1999 TOYOTA CAMRY light

POWER SOURCE
HEAD RELAY
2±1 : Closed with the light control SW at HEAD position or the dimmer SW at FLASH position
TAILLIGHT RELAY
5±3 : Closed with the light control SW at TAIL or HEAD position
I10 IGNITION SW
2±3 : Closed with the ignition SW at ACC or ON position
2±4 : Closed with the ignition SW at ON or ST position
7±6 : Closed with the ignition SW at ON or ST position
7±8 : Closed with the ignition SW at ST position
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
F9A28F12D28G228
F10B28F13E28I1030
F11C28F14F28J931
: RELAY BLOCKS
CodeSee PageRelay Blocks (Relay Block Location)
126Engine Room R/B No.1 (Engine Compartment Left)
326Engine Room R/B No.3 (Radiator Upper Support RH)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1A
1B22Cowl Wire and Instrument Panel J/B (Lower Finish Panel)1J22Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
1K
2A
2B
2C24Engine Room Main Wire and Engine Room J/B No.2 (Engine Compartment Left)
2F
gg(g)
2G
2K24Cowl Wire and Engine Room J/B No 2 (Engine Compartment Left)2L24Cowl Wire and Engine Room J/B No.2 (Engine Compartment Left)
: GROUND POINTS
CodeSee PageGround Points Location
EB34Left Radiator Side Support
IF36Instrument Panel Brace LH
: SPLICE POINTS
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
E334Cowl WireI238Cowl Wire
SERVICE HINTS

CHARGING
SLIG B
IC REGULATOR 2A 11T 81J2
A 3A1A2B1 10A
GAUGE 5A
IGN
30A
AM2
B±G
YB±R B±G
B±G
B±G
BATTERY FL MAIN
3. 0W
YB 1
A 1
B A F 1
B±R
100A
ALTF 2C1A 13
B 4
IJ2 4 5A
ALT±S 2L 42C31K 31K1 2
74
6 AM2 AM1ACC
IG1
IG2
ST2
140A
AM1 1K 21K5
1B 11B5
E 3
B B±RB±R
WW±R W±RW
IGNITION SW I10B±RB±Y
Y
R±LR±L IE2 4 2
1
EB1 6
F10 , F 9 ,
G 1
GENERATORA B, G 2
C10
CHARGE WARNING LIGHT
[COMB. METER]B A, C11
F1 1
FUSIBLE LINK
BLOCKF C, F14

C
A
,
C
A 4
IF IG3 6A A
B B
B CA A B A A C7. 5A
OBD FROM POWER SOURCE SYSTEM (
SEE PAGE 44)
1J 1015A
STOP
1C 7
1J 71R51R 4 1J 81 2
5416 7
ACG SG W G± R V±W
BRBAT SIL
BR
W± B W±BBR
G± W BR
W± B
G± WWB
G±RSTOP LIGHT SW DATA LINK
CONNECTOR 3
S 4 D 3
JUNCTION CONNECTORB J 6 J 7
A
JUNCTION
CONNECTORB J23 J24A
JUNCTION
CONNECTOR J 9 C
A 8
I 6 I 1 JUNCTION CONNECTOR J 2
BR(
SHIELDED)
(
SHIELDED) W
,
D 2D8
B±O
G±W
G±W
Y±R
B± O G±WG±RY±R V± W
(
SHIELDED) B±YBR BR BR BR
B±YBR BR BR BRFUEL W FUEL STP TACH
(
SHIELDED)
B± Y
BR
BR
BR
BR
E 4
ENGINE CONTROL MODULEB A, E 5 C, E 6 D, E 7
BR
G±W W
J 6
JUNCTION
CONNECTORB A, J 7

