or less when the
J2WHT/REDUnder allconditionsCheck for voltage to groundiThere should be baftery voltage.Blown No.9 (10A)fuse in the under'hoodfuse/relay boxAn oncn in rhc wire
CavitvTest conditionTesi: Oesired resultPossible cause ifresult is notobtained
o3GRNDriver's door openCheck for voltage to ground:There should be 1 V or less-Faulty driver's door switchAn ooen in the wire
Driver's door closedCheck for voltage to ground:There should be 5 V or more.Faulty driver's door switchShort to qround
O4LT GRN/REDPassenger's doorCheck .for voltage 10 ground:There should be 1 V or less.Faulty passenger's door switchAn ooen inthewire
Passenger's doorCheck for voltage to ground:There should be 5 V or more.Faulty passenger's door switchShort to oround
osI]l.l
4.,
F1
F8
GRN/ORN
GRN/ORN
GRN/RED(USA)GRN/ORN(Canada)
Parking brake leverCheck for voltage to groLrnd:There shorl.l be 1 V or less.Faulty parking brake switch. An ooen in thewireCheck for voltage to ground:There should be 5 V or more.
. Faulty parking brake switchShortto ground
o5BLU/REDlgnition switch ON (ll),
driver's seat belt isCheck for voltage to ground:There should be 1V or less.Faulty driver's seat belt switchPoorground (G551)An oDen in the wire
Q6BLU/REDlgnition switch ON (ll)
driver's seat belt isbuckled.
Check {or voltage to ground:There should be 6 V or more.Faulty driver's seat belt switchShortto ground
P18RED
H",=
Check for voltage to ground:There sho0ld be 1V or less-
f -9*:li:'^:**:':s*:*
Faulty hatch latch swrtchPoor ground (G552)An open in the wireFaulty hatch latch switch
X5lgnirion key in the Check for voliage to gtound:ignit on switch Thpre should be I V or lcss
lgnrtron kev our o{ the Check for vollage to ground:
. Faulty ignition key switch. Poor ground (G401). An open in the wire
I : [11y.'::i':::1"' **6
\
22-176

sRs
6.
SRS Indicator Circuit Troubleshooting (cont'dl
7.
Disconnect SRS unit connector C (8P) from the SRS
unit {see step 7 on page 23-22).
Disconnect gauge assembly connector A (22P).
Connect a voltmeter between the No, l4terminal of
gauge assembly connector A (22P) and body
ground. Turn the ignition switch ON (ll), and
measure voltage. There should be 0.5 V or less.
GAUGE ASSEMBLY CONNECTOR A {22P)
Wire side of female terminals
ls the voltage as specitied?
YES-Faulty SRS unit; replace the SRS unit (see
page 23-'l22l.a
NO-Short to power in the PNK wire of dashboard
wire harness A or in the floor wire harness; replace
the faulty harness.l
L Turn the ignition switch OFF. Check the No. 10
{7.5A)fuse in the under-dash fuse/relay box.
ls the tuse blown?
YES-Go to step 10.
NO Go to step 9.
23-106
J
9. Connect a voltmeter between the No.2 terminal of
gauge assembly connector B (22P) and body
ground. Turn the ignition switch ON (ll), and
measure the voltage. There should be battery
voltaqe.
GAUGE ASSEMBLY CONNECTOR B (22P}
YEL
12345X68910
ll12,/ ,/,/x11o2122
Wire side of female terminals
ls therc battery voltage?
YES Faulty SRS indicator circuit in the gauge
assembly or poor contact at gauge assembly
connector B (22P) and the gauge assembly; if the
connection is OK, replace the gauge assembly.l
NO Open in the under-dash fuse/relay box No. 10
(7.5A) fuse circuit, or open in the YEL wire of
dashboard wire harness A. lf the under-dash fuse/
relay box is OK, replace lhe faulty harness.l
Replace the No. 10 (7.5A) fuse, then check to see if
the indicators comes on.
Do the indicators come on?
YES The system is OK at thls time.l
NO Repair the short to ground in the under-dash
fuse/relay box No. 10 (7.5A)fuse circuit.l
10.

