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文档简介
Headlight
FromPowerSourceSystem(SeePage48)
L–W
R–W
1
2
B
E
E
G
–
U
M
U
A
G
O
C
E
D
A
0
1
A
0
1
A
5
1
A18
AutomaticLight
ControlSensor
CLTB
1
CLTS
4
CLTE
3
1
IH
2
IG
1
B
W
–
L–W
W
–
R
–
R
R
Y
G
)
(
B
G
)
(
W)
1
1
1
–
–
–
*
*
*
G
(
223B
163B
123B
W
1
IE1
)
3
IE1
2
IE1
)
B
Y
O
)
R
1
1
1
–
R
–
–
G
–
G
–
G
*
*
*
R
(
(
(
3
12
IG
20
19
18
+B
CSB
CSO
CSE
CHG
T
H
HI
16
E
8
15
D2
DaytimeRunningLightRelay
7
2
Y
Y
R
–
R
83B
63C
43C
W
B
–
)
(
1
–
*
W
G
103B
53C
R
Y
Y
R
–
R
2
II2
3
IA4
13
12
8
9
Y
OFF
Tail
Low
High
Flash
W
S
W
S
l
r
o
e
1
r
m
tt
hn
m
go
iC
i
L
L
Head
r
o
t
a
B
–
W
r
e
n
e
1
GG
C12
CombinationSW
10
11
B
B
)
(
–
W
1
–
W
*
W–B
J6
Junction
Connector
W–B
A
A
11
4B
21
W–B
(*1)
A
4B
IE
ED
70
2004COROLLA(EWD533U)
L–W
R–W
L–W
R–W
R–B
FromPowerSourceSystem(SeePage48)
1
*1:USA
*2:w/ABS
*3:w/oABS
*4:w/FogLight
40A
HEAD
MAIN
2
1
W
S
B
–
R
n
o
i
t
a
n
i
R
R
b
1
m
o
C
P3
Parking
BrakeSW
1
1
1
2
3
5
B
O
)
(
4
–
R
–
G
*
D2
DaytimeRunningLightRelay
HEAD
Relay
11
4
PKB
FOG
1
1
R–B
Y
R
B
–
R
–
TAIL
14
DIM
BRK
DRL
1
H–LP
6
13
10
4
IA2
1
B
)
(
R
W)
W)
2
–
*
R
(
Y
R
Y
–
R
1
–
W
3
–
G
–
–
*
*
R
(
1
1
2
10A
HEADLH
LWR
10A
HEADRH
LWR
15IA5
15IA5
W
W
B
)
(
)
(
3
2
–
–
–
R
*
*
R
R
2
U
C
E
B
12
1
1
r
o
r
t
PKB
lo
nt
o
c
o
ra
e
t
i
nu
tn
c
n
u
ot
n
o
C
c
W
1
C
A
B
R
JJ
dh
–
1
R
)
)
it
w
k
w
i
SSw
o
L
(
o
L
(
W
–
H
R
R
H
L
2
1
2
t
t
h
h
l
g
g
1
e
1
IA4
i
i
v
e
L
d
d
2a
e
4a
e
W
S
d
HH
HH
i
u
1
lg
F
n
ei
n
k
BB
r
2aa
rW
B
B
B
–
R
–
R
–
R
2
R–B
B
–
W
I3
W–B
W–R
G–B(*1)
W–B
W–B
71
2004COROLLA(EWD533U)
Headlight
FromPowerSourceSystem(SeePage48)
L–W
R–W
R–B
*1:USA
15A
TAIL
W
B
–
R
–
L
7
IH
)
R
W
1
–
R–B
G–W
(*1)
*
G
(
1
7
IC
IL
1
1
3
3
1
1
2
3
5
1
2
3
5
1
4
y
a
l
y
e
10A
HEADLH
UPR
10A
HEADRH
UPR
a
R
l
e
R
E
R
L
M
I
A
M
W
T
I
–
D
L
2
1
2
1
1
3
3
1
204C
194C
R
W
B
–
)
(
)
(
R
–
G
1
1
*
G
*
W
R
R
R
–
R
6
IA6
10
IA2
W
W
R
–
)
(
G
1
–
–
*
W
L
R
14
5
4
18
m
a
e
B
h
H
W
g
i
R
–
R
)
)h
h
g
g
i
iH
H
(
(
2
1
2
H
H
L
R
t
t
h
h
g
g
i
i
l
l
d
d
a
e
a
e
1
3
1
13
C9
CombinationMeter
HH
HH
B
B
B
–
W
–
W
–
W
W–B
E4
W–R
G–B(*1)
W–B
B
B
–
W
–
W
W–B
ED
EA
72
2004COROLLA(EWD533U)
SystemOutline
ThecurrentisalwaysflowingfromtheHEADMAINfusetoHEADrelay(Coilside)toTERMINAL6ofthedaytimerunning
lightrelay,fromECU–BfusetoTERMINAL3ofthedaytimerunninglightrelayandfromtheTAILfusetoTAILrelay(Coil
side)toTERMINAL14ofthedaytimerunninglightrelay(USA).