This system utilizes an engine control module and maintains overall control of the engine, transmission and so on. An outline
of the engine control is explained here.
1. INPUT SIGNALS
(1) Engine coolant temp. signal circuit
The engine coolant temp. sensor detects the engine coolant temp. and has a built±in thermistor with a resistance which
varies according to the engine coolant temp. thus the engine coolant temp. is input in the form of a control signal into
TERMINAL THW of the engine control module.
(2) Intake air temp. signal circuit
The intake air temp. sensor detects the intake air temp. , which is input as a control signal into TERMINAL THA of the
engine control module.
(3) Oxygen sensor signal circuit
The oxygen density in the exhaust gases is detected and input as a control signal into TERMINAL OX2 of the engine
control module.
(4) RPM signal circuit
Camshaft position and crankshaft position are detected by the camshaft position sensor and crankshaft position sensor.
Camshaft position is input as a control signal to TERMINAL G of the engine control module, and engine RPM is input
into TERMINAL NE.
(5) Throttle signal circuit
The throttle position sensor detects the throttle valve opening angle, which is input as a control signal into TERMINAL
VTA of the engine control module.
(6) Vehicle speed signal circuit
The vehicle speed sensor, installed inside the transmission, detects the vehicle speed and inputs a control signal into
TERMINAL SPD of the engine control module.
(7) Park/Neutral position SW signal circuit
The Park/Neutral position SW detects whether the shift position are in neutral, parking or not, and inputs a control signal
into TERMINAL STA of the engine control module.
(8) A/C SW signal circuit
The A/C amplifier is built in the engine control module. The signal from the A/C SW is input into TERMINAL A/CS of the
engine control module.
(9) Battery signal circuit
Voltage is constantly applied to TERMINAL BATT of the engine control module. When the ignition SW is turned on, the
voltage for engine control module start±up power supply is applied to TERMINAL +B of engine control module via EFI
relay.
(10) Intake air volume signal circuit
Intake air volume is detected by the manifold absolute pressure sensor (for manifold pressure) and is input as a control
signal into TERMINAL PIM of the engine control module.
(11) Starter signal circuit
To confirm whether the engine is cranking, the voltage applied to the starter motor during cranking is detected and the
signal is input into TERMINAL NSW of the engine control module as a control signal.
(12) Electrical load signal circuit
The signal when systems such as the rear window defogger, headlights, etc. Which cause a high electrical burden are
on is input to TERMINAL ELS as a control signal.
(13) Air fuel ratio signal circuit
The air fuel ratio is detected and input as a control signal into TERMINAL AF+ of the engine control module.
SYSTEM OUTLINE

HEADLIGHT
15A
HEAD
(
LH)15A
HEAD
(
RH)
3
4
16 OFF
TAIL
HEAD
LOW
HIGH
FLASH
LIGHT
CONTROL
SW DIMMER SW
2K 82G32G4
R±B
HEAD
RELAY
IFIE R±B
R
W±BW±B
R±B
R±BB
INTEGRATION RELAY BATTERY
FL MAIN
3. 0W
I11
32 41
40A
MAIN
2B 31 2
2G 62C8
213
123
B FBFBDBD
A F A F A D
A 1C 1
1J 79 8IE1 3
A B
AA B
B
COMBINATION SW C15
HIGH B EAM INDICATOR LIGHT
[COMB. METER] C11
JUNCTION
CONNECTOR J 9JUNCTION
CONNECTOR J 4 JUNCTION
CONNECTOR J30
HEADLIGHT
LH H 1
HEADLIGHT
RH H 2
R±Y
JUNCTION
CONNECTOR J 6
W±B
W±B R±L R±LR±B
R±L
R±BR±L
R±W B±G
R±B
R±L
F 9
FUSIBLE LINK BLOCKC A, F11
J25
JUNCTION
CONNECTORB A, J26
8717 13
A A
1J 8
W±B

HEAD RELAY
2±1 : Closed with the light control SW at HEAD position or the dimmer SW at FLASH position
C15 COMBINATION SW
13±16 : Continuity with the light control SW at HEAD position
8±16 : Continuity with the dimmer SW at FLASH position
7±16 : Continuity with the dimmer SW at HIGH or FLASH position
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
C1130H228J25A31
C1530I1130J26B31
F9A28J431J3031
F11C28J631
H128J931
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1J22Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
2B
2C24Engine Room Main Wire and Engine Room J/B No.2 (Engine Compartment Left)
2G
gg(g)
2K24Cowl Wire and Engine Room J/B No.2 (Engine Compartment Left)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
IE136Instrument Panel Wire and Cowl Wire (Lower Finish Panel)
: GROUND POINTS
CodeSee PageGround Points Location
IE36Left Kick Panel
IF36Instrument Panel Brace LH
SERVICE HINTS

