1994 TOYOTA CAMRY relay

65
E7 E6
21
7521
12 1E4
1E2
1G10
1G3
1G8 4
103
2
7
9 AM2 AM1ACC
IG1
ST1
IG2
ST2
EB IG 5
5 11M1
1C10 W
W
W
W±R
W±B
B±R
WB±R
B±R
WW
W
WW±B W
W
P±L
B±Y
B±O B±W
W
W±B
W±B
15A STOP
7. 5A SRS
15A TAIL
TAILLIGHT
RE LA Y
POWER MAIN
RELAY
DEFOGGER
RE LA Y
15A CIG/RADIO
15A ECU±IG
20A WIPER
10A GAUGE
7. 5A TURN
15A HEAD(
LW R±RH)
15A HEAD(
LWR±LH)
7. 5A DRL B±R
TO STARTER
3412 53
12
53
53
W±B
IGNITION SW I12
7 5R±W
R
W±R 1A7
EB11TO DOOR LOCK
CONTROL RELAY
10A MIR HTR
7. 5A IGN
10A STARTER
54 B±R
IP1172130A POWER
1240A DEFOG
E10 : 1MZ±FE
E20 : 5S±FE

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

68
STARTING AND IGNITION (1MZ±FE)
A
AM1
AM2 104
7
9 ACC
IG1
ST1
IG2
ST2
EF1 3EF1 1 1 2G 1
1
2H 2
IG M
B 1
B1
B±RB±R
B±R B±O B±WB±O
B
BWW
W±RW
B±R B±R
W±B
B
B±W B
W±B W±B
B±W
IGNITION SW
52 31
B±W 100A ALT
FUSE BOX
30A
AM210A
STARTER
STARTER
RELAY
PARK/NEUTRAL POSITION SW
(
NE UTRA L START SW)
STARTER BATTERY FL MAIN
2. 0L
S3 , S4 I12
P1
AP
N5
6
B
A 1
B 1
B F10 , F16A
E10 17 2C52F12C2
TO CIRCUIT OPENING
RELAY TO ENGINE CO NTROL
MODULE(
ENGINE AND
ELECTRONIC CONTROLLED
TRANSMISSION ECU)B±W
B±W
5
4 40A
MAIN
IP1
B±W
1E 51G 6
1C 113C 6
1M 13C 18
3C 2
3D 2 3B 20
1G 9
1E 140A
AM1 2
1

70
STARTING AND IGNITION (1MZ±FE)
I12 IGNITION SW
4±7 : CLOSED WITH IGNITION SW AT ST POSITION
10±9 : CLOSED WITH IGNITION SW AT ON OR ST POSITION
STARTER RELAY
(6) 2± (6) 4 : CLOSED WITH CLUTCH START SW ON AND IGNITION SW AT ST POSITION (M/T)
CLOSED WITH IGNITION SW AT ST POSITION (A/T)
STARTER
POINTS CLOSED WITH CLUTCH START SW ON AND IGNITION SW AT ST POSITION
P 1 PARK/NEUTRAL POSITION SW (NEUTRAL START SW) (A/T)
2±3 : CLOSED WITH A/T SHIFT LEVER IN P OR N POSITION
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
D 128I15B29I2129
E 732I1629J 733
F10A28I1729P 129
F16B28I1829S 3A29
I 2A29I1929S 4B29
I1233I2029
: RELAY BLOCKS
CODESEE PAGERELAY BLOCKS (RELAY BLOCK LOCATION)
125R/B NO. 1 (LEFT KICK PANEL)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1C
1E20COWL WIRE AND J/B NO 1 (INSTRUMENT PANEL LEFT)1G20COWL WIRE AND J/B NO. 1 (INSTRUMENT PANEL LEFT)
1M
2C22ENGINE 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)
2F22COWL WIRE AND J/B NO. 2 (ENGINE COMPARTMENT LEFT)
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)
EF138 (1MZ±FE)EF140 (5S±FE)ENGINE WIRE AND COWL WIRE
IP144
ENGINE WIRE AND COWL WIRE
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
EC38 (1MZ±FE)INTAKE MANIFOLD RHEC40 (5S±FE)INTAKE MANIFOLD RH
ED38 (1MZ±FE)INTAKE MANIFOLD LHED40 (5S±FE)INTAKE MANIFOLD LH
IG42INSTRUMENT PANEL BRACE LH
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
E1038 (1MZ FE)ENGINE WIREE1338 (1MZ FE)ENGINE WIREE1238 (1MZ±FE)ENGINE WIREE1438 (1MZ±FE)ENGINE WIRE
SERVICE HINTS