WhentheignitionSWisturnedon,thecurrentflowingthroughtheGAUGEfuseflowstoTERMINAL12ofthedaytime
runninglightrelay.
1.DaytimeRunningLightOperation
Whentheengineisstarted,voltagegeneratedatTERMINALLofthegeneratorisappliedtoTERMINAL8ofthedaytime
runninglightrelay.Iftheparkingbrakeleverispulledup(ParkingbrakeSWon)atthistime,therelayisnotactivatedsothe
daytimerunninglightsystemdoesnotoperate.Iftheparkingbrakeleveristhenreleased(ParkingbrakeSWoff),asignalis
inputtoTERMINAL11oftherelay.
ThisactivatesthedaytimerunninglightrelayandtheHEADrelayisturnedtoon,sothecurrentflowsfromtheHEADMAIN
fusetotheHEADrelay(Pointside)toHEADLHLWR,HEADRHLWRfusestoTERMINAL2oftheheadlightstoTERMINAL
1toTERMINAL1ofthedaytimerunninglightrelaytoTERMINAL2toGROUND,causingtheheadlightstolightup
(Headlightslightupdimmerthannormalbrightness.).Oncethedaytimerunninglightsystemoperatesandtheheadlights
lightup,theheadlightsremainoneveniftheparkingbrakeleverispulledup(ParkingbrakeSWon).
IftheenginestallsandtheignitionSWremainson,theheadlightsremainlightupeventhroughcurrentisnolongeroutput
fromTERMINALLofthegenerator.IftheignitionSWisthenturnedoff,theheadlightsgooff.
Iftheengineisstartedwiththeparkingbrakeleverreleased(ParkingbrakeSWoff),thedaytimerunninglightsystem
operatesandheadlightslightupwhentheenginestarts.
2.HeadlightOperation
WhenthelightcontrolSWisswitchedtoHeadpositionandthedimmerSWissettoLowposition,causingthedaytime
runninglightrelayandtheHEADrelaytoturnon,sothecurrentflowsfromtheHEADMAINfusetoHEADrelay(Coilside)to
TERMINAL6ofthedaytimerunninglightrelaytoTERMINAL7toTERMINAL12ofthelightcontrolSWtoTERMINAL11to
GROUND.ThecurrenttoHEADrelay(Pointside)thenflowstoHEADLHLWR,HEADRHLWRfusestoTERMINAL2ofthe
headlights(Low)toTERMINAL1toTERMINAL1ofthedaytimerunninglightrelaytoTERMINAL2toGROUND,causing
theheadlightstolightupatnormalintensity.
