distributor 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)

30
ELECTRICAL WIRING ROUTING
Position of Parts in Engine Compartment
[5S±FE]
A 1 A/C Condenser Fan Motor E 1 EGR Gas Temp. Sensor
A 2 A/C Triple Pressure SW (A/C Dual and Single Pressure E 2 Electronic Controlled Transmission Solenoid
SW) E 3 Electronic Controlled Transmission Solenoid
A 3 A/C Magnetic Clutch and Lock Sensor E 4 Engine Coolant Temp. Sensor (EFI Water Temp.
A 4 ABS Actuator Sensor)
A 5 ABS Actuator E 5 Water Temp. SW (for Cooling Fan)
A 6 ABS Relay
A 7 ABS Relay F 1 Front Airbag Sensor LH
A 8 ABS Speed Sensor Front LH F 2 Front Airbag Sensor RH
A 9 ABS Speed Sensor Front RH F 3 Front Clearance Light LH
F 4 Front Clearance Light RH
B 1 Back±Up Light SW (M/T) F 5 Front Side Marker LH
B 2 Brake Fluid Level SW F 6 Front Side Marker RH
F 7 Front Turn Signal Light LH
C 2 Cruise Control Actuator F 8 Front Turn Signal Light RH
F 9 Front Wiper Motor
D 1 Data Link Connector 1 (Check Connector) F 10 Fuse Box
D 2 Distributor F 16 Fuse Box
F 17 Fuse Box
F 18 Fuse Box
G 1 Generator (Alternator)
G 2 Generator (Alternator)

73
*
2 : EX. CALIFORNIA * 1 : CALIFORNIA
* 3 : ONE BODY ASSEMBLY EX. CALIFORNIA
A 1A2A4A3
B 1B4B3
B 4B5B18 B13 B3B22 A 4A18 A17 A3A20
ECIP1 16
E20
E1 9
IP1 8
W±R W±R W±R
B±R
W±R B B
BW W±R L L B
Y R BR
W±R W±R
B
DATA LINK
CONNECTOR 1
(
CHECK CONNECTOR) D1 IGNITER I2 IGNITION COIL I3 TO NOISE FILER
(
FOR IGNITION SYSTEM)
TO TACHOMETER
[COMB. METER] B±O
NE+ G+ G± NE± IGF IGT IG±+B C±
IG± NE G1 G± G2 NE± IGF IGT12 4 53
19 B 2 (
*1)
(
*
2)
(
*2, M/T) (
*1, A/T)
A 5
L
(
*1, A/T)
(
*
2, M/T)
(
SHIELDED)
B E7 ,E11AB D2 ,D2A
ENGINE CONTROL MODULE(
ENGINE AND
ELECTRONIC CONTROLLED TRANSMISSION
ECU)DISTRIBUTOR(
*1)(
*2)
E16W±R
NE G1 G± G2
(
*
2) (
*
1) (
*3)1
2
1A 61G 8

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

91
*
2 : EX. CALIFORNIA
* 4 : FOR CANADA IN TMM MADE * 1 : CALIFORNIA
* 5 : EX. * 4
B C
I18B 11 B 1B12
R
B
L R
VC VTA IDL
THROTTLE POSITION
SENSOR T11 2
1 2
1 2 E20
E20
E18 E17 E17 1234
2 3
32 112
A 13 A2C 18 C 17 C 5 C 4
B 2 A
4B3B10 B16 B9 PIM THW THA THG E21 E2 NE NE±(
*2)
G± G+B B± O W±R W±R
B±O
B± O
BR BR BR
B±Y
BR BR
BR
BR
BR
BRGR L±BLGB±R G G
W± R W±R
R
L
B
Y
B±O
D6
I3
D2
E7 ,E8 , E10 +B1 ELSW± R
NE+ NE± G± G+(
*2)
VC E2PIM
(
*2)
M1
E4
I10
E1
MANIFOLD ABSOLUTE
PRESSURE SENSOR
(
VACUUM SENSOR)
ENGINE COOLANT TEMP. SENSOR
(
EFI WATER TEMP. SENSOR)
INTAKE AIR TEMP. SENSOR
(
IN±AIR TEMP. SENSOR)
EGR GAS TEMP.
SENSOR
ENGINE CONTROL MODULE(
ENGINE AND ELECTRONIC CONTROLLED TRANSMISSION ECU)(
A/T)
B
DIODE
(
FOR IDLE±UP)
IGNITION COIL
DISTRIBUTOR FROM
I18 E18
4321BR
BR I18
L
L FROM CRUISE
CONTROL ECU 1
P
E19
C 3C20 534
12
W± R
WBW±R
B
W±R
(
SHIELDED)
IGF IGT COIL± +B IG±
IGF IGTIGNITER I2
TO TACHOMETER
[COMB. METER]
C 8
FPU 1 2 B±O
(
*1)
B±O
(
*1) B±RV3
VSV
(
FOR PRESSURE UP)
1342G2(
*1)
(
*1)
(
*2)
NE G2 G± G1(
*1)
B E11 , E12CA,E14ENGINE CONTROL MODULE(
ENGINE ECU)(
M/T) ONE BODY ASSEMBLY
EX. CALIFORNIA
R
BRB±R
1D 1415A
TAIL
1A 1010A
MIR±HTR
3C 53D 5
POWER SOURCESYSTEM(
SEE PAGE 64)