72
STARTING AND IGNITION (5S±FE)
4
107
9 AM2 AM1ACC
IG1
ST1
IG2
ST2
30A
AM210A
STARTER 40A
MAIN
A 1
B 12C 52F12C2 1
1 2H 22G 1
B1A 1
IG EF1 1EF1 1
M 52 31
2 1
E20 EF1 3B±O
B±W
B±O
B±R
BB±W
W±RW
B±WB W
B±W B±W
B W±BB±R
B
B
B±W B±W
B± R(
M/T)
(
M/T)
(
A/T)
(
A/T)
(
M/T)
(
A/T) W±B
4 5
P
N
65
W
B B
W±BB±R
W±B
B±R
PARK/NEUTRAL POSITION SW
(
NE UTRA L START SW)
(
A/T) P1CLUTCH START
SW(
M/T) C7
STARTER
RELAY IGNITION SW I12
FL MAIN
2. 0L
BATTERY
TO CIRCUIT OPENING
RELAY TO ENGINE CONTROL
MODULE(
ENGINE AND
ELE CTRONIC CO NTROLLED
TRANSMISSION
ECU(
A/T)
,
ENGINE ECU(
M/T))
B S3 ,S4A
B F10 , F16A
STARTER
FUSE BOX100A ALT
IP 1 17
1G 6
1E 5
140A
AM1
1E 11G 9
2
3B 20 3D23C 2
3C 18
1M 13C 6
1C 11

74
STARTING AND IGNITION (5S±FE)
I12 IGNITION SW
4±7 : CLOSED WITH IGNITION SW AT ST POSITION
10±9 : CLOSED WITH IGNITION SW AT ON OR ST POSITION
C 7 CLUTCH START SW (M/T)
1±2 : CLOSED WITH CLUTCH PEDAL FULLY DEPRESSED
STARTER RELAY
(6) 2± (6) 4 : CLOSED WITH CLUTCH START SW ON AND IGNITION SW AT ST POSITION (M/T)
CLOSED WITH IGNITION SW AT ST POSITION (A/T)
STARTER
POINTS CLOSED WITH CLUTCH START SW ON AND IGNITION SW AT ST POSITION
P 1 PARK/NEUTRAL POSITION SW (NEUTRAL START SW) (A/T)
2±3 : CLOSED WITH A/T SHIFT LEVER IN P OR N POSITION
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
C 732E11B32I1233
D 130F10A30P 131
D2A30F16B30S 3A31D 2B30I 231S 4B31
E 7A32I 331
: RELAY BLOCKS
CODESEE PAGERELAY BLOCKS (RELAY BLOCK LOCATION)
125R/B NO. 1 (LEFT KICK PANEL)
: 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
2C22ENGINE 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)
3B
3C24COWL WIRE AND J/B NO. 3 (BEHIND COMBINATION METER)
3D
24COWL 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)
EF138 (1MZ±FE)EF140 (5S±FE)ENGINE WIRE AND COWL WIRE
IP144
ENGINE WIRE AND COWL WIRE
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
EC38 (1MZ±FE)INTAKE MANIFOLD RHEC40 (5S±FE)INTAKE MANIFOLD RH
IG42INSTRUMENT PANEL BRACE LH
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
E1640 (5S FE)ENGINE WIREE2040 (5S±FE)ENGINE WIRE
E1940 (5S±FE)ENGINE WIRE
SERVICE HINTS

