coolant TOYOTA CAMRY 1994 XV10 / 4.G Wiring Diagrams User Guide

102
ENGINE CONTROL (5S±FE M/T EX. CALIFORNIA)
E11(A), E12(B), E14(C) ENGINE CONTROL MODULE (ENGINE ECU)
VOLTAGE AT ENGINE CONTROL MODULE (ECU) WIRING CONNECTOR
BATT ± E1: ALWAYS 9.0±14.0 VOLTS
+B ± E1:9.0±14.0 VOLTS (IGNITION SW AT ON POSITION)
+B1 ± E1:9.0±14.0 VOLTS (IGNITION SW AT ON POSITION)
IDL ± E1:9.0±14.0 VOLTS (IGNITION SW ON AND THROTTLE VALVE OPEN)
PIM ± E2:3.3± 3.9 VOLTS (IGNITION SW AT ON POSITION)
#10, #20 ± E01, E02:9.0±14.0 VOLTS (IGNITION SW AT ON POSITION)
THA ± E2:0.5± 3.4 VOLTS (IGNITION SW ON AND INTAKE AIR TEMP. 20°C, 68°F)
THW ± E2:0.2± 1.0 VOLTS (IGNITION SW ON AND COOLANT TEMP. 80°C, 176°F)
STA ± E1:6.0±14.0 VOLTS (ENGINE CRANKING)
IGT ± E1:0.8±1.2 VOLTS (ENGINE CRANKING OR IDLING)
ISCC, ISCO± E1:8.0±14.0 VOLTS (IGNITION SW AT ON POSITION)
W ± E1:9.0±14.0 VOLTS (IGNITION SW ON, NO TROUBLE AND ENGINE RUNNING)
ACT ± E1:9.0±14.0 VOLTS (IGNITION SW ON AND AIR CONDITIONING ON)
ACA ± E1:7.5±14.0 VOLTS (IGNITION SW ON AND AIR CONDITIONING ON)
TE1 ± E1:9.0±14.0 VOLTS (IGNITION SW ON)
RESISTANCE AT ENGINE CONTROL MODULE (ECU) WIRING CONNECTORS
(DISCONNECT WIRING CONNECTOR)
IDL ± E1: INFINITY (THROTTLE VALVE OPEN)
0 W (THROTTLE VALVE FULLY CLOSED)
THA ± E2:2.0 ±3.0 KW (INTAKE AIR TEMP. 20°C, 68°F)
THW ± E2:0.2 ±0.4 KW (COOLANT TEMP. 80°C, 176°F)
G+ ± G±:0.17±0.21 KW
ISCC, ISCO± +B, +B1:19.3±22.3 KW
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
A1032E14C30K 131
C 832F1534 (S/D), 35 (C/P), 36 (W/G)M 131
C 9A32I 131N 131
C10B32I 231O 231
D 130I 331O 331
D 230I 431T 131
D 332I 531V 131
D 632I 631V 231
E 130I 731V 331
E 430I1031V 531
E11A30I1233
E12B30J 133
: RELAY BLOCKS
CODESEE PAGERELAY BLOCKS (RELAY BLOCK LOCATION)
626R/B NO. 6 (BEHIND GLOVE BOX)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1A
1B
1C20COWL WIRE AND J/B NO 1 (INSTRUMENT PANEL LEFT)1D20COWL WIRE AND J/B NO. 1 (INSTRUMENT PANEL LEFT)
1G
1M
2A22ENGINE ROOM MAIN WIRE AND J/B NO. 2 (ENGINE COMPARTMENT LEFT)
2C22ENGINE WIRE AND J/B NO. 2 (ENGINE COMPARTMENT LEFT)
3A
3C24COWL WIRE AND J/B NO. 3 (BEHIND COMBINATION METER)
3D
24COWL WIRE AND J/B NO. 3 (BEHIND COMBINATION METER)
SERVICE HINTS

199
3
3C
28D 6 C 1
234I6
I18 I18
C
D B 20 A32 B7B1B22
C 5D 6D 3
D 112 1
BRG±OR±L L±R R±L
L±R BR BR
GR±B G±W
G± OL±R B±Y L±WG
BR
BR
R±L R±L
L±R L±RL±R
G±O THW IDL VTA VCP E2
L±W
L±WII2 4
R±L ENGINE COOLANT TEMP.