99
AB
1 2
1 2
1 2 E20
E20
E18 E17 E171234
32 112
C 1A 5 A 18 A 17 A 4
B 2C
4B3B13 B9 B 16 IP116
PIM THW THA THG E2E21 NE NE± G± G+
(
SHIELDED) B B±O W±R W± R
B±O
B±O
R
BRBR BR BR BR
B±Y
BR
BR
BR
BR
BRGR L±BLGW±R W±R
R
L
B
Y
B±O
D6
I3
D2
E11 , E12 , E14 +B1W±R
NE+ NE± G± G+
VC E2PIM
M1
E4
I10
E1
MANIFOLD ABSOLUTE
PRESSURE SENSOR
(
VACUUM SENSOR)
ENGINE COOLANT
TEMP. SENSOR
(
EFI WATER TEMP.
SENSOR)
INTAKE AIR
TEM P. SE NSOR
(
IN±AIR TEMP.
SENSOR)
EGR GAS TEMP.
SENSOR
ENGINE CONTROL MODULE(
ENGINE ECU)
B
DIODE
(
FOR IDLE±UP)
IGNITION COIL
DISTRIBUTOR
I18 E18
BR
BRBR 2 3
C 12
B±R G G
ELS FRO E 64)
1
P
E19
A 3A22
W±R
WB±R
W±R
BB
B
W± R
B± R
12 534
COIL± +B
IG F IGT
IG F IGTIGNITER I2
TO
TACHOMETER
[COMB. METER]
W±R
(
*
2)B±O
B±O
NE+
1D 1415A
TAIL
1A 1010A
MIR±HTR
3C 53D 5
M POWER SOURCE SYSTEM(
SEE PAG

