headlight TOYOTA CAMRY 1994 XV10 / 4.G Wiring Diagrams Workshop Manual

METER, ANALOG
Current flow activates a magnetic
coil which causes a needle to
move, thereby providing a relative
display against a background
calibration. LED (LIGHT EMITTING DIODE)
Upon current flow, these diodes
emit light without producing the
heat of a comparable light. IGNITION COIL
Converts low±voltage DC current
into high±voltage ignition current
for firing the spark plugs. 1. SINGLE
FILAMENT
GROUND
The point at which wiring attaches
to the Body, thereby providing a
return path for an electrical circuit;
without a ground, current cannot
flow.Current flow causes a headlight
filament to heat up and emit light.
A headlight may have either a
single (1) filament or a double (2)
filament. BATTERY
Stores chemical energy and
converts it into electrical energy.
Provides DC current for the auto's
various electrical circuits.
CAPACITOR (Condenser)
A small holding unit for temporary
storage of electrical voltage.
CIRCUIT BREAKER
Basically a reusable fuse, a circuit
breaker will heat and open if too
much current flows through it. Some
units automatically reset when cool,
others must be manually reset.
DIODE
A semiconductor which allows
current flow in only one direction.
DIODE, ZENER
A diode which allows current flow
in one direction but blocks reverse
flow only up to a specific voltage.
Above that potential, it passes the
excess voltage. This acts as a
simple voltage regulator.
FUSE
A thin metal strip which burns
through when too much current
flows through it, thereby stopping
current flow and protecting a
circuit from damage.
FUSIBLE LINK
A heavy±gauge wire placed in
high amperage circuits which
burns through on overloads,
thereby protecting the circuit.
The numbers indicate the cross±
section surface area of the wires.HORN
An electric device which sounds a
loud audible signal.
LIGHT
Current flow through a filament
causes the filament to heat up
and emit light.
METER, DIGITAL
Current flow activates one or
many LED's, LCD's, or fluorescent
displays, which provide a relative
or digital display.
MOTOR
A power unit which converts
electrical energy into mechanical
energy, especially rotary motion. CIGARETTE LIGHTER
An electric resistance heating
element.
DISTRIBUTOR, IIA
Channels high±voltage current
from the ignition coil to the
individual spark plugs.2. DOUBLE
FILAMENT HEADLIGHTS
FUEL
(for High Current Fuse or
Fusible Link.)
(for Medium Current Fuse)
M
16
GLOSSARY OF TERMS AND SYMBOLS

28
ELECTRICAL WIRING ROUTING
Position of Parts in Engine Compartment
[1MZ±FE]
A 2 A/C Triple Pressure SW (A/C Dual and Single Pressure F 1 Front Airbag Sensor LH
SW) F 2 Front Airbag Sensor RH
A 3 A/C Magnetic Clutch and Lock Sensor F 3 Front Clearance Light LH
A 4 ABS Actuator F 4 Front Clearance Light RH
A 5 ABS Actuator F 5 Front Side Marker LH
A 6 ABS Relay F 6 Front Side Marker RH
A 7 ABS Relay F 7 Front Turn Signal Light LH
A 8 ABS Speed Sensor Front LH F 8 Front Turn Signal Light RH
A 9 ABS Speed Sensor Front RH F 9 Front Wiper Motor
F 10 Fuse Box
B 2 Brake Fluid Level SW F 16 Fuse Box
F 18 Fuse Box
C 2 Cruise Control Actuator
C 17 Camshaft Position Sensor G 1 Generator (Alternator)
C 18 Crankshaft Position Sensor G 2 Generator (Alternator)
D 1 Data Link Connector 1 (Check Connector) H 1 Headlight Hi LH
D 2 Distributor H 2 Headlight Hi RH
H 3 Headlight Lo LH
E 1 EGR Gas Temp. Sensor H 4 Headlight Lo RH
E 2 Electronic Controlled Transmission Solenoid H 5 Horn LH
E 4 Engine Coolant Temp. Sensor (EFI Water Temp. H 6 Horn RH
Sensor) H 11 Heated Oxygen Sensor (Bank 1 Sensor 1)
E 5 Engine Coolant Temp. Sensor (Water Temp. Sensor) H 12 Heated Oxygen Sensor (Bank 2 Sensor 1)
(for Cooling Fan)