WhenthelightcontrolSWisswitchedtoHeadpositionandthedimmerSWissettoHighposition,thesignalfromthe
dimmerSWisinputtothedaytimerunninglightrelay.ThisactivatesthedaytimerunninglightrelayandtheHEADrelayis
turnedon,sothecurrentflowsfromtheHEADMAINfusetoHEADrelay(Pointside)toTERMINAL1oftheDIMMERrelayto
TERMINAL2toTERMINAL13ofthedaytimerunninglightrelay,activatingtheDIMMERrelay.Thiscausescurrenttoflow
fromTERMINAL3oftheDIMMERrelaytoTERMINAL5toHEADLHUPR,HEADRH–UPRfusestoTERMINAL2ofthe
headlights(High)toTERMINAL1toGROUND,causingtheheadlightstolightupathighbeamandthehighbeamindicator
lighttolightup.
WhenthedimmerSWisswitchedtoFlashposition,thesignalfromthedimmerSWisinputtothedaytimerunninglightrelay.
ThisactivatesthedaytimerunninglightrelayandtheHEADrelayisturnedon,sothecurrentflowsfromtheHEADMAIN
fusetoHEADrelay(Pointside)toTERMINAL1oftheDIMMERrelaytoTERMINAL2toTERMINAL13ofthedaytime
runninglightrelay,activatingtheDIMMERrelay,andalsoflowsfromtheHEADLHUPR,HEADRHUPRfusesto
TERMINAL2oftheheadlightstoTERMINAL1toGROUND,causingtheheadlightstolightupathighbeamandthehigh
beamindicatorlighttolightup.
3.AutomaticLightControlOperation(USA)
WhenthedaytimerunninglightisoperatingandtheAutomaticcontrolsensordetectsadecreaseintheambientlight,the
automaticlightcontroloperationstarts.Atthesametime,daytimerunninglightrelayisactivated,socurrentflowsfromthe
TAILfusetotheTAILrelay(Coilside)toTERMINAL14ofthedaytimerunninglightrelay,andtheHEADMAINfusetothe
HEADrelay(Coilside)toTERMINAL6ofthedaytimerunninglightrelay,activatingboththeTAILrelayandtheHEADrelay,
sothatthetaillightsandheadlightslightup.
Whentheautomaticlightcontrolsensordetectsanincreaseintheambientlight,theignitionSWisturnedtooff,thelight
controlSWisturnedtoHeadposition,andtheautomaticlightcontroloperationstops.
73
2004COROLLA(EWD533U)
Headlight
ServiceHints
HEADRelay
1–2:ClosedwiththelightcontrolSWatHeadpositionorthedimmerSWatFlashposition
Closedwiththeenginerunningandtheparkingbrakeleverisreleased(ParkingbrakeSWoff)
D2DaytimeRunningLightRelay
12–Ground:Approx.12voltswiththeignitionSWatONposition
7–Ground:Approx.12voltswiththelightcontrolSWatHeadpositionorthedimmerSWatFlashposition
3,6,14–Ground:Alwaysapprox.12volts
11–Ground:Continuitywiththeparkingbrakeleverpulledup
8–Ground:13.2–14.0voltswiththeenginerunningat5000rpmand115°C(239°F)
2–Ground:Alwayscontinuity
16–Ground:ContinuitywiththedimmerSWatHighorFlashposition
10–Ground:Continuitywiththebrakefluidlevelnotenoughortheparkingbrakeleverpulledup
:PartsLocation
Code
A18
B2
SeePage
Code
G1
SeePage
Code
J1
SeePage
34
32
34
34
34
32
32
32
32
32
33
35
35
33
H1
J6
C9
H2
P3
C12
D2
H3
S1
H4
:RelayBlocks
Code
SeePage
RelayBlocks(RelayBlockLocation)
1
3
22
28
EngineRoomR/B(EngineCompartmentLeft)
RHR/B(RightSideoftheInstrumentPanelReinforcement)
:JunctionBlockandWireHarnessConnector
Code
IC
SeePage
JunctionBlockandWireHarness(ConnectorLocation)
25
EngineRoomMainWireandInstrumentPanelJ/B(LowerFinishPanel)
IG
25
24
IH
InstrumentPanelWireandInstrumentPanelJ/B(LowerFinishPanel)
IL
3B
3C
4B
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