SENSOR(
EFI WATER
TEMP. SENSOR)
FROM
CRUISE CONTROL ECU
THROTTLE POSITION
SENSORFROM POWER SOURCE SYSTEM(
SEE PAGE 64)
JUNCTION
CONNECTOR
POWER
NORMAL ELECTRONIC CONTROLLED
TRANSMISSION
PATTERN SELECT SW
TE 2 TE1OD2
E1 TE 2 TE1
DA TA LINK CONNECTOR 1
(
CHECK CONNECTOR)JUNCTION
CONNECTOR D 12
SPEED
IP3 11 IP314 5124
G±B
G
23
1 VEHICLE SPEED
SENSOR
(
SPEED SENSOR)
LGP
R±L SP1
COMBINATION
METER
V5C8 T1
J3
E6E4
J1
D1I18II1 6
L±R TO
COMBINATION
METERL±R
IN1 6IN13
R±L
B E7 ,E8
AC,E9
ENGINE CONTROL MODULE(
ENGINE AND ELECTRONIC CONTROLLED TRANSMISSION ECU)
FROM
COOLING FAN ECU
L
D ,E10
IP 1 1
G± W
V±Y V±Y
AA
JUNCTION
CONNECTOR J7
BR
1K 81D6
3D 223D 10
10A
GAUGE

201
PREVIOUS AUTOMATIC TRANSMISSIONS HAVE SELECTED EACH GEAR SHIFT USING MECHANICALLY CONTROLLED THROTTLE
HYDRAULIC PRESSURE, GOVERNOR HYDRAULIC PRESSURE AND LOCK±UP HYDRAULIC PRESSURE. THE ELECTRONIC
CONTROLLED TRANSMISSION, HOWEVER, ELECTRICALLY CONTROLS THE LINE PRESSURE AND LOCK±UP PRESSURE ETC.,
THROUGH THE SOLENOID VALVE. ENGINE CONTROL MODULE (ENGINE AND ELECTRONIC CONTROLLED TRANSMISSION ECU)
CONTROL OF THE SOLENOID VALVE BASED ON THE INPUT SIGNALS FROM EACH SENSOR MAKES SMOOTH DRIVING POSSIBLE BY
SHIFT SELECTION FOR EACH GEAR WHICH IS MOST APPROPRIATE TO THE DRIVING CONDITIONS AT THAT TIME.
1. GEAR SHIFT OPERATION
DURING DRIVING, THE ENGINE CONTROL MODULE (ECU) SELECTS THE SHIFT FOR EACH GEAR WHICH IS MOST APPROPRIATE TO
THE DRIVING CONDITIONS, BASED ON INPUT SIGNALS FROM THE ENGINE COOLANT TEMP. SENSOR (EFI WATER TEMP. SENSOR)
TO TERMINAL THW OF THE ENGINE CONTROL MODULE (ECU), AND ALSO THE INPUT SIGNALS TO TERMINAL NC2+ OF THE ENGINE
CONTROL MODULE (ECU) FROM THE VEHICLE SPEED SENSOR (SPEED SENSOR) DEVOTED TO THE ELECTRONIC CONTROLLED
TRANSMISSION. CURRENT IS THEN OUTPUT TO THE ELECTRONIC CONTROLLED TRANSMISSION SOLENOIDS. WHEN SHIFTING TO
1ST SPEED, CURRENT FLOWS FROM TERMINAL S1 OF THE ENGINE CONTROL MODULE (ECU) " TERMINAL 3 OF THE ELECTRONIC
CONTROLLED TRANSMISSION SOLENOIDS " GROUND, AND CONTINUITY TO THE NO. 1 SOLENOID CAUSES THE SHIFT.
