1994 TOYOTA CAMRY engine

237
*
1 : W/O A/T INDICATOR LIGHT
* 2 : W/ A/T INDICATOR LIGHT
*
3 : MALFUNCTION INDICATOR LAMP
(
CHECK ENGINE WARNING LIGHT)
*7 : 5S±FE *
6 : 1MZ±FE * 5 : TMM MADE
*
4:TMCMADE
AB
C
COMBINATION METER1
IEIF 2 1B 15 B3B9B13
B 12B 8B14 C 1 C 3 A 9A 10C 2
II1 4
11B DE 18 A
FB E D
8 A
FAFROM POWER SOURCE SYSTEM(
SEE PAGE 64)
B±W
R±Y
R±GW±R Y±G B±W
B±O G± L
G±R
R±Y R±Y W±BG±RG± L
±B W±B
R±W R±W
R±W
G±O
Y
B±Y
R±BB±YY G±O R±Y
R±Y
R±W 10A
STARTER
TO LIGHT FAILURE
SENSOR
FROM º HEAD RHº FUSE
FROM º HEAD(
UP R±RH)
ºFUSE
(
CA NADA) (
USA) CRUISE
(
*3)
BRAKE
BULB
CHECK
RE AR LIGHT
O/D OFF
CHARGE
SRS
HIGH BEAM
PKB BRK
TOO/DMAINSW
TO GENERATOR(
ALTERNATOR)
TO CENTER AIRBAG
SENSOR ASSEMBLY
TO DIMMER SW
[COMB. SW] TO CRUISE CONTROL ECU
TO E NGINE CONTROL MODULE
(
ENGINE AND ELECTRONIC CONTROLLED
TRANSMISSION ECU)(
A/T)
TO E NGINE CONTROL MODULE
(
ENGINE ECU)(
M/T)
BRAKE FLUID
LEVEL SWJUNCTION
CONNECTOR
JUNCTION
CONNE CTOR
DAYTIME RUNNING
LIGHT RELAY
(
MAIN) PARKING
BRAKE SW
PARKING
BRAKE SW(
EX. 1MZ±FE A/T)
(
1MZ±FE A/T)
JUNCTION
CONNECTOR
JUNCTION
CONNECTOR (
USA)
(
CANA DA) C8 ,C9 , C10
J2
J2 B2
P3
P2 D4
J2
J3(
*1) (
*1)
(
USA)
II1 2
I6
G±O
G±O G±O
(
*2) FROM A/T
INDICATOR LIGHT
W±B
(
CA NADA)(
*5) (
*5)
O
(
*4)O
(
*4)
4
3B 203C 2
1D 31F3 7. 5A
IGN7. 5A
SRS
3B 19 3D19 3B 83D18
3D 83C8 3A 10
1M 51C 8
W

238
COMBINATION METER* 1 : W/O A/T INDICATOR
AB
A 11 A2A1
A 3
C13 B5 B 16
IGB 4
G
R R RG±B G±YL±R
R±YW±BB B
W±B W±B
GG
FROM ELECTRONIC
CONTROLLED
TRANSMISSION PATT
SELECT SW
FROM HA ZA RD S W(
TR)
FROM HA ZA RD S W(
TL) METER
ILLUMINATION
POWER
TURN RH
TURN LH
OPEN DOOR TO RHEOSTAT
TO DOOR COURTESY SW
COMBINATION METER C8 ,C9 ,C10AI13 II16
TO E NGINE CONTROL
MODULE(
ENGINE AN
ELECTRONIC CONTRO
TRANSMISSION ECU)
L±R
L±R L±R
(
*1)
(
*1)
2G 220A
DOME
G
15A
TA IL
1D 14
3C 4
3D 5
3D 203D 9
1C 5
3A 161C 1
3C 14
1D10
1D11
1L 83C183D 6 1D 2
1M 11C 11
FROM POWER SOURCE SYSTEM(
SEE PAGE 64)
ERN
D
LLED

