2003 HONDA CIVIC ERS

Battery
{Battery Test
Use either a JCI or Bear ARBST tester, and follow the
manufacturer's procedures. lf Vou don't have one of
these computerized testers, follow this conventional
test procedure:
1. Be sure the temperature of the electrolyte is
between 70'F (21"C) and 100'F (38'C).
2. Inspect the battery case for cracks or leaks.
. lf thecase isdamaged, replacethe battery.l. lf the case looks OK, go to step 3.
3. Check the indicator EYE.
. lf the EYE indicatesthe baftery ischarged, goto
step 4.. lf the EYE indicatesa lowcharge, gotostep7.
4. Apply a 300 amp load for 15 seconds to remove the
surface charge.
5, Wait 15 seconds, then apply a test load of 280 amps
for 15 seconds.
6. Record battery voltage.
. lf voltage is above9.6volts,the battery isOK.l. lf voltage is below9.6volts, gotostepT.
7. Charge the battery on High (40 amps) until theEYE
shows the battery is charged, plus an additional 30
minutes. lf the battery charge is very low, it may be
necessary to bypass the charger's polarity
protection circuitry.
. lf the EYE indicatesthe battery is chargedwithin
3 hours, the battery is OK.l. lf the EYE indicatesthe battery is notcharged
within 3 hours, replace the battery.l
A battery can explode if you do not follow the
proper procedure, causing serious injury to anyone
nearby. Follow all procedures carefully and keep
sparks and open flames away from the battery.
22-50

Relays
Power Relay Test
Use this chan to identify the type of relay, then do the
test listed for it.
NOTE: Turn signal/hazard relay input test (see page 22-
87).
RelayTest
A'lC comoressor clutch relavNormally-open
type AAirlfuel ratio sensor relav
Condenser fan relay
Headlioht relav 1
Headliqht relav 2
Horn relav
Power window relay
Radiator Ian relay
Reverse relav
Starter cut relav
Tailliqht relaV
Daytime running lights relay
{Canada )
PGM-FI main relav 1
PGM-Fl main relav 2
Blower motor relavNormally-open
tvpe BRear window defoqoer relav
Moonroof close relayFive terminal
typeMoonroof oDen relav
Low beam cut relav {Canada)
Normally-open type A:
Check for continuitv between the terminals.
. There should be continuity between the No. 1 and
No,2 terminals when power and ground are
connected to the No. 3 and No. 4 terminals.. There should be no continuity between the No. 1 and
No.2 terminals when power is disconnected.
type 1:
type 2:
PGM-FI main relay 1
PGM-FI main relay 2
type 1:
type 2:
(cont'd)
22-51

'- --t
I DAYTIME I! BUNN|NG ;i LIGHTS II @NTROLI UNII iL -.-.. Iicmadd
./ ib-n'rnoLtNGniEorL UNITPRESSUBEswtTcHlCld.d Eisin.3topp.d liopd Ersin.runni.s i
(cont'd)
22-61

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

IJVSS Replacement
1. Remove the intake resonator.
2. Disconnect the 3P connector from the vehicle
speed sensor {VSS) (A).
4.
Remove the mounting bolt, then remove the VSS.
lnstallthe VSS in the reverse order of removal.
22-67

5
Turn the low beams on.
Determine ifthe headlights are aimed properly.
Vertical adjustment:
Measure the height ofthe headlights (A). The lights
should reflect 52 mm (2.'1 in.) below headljght
height (B).
6. lf necessary, adjust the headlights to local
requirements by turning the vertical adjuster.
i
Headlight Replacement
Remove the front bumper (see page 20-85).
Disconnect the connectors (A) from the headlight(B).
Remove the five mounting bolts, then remove the
corner upper beam (C) and headlight assembly.
Install in the reverse order of removal.
After replacement, adjust the headlights to local
requirements.
'1.
2.
5.
22-79

Exterior Lights
4.
5.
Combination Light Switch Test/Replacement
1. Remove the driver's dashboard lower cover (see page 20-60).
2. Remove the steering column covers (see page 17-9).
3, Disconnectthe l6Pconnector(A) f rom the combination light switch (B).
Remove the tlvo screws, then slide out the combination light switch.
Inspect the connector terminals to be sure they are all making good contact.
. lf the terminals are bent, loose or co rroded, repa ir them as necessa ry, a nd recheck the system..lftheterminalslookOK,checkforcontinuitybetweentheterminalsineachswitchpositionaccordingtothe
tables.- lf the continuity is not as specified, replace the switch.
Light switch:
Telmint
Position451213
Headlight switch
OFF
LOWo--
HIGHo--
Passing switch
OFF
ONo-
Turn signalswitch:
Terminal
Position21011
LEFT----o
NEUTRAL
RIGHTo--
22-80

Bulb Replacement
Headlight:
1. Disconnect the 3P connector (A) from the headlight.
Headlight {high/low): 60/55 W
f-rI-'-+lA- )/
Remove the rubber cover (B).
Pull the retaining spring (C) away from the bulb (D),
then remove the bulb.
Install a new bulb in the reverse order of removal.
Make sure the notches in the bulb align with the
tabs ln the headlight.
2.
Front Turn Signal Light:
Parking Light:
1. Remove the inner fender (see page 20-102).
2. Disconnectthe connectors (A) from the lights.
21W
5W
4.
Front turn signal light:
Parking light:
Turn the bulb sockets (B) 45'counterclockwise to
remove them from the headlight housing.
Installthe new bulb(s) in the reverse order of
removat.
22-81