FOR 2ND SPEED, CURRENT FLOWS FROM TERMINAL S1 OF THE ENGINE CONTROL MODULE (ECU) " TERMINAL 3 OF THE
ELECTRONIC CONTROLLED TRANSMISSION SOLENOIDS " GROUND, AND FROM TERMINAL S2 OF THE ENGINE CONTROL
MODULE (ECU) " TERMINAL 1 OF THE ELECTRONIC CONTROLLED TRANSMISSION SOLENOIDS " GROUND, AND CONTINUITY TO
SOLENOIDS NO. 1 AND NO. 2 CAUSES THE SHIFT.
FOR 3RD SPEED, THERE IS NO CONTINUITY TO NO. 1 SOLENOID, ONLY TO NO. 2, CAUSING THE SHIFT.
SHIFTING INTO 4TH SPEED (OVERDRIVE) TAKES PLACE WHEN THERE IS NO CONTINUITY TO EITHER NO. 1 OR NO. 2 SOLENOID.
2. LOCK±UP OPERATION
WHEN THE ENGINE CONTROL MODULE (ECU) JUDGES FROM EACH SIGNAL THAT LOCK±UP OPERATION CONDITIONS HAVE BEEN
MET, CURRENT FLOWS FROM TERMINAL SL OF THE ENGINE CONTROL MODULE (ECU) " TERMINAL 2 OF THE ELECTRONIC
CONTROLLED TRANSMISSION SOLENOID " GROUND, CAUSING CONTINUITY TO THE LOCK±UP SOLENOID AND CAUSING
LOCK±UP OPERATION.
3. STOP LIGHT SW CIRCUIT
IF THE BRAKE PEDAL IS DEPRESSED (STOP LIGHT SW ON) WHEN DRIVING IN LOCK±UP CONDITION, A SIGNAL IS INPUT TO
TERMINAL STP OF THE ENGINE CONTROL MODULE (ECU), THE ENGINE CONTROL MODULE (ECU) OPERATES AND CONTINUITY TO
THE LOCK±UP SOLENOID IS CUT.
4. OVERDRIVE CIRCUIT
*O/D MAIN SW ON
WHEN THE O/D MAIN SW IS TURNED ON (O/D OFF INDICATOR LIGHT TURNS OFF), A SIGNAL IS INPUT TO TERMINAL OD2 OF THE
ENGINE CONTROL MODULE (ECU) AND ENGINE CONTROL MODULE (ECU) OPERATION CAUSES GEAR SHIFT WHEN THE
CONDITIONS FOR OVERDRIVE ARE MET.
*O/D MAIN SW OFF
WHEN THE O/D MAIN SW IS TURNED TO OFF, THE CURRENT FLOWING THROUGH THE O/D OFF INDICATOR LIGHT FLOWS
THROUGH THE O/D MAIN SW TO GROUND. CAUSING THE INDICATOR LIGHT TO LIGHT UP. AT THE SAME TIME, A SIGNAL IS INPUT
TO TERMINAL OD2 OF THE ENGINE CONTROL MODULE (ECU) AND ENGINE CONTROL MODULE (ECU) OPERATION PREVENTS
SHIFT INTO OVERDIRVE.
5. ELECTRONIC CONTROLLED TRANSMISSION PATTERN SELECT SW CIRCUIT
IF THE ELECTRONIC CONTROLLED TRANSMISSION PATTERN SELECT SW IS CHANGED FROM NORMAL TO POWER, THE CURRENT
FLOWING THROUGH THE POWER INDICATOR FLOWS TO GROUND, CURRENT FLOWS TO TERMINAL P OF THE ENGINE CONTROL
MODULE (ECU), THE ENGINE CONTROL MODULE (ECU) OPERATES, AND SHIFT UP AND SHIFT DOWN OCCUR AT HIGHER VEHICLE
SPEEDS THAN WHEN THE SW IS IN NORMAL POSITION.