31
Position of Parts in Engine Compartment
[5S±FE]
H 1 Headlight Hi LH O 1 Oil Pressure SW
H 2 Headlight Hi RH O 2 Oxygen Sensor (Sub)
H 3 Headlight Lo LH O 3 Oxygen Sensor (Main)
H 4 Headlight Lo RH
H 5 Horn LH P 1 Park/Neutral Position SW (Neutral Start SW) (A/T)
H 6 Horn RH
R 1 Radiator Fan Motor
I 1 Idle Air Control Valve (ISC Valve)
I 2 Igniter S 3 Starter
I 3 Ignition Coil S 4Starter
I 4 Injector No. 1
I 5 Injector No. 2 T 1 Throttle Position Sensor
I 6 Injector No. 3
I 7 Injector No. 4 V 1 VSV (for A/C Idle±Up)
I 10 Intake Air Temp. Sensor (In±Air Temp. Sensor) V 2 VSV (for EGR System)
V 3 VSV (for Fuel Pressure Up)
K 1 Knock Sensor V 5 Vehicle Speed Sensor (Speed Sensor)
M 1 Manifold Absolute Pressure Sensor (Vacuum Sensor) W 1 Washer Motor
W 2 Water Temp. Sender
N 1 Noise Filter (for Ignition System)

52
POWER SOURCE (Current Flow Chart)
The chart below shows the route by which current flows from the battery to each electrical source (Fusible Link,
Circuit Breaker, Fuse, etc.) and other parts.
The next page and following pages show the parts to which each electrical source outputs current.
Starter Battery
FL MAIN 2.0L30A AM2Ignition SW
(AM2)
Headlight Relay
(Point Side)
40A DEFOG 100A ALTGenerator
(Alternator) 7.5A SRS
Taillight Relay
(Coil Side) 40A MAIN
(Canada) 7.5A OBD
7.5A ALT±S
10A HAZ
10A HORN
15A ECU±B
15A EFI
20A DOMEHeadlight Relay
(Coil Side)
60A ABS 15A STOP
40A HEATER
Taillight Relay
(Point Side)
Engine Main
Relay (Point Side)
15A TEL
Daytime Running
Light Relay No. 2
(Coil Side)
Daytime Running
Light Relay No. 2
(Point Side)Starter Relay
(Point Side)
(5S±FE)
30A POWER
40A AM1
Daytime Running
Light Relay (Main)
15A HEAD (UPR±LH)
15A HEAD (UPR±RH)
[LOCATION](1): J/B No. 1 (See page 20)(2): J/B No. 2 (See page 19)
(3): R/B No. 1 (See page 20)(7): R/B No. 7 (See page 19) 2022
25
27