LIGHT AUTO TURN OFF
40A
MAIN
2 12B 3
32 41
2K 8
B 3B B
R±B R±B
HEAD
RELAY
JUNCTION
CONNECTOR J30
A 1C 1F1F2 E 37. 5A
DOME FROM POWER SOURCE SYSTEM (
SEE PAGE 44)
2J 12
1W 1 23 15
1C 6 1B 4
B 2
IF 1J 71J8
OFF
TAI L
HEAD
LIGHT
CONTROL SW
B 1B4
11S 7
16 A
6 10
A71 AB±G
B±R
B±RB
B±R
G±R G±R
R R±GR±Y W± B
W± B
G
JUNCTION
CONNECTOR J 9
JUNCTION
CONNECTOR J 6
DOOR COURTESY SW
FRONT L H D 7 COMBINATION SW C15 FUSIBLE LINK BLOCKB
TAI LL I GHT
RELAY10A
GAU GE
BATTERY13 14
FL M AIN
3. 0W100A
ALT
C F 9 A , F1 1 F, F1425A
DOOR 1B 4
1D 1
B C
A A
A 13
L±W L±W
AAI11
INTEGRATION RELAYA B, I12 B±R
B±R
JUNCTION
CONNECTOR J 1
J31
JUNCTION
CONNECTORB A, J32
W± B

With the ignition SW turned on, the current flows to TERMINAL 7 of the integration relay through GAUGE fuse.
Voltage is applied at all times to TERMINAL (B) 2 of the integration relay through the TAILLIGHT relay coil side, and to
TERMINAL (B) 3 through the HEAD relay coil side.
1. NORMAL LIGHTING OPERATION

With the light control SW turned to TAIL position, a signal is input into TERMINAL (B) 1 of the integration relay. Due to this
signal, the current flowing to TERMINAL (B) 2 of the relay flows to TERMINAL (B) 1 to TERMINAL 14 of the light control SW
to TERMINAL 16 to GROUND, and TAILLIGHT relay causes taillights to turn on.

With the light control SW turned to HEAD position, a signal is input into TERMINALS (B) 1 and (B) 4 of the integration relay.
Due to this signal, the current flowing to TERMINALS (B) 3 and (B) 2 of the relay flows to TERMINALS (B) 4 and (B) 1 to
TERMINALS 13 and 14 of the light control SW to TERMINAL 16 to GROUND, and causes TAILLIGHT and HEAD relay to
turn the lights on.
2. LIGHT AUTO TURN OFF OPERATION
When the driver's door is opened with the lights on and the ignition SW off, the relay is activated, and the current flow from
TERMINAL (B) 2 of the relay to TERMINAL (B) 1, and from TERMINAL (B) 3 to TERMINAL (B) 4 are cut, and all the lights
are turned off.
HEAD RELAY
2±1 : Closed with the light control SW at HEAD position or the dimmer SW at FLASH position
TAILLIGHT RELAY
3±5 : Closed with the light control SW at TAIL or HEAD position
D7 DOOR COURTESY SW FRONT LH
1±GROUND : Continuity with the front LH door open
I11 (B), I12 (A)
INTEGRATION RELAY
7±GROUND : Approx. 12 volts with the ignition SW at ON or ST position
6±GROUND : Continuity with the front LH door open
1±GROUND : Always approx. 12 volts
10±GROUND : Always continuity
(A)13±GROUND : Always approx. 12 volts
(B) 2±GROUND : Always approx. 12 volts
(B) 3±GROUND : Always approx. 12 volts
(B) 4±GROUND : Continuity with the light control SW at HEAD position
(B) 1±GROUND : Continuity with the light control SW at TAIL or HEAD position
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
C1530I11B30J3031
D732I12A30J31A31
F9A28J131J32B31
F11C28J631
F14F28J931
SYSTEM OUTLINE
SERVICE HINTS