SYSTEM OUTLINE

202
ELECTRONIC CONTROLLED TRANSMISSION AND A/T INDICATOR (1MZ±FE)
E 7(B), E 8 (C), E10(A)ENGINE CONTROL MODULE (ENGINE AND ELECTRONIC CONTROLLED TRANSMISSION ECU)
(TURN ON THE IGNTION SW)
S1, S2± E1 : 9.0±14.0 VOLTS WITH SOLENOID ON
0±1.5 VOLTS WITH SOLENOID OFF
P± E1:7.5±14.0 VOLTS WITH IGNITION SW ON AND PATTERN SELECT SW AT POWER POSITION
L± E1:7.5±14.0 VOLTS WITH SHIFT LEVER AT L POSITION
2± E1:7.5±14.0 VOLTS WITH SHIFT LEVER AT 2 POSITION
R± E1:7.5±14.0 VOLTS WITH SHIFT LEVER AT R POSITION
STP± E1:9.0±14.0 VOLTS WITH BRAKE PEDAL DEPRESSED
THW± E2:0.2±1.0 VOLTS WITH WITH ENGINE COOLANT TEMP. 60°C (140°F) ±120°C (248°F)
IDL± E2:0±1.5 VOLTS WITH THROTTLE VALVE FULLY CLOSED
9.0±14.0 VOLTS WITH THROTTLE VALVE FULLY OPENED
VTA±E2:0.3±0.8 VOLTS WITH THROTTLE VALVE FULLY CLOSED
3.2±4.9 VOLTS WITH THROTTLE VALVE FULLY OPENED
VC± E2:4.5±5.5 VOLTS WITH IGNITION SW AT ON POSITION
OD1± E1:4.5±5.5 VOLTS WITH IGNITION SW AT ON POSITION
OD2± E1:9.0±14.0 VOLTS WITH O/D MAIN SW TURNED OFF
0±3.0 VOLTS WITH O/D MAIN SW TURNED ON
IGSW± E1:9.0±14.0 VOLTS WITH IGNITION SW AT ON POSITION
+B± E1:9.0±14.0 VOLTS WITH IGNITION SW AT ON POSITION
+B1± E1:9.0±14.0 VOLTS WITH IGNITION SW AT ON POSITION
E 2
ELECTRONIC CONTROLLED TRANSMISSION SOLENOID1, 2, 6±GROUND : EACH 11±15 W
O 5 O/D MAIN SW1±3 : CLOSED WITH O/D MAIN SW OFF, OPEN WITH O/D MAIN SW ON
: PARTS LOCATION
CODESEE PAGECODESEE PAGECODESEE PAGE
C 832E 9C32O 533
C1132E10D32O 629
D 128J 133P 129
E 228J 233S1033
E 428J 333T 129
E 632J 733V 529
E 7A32N 2A33
E 8B32N 3B33
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODESEE PAGEJUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1A
1D20COWL WIRE AND J/B NO 1 (INSTRUMENT PANEL LEFT)1K20COWL 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)2D22ENGINE 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)
II142COWL WIRE AND INSTRUMENT PANEL WIRE
II242INSTRUMENT PANEL WIRE AND COWL WIRE
IN142INSTRUMENT PANEL WIRE AND SWITCH WIRE
IP144ENGINE WIRE AND COWL WIREIP344ENGINE WIRE AND COWL WIRE
IQ144ENGINE WIRE AND INSTRUMENT PANEL WIRE
: GROUND POINTS
CODESEE PAGEGROUND POINTS LOCATION
EB38 (1MZ±FE)FRONT LEFT FENDER
ED38 (1MZ±FE)INTAKE MANIFOLD LH
IF42LEFT KICK PANEL
SERVICE HINTS

205
* 2 : W/O A/T INDICATOR LIGHT *
1 : W/ A/T INDICATOR LIGHT
*
3 : EX. CALIFORNIA
CB
II1 6
IQ1 7IQ18IQ114 IQ113 II15IQ19 IP3 1 L2DNRP
43109872
I18
I6 I6
I13
I18 II24
B 7TT
A 7OD2 B 4
THWA 6
PA 19
LA 18
2
IF 96 3
3
B DC
B 17 5 9DD 6C