57
E10 80
98
204 80
90
98
236 184
F376 144
148126
246252
Engine Control Module (Engine
and Electronic Controlled
Transmission ECU)
High Mount Stop Light
Heated Oxygen Sensor (Bank 2
Sensor 1) (1MZ±FE)
Idle Air Control Valve (ISC Valve)
Igniter
Ignition Coil
Injector No. 1
F4 F5 F6 F7 F8 F9 F15 G2 G3 G4 H1 H2 H3 H4 H5 H6 H7 H8 H9 H10 H11 H12 I1 I2 I3 I4 90
198144
148144
148144
14811 4
11 811 4
11 8126 126 104 106 104 106 104 106 104 106 173 17311 4
11 8
12680120
12480 8080
90
9868
8072
98
23672 80
Heated Oxygen Sensor (Bank 1
Sensor 1) (1MZ±FE) Heated Oxygen Sensor (Bank 1
Sensor 2) Air Vent Mode Control SW (for
Lever Control SW Type) Heater Control SW (for Push
Control SW Type) Hazard SW Horn RH
Horn LH Front Clearance Light LH
Front Clearance Light RH
Front Side Marker LH
Front Side Marker RH
Front turn Signal Light LH
Front turn Signal Light RH
Front Wiper Motor
Fuel Pump and Sender
Generator (Alternator)
Glove Box Light
Glove Box Light SW
Headlight Hi LH (USA)
Headlight Hi LH (CANADA)
Headlight Hi RH (USA)
Headlight Hi RH (CANADA)
Headlight Lo LH (USA)
Headlight Lo LH (CANADA)
Headlight Lo RH (USA)
Headlight Lo RH (CANADA)
(4): R/B No. 4 (See page 20)(5): R/B No. 5 (See page 19)(6)R/B No. 6 (See Page )
2526 26

61
186
R18 R19 R20 R21 S3 S8 S9 S10 V1 V2 V3 V468
72182226
23080
90
98
Rear Wiper Motor (W/G)
Rear Wiper Relay (W/G)
Remote Control Mirror LH
Remote Control Mirror RH
Shift Lock ECU
Stereo Component Amplifier
Stereo Component Amplifier
Stop Light SW
VSV (for A/C Idle±Up)
VSV (for EGR System) (1MZ±FE)
VSV (for Fuel Pressure Up)
VSV (for Intake Air Control)
(1MZ±FE)
Vehicle Speed Sensor
(Speed Sensor)
Vanity Light LH
Vanity Light RH
Washer Motor
Water Temp. Sender
Diode
Noise Filter
Defogger Relay (Coil Side)
Power Main Relay (Coil Side)
S5 V5 V8 V9 W1 W2
Starter (1MZ±FE)
Defogger Relay (Point Side)
Power Main Relay (Point Side)
Taillight Relay (Coil Side)
Taillight Relay (Point Side)
Starter Relay (Point Side)
Starter Relay (Coil Side)
EFI Main Relay (Coil Side)
EFI Main Relay (Point Side)
Headlight Relay (Coil Side)
186 154 154226
230120
192
204182
198
210
21480
9080
90
9880 80
98
198 90
192
236130
134
138130
134
138184
186236130
134
138190 190 190156
160
168156
160
16811 2
12612668
7268
72 80
90
98
198
204 80
90
98
198
204106
(4): R/B No. 4 (See page 20)(5): R/B No. 5 (See page 19)(6)R/B No. 6 (See Page )
2526 26

62
POWER SOURCE (Current Flow Chart)
*Page Nos. of
Related Systems
Parts
Code or
Location
CB or Fuse
Location
* These are the page numbers of the first page on which the related system is shown.
The part indicated is located somewhere in the system, not necessarily on the page indicated here.


106
Horn Relay
Headlight Relay (Point Side)
Radiator Fan Relay (Point Side)
Turn Signal Flasher
Heater Relay (Point Side)
Radiator Fan Relay No. 2
(Coil Side)
A/C Magnetic Clutch Relay
(Coil Side)
Daytime Running Light Relay No. 3
(Coil Side)
40A AM1
15A CIG/RADIO
40A DEFOG
15A ECU±1G
10A GAUGE
7.5A IGN
10A MIR±HTR
30A POWER
7.5A SRS
15A STOP
15A TAIL
7.5A TURN
20A WIPER
30A AM2
7.5A ALT±S
30A CDS FAN
20A DOME
15A ECU±B
15A EFI
10A HAZ
15A HEAD (LWR±LH)
15A HEAD (LWR±RH)
15A HEAD (UPR±LH)
15A HEAD (UPR±RH)
15A HEAD LH
15A HEAD RH
10A HORN
40A MAIN
7.5A OBD
10A STARTER
10A A/C
40A HEATER
7.5A DRL
100A ALT
60A ABS
Radiator Fan Relay (Coil Side)
Heater Relay (Coil Side)
Radiator Fan Relay No. 2
(Point Side)
Radiator Fan Relay No. 3
(Point Side)
A/C Magnetic Clutch Relay
(Point Side)
Circuit Opening Relay (Coil Side)
Circuit Opening Relay (Coil Side)
Daytime Running Light Relay No. 4
(Coil Side)
106 173 106 242 24211 4
11 8246 246 242 242 242 246 24680
90
9880
90
98
[LOCATION](1)
(4): J/B No. 1 (See page 20)
: R/B No. 4 (See page )(2)
(5): J/B No. 2 (See page 19)
: R/B No. 5 (See page )(3)
(6): R/B No. 1 (See page 23)
: R/B No. 6 (See page )
(7): R/B No. 7 (See page 20)(8): Fuse Box (F10, F17 See
on page 19) 20 2225
25
28 2926 26
27

