1994 TOYOTA CAMRY Battery

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

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

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

80
ENGINE CONTROL (1MZ±FE)
AM1
AM2 104
7
9 ST1
IG2
2G 1
IG 1 2
1 2
1 2
1 2
1 2
1 2 I20
E12 I18 E12 I18
BX1 4IJ1 16 EF1 3IP1 9IP1 16
IP3 15 66
666 641 32 2H 2
L±B
G±R
Y
R
L
GR
G
W B±OL±B B±W
B±WB±O
B±O B±O B±O
BB±O
BWW
BW
W±R
B±O
B±O B±O B±O
B±O
B±O
B±O
B±O
B±O Y RL GRG W
W±B W±B W±B
L±B L±BG±R
L±BB± O
B±W
B±W
BATTERY FL MAIN
2. 0LI18
B±O B±O 100A ALT
10A
STARTER
30A
AM2
FUSE BOX
IGNITION SW
CIRCUIT
OPENING
RELAY
INJECTOR NO. 1
INJECTOR NO. 6
INJECTOR NO. 3
INJECTOR NO. 4
INJECTOR NO. 5
INJECTOR NO. 2 I4
I9
I6
I7
I8
I5
I12
L±B
A 1
B 1B F10 , F16A
FROM POWER SOURCE
SYSTEM(
SEE PAGE 64)
1 B±O
B±W B±W
B±O
IP14
B±O 4
1G 9
1E 140A
AM1 2
1
1G 8
1A 67. 5A
IGN 1D 9
3B 20
3D 23C 2
3A 13
1C 113C 18
1M 1

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

104
HEADLIGHT (FOR USA)
3
4
13 14 12
11 9 OFF
TAIL
HEAD
LOW
HIGH
FLASH
LIGHT
CO NTRO L
SW DIMMER SW
COMBINATION SW
R±B
I5E4
IE I52 1
2 1
2 1
2 1
14 13
E4E3
EB I2 ED18 W
R±B
R±Y R±Y
R±Y
R
R W±BR±B R±B
W±B R±B
R±B
W±B W±B
W±B W±BR±B
R±B R±YB
R±B ED1 5R±Y
R±Y INTEGRATION RELAYBATTERY
FL M AI N
2. 0L
HIGH BEAM INDICATOR
LIGHT [COMB. METER]
HEADLIGHT HI RH
HEADLIGHT LO RH
HEADLIGHT HI LH
HEADLIGHT LO LH
C12
I13
C9
H2
H4
H1
H3
2G 72E1HE ADLIGHT
RE LAY
31 42
40A
MAIN
2H 2
15A
HE AD
(
RH)15A
HEAD
(
LH)
2A 2A 15 2E 2
2A 22A6

106
HEADLIGHT (FOR CANADA)
13
11 9 OFF
TA I L
HE AD
LOW
HIGH
FL AS H
LIGHT
CONTROL
SW DIMME R SW
COMBINATION SW
I5I7 I7
EF1 4
IE12 214 5 15
16 4
13
2W
B
W
R±B
G±R
R±B B
R±B
L±Y L±Y R±BG R±Y W±B
W±B W±B
R±YB B
BW W
INTEGRATION RELAY
DAYTIME RUNNING LIGHT RELAY
(
MAIN) FL MA IN
2. 0L
BATTERY
100A ALT
I13
D4 C12
FUSE BOX
I5
W±B
B 1A 1
C 2G±R
W±B W±B (
1MZ±FE)
(
5S±FE)B F10 , F10AC,F16
3A 93B 11
2G 72E1
2G 3
R±B
W
15A
ECU±B HEADLIGHT
RELAY 2H2
31 42
40A
MAIN