8131110 7 5 4 3 C
2 1R±L R±L R±L
L±R
BR
BR±B
G±O
BRW±B G±OR±L
L±R
L±R
L±R LG
L±R
Y±L
O
R±L
L±R
Y±L
O
B±O
R
R±B
G±W G±WR±BR B±OOY±L Y±L
O
R±L W±BG±O BR±B BR±B
G±O
G±O
BR
W±B
FROM POWER SOURCE SYSTEM(
SEE PAGE 64)
POWER
NORMAL ENGINE COOLANT TEMP. SNESOR
(
EFI WATER TEMP. SENSOR)
JUNCTION
CONNECTOR
JUNCTION
CONNE CTOR O/D MAIN SW A/T INDICATOR LIGHT
[COMB. METER]A/T INDICATOR SW
[PA RK/NEUTRA L
POSITION SW
(
NEUTRAL START SW)
] JUNCTION
CONNECTOR
DA TA LINK
CONNE CTOR 1
(
CHECK CONNE CTOR)DATA LINK
CONNECTOR 2
(
TDCL) TT ECT
E1 TT
ELECTRONIC
CONTROLLE D
TRANSMISSION
PATTERN SELECT SW
R±B
ENGINE CONTROL MODULE
(
ENGINE A ND E LE CTRONIC
CONTROLLED TRANSMISSION
ECU)
C11
O5
J2
D1D3J1 E7 , E8 ,E10
E4
P1
E6
J3
A
3 1 IP1 15
BR±B
I18 IP3 2
R±LR±L
R±L
R±L
R±L
O Y±L
P R
N
D2 L POWER O/D OFF
B
BR3E1II1 2
G±O
(
*1)
(
*1)(
*1)
(
*1)
(
*1)
(
*1)
(
*1)
(
*1)
(
*1)
(
*1)
I1
R±B
R±B
TO BA CK± UP LI GHT
I18 TO
COMBINATION METER
L±RIN16
R±L
IN13
L±R
(
*2)TO GENERATOR
(
ALTERNATOR)R±L
IP 16
IP 113
1K 8GE
1D6
10A
GAU
3D12
3D3

206
ELECTRONIC CONTROLLED TRANSMISSION AND A/T INDICATOR (5S±FE)
PREVIOUS AUTOMATIC TRANSMISSIONS HAVE SELECTED EACH GEAR SHIFT USING MECHANICALLY CONTROLLED THROTTLE
HYDRAULIC PRESSURE, GOVERNOR HYDRAULIC PRESSURE AND LOCK±UP HYDRAULIC PRESSURE. THE ELECTRONIC
CONTROLLED TRANSMISSION, HOWEVER, ELECTRICALLY CONTROLS THE LINE PRESSURE AND LOCK±UP PRESSURE ETC.,
THROUGH THE SOLENOID VALVE. ENGINE CONTROL MODULE (ENGINE AND ELECTRONIC CONTROLLED TRANSMISSION ECU)
CONTROL OF THE SOLENOID VALVE BASED ON THE INPUT SIGNALS FROM EACH SENSOR MAKES SMOOTH DRIVING POSSIBLE BY
SHIFT SELECTION FOR EACH GEAR WHICH IS MOST APPROPRIATE TO THE DRIVING CONDITIONS AT THAT TIME.
1. GEAR SHIFT OPERATION
DURING DRIVING, THE ENGINE CONTROL MODULE (ECU) SELECTS THE SHIFT FOR EACH GEAR WHICH IS MOST APPROPRIATE TO
THE DRIVING CONDITIONS, BASED ON INPUT SIGNALS FROM THE ENGINE COOLANT TEMP. SENSOR (EFI WATER TEMP. SENSOR)
TO TERMINAL THW OF THE ENGINE CONTROL MODULE (ECU), AND ALSO THE INPUT SIGNALS TO TERMINAL SP1 OF THE ENGINE
CONTROL MODULE (ECU) FROM THE VEHICLE SPEED SENSOR (SPEED SENSOR) DEVOTED TO THE ELECTRONIC CONTROLLED
TRANSMISSION. CURRENT IS THEN OUTPUT TO THE ELECTRONIC CONTROLLED TRANSMISSION SOLENOIDS. WHEN SHIFTING TO
1ST SPEED, CURRENT FLOWS FROM TERMINAL S1 OF THE ENGINE CONTROL MODULE (ECU) " TERMINAL (A)3 OF THE
ELECTRONIC CONTROLLED TRANSMISSION SOLENOIDS " GROUND, AND CONTINUITY TO THE NO. 1 SOLENOID CAUSES THE
SHIFT.