64

POWER SOURCE
5 512
3 W
W
W
W
W±R
B±R
W±B
W±R
W W
R±LW B±R L
W B60A ABS
100A ALT
DAYTIME RUNNING
LIGHT RELAY NO. 2(
CA NADA)
(
USA)
B
2H2
EC1 6
B
(
CANADA)
5
RW±B
FL MAIN
2. 0L
B
BATTERY
1
B
GENERATOR
(
ALTERNATOR) G1W
W
E14 : 1MZ±FE
E23 : 5S±FE
(
5S±FE)
(
1MZ±FE)
B 1A 1
D 1
C 1 E 1
TO AB S
ACTUATOR W±L
(
1MZ±FE)
(
5S±FE)
B F1 0 , F10
AC,F16
E F17D ,F18
FUSE B OX
W
(
5S±FE)(
5S±FE)
4 40A
HEATER
4 4
3 W
EF1 3IP37EF14
I2
E6
E14 : 1MZ±FE
E20 : 5S±FE
E14 : 1MZ±FE
E15 : 5S±FE
WW
W
W
WW
W
2 40A
AM1
1G 91E 1
1
3A 15
3C 16
2E2
2H215A HEAD(
RH)
15A HEAD(
LH)
15A HEAD(
UPR±RH)
15A HEAD(
UPR±LH)
2F 15
2 TER RELAY
2C2C
25
1
2E1 2G1 10A HAZ
20A DOME
AM2
15A EFI
40A MAIN
HEADLIGHT
RELAY
4
23
1 10A HORN 7. 5A ALT±S15A TEL
30A CDS FAN30A RDI FAN
543
W
2B6
2B2W±B
W±B 2G6
B±R
2H 1
15A ECU±B
ENGINE
MAIN RELAY 21
7. 5A OBD
30A
STAR3
B