JI
I
The SRS lndicator Stays On When ln "SCS"
Menu Method
NOTE:. lf you cannot retrieve DTCSwith the PGM Tester
using the SRS menu method. retrieve the flash codeswith the Tester in SCS mode {see page 23-24|,.. A new SRS unit must sense the entire system is OK
before completing its initial self-test. The most
common cause of an incomplete self-test is the
failure to replace all deployed parts after a collision,
in particular, seat belt tensioners and seat belt buckletenstoners.. An incomplete self-test prevents the PGM Tester fromretrieving DTCS, although flash codes are available in
the Tester's SCS mode.
1 . Erase the DTC memory using the MES connector(see page 23-26).
Does the SRS indicator go off while you are
erasing the DTC memory?
YES-Go to step 42.
NO Go to step 2.
Check the No. '13 { 10A) fuse in the under-dash
fuse/relay box.
lsthe f use OK?
YES--Go to step 19.
NO Go to step 3.
Replacethe No. 13 (10A) fuse.
Turn the ignition switch ON (ll), and wait for 30
seconds. Then turn the ignition switch OFF.
Check rhe No. 13 (10A) fuse.
ls the f use OK?
YES The system is OK at this time.I
NO Go to step 6.
3.
I
6. Replace the No. 13 (10A) fuse.
7. Turn the ignition switch OFF. Disconnect the
battery negative cable, and wait for 3 minutes.
8. Disconnect the driver's airbag 4P connector (see
step 2 on page 23-21).
9. Disconnect the front passenger's airbag 4P
connector (see step 3 on page 23,21).
10. Disconnect both seat belt tensioner 2P connectors(see step 5 on page 23-221.
'11. DisconnectSRS unitconnectorA{18P)fromthe
SRS unit (see step 7 on page 23-22],.
'12. Reconnect the battery negative cable.
13. Turn the ignition switch ON (ll), and wait for 30
seconds. Then turn the ignition switch OFF.
14. Checkthe No. 13 ('10A) fuse.
ls the f use OK?
YES-Short to ground in the SRS unit; replace the
SRS unit (see page 23-122).a
NO Go to step 15.
15. Replace the No. 13 (10A) fuse.
{cont'd)
23-107

sRs
from the under-dash fuse/relav bor.
11.
18.
SRS Indicator Circuit Troubleshooting (cont'd)
'16. Disconnect dashboard wire harness B connector S
Turn the ignition switch ON {ll), and wait for 30
seconds. Then turn the ignition switch OFF,
Check the No. 13 (10A) fuse.
ls the f use OK?
YES Short to ground in dashboard wire harness
B; replace dashboard wire harness B.I
NO-Short to ground in the under-dash fuse/relay
box; replace the under-dash fuse/relay box.l
Turn the ignition switch OFF. Disconnect the
battery negative cable, and wait for 3 minutes.
Disconnect the driver's airbag 4P connector (see
step 2 on page 23-2'l).
Disconnect the front passenger's airbag 4P
connector (see step 3 on page 23-21).
Disconnect both seat belt tensioner 2P connectors
(see step 5 on page 23-22).
Disconnect SRS unit connector A (18P) from the
SRS unit (see step 7 on page 23-22).
19.
20.
21.
22.
23-108
24.Beconnect the battery negative cable.
Connect a voltmeter between the No. 3 terminal of
SRS unit connector A (18P) and body ground. Turn
the ignition switch ON (ll), and measure the voltage.
There should be baftery voltage.
SRS UNIT CONNECTOR A (18PI
Wire side of female terminals
ls there battery voltage?
YES Go to step 29.
NO Go to step 26.
Turn the ignition switch OFF.
Disconnect dashboard wire harness B connector S
26.
27.
PNK
from the under-dash fuse/relav box.

I
28. Check resistance between the No. 3 terminal of
SRS unit connector A (18P) and the No. 2 terminal
of dashboard wire harness B connector S. There
should be 0 1.0 0.
DASHBOARD WIRE HARNESS B CONNECTOR S
Wire side offemale term
l2
rna lsPNK
a,
PNK T SRS uNrr
l23578I
101112l314151611l8
CONNECTOR A I18P)
I
Wire side of female terminals
ls the rcsistance as specified?
YES-Open in the under-dash fuse/relay box orpoor contact at dashboard wire harness B
connectors; check the connection. lf the connection
is OK, replace the under-dash fuse/relay box.l
NO-Open in dashboard wire harness B; replace
dashboard wire harness B.I
Turn the ignition switch OFF.
Disconnect SRS unit connector C {8P) from the SRS
unit (see step 7 on page 23-22],.
29.
30.
I
SRS UNIT CONNECTOR C I8P}
31. Connect the No. 3 terminal ofSRS unitconnectorA(18P) and the No. 5 terminal of SRS unit connector
C (8P)with a jumper wire.
PNK
JUMPERWIRE
PNK
Wire side of female terminals
SRS UNIT CONNECTOR A I18P)
Wire side of temale terminals
32. Turn the ignition switch ON (llf .
33. Check the SRS indicator.
Did the SRS indicator go off?
YES Faulty SRS unit; replace the SRS unit (see
page 23-122l.a
NO-Go to step 34.
34. Turn the ignition switch OFF.
35. Disconnect the jumper wire between the No. 3
terminal of SRS unit connector A (18P) and the
No. 5 terminal of SRS unit connector C (8P).
36. Check the No. 13 (10A)fuse in the under,dash
fuse/relay box.
ls the f use OK?
YES Go to step 40.
NO Go to step 37.
37. Replace the No. 13 {10A)fuse.
(cont'd)
23-109