FOR 2ND SPEED, CURRENT FLOWS FROM TERMINAL S1 OF THE ENGINE CONTROL MODULE (ECU) " TERMINAL (A)3 OF THE
ELECTRONIC CONTROLLED TRANSMISSION SOLENOIDS " GROUND, AND FROM TERMINAL S2 OF THE ENGINE CONTROL
MODULE (ECU) " TERMINAL (A)1 OF THE ELECTRONIC CONTROL TRANSMISSION SOLENOIDS " GROUND, AND CONTINUITY TO
SOLENOIDS NO. 1 AND NO. 2 CAUSES THE SHIFT.
FOR 3RD SPEED, THERE IS NO CONTINUITY TO NO. 1 SOLENOID, ONLY TO NO. 2, CAUSING THE SHIFT.
SHIFTING INTO 4TH SPEED (OVERDRIVE) TAKES PLACE WHEN THERE IS NO CONTINUITY TO EITHER NO. 1 OR NO. 2 SOLENOID.
2. LOCK±UP OPERATION
WHEN THE ENGINE CONTROL MODULE (ECU) JUDGES FROM EACH SIGNAL THAT LOCK±UP OPERATION CONDITIONS HAVE BEEN
MET, CURRENT FLOWS FROM TERMINAL SL OF THE ENGINE CONTROL MODULE (ECU) " TERMINAL (B)1 OF THE ELECTRONIC
CONTROLLED TRANSMISSION SOLENOID " GROUND, CAUSING CONTINUITY TO THE LOCK±UP SOLENOID AND CAUSING
LOCK±UP OPERATION.
3. STOP LIGHT SW CIRCUIT
IF THE BRAKE PEDAL IS DEPRESSED (STOP LIGHT SW ON) WHEN DRIVING IN LOCK±UP CONDITION, A SIGNAL IS INPUT TO
TERMINAL B/K OF THE ENGINE CONTROL MODULE (ECU), THE ENGINE CONTROL MODULE (ECU) OPERATES AND CONTINUITY TO
THE LOCK±UP SOLENOID IS CUT.
4. OVERDRIVE CIRCUIT
*O/D MAIN SW ON
WHEN THE O/D MAIN SW IS TURNED ON (O/D OFF INDICATOR LIGHT TURNS OFF), A SIGNAL IS INPUT TO TERMINAL OD2 OF THE
ENGINE CONTROL MODULE (ECU) AND ENGINE CONTROL MODULE (ECU) OPERATION CAUSES GEAR SHIFT WHEN THE
CONDITIONS FOR OVERDRIVE ARE MET.
*O/D MAIN SW OFF
WHEN THE O/D MAIN SW IS TURNED TO OFF, THE CURRENT FLOWING THROUGH THE O/D OFF INDICATOR LIGHT FLOWS
THROUGH THE O/D MAIN SW TO GROUND. CAUSING THE INDICATOR LIGHT TO LIGHT UP. AT THE SAME TIME, A SIGNAL IS INPUT
TO TERMINAL OD2 OF THE ENGINE CONTROL MODULE (ECU) AND ENGINE CONTROL MODULE (ECU) OPERATION PREVENTS
SHIFT INTO OVERDRIVE.
