1994 TOYOTA CAMRY transmission

197
7. AUTO CANCEL FUNCTION
A) IF ANY OF THE FOLLOWING OPERATING CONDITIONS OCCURS DURING CRUISE CONTROL OPERATION, THE SET SPEED IS
ERASED, CURRENT FLOW TO MAGNETIC CLUTCH IS CUT OFF AND THE CRUISE CONTROL IS RELEASED. (MAIN SW TURNS OFF).
WHEN THIS OCCURS, THE IGNITION SW MUST BE TURNED OFF ONCE BEFORE THE MAIN SW WILL TURN ON AGAIN.
*OVER CURRENT TO TRANSISTOR DRIVING MOTOR AND/OR MAGNETIC CLUTCH.
*WHEN CURRENT CONTINUED TO FLOW TO THE MOTOR INSIDE THE ACTUATOR IN THE THROTTLE VALVE ªOPENº DIRECTION.
*OPEN CIRCUIT IN MOTOR AND/OR MAGNETIC CLUTCH.
*MOMENTARY INTERRUPTION OF VEHICLE SPEED SIGNAL.
*SHORT CIRCUIT IN CRUISE CONTROL SW.
*MOTOR DOES NOT OPERATE DESPITE THE MOTOR DRIVE SIGNAL BEING OUTPUT.
B) IF ANY OF THE FOLLOWING CONDITIONS OCCURS DURING CRUISE CONTROL OPERATION, THE SET SPEED IS ERASED AND
THE CRUISE CONTROL IS RELEASED. CURRENT FLOW TO MAGNETIC CLUTCH IS CUT OFF UNTIL THE SET SW IS ªONº AGAIN.)
*WHEN THE VEHICLE SPEED HAS FALLEN BELOW THE MINIMUM SPEED LIMIT, APPROX. 40 KM/H (25 MPH)
*WHEN THE VEHICLE SPEED HAS FALLEN MORE THAN 16 KM/H (10 MPH) BELOW THE SET SPEED, E.G. ON AN UPWARD SLOPE.
*WHEN POWER TO THE CRUISE CONTROL SYSTEM IS MOMENTARILY CUT OFF.
C) IF ANY OF THE FOLLOWING CONDITIONS OCCURS DURING CRUISE CONTROL OPERATION, THE CRUISE CONTROL IS
RELEASED.
*OPEN CIRCUIT FOR TERMINAL 1 OF CRUISE CONTROL ECU.
8. AUTOMATIC TRANSMISSION CONTROL FUNCTION
*IN OVERDRIVE. IF THE VEHICLE SPEED BECOMES LOWER THAN THE OVERDRIVE CUT SPEED (SET SPEED MINUS APPROX. 4
KM/H, 2.5 MPH) DURING CRUISE CONTROL OPERATION, SUCH AS DRIVING UP A HILL, THE OVERDRIVE IS RELEASED AND THE
POWER INCREASED TO PREVENT A REDUCTION IN VEHICLE SPEED.
*AFTER RELEASING THE OVERDRIVE, IF VEHICLE SPEED BECOMES HIGHER THAN THE OVERDRIVE RETURN SPEED (SET
SPEED MINUS APPROX. 2 KM/H, 1.2 MPH) AND THE ECU JUDGES BY THE SIGNALS FROM POTENTIOMETER OF THE ACTUATOR
THAT THE UPWARD SLOPE HAS FINISHED, OVERDRIVE IS RESUMED AFTER A WHILE.
C 2 CRUISE CONTROL ACTUATOR
1±3 : APPROX. 2 K

5±4 : APPROX. 38

C13 CRUISE CNTROL SW MAIN [COMB. SW]
15±20 : CONTINUITY WITH MAIN SW ON
20±17 : APPROX. 418
WITH CANCEL SW ON
APPROX. 68
WITH RESUME/ACCEL SW ON
APPROX. 198
WITH SET/COAST SW ON
C16 CRUISE CONTROL ECU
14±GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION
1,15±GROUND : ALWAYS APPROX. 12 VOLTS
3±GROUND : CONTINUITY WITH PARKING BRAKE SW ON (ONE OF THE CANCEL SW) OR BRAKE LEVEL WARNING SW ON
20±GROUND :4 PULSE WITH 1 ROTATION OF ROTOR SHAFT
18±GROUND : APPROX. 418
WITH CANCEL SW ON IN CONTROL SW
APPROX. 68
WITH RES/ACC SW ON IN CONTROL SW
APPROX. 198
WITH SET/COAST SW ON IN CONTROL SW
13±GROUND : ALWAYS CONTINUITY
2±GROUND : CONTINUITY WITH SHIFT LEVER AT N POSITION (A/T) OR CLUTCH PEDAL DEPRESSED (M/T)
SERVICE HINTS

198
ELECTRONIC CONTROLLED TRANSMISSION AND A/T INDICATOR (1MZ±FE)
A
2D 22C32D4 2B 2
I23
I18
2 1
EBED IP 1 18 IP1 11 IP312
D 7 D 24 D 14 D 22 D 23
A 27 A11 A17 A33 B4
26FROM POWER SOURCE SYSTEM(
SEE PAGE 64)
P±L P±LV L±Y W±B
B±O
B±OB±O
W±L
G±W G±W
Y±BW±GB±OR±Y
W±L Y±L W±BB±O
15A
EFI
SL S1 S2 E02 NC2± +B +B1 BATT STP OD1EFI MAIN
RELAY
FROM
CRUIS E CONTROL ECU
BR P±L
TO CRUISE
CONTROL ECU
15 23
O/D DIRECT CLUTCH
SPEED SENSOR O6STOP LIGHT SW
G±R
G±W
2 1
S10
B 1 A 2
B 2B1NOISE FILTER
(
FOR STOP LIGHT) N2 ,N3 A
G±W
G±R
B E7 ,E8AC,E9
ENGINE CONTROL MODULE(
ENGINE AND ELECTRONIC CONTROLLED TRANSMISSION ECU)
B±O
D ,E10
A
3
ELECTRONIC CONTROLLED
TRANSMISSION SOLENOID E2 4 A
1
J UNCTION
CONNECTOR J7
A 3SLN±
Y±GB±O
B±OB±O
W±B
W±B
BR
A 34E01
A 28E03
A 16E1
B 9NC2+
Y±L
W±B
1D 91M3 7. 5A
IGN15A
STOP
1A 15
3B 43C 191M 6

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

200
ELECTRONIC CONTROLLED TRANSMISSION AND A/T INDICATOR (1MZ±FE)
BC
L 2DNR P
43109872
I6I18
I18
IQ1 7IQ18IQ114 IQ113 IP31IQ19
II1 5
3 1 II1 2
B B 81311107543 D 2D10 D15
6
B
IF 9 R±L
