1994 TOYOTA CAMRY temp.

242
RADIATOR FAN AND CONDENSER FAN (5S±FE)
2B 12E82B32E6
55 55
55 55 2G 6
2E5
1 2EA1 1
M
1 2M
1 2
E5 5
EB EB
W±B W±B B±R B±R L±B
B±R
L
B W±B
W±R R WB±O B±R
W±B W±B
L
B±R
BW±BW±B
B±W
OM POWER SOURCE SYSTEM(
SEE PAGE 64)
30A
RDI FAN
24 13
4
FROM A/C
MAGNETIC
CLUTCH RELAY RADIATOR
FAN RELAY
RADIATOR
FAN RELAY
NO. 2
RADIATOR
FAN RELAY
NO. 3
A/C SINGLE
PRESSURE SW
WATER
TEMP. SW
(
FOR COOLING
FA N)RADIATOR
FAN MOTORA/C CONDE NSE R
FAN MOTOR A1
A2
R1
E532 51 15 23
3 2
EA1 2
1A 7FR
15A
ECU±IG
3A 153C 16
2B 40A
CDS FAN
3

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

253
*2 : 5S±FE *
1 : 1MZ±FE
5 5
55
1 2
IP1 8EC1 4
IP3 9
IP 3 4 I191
4
IR1 5IR16 IR14
471
4 913 14 12 224
1 W±R
L±W
W±R
W±L
L±Y
G B±Y LG±BB B
L±W(*
1)
GL±B(*
1)
B±W
L±Y
R±LR±L R±L
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 CO NTRO L MO DULE
(
ENGINE AND E LECTRO NIC CO NTRO LLED
TRANSMISSION ECU)(
A/T)
OR ENGINE CONTROL MODULE
(
ENGINE ECU)(
M/T) FROM ENGINE CONTROL MODULE
(
ENGINE AND E LECTRO NIC CO NTRO LLED
TRANSMISSION ECU)(
A/T)
OR ENGINE CONTROL MODULE
(
ENGINE ECU)(
M/T)
IGNITER 2
15
8 104
4
5
W±B
W±BR±L
Y±G
R±B R±W
B
ON
OFF
A/C SW
A3
A1 1
A2
232 1
51
10A
A/C
TO RADIATOR FAN
RELAY NO. 3
(*
2) B±W
A10
I2 A1 2E6
B±W
(*
1)
(
*
2)
W±R
B±W(
*
2) W±L(
*
2)
6
B
(
*
1) B
(
*
2)
TAC
C14
COOLING FAN
ECU FACH
1B 1
1D 12

258
GROUND POINT
FRONT TURN SIGNAL
LIGHT RHABS ACTUATOR
FRONT CLEARANCE
LIGHT RH
FRONT SIDE MARKER
RH
FRON WIPER MOTOR
FRONT CLEARANCE
LIGHT LH
FRONT SIDE MARKER
LH
FRONT TURN SIGNAL
LIGHT LH
RADIATOR FAN MOTOR
HE ADLIGHT LO RH
HE ADLIGHT LO LH
ENGINE CONTROL
MODULE(
ENGIN AND
ELECTRONIC
CONTROLLED
TRANSMISSION ECU)
(
A/T)
ENGINE CONTROL
MODULE(
ENGINE ECU)
(
M/T)
NOISE FILER(
FOR
IGNI TI ON SYS TE M)
OXYGEN SENSORABS RELAY
ABS ECU
ABS ACTUATOR
AND ECU
DAYTIME RUNNING
LIGHT RELAY NO. 3
DAYTIME RUNNING
LIGHT NO. 4
CRUISE CONTROL
ACTUATOR
ENGINE MAIN RELAY
EFI MAIN RELAY
RADIATOR FAN RELAY
NO. 2
EC ED E4
E4
E4
E4
E4
E4I25 E6
EBEA
E5 EB15
EA125 7 7 7 7
2B2
5 2E4
E3 W±B
W±B
W±B
W±B
W±B
W±B
W±B
W±B W±B W±B W±B W±B
W±B
W±B
W±B(
*1)
W±B(
*1) W±B
W±B W±B
W±B W±B W±B
(
E)
(
GND)
(
GND)
(
CA NADA)
W±B
W±B
W±B W±B
W±B W±B
(
5S±FE)
E17
IP3 16IJ 1 18
BX13 I9 I9RADIATOR FAN RELAY
NO. 3
WATER TEMP. SW
(
FOR COOLING FAN)
A/C SINGLE
PRESSURE SW
DATA LINK
CONNECTOR 1
(
CHECK CONNECTOR)
DATA LINK
CONNECTOR 2(
TDCL)
COMBINATION METER
FUEL SENDER
ENGINE CONTROL
MODULE(
ENGINE
A ND ELE CTRONIC
CONTROLLED
TRANSMISSION
ECU)(
A/T)
ENGINE CONTROL
MODULE(
ENGINE
ECU)(
M/T) E5
E5
E5 BR
BR
BR (
E1)
W±BBR BR BR BR
BR
BR BR
BR BR
BR
BR
W±B
W±BBR W±BW±B W±B
BR
(
5S±FE)(
5S±FE)W±B W±B
W±BW±B W±B W±B
(
5S±FE)
(
5S±FE)
(
5S±FE)
(
1MZ±FE)
(
5S±FE)
BR
(
E01)
(
E02) W±B
BRW±B(
*1) W±B(
*1)
W±B(
*2)
W±B
3D13 3D3
3D 12