5. ELECTRONIC CONTROLLED TRANSMISSION PATTERN SELECT SW CIRCUIT
IF THE ELECTRONIC CONTROLLED TRANSMISSION PATTERN SELECT SW IS CHANGED FROM NORMAL TO POWER, THE CURRENT
FLOWING THROUGH THE POWER INDICATOR FLOWS TO GROUND, CURRENT FLOWS TO TERMINAL P OF THE ENGINE CONTROL
MODULE (ECU), THE ENGINE CONTROL MODULE (ECU) OPERATES, AND SHIFT UP AND SHIFT DOWN OCCUR AT HIGHER VEHICLE
SPEEDS THAN WHEN THE SW IS IN NORMAL POSITION.
E 7(C), E 8 (B), E10(A)ENGINE CONTROL MODULE (ENGINE AND ELECTRONIC CONTROLLED TRANSMISSION ECU)
(TURN ON THE IGNTION SW)
S1, S2 ±E1 :9.0±14.0 VOLTS WITH SOLENOID ON
0±1.5 VOLTS WITH SOLENOID OFF
P ±E1:7.5±14.0 VOLTS WITH IGNITION SW ON AND PATTERN SELECT SW AT POWER POSITION
L± E1:7.5±14.0 VOLTS WITH SHIFT LEVER AT L POSITION
2± E1:7.5±14.0 VOLTS WITH SHIFT LEVER AT 2 POSITION
R± E1:7.5±14.0 VOLTS WITH SHIFT LEVER AT R POSITION
B/K± E1:9.0±14.0 VOLTS WITH BRAKE PEDAL DEPRESSED
THW± E2:0.2±1.0 VOLTS WITH WITH ENGINE COOLANT TEMP. 60°C (140°F) ±120°C (248°F)
IDL± E2:0±1.5 VOLTS WITH THROTTLE VALVE FULLY CLOSED
9.0±14.0 VOLTS WITH THROTTLE VALVE FULLY OPENED
SYSTEM OUTLINE
SERVICE HINTS

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

OVERALL ELECTRICAL WIRING DIAGRAM
1
234
5CAMRY
4ACC
IG1
ST1
IG2
ST2 AM1 2
9 10 AM2
2 1
2 1
2 1
2 1
6412G 12H21G8
1G 92D 2
661A 6
2B 2
1E 14
2D12 IP3
IP19
3EF1
EB BL1C 113A 13
3C 18
1M 116 IJ1
BX14
BX15
5 4
M21
21
21
EC 15 IP3 2C 3
ACCAAA CBBBBBA A A A C C C C B B
C A AAA BB B CABB
EC ED1 11IP1
19 IP3 13 IP3C1G 3
3D 5
3D 18
3D 7 3C 51B 6
666
21 A
B
W±R W W W B
W± B
B±Y
B± O
W± RB±O
W± B
B± O B± O B±O B±O
B±O
G± Y
G±R
LG
LG
L±B
G±R
BR
B± Y
R
B
L
B± R
G± R
R
L
B
Y V±YW W± R
W± B W± BR± L
WW
BR
W± B
W± BY± G
G±W
R±W W G±R R± W G±WGR B± OL±B W± R W± R W± R
Y W±B W±B W±BB±W
B±O
BR BRW± L
BR
BR
BR
BR
R
R
G
P
R± L
GR
G± W
R±WY W G±R
W± G
BW± R W
Y W± R W± R L±B
L±B
W± BL±B B±OB± OBR BR BR BR
G±R
G±R R±W
G±W
GRB±Y
BR
R± L
271
10 9
1216
4313 2963 128
8 2 1
15 2 13 9 8 12 1
3417185
11 22 32613 15 6 8 7
1412123432 1
2
13
32 I12
IGNITION SW
100A ALT
FUSE BOX
30A
AM215A
EFI7. 5A
IGN
EF I MAI N REL AY
I1
I DLE AIR CONTROL
VALVE(
I SC VALVE)
V1
VSV(
for A/C Idle±Up) CIRCUIT OPENING
RE LA Y
E4
ENGINE COOLANT TEMP. SENSOR
(
EFI WATER TEMP. SENSOR)
I10
I NTAKE AIR TEMP. SENSOR
(