76
CHARGING
A
IG L S B
IC RE GULATOR2C 6
B 2B1B3 8
E9
E
IP3 10 IP 3 2GE 64)
A 1 7. 5A
ALT±S
R±LY
W
R±L
YB±O
W B
W
W
GENERATOR
(
ALTERNATOR)
BATTERY FL MAIN
2. 0L
100A ALT
CHARGE WARNING LIGHT
[COMB. METER]
JUNCTION
CONNECTOR
Y
J1
G1 , G2
C9
B FUSE BOX
FROM DAYTIME RUNNING
LIGHT RELAY(
MAIN)
Y E
(
CANADA)
R±L R±L
TO BA CK± UP SW(
M/T)
TO PARK/NEUTRAL POSITION
SW(
NEUTRAL START SW)(
A/T)
TO VEHICLE SPEED SENSOR
(
SPEED SENSOR) B 1A 1
C 1(
1MZ±FE)
(
5S±FE)
B F10 , F10AC,F16
I18
1D 61D37. 5A
IGN 10A
GAUGE
FROM POWER SOURCE SYSTEM(
SEE PA

78
ENGINE CONTROL (1MZ±FE)
THIS SYSTEM UTILIZES AN ENGINE CONTROL MODULE (ENGINE AND ELECTRONIC CONTROLLED TRANSMISSION ECU) 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 CIRCUIT
THE ENGINE COOLANT TEMP. SENSOR (WATER TEMP. SENSOR) DETECTS THE ENGINE COOLANT TEMP. AND HAS A
BUILT±IN THERMISTOR WITH A RESISTANCE WHICH VARIES ACCORDING TO THE WATER TEMP. IS INPUT INTO TERMINAL
THW OF ENGINE CONTROL MODULE (ECU) AS A CONTROL SIGNAL.
(2) INTAKE AIR TEMP. SIGNAL CIRCUIT
THE INTAKE AIR TEMP. SENSOR IS INSTALLED IN THE MASS AIR FLOW (AIR FLOW METER) AND DETECTS THE INTAKE AIR
TEMP., WHICH IS INPUT AS A CONTROL SIGNAL TO TERMINAL THA OF 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 OXL, OXR
AND OXS OF THE ENGINE CONTROL MODULE (ECU). TO MAINTAIN STABLE DETECTION PERFORMANCE BY THE OXYGEN
SENSOR, A HEATER IS USED FOR WARMING THE SENSOR. THE HEATER IS ALSO CONTROLLED BY THE ENGINE CONTROL
MODULE (ECU) (HTL, HTR AND HTS).
(4) RPM SIGNAL SYSTEM
CAMSHAFT POSITION AND CRANKSHAFT POSITION ARE DETECTED BY THE CAMSHAFT POSITION SENSOR AND
CRANKSHAFT POSITION SENSOR. CRANKSHAFT POSITION IS INPUT AS A CONTROL SIGNAL TO TERMINAL G22+ OF THE
ENGINE CONTROL MODULE (ECU), AND ENGINE RPM IS INPUT TO TERMINAL NE+.
(5) THROTTLE SIGNAL CIRCUIT
THE THROTTLE POSITION SENSOR DETECTS THE THROTTLE VALVE OPENING ANGLE AS A CONTROL SIGNAL, WHICH IS
INPUT INTO TERMINAL VTA OF THE ENGINE CONTROL MODULE (ECU). WHEN THE VALVE IS COMPLETELY CLOSED, THE
CONTROL SIGNAL IS INPUT INTO 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 SP1 OF THE ENGINE CONTROL MODULE (ECU).
(7) PARK/NEUTRAL POSITION SW (NEUTRAL START SW) SIGNAL SYSTEM
THE PARK/NEUTRAL POSITION SW (NEUTRAL START SW) DETECTS WHETHER THE SHIFT POSITION IS IN NEUTRAL OR
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 TEMRINAL A/C 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, 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.
(10) INTAKE AIR VOLUME SIGNAL CIRCUIT
INTAKE AIR VOLUME IS DETECTED BY THE MASS AIR FLOW (AIR FLOW METER) AND THE SIGNAL IS INPUT TO TERMINAL VG
OF THE ENGINE CONTROL MODULE (ECU). AS A CONTROL SIGNAL.
(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 THE KNOCK SENSOR NO. 1 AND NO. 2 AND THE SIGNALS ARE INPUT INTO TERMINALS
KNKR AND KNKL AS A CONTROL SIGNAL.
SYSTEM OUTLINE