OVERALL ELECTRICAL WIRING DIAGRAM
5
678
3CAMRY(
Cont' d)
2 1
B D A D C CDD A D B C
D D C BAAAAAAADD AA ACCAAAAAA B
9II110 II 13
EE1 1EF1
2 1
2 1D BBABD BB B
BDCAA
1
1
IE Lef t
kick
panel 2 25 3 18241615263029122322 2322 12 1265678910 15 1413 2
13 11 5 1 20 5 14 14 20 14 315
16 28 4 325 2 3 411
A
A
A 3 113 1 7 32 22 21 8 9 BR G±W GR ± BB± OB BR B±WR±L
OX S HT S W FCIGT1
IGT2IGT3
IGT4IGT5
IGT6IGF
+B +B 1RSO
RS C SP 1EGR
ACIS #60 #50 #40 #30 #20 #10 KNKR KNKL
B± O
V1
VSV
(
for A/C Idle±Up) Fr om
STARTER
Fu se< 1± 2>
OX H T
(
SHIELDED)
H1 1
HEATED OXYGEN
SENSOR
(
Bank 1 Sens or 1)
E+B
OXR SDL STA TE2 TE1
ACVA/C
ACTNSW BATT THW (
SHI ELDED)
(
SHI EL DED)
(
SHI EL DED) WY GRL R G B± O G±R G±RR±LBRBR
BR B±O B±O 1
32
4
(
SHI ELDED)
V3
VSV(
for Fuel
Pressure Up) V4
VSV(
for
I ntake Cont rol)
HT
OX+B
E1 H9
HEATED
OXYGEN SENSOR
(
Bank 1 Sensor 2)Fr om Ignit er
<1±4>G± W W± B
ELS E1 EO1 EO3 E2 THA VG VG±
TACO
VCCVTA1
IDL1E2 STP THA VG NC2+B T1
THROTTL E
POSI TI ON
SENSORM6
MASS AIR FLOW
(
AI R FL OW METER)
Fr om Sto p
Light SW
<8±2><9±2>
A
A
AAA A
(
SHI ELDED) C18
CRANKSHAFT POSITI ON
SENSOR
K1
KNOCK SENSOR 2
K2
KNOCK SENSOR 1BR
BR
Engine Control(
1M Z±FE)
ENGINE CONTROL MODULE(
ENGI NE AND E LE CT RONI C CONTROL LE D TRANSMI S S I ON E CU) W± G
OXL HTLC B19 101 3 OX H T+B E2
H1 2
HEATED OXYGEN
SENSOR
(
Bank 2 Sens or 1)
4
C
HTR1
1C 8
1M 5 18 IP3
IP1
E4
ENGI NE COOL ANT T EMP.
SENSOR(
EFI WATER
TEMP. SENSOR)
E1
EGR GAS TEMP. SENSOR
To Cooling Fan ECU< 27±2>
To Tachomet er
NE
B G2 2+
C17
CAMSHAFT POSITION
SENSOR
(
SHIELDED)
B G22±
3 2 B NE ± 61G
1E 5
D6
DIODE
(
for Idle±Up)
Intake
ma n i f o l d
LHED 53D3C 5
J1
JUNCTION
CONNECTOR
12 IP3
1
EE12
EE14
EE1
A
1
2
V2
VSV(
for EGR)
I1
IDLE AIR CONTROL
VALVE(
I SC VAL VE)
IQ14
IQ15
IP316 II1 20
(
SHI EL DED) (
SHI EL DED)
BRBR
12
3D 3
3D BRSDL BATTSG CG1 112 4A
F 1
B±R
B±O
B±R
B±O
B
BR
W± B
B±W B±W
G± W
GR±B
W± L R± L
W V± R R±L R±L
R± L
L±B
(
SHI EL DED) (
SHIELDED)
R±L
D2 4
DA TA L I NK
CONNECTOR 3
W±LB±W LG±BB± Y
To A/C Aeplifier
< 35±4> < 36±5>
B±W B±WB±O
2
W± G
G± B
G± Y
F 2
THG
BBR
BR BR
BR
B±O
24
VG±C7
NC2±B4
W±L
Y± L L±B
R
R± B
W± BG±WBR B±Y L±R12 O6
O/ D D I RE CT
CLUTCH SPEED
SENSOR
(
SHI ELDED) (
SHI ELDED)
(
SHIELDED)(
SHI ELDED)
A34 16B± R G G From ' TAIL'
Fus e
<16±2><17±2>21 6 5 17
B±W
L
G R
G
B±W
L
G
BR BR
W±B
W±B
BR
BRW
WW
W
BR
BR
11
22
W± BWY GRL R
G R± YB±L B± R B±OB±O B±O
B±O A AA
J6
JUNCTION
CONNE CTORY± B G± B B±O B± OW±RG±RR±BL±B GR±BY± R W± GG±R G±RP± B B B
P±B
G±R
G±RB±O
B±OA
A
L±W
L
BR
W
W 11
J6
JUNCTION
CONNECTOR
J7
JUNCTION
CONNECTOR
(
Cont. next page)
B± O
L L
G
EO2
A
33W±B
W±B
8 2628 13
To Cooling Fan
ECU< 27±2>
To Cr ui se Con tro l
ECU< 24±2>
E7 A ,E10 D,E8 B ,E9 C*Malfunction Indicator Lamp(
Check Engine War ning Light) For the c onnect ors of t he parts listed below, s ee t he next page.
*Fuse Box
L±W
11 IM1D
V±Y
To Combinat ion
Meter < 33±2>
FPU
254
3B BR