Service Manual lndex
)s
NOTE: Referto the lollowing listto look up A/C Pressure Switch CircuitDTCS, symptoms, fuses, connectors, wire Troubleshooting ......... ...-.-....-...-.-.-....-..21-32 Bharnesses, specifications, maintenanceschedules, and general serviceinlormation:
DTC Troubleshooting Indexes
A/C Signal CircuitTroubleshooting.........................-...... 11-'133 Back-up Light SwitchTest .......................................................... 13'3A/F lAir Fuel Ratiol SensorABS/TCS Components ........................ 19-34 Replacement ....................................... 1 1-113 Back-up Li9ht3EPS Components ................................. '17-22 Circuit DiagramFueland Emissions11-i A-Dillar Corner Trim
ABS Indicator Circuit
Heating/Ventilation ................................ 21-9 Replacement ...............-.....-..............-.... 20,96 Ball Joint BootssRS ........................................................ 23-28Replacement ......
... 19-52 Ball Joints
22-75
18 16
Remova1.............-.......... . ...........18-10Symptom Troubleshooting Indexes TroubleshootingABS/TCSComponents........................ 19 35Cruise Control System ..........................4 38 ABS Modulator-contml UnitEPS Components ................................. 17-23 Bemoval/lnstallation ............................ 19-57 BettervFan Controls10,12
Accessory Powor Socket Front
Blowor Pow€r Transistor
.......22 50
Blower UnitRemoval/lnstallation ............................ 21-39
Fuel and Em issions .............................. 11-10 ABS/TCS ComoonentsHeating/Ventilation..............................21 10 Component Location Index ................. 19-30 Beverage Holder
SRS ........................................................ 23'30 CircuitDiaqram.......................... 19'42Blower MotorReplacement .....21 41
21-38
Power 0istribution ...............................22-46 TesVReplacement .............................. 22'149Under-dash Fuse/Relay Box ............... 22 45Under-hood Fuse/Belay Box ...............22 44 Accessory Power Sockets
Fuse/Relay lndexes
(to harness)
Connector and Wire Harness lndexesComponent Connectors
Circuit Oiagram .................................. 22-149
Air Cleaner......2214 Rep1acemen1.....................................11-162
Air MixControl MotorMeintenence section .................... Section 3 Replacement ......................................... 21'34 Brake CelipersTest......................21-34 Overhaul19-14,23Gene.al lnlormation section........ Section 1
21.57
Airbag. Driver's
Ahernator FR Signal CircuitTroubleshooting .... .........-..........11 134
AntennaReplacement
Inspection ............................................. 19-24Rep|acement................. .................... 19-25
Bieke Meder Cylinder
Irake Discs
A
Replacement ....................................... 23 1 'l3 Inspection .................... ................... 19-13,22Repair ...........-...................................... 23 1 16Brake Fluid Level SwitchAirbag. Front Passenger's TestBeplacement....................................... 23-1 14AIC Brake LightsComponent Location fndex ...................21-3 Altemator CircuitDiagram....................................22-74Description.....................................-....21'1'l Beplacement ................ ........................... 4 29CircuitDiagram....................................21-14 Overhaul .................................................4-30 Brake Lines and Hoses
19.10
A/C CompressolReplacement .......-...-............................. 21 -41
A/C Compr€ssor ClulchRep1acement......................................... 19-15.........22-103 Inspection ............................................. 19-16Inspecton........Overhaul ..........
A/C CondenserReplacement,.,
21-442l-49 Audio Unit
Replacement
Brake PadsRemoval/lnstallation .. ........................22-100 Inspection/Rep1acement................ 19-11,20A/C Compressor Clutch CircuitTroubleshooting ................................... 21-30 Audio Unit Connector Brake Pedal22101 Adjustment..............19,6ArfC Comoressor Relief ValvcReplacement ..........-...-.......................... 21-51 Audio/Entertainment
A/C Compr$sor Thermal Protector Circuit DiagramReplacement............-............................ 21-51
Component Location In dex .................22-9A Test .......-.............. 22-84Breke Pedal Posilion Switch
Brake Pedal Position Switch Signal Clrcuit11-137
.....21 52
A/C Condenser Fan CircuitTroubleshooting ................... . . . . . .....21-28
)s
Troubleshooting
(cont'd)