239
B 2 BRAKE FLUID LEVEL SW1±2 : CLOSED WITH FLOAT DOWN
C 8(A), C 9(B), C10(C)
COMBINATION METER(A)2, (B)6, (B)9±GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION
(A)3, (B)14, (C)8±GROUND : ALWAYS CONTINUITY
F15
FUEL SENDER2±3 : APPROX. 3
WITH FUEL FULL
APPROX. 110.0
WITH FUEL EMPTY
O 1
OIL PRESSURE SW1±GROUND : CLOSED WITH OIL PRESSURE BELOW 0.2 KG/CM2 (2.84 PSI, 19.61 KPA)
P 2
PARKING BRAKE SW (1MZ±FE A/T)1±GROUND : CLOSED WITH PARKING BRAKE PEDAL DEPRESSED
P 3
PARKING BRAKE SW (EX. 1MZ±FE A/T)1±GROUND : CLOSED WITH PARKING BRAKE LEVER PULLED UP
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
B 228 (1MZ±FE), 30 (5S±FE)D 432P 233
C 8A32F1534 (S/D), 35 (C/P), 36 (W/G)P 333
C 9B32I 228 (1MZ±FE), 30 (5S±FE)V 528 (1MZ±FE), 30 (5S±FE)
C10C32J 233W 228 (1MZ±FE), 30 (5S±FE)
C1432O 128 (1MZ±FE), 30 (5S±FE)
: 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)
1B
1C
1D20COWL WIRE AND J/B NO 1 (INSTRUMENT PANEL LEFT)1F20COWL WIRE AND J/B NO. 1 (INSTRUMENT PANEL LEFT)
1L
1M
2G22COWL WIRE AND J/B NO. 2 (ENGINE COMPARTMENT LEFT)
3A
3B24COWL WIRE AND J/B NO 3 (BEHIND COMBINATION METER)3C24COWL WIRE AND J/B NO. 3 (BEHIND COMBINATION METER)
3D
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODESEE PAGEJOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
II142COWL WIRE AND INSTRUMENT PANEL WIRE
IJ142FLOOR NO. 1 WIRE AND COWL WIRE
IP144ENGINE WIRE AND COWL WIREIP344ENGINE WIRE AND COWL WIRE
46 (S/D)
BX148 (C/P)FUEL GAUGE WIRE AND FLOOR NO. 1 WIREBX1
50 (W/G)
FUEL GAUGE WIRE AND FLOOR NO. 1 WIRE
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
ED38 (1MZ±FE)INTAKE MANIFOLD LHED40 (5S±FE)INTAKE MANIFOLD LH
IE42LEFT KICK PANELIF42LEFT KICK PANEL
IG42INSTRUMENT PANEL BRACE LH
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
I 644INSTRUMENT PANEL WIREI1344COWL WIRE
I 944COWL WIREI1844ENGINE WIRE
SERVICE HINTS

241
RADIATOR FAN AND CONDENSER FAN (5S±FE)
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
A 130E 530 (5S±FE)
A 230 (5S±FE)R 130 (5S±FE)
: RELAY BLOCKS
CODESEE PAGERELAY BLOCKS (RELAY BLOCK LOCATION)
526R/B NO. 5 (ENGINE COMPARTMENT LEFT)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1A20COWL WIRE AND J/B NO. 1 (INSTRUMENT PANEL LEFT)
2B22ENGINE ROOM MAIN WIRE AND J/B NO 2 (ENGINE COMPARTMENT LEFT)2E22ENGINE ROOM MAIN 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)
EA140 (5S±FE)ENGINE ROOM MAIN WIRE AND ENGINE ROOM NO. 3 WIRE
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
EB40 (5S±FE)FRONT LEFT FENDER
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
E 540 (5S±FE)ENGINE ROOM MAIN WIRE