5
678
4CAMRY(
C ont' d)
2 1
1 21G 6
3D 5
1E 53C5 1A 14 11IP1
12 IP3
11C 12C 13C 1C 22C 2C 21C 10C 9C 4C
5C 24A10 A 9 A 7 A 8 A16 B
8B 14B 15B 7B6B
19 I P3 1 IP1 13 IP3 15 IP12 3 12
3A 20A
EC 916 8 7215 1 21712 8 9 13 15 4 12 1
2 1
2 1
1234321
4B 3B 10B 9B 2B 1B 11B 12B
13 B 5 B 14 A 4 A 5 A 17 A 18 A 13 A 26 A
ED EC1
2 1 B±W
W±G
B±O B±O B±O
G±R
B±O
B±O
B±O
B±O B±O B±W
B± O
B± O
G± Y
G±R
LG
B±R
W± L
B±W
B±WW± G
B±W
G G B±R
LG±B
B± Y
V± Y
G± W
W±R
W
BR R± W
G± W
GR
BR± BR±B G±R
G±R
R±W
G± W
Y±G
BR± B
L±B
B±O
G±R
BR±B
GR
G± W
R±W
R± L
W BR
R±G
WW
R± L
BR
WR± L
BR
W BR
G±R
G±R
G±R
L±B
W
Y
R
L
B
Y
W± B
W± B W± B
W± B
R±L OX1 OX2 E1 KNKNE
NE +G2
NE±G±
G±(
*1)
(
*2)E01 E02
TSE2 PIM VC
IDL VTA VC PIM E2 THG THA THW E2 1 IGT IGF B/K SPD ACA ACT ELS NS W BATT FPU ISCV ISCC ISCO +B1 +B STA
OX 1 OX2 VF1 TE2 TE1 TT W B FP TT TE1 TE2 ENG W
ECT W#40VFTE2TE1TT
LG
L±B
GR
BR
B± Y
B
L BR
RBR
BR
BR
BRBR BR BR BR
I1
IDLE AIR CONTROL
VALVE(
I SC VAL VE)
V1
VSV
(
for A/C Idle±Up)
V3
VSV(
for Fuel Press ure Up)
(
*4)
(
*3)
D6
DIODE
(
f or I dle±Up)
Fr om Ignit er
<2±3>From Stop Light
SW< 8±2> < 9±2> To Combinat ion Met er
< 33±2> To A/C Amplifier
<35±4><36±5> To A/C Amplifier
<35±4><36±5>From º TAILº
Fuse<16±2><17±2>
E4
ENGI NE COOL ANT TEMP. SENSOR
(
EF I WATER TEMP. SENSOR)
I10
I NTAKE AIR TEMP. SENSOR
(
IN±AIR TEMP. SENSOR)
E1
EGR GAS TEMP. SENSOR
M1
MANIFOLD ABSOLUTE
PRESSURE SENSOR
(
VACUUM SENSOR)T1
THROTTL E
POSITION SENSOR
Intake
manif old LH K1
KNOCK
SENSORFrom Distributor
< 2±3>
O2
OXYGEN SENSOR
(
Sub) O3
OXYGEN SENSOR
(
Main) Fr om Ignit er
<2±3>To O/D Ma i n
SW< 7 ±5 >
D1
DA TA LI NK CONNECTOR 1
(
CHECK CONNECTOR) D3
DATA LINK CONNECTOR 2(
TDCL)12345 7 891011
12
14 15 16 17 1822 6
19 20 21 13CDARKGRAY ENGI NE CONT ROL MODULE(
ENGINE AND
EL ECTRONI C CONTROLL ED TRANSMI SSI ON ECU)
DARK GRAY
DA RK GRA Y A
B
B±O
(
SHI ELDED)
(
SHI EL DED)
E2
VC
VTA
IDL
1234 67891011
14 15
16 17 1824 512
25 26
20 19 21 22 2313 12345678
16 15 14 13 12 11 10 9
Intake manifold RH 19BIG±
4
Y± BTC
To Cr ui se
Control ECU< 24±2>
To Cen ter
Airbag Sens or
Assembly< 23±4>
To ABS ECU
< 25±3> < 26±3>From SRS
Warning Light
[COMB. METER]
< 23±4>
Intake manifold
RH11
LG±RTC
5
B±YAB
14
G±BABSFrom ABS ECU
< 25±2> < 26±3> To Center
Airbag Sens or
Ass embly< 23±4>
To ABS ECU
<25±2><26±3>
3
G±R(
*3)
(
*4)
3B 43C 191A 151M 6G±W G±W
19 IP1
EDIP3163D 123D 3E1
W±B W±B
W± B
Intake
ma n i f o l d L H3
AB
12
B± Y From SRS
Warning Light
[COMB. METER]
< 23±4>
A/D
10G± L Fro m Crui s e
Cou t r o l E CU
< 24±3>
1P
From º MIR±HTRº
Fuse<24±4><28±1>
(
SHIELDED)
(
SHIELDED) C 14FC
G±R
A 12#10W
A 11#20Y
A 25#30R±L
(
*1) (
*1)
(
*2) V2
VSV(
for EGR System)
2
1G23 A
EGR B±O
B±O
(
*1)(
*1)
Engine Control(
5S±FE A/T and California M/T)
*4: Ex.
*3 *3: forCanadainTMMMade
R± L(
*1)
R±B(
*1)ENGINE CONTROL MODULE(
ENGI NE ECU)(
M/ T)
E1 1 A , E12 B , E1 4 C(
A/ T)
E7
(
M/T)
E12(
A/ T)
E1 0
G1
G+ (
Ex. California M/T)
(
M/T)
E11 A DARK GRAY(
A/T)
E8 B DARKGRAY
(
M/T)
E14 C DARK GRAY
A E7 , E8 B , E10 C ENGINECONTROL MODULE(
ENGI NE AND E LE CT RONI C CONTROL LE D TRANS MI SS I ON E CU)(
A/T)
(
A/T) (
A/ T)
(
A/T)To Cru i se
Co nt r ol ECU
< 24±2>L
L
R
3E1
G± O
To ABS ECU
<25±3><26±3>
*1 : California
*2 : Ex. Califor nia