IN±AIR TEMP. SENSOR)
E1
EGR GAS TEMP. SENSOR BATTERYF15
FUEL PUMPI7
INJECTOR
NO. 4 I5
INJECTOR
NO. 2 I6
INJECTOR
NO. 3 I4
INJECTOR
NO. 1
D 1 DATA LINK CONNECTOR 1
CHECK CONNECTOR)D3DATALINK
CONNECTOR 2(
TDCL)
O2
OXYGEN SENSOR(
Sub)
K1
KNOCK SENSOR
E1 FP B TE1 TE2 VF1 W OX2TE1 TE2 ENG W STA +B +B1 ISCO ISCC ISCV
BATTE21 THW THA THG E2 PIM VC ACT ACA ELS W NE+ NE± G±
FC # 10 TE1 TE2 VF OX1 KNKOX2E01
E02 IGFIGT
SPD E2 PIM VC M1
MANIFOLD
ABSOLUTE
PRESSURE
SENSOR(
VA CCUM
SENSOR)T1
THROTTL E
POSI TI ON
SENSOR
D6
DI ODE(
for Idle±Up)
MAL FUNCT I ON
INDICATOR LAMP
(
CHE CK ENGI NE
WARNING LIGHT)
[COMB. METER]
10A
GA UGE J2
JUNCTION
CONNECTOR
Fr om Dist ributor
<2±3>
Fr om º TAILº
Fuse<16±2><17±2>
Fr om Ign it er
<2±3>
To Combination Meter
< 33±2>L±B G±R
G±R
FL MAIN
2. 0LB±O B±O
(
*1)
132 51
2
Under
the left
quar ter
pillar Instrument
panel
brace LH Front left
f enderIntake manifold
RH10
2 5 11TC ABTC AB
LG±R
Y± B G± L To Cru i se
Contr ol ECU< 24±2>
To ABS ECU
< 25±3> < 26±3>
To Cen ter
Air bag Sensor
As sembl y
< 23±4>From STARTER Fuse
< 2±1>
Fr om SRS War ning
Light[ COMB. METER]
< 23±4> From Cent er Airbag
Sensor Assembly< 23±4>
From ABS ECU
<25±2><26±3>
16TSR±G
To ABS ECU
< 25±3> < 26±3>
Intake
ma n i f o l d
LH Intake
manif old
RH 91D
18
IP1
W±R W± R
B10 12
B
IDL VT A
B± Y LG±B
To A/C
Amplifier
< 35±4> < 36±5>
21C
R± L3D 19
G±RG±R(
*2)
*2: TMCMade
11 IP1
B± O
19 IP1
7
40A AM1
6A
3
B
3
3D
3D 12
16 IP3
ED 12B± Y
14G± B
A/DFr om Cru i se
Contr ol ECU< 24±3>
From ABS ECU
< 25±2> < 26±3>
Intake
man if ol d
LH ABS
3BR
BR BRE1 E2
VC
VTA
IDL
3P
From º MIR±HTRº
Fuse< 24±4>
< 28±1>
(
*1)
Engine Control(
5S±FE Ex. A/T and California M/T) Power
Source
EGRAGV2
VSV(
for EGR Syst em)231 2B± O
B± O
G±R(
*3) R± W
A #20
25
L±B W± B
W
Y
B±Y Fro m SRS
Warning Light
[COMB. METER]
< 23±4>
*3: TMMMade
E NGI NE CONTROL MODUL E(
ENGI NE ECU) B±O
W± G W± B15B
1B
F10 A , F1 6 B
4IP1 B±W
C9 A ,C10 B
11
E1 1 A , E14 C,E12 B *1 : SHI ELDEDFor the connec tor s of t he part s listed below, s ee t he next page.
*Fus e Box
*Engine Control Module(
Engine ECU)
*Malfanc tion Indic ator Lamp(
Check Engine Warning Light)
IGG+
L
L To Cruise Control ECU
< 24±2>
B±W
O3
OXYGEN SENSOR(
Main)
1W
(
*1)
BR BR BRA
24E1BR
W(
*1)
4
R±L
4 OX 1
From Igniter
<2±3>B19IG
(
Cont. next page)