243
FAN MOTOR OPERATION
WITH THE IGNITION SW IS TURNED ON, CURRENT FLOWS FROM ECU±IG FUSE TO RADIATOR FAN RELAY NO. 1 (COIL SIDE) AND
RADIATOR FAN RELAY NO. 2 (COIL SIDE) " TERMINAL 2 OF THE A/C SINGLE PRESSURE SW " TERMINAL 3 " TERMINAL 2 OF THE
WATER TEMP. SW " TERMINAL 1 " GROUND, AND RADIATOR FAN RELAY NO. 1 AND NO. 2 ARE TURNED ON.
*RADIATOR FAN MOTOR OPERATION
WHEN THE IGNITION SW IS TURNED ON, RADIATOR FAN RELAY NO. 1 IS TURNED ON. IF AT THIS TIME THE ENGINE COOLANT
TEMPERATURE IS APPROX. 90°C (194°F) OR HIGHER, THE WATER TEMP. SW IS TURNED OFF, RADIATOR FAN RELAY NO. 1 IS
TURNED OFF.
AS A RESULT, CURRENT FROM THE RDI FAN FUSE TO RADIATOR FAN RELAY NO. 1 (POINT SIDE) " TERMINAL 2 OF THE
RADIATOR FAN MOTOR " TERMINAL 1 " GROUND, THUS ACTIVATING THE ROTATION OF THE RADIATOR FAN MOTOR.
*LOW SPEED OPERATION
WHEN THE IGNITION SW IS TURNED ON AND THE A/C ACTIVATED, RADIATOR FAN RELAY NO. 1 AND RADIATOR FAN RELAY NO. 2
ARE TURNED ON, CURRENT FLOWS FROM A/C MAGNETIC CLUTCH RELAY (POINT SIDE) TO RADIATOR FAN RELAY NO. 3 (COIL
SIDE) " GROUND, AND RADIATOR FAN RELAY NO. 3 IS TURNED ON.
AS A RESULT, CURRENT FLOWS FROM CDS FAN FUSE TO TERMINAL 2 OF THE A/C CONDENSER FAN MOTOR " TERMINAL 1 "
RADIAOTR FAN RELAY NO. 2 (POINT SIDE) " RADIATOR FAN RELAY NO. 3 (POINT SIDE) " TERMINAL 2 OF THE RADIATOR FAN
MOTOR " TERMINAL 1 " GROUND, FLOWING TO EACH FAN MOTOR IN SERIES, CAUSING THE FAN TO AT LOW SPEED.
*HIGH SPEED OPERATION OF THE FAN MOTOR DUARING A/C OPERATION
WHEN THE A/C OPERATION, THE REFRIGERRANT PRESSURE BECOME HIGHER THAN OR DINARY LEVEL (APPROX. 15.58 KG/CM
2
(221.2 PSI, 1527 KPA)) THE A/C SINGLE PRESSURE SW IS TURNED OFF. AS A RESULT, RADIATOR FAN RELAY NO. 1 AND RADIATOR
FAN RELAY NO. 2 ARE TURNED OFF, AND CURRENT FLOWS FROM RDI FUSE TO RADIATOR FAN RELAY NO. 1 (POINT SIDE) "
TERMINAL 2 OF THE RADIATOR FAN MOTOR " TERMINAL 1 " GROUND, AND CURRENT FLOWS FROM CDS FAN FUSE TO
TERMINAL 2 OF THE A/C CONDENSER FAN MOTOR " TERMINAL 1 " RADIATOR FAN RELAY NO. 2 (POINT SIDE) " GROUND, AND
TO EACH FAN MOTOR IN PARALLEL, THUS CAUSING THE FAN MOTORS OPERATE HIGH SPEED.
NOTE THAT, BECAUSE THE CURRENT FLOWS IN THE SAME MENNER EVEN IF THE ENGINE COOLANT TEMPERATURE IS APPROX.
90°C (194°F) OR HIGHER, THE FAN MOTOR OPERATE AT HIGH SPEED.
A 2 A/C SINGLE PRESSURE SW
2±3 : OPEN ABOVE APPROX. 15.58 KG/CM2 (221.2 PSI, 1527 KPA)
CLOSE BELOW APPROX. 15.56 KG/CM2 (178.4 PSI, 1231 KPA)
2 1
2 1 A1R1 BLACKGRAY
12E5 A2BLACK
23
SYSTEM OUTLINE
SERVICE HINTS

244
ELECTRONICALLY CONTROLLED HYDRAULIC COOLING FAN (1MZ±FE)
1212
2 3EC1 8
ECEB I18
IP2 7
42 310 9 816 5
6 I18
B±R B±R W±R
LLB
L L±W L±W
L±W
L±R L±R W±BL±YY Y±LBR BR
E SOL+ SOL± TH± TH+ HPIGB TAC IDL FROM POWER SOURCE SYSTEM(
SEEPAGE64)
TO COMBINATION
METERFROM THROTTLE
POSITION SENSOR
FROM ENGINE CONTROL MODULE
(
ENGINE AND ELECTRONIC
CONTROLLED TRANSMISSION ECU)
SOLENOID VALVE
(
FOR HYDRAULIC MOTOR)
ENGINE COOLANT
TEMP. SENSOR
(
WATER TEMP. SENSOR)
(
FOR COOLING FAN)DATA LINK
CONNECTOR 1
(
CHECK
CONNECTOR)A/C SINGLE
PRESSURE SW COOLING FAN ECU C14
S1
E5D1 A2 OPT
3A 153C 16
1A 715A
ECU±IG