66
POWER SOURCE
TAILLIGHT RELAY5±3 : CLOSED WITH LIGHT CONTROL SW AT TAIL OR HEAD POSITION
CLOSED WITH ENGINE RUNNING AND PARKING BRAKE LEVER RELEASED (CANADA)
ENGINE MAIN RELAY4±5 : CLOSED WITH IGNITION SW AT ON OR ST POSITIONHEADLIGHT RELAY2±1 : CLOSED WITH LIGHT CONTROL SW AT HEAD POSITION OR DIMMER SW AT FLASH POSITION
CLOSED WITH ENGINE RUNNING AND PARKING BRAKE LEVER RELEASED (CANADA)
I12
IGNITION SW 4±3 : CLOSED WITH IGNITION KEY AT ACC OR ON POSITION
10±9, 4±2 : CLOSED WITH IGNITION KEY AT ON OR ST POSITION
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
F10A28F17E28 (1MZ±FE), 30 (5S±FE)I 233F10B30F18D28 (1MZ±FE), 30 (5S±FE)
F16C28 (1MZ±FE), 30 (5S±FE)G 128 (1MZ±FE), 30 (5S±FE)
: RELAY BLOCKS
CODESEE PAGERELAY BLOCKS (RELAY BLOCK LOCATION)
125R/B NO. 4 (LEFT KICK PANEL)
425R/B NO. 4 (RIGHT KICK PANEL)
526R/B NO. 5 (ENGINE COMPARTMENT LEFT)
727R/B NO. 7 (NEAR THE BATTERY)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1A
1C
1E20COWL WIRE AND J/B NO. 1 (INSTRUMENT PANEL LEFT)
1G
20COWL WIRE AND J/B NO. 1 (INSTRUMENT PANEL LEFT)
1M
2B22ENGINE ROOM MAIN WIRE AND J/B NO. 2 (ENGINE COMPARTMENT LEFT)
2C22ENGINE WIRE AND J/B NO. 2 (ENGINE COMPARTMENT LEFT)
2E22ENGINE ROOM MAIN WIRE AND J/B NO. 2 (ENGINE COMPARTMENT LEFT)
2F22COWL WIRE AND J/B NO 2 (ENGINE COMPARTMENT LEFT)2G22COWL WIRE AND J/B NO. 2 (ENGINE COMPARTMENT LEFT)
2H22ENGINE WIRE AND J/B NO. 2 (ENGINE COMPARTMENT LEFT)
3A24COWL WIRE AND J/B NO 3 (BEHIND COMBINATION METER)3C24COWL WIRE AND J/B NO. 3 (BEHIND COMBINATION METER)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
EB138 (1MZ±FE)ENGINE ROOM MAIN WIRE AND RELAY WIREEB140 (5S±FE)ENGINE ROOM MAIN WIRE AND RELAY WIRE
EC138 (1MZ±FE)ENGINE WIRE AND ENGINE ROOM MAIN WIREEC140 (5S±FE)ENGINE WIRE AND ENGINE ROOM MAIN WIRE
EF138 (1MZ±FE)EF140 (5S±FE)ENGINE WIRE AND COWL WIREIP144
ENGINE WIRE AND COWL WIRE
IP344
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
EB38 (1MZ±FE)FRONT LEFT FENDEREB40 (5S±FE)FRONT LEFT FENDER
IG42INSTRUMENT PANEL BRACE LH
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
E638 (1MZ±FE)E1438 (1MZ±FE)E 640 (5S±FE)ENGINE ROOM MAIN WIREE15ENGINE WIRE
E738 (1MZ±FE)ENGINE ROOM MAIN WIREE2040 (5S±FE)ENGINE WIRE
E 740 (5S±FE)E23
40 (5S FE)
E1038 (1MZ±FE)ENGINE WIREI 244COWL WIRE
SERVICE HINTS

88
ENGINE CONTROL (5S±FE)
THIS SYSTEM UTILIZES AN ENGINE CONTROL MODULE (ENGINE ECU (M/T), ENGINE AND ELECTRONIC CONTROLLED
TRANSMISSION ECU (A/T)) 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. (WATER TEMP.) SIGNAL SYSTEM
THE ENGINE COOLANT TEMP. SENSOR (EFI WATER TEMP. SENSOR) DETECTS THE ENGINE COOLANT TEMP. AND HAS A
BUILT±IN THERMISTOR WITH A RESISTANCE WHICH VARIES ACCORDING TO THE ENGINE COOLANT TEMP. (WATER TEMP.)
THUS THE ENGINE COOLANT TEMP. (WATER TEMP.) IS INPUT IN THE FORM OF A CONTROL SIGNAL TO TERMINAL THW OF
THE ENGINE CONTROL MODULE (ECU).
(2) INTAKE AIR TEMP. SIGNAL SYSTEM
THE INTAKE AIR TEMP. SENSOR (IN±AIR TEMP. SENSOR) IS DETECTS THE INTAKE AIR TEMP., WHICH IS INPUT AS A
CONTROL SIGNAL TO TERMINAL THA OF THE ENGINE CONTROL MODULE (ECU).
(3) OXYGEN SENSOR SIGNAL SYSTEM
THE OXYGEN DENSITY IN THE EXHAUST GASES IS DETECTED AND INPUT AS A CONTROL SIGNAL TO TERMINAL OX1 AND
OX2 OF THE ENGINE CONTROL MODULE (ECU).
(4) RPM SIGNAL SYSTEM
CRANKSHAFT POSITION AND ENGINE RPM ARE DETECTED BY THE PICK±UP COIL INSTALLED INSIDE THE DISTRIBUTOR.
CRANKSHAFT POSITION IS INPUT AS A CONTROL SIGNAL TO TERMINALS G+ AND G2 (CALIFORNIA), OF THE ENGINE
CONTROL MODULE (ECU), AND RPM IS INPUT TO TERMINAL NE+.
(5) THROTTLE SIGNAL SYSTEM
THE THROTTLE POSITION SENSOR DETECTS THE THROTTLE VALVE OPENING ANGLE, WHICH IS INPUT AS A CONTROL
SIGNAL TO TERMINAL VTA OF THE ENGINE CONTROL MODULE (ECU), OR WHEN THE VALVE IS FULLY CLOSED, TO
TERMINAL IDL
(6) VEHICLE SPEED SIGNAL SYSTEM
THE VEHICLE SPEED SENSOR (SPEED SENSOR), INSTALLED INSIDE THE COMBINATION METER, DETECTS THE VEHICLE
SPEED AND INPUTS A CONTROL SIGNAL TO TERMINAL SPD OF THE ENGINE CONTROL MODULE (ECU).
(7) PARK/NEUTRAL POSITION SW (NEUTRAL START SW) SIGNAL SYSTEM (A/T)
THE PARK/NEUTRAL POSITION SW (NEUTRAL START SW) DETECTS WHETHER THE SHIFT POSITION ARE IN NEUTRAL AND
PARKING OR NOT, AND INPUTS A CONTROL SIGNAL TO TERMINAL NSW OF THE ENGINE CONTROL MODULE (ECU).
(8) A/C SW SIGNAL SYSTEM
THE A/C AMPLIFIER INPUTS THE A/C OPERATIONS TO TARMINAL ACA OF THE ENGINE CONTROL MODULE (ECU) AS A
CONTROL SIGNAL.
(9) BATTERY SIGNAL CIRCUIT
VOLTAGE IS CONSTANTLY APPLIED TO TERMINAL BATT OF THE ENGINE CONTROL MODULE (ECU). WHEN THE IGNITION SW
TURNED ON, THE VOLTAGE FOR ENGINE CONTROL MODULE (ECU) START±UP POWER SUPPLY IS APPLIED TO TERMINALS
+B AND +B1 OF ENGINE CONTROL MODULE (ECU) VIA EFI MAIN RELAY. THE CURRENT FLOWING THROUGH THE IGN FUSE
FLOWS TO TERMINAL IGSW OF THE ENGINE CONTROL MODULE (ECU).
(10) INTAKE AIR VOLUME SIGNAL SYSTEM
INTAKE AIR VOLUME IS DETECTED BY THE MANIFOLD ABSOLUTE PRESSURE SENSOR (VACUUM SENSOR) (FOR MANIFOLD
PRESSURE) AND IS INPUT AS A CONTROL SIGNAL TO TERMINAL PIM OF THE ENGINE CONTROL MODULE (ECU).
(11) STA 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 STA OF THE ENGINE CONTROL MODULE (ECU) AS A CONTROL
SIGNAL.
(12) ENGINE KNOCK SIGNAL CIRCUIT
ENGINE KNOCKING IS DETECTED BY KNOCK SENSOR AND THE SIGNAL IS INPUT INTO TERMINAL KNK AS A CONTROL
SIGNAL.
(13) ELECTRICAL LOAD SIGNAL SYSTEM
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.
SYSTEM OUTLINE