245
THE COOLING FAN ECU RECEIVES VARIOUS SIGNAL, I.E., THE ENGINE RPM SIGNAL FROM THE IGNITER, COOLANT TEMPERATURE
SIGNAL FROM THE ENGINE COOLANT TEMP. SENSOR (WATER TEMP. SENSOR), A/C REFRIGERANT PRESSURE SIGNAL FROM A/C
SINGLE PRESSURE SW.
THE COOLING FAN ECU JUDGES THE ENGINE BASED ON SIGNALS FROM ABOVE MENTION, DRIVES THE SOLENOID VALVE AND
CONTROLS THE SPEED OF THE COOLING FAN STEPLESSLY
FAIL±SAFE FUNCTION
WHEN THE MALFANCTION IS DETECTED BY THE ENGINE COOLANT TEMP. SENSOR (WATER TEMP. SENSOR) OR SOLENOID VALVE,
THE FAIL±SAFE FUNCTION OF THE COOLING FAN ECU JUDGES THE SITUATION TO ALLOWS THE COOLING SYSTEM TO CONTINUE
OPERATION.
A 2 A/C SINGLE PRESSURE SW
2±3 : OPEN ABOVE APPROX. 15.58KG/CM2 (221.2PSI, 1527KPA)
CLOSED BELOW APPROX. 12.56 KG/CM2
(178.4PSI, 1231KPA)
C14 COOLING FAN ECU
1±GROUND : APPROX. 12 VOLTS WITH THE IGNITION SW ON
9±10 :2.5 VOLTS AT 20°C (68°F) AND IGNITION SW ON
1.2 VOLTS AT 80°C (176°F) AND IGNITION SW ON
8± 4 :10±14 VOLTS AT A/C PRESSURE SW ON (OPEN)
0±3 VOLTS AT A/C PRESSURE SW OFF (CLOSE)
4±GROUND : ALWAYS CONTINUITY
E 5 ENGINE COOLANT TEMP. SENSOR (WATER TEMP. SENSOR) (FOR COOLING FAN)
1±2 :1.5K
AT 80°C (176°F)
0.7K
AT 11 0°C (230°F)
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
A 228D 128S 129
C1432E 530
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1A20COWL WIRE AND J/B NO. 1 (INSTRUMENT PANEL 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)
EC138 (1MZ±FE)ENGINE WIRE AND ENGINE ROOM MAIN WIRE
IP244ENGINE WIRE AND COWL WIRE
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
EB38 (1MZ±FE)FRONT LEFT FENDER
EC38 (1MZ±FE)INTAKE MANIFOLD RH
: SPLICE POINTS
CODESEE PAGEWIRE HARNESS WITH SPLICE POINTSCODESEE PAGEWIRE HARNESS WITH SPLICE POINTS
I1844ENGINE WIRE
2312
534
6X8 91012
12 A2 C14S1 E5BROWN GRAY BLACKD1BLACK
6
XX X
XX X XX
X
SYSTEM OUTLINE
SERVICE HINTS

248
AIR CONDITIONING (PUSH CONTROL SW TYPE)
5 5
55
1 2
IP1 8EC1 4
IP3 9
IP3 4 I191
4
IR1 5IR16 IR14
5471
4 10 8 9 13 14 12 21
2 R±WR± BR±L
W± BW±R
L±WR±B R±W
W±R
W±L
L±Y
G B±Y LG±BB B BW±B
L± W(
*1)
L±Y
GL±B(
*1)
B± W
L± Y
R±LR± L R±L W±R
R±L
W±R
A/C DUAL
PRESSURE SW
A/C MAGNETIC
CLUTCH AND
LOCK SENSOR
A/C EVAPORATOR
TEMP. SENSOR
A/C MAGNETIC
CLUTCH RELAY
A/C AMPLIFIER
TO ENGINE CONTROL MODULE
(
ENGINE AND ELECTRONIC
CONTROLLED TRANSMISSION
ECU)(
A/T)
OR ENGINE CONTROL MODULE
(
ENGINE ECU)(
M/T) FROM ENGINE CONTROL MODULE
(
ENGINE AND ELECTRONIC
CONTROLLED TRANSMISSION
ECU)(
A/T)
OR ENGINE CONTROL MODULE
(
ENGINE ECU)(
M/T)
IGNITER245
13
W±R
A3A2
A11
A10
I2B±W
(
*
2) TO RADIATOR
FAN RELAY NO. 3E6
B± W
(
*1)
(
*2)
B±W(
*2) W±L(
*2)
TACH6
TAC
(
*2)
B
(
*1)
C14
COOLING FAN
ECU*1 : 1MZ±FE
*
2 : 5S±FE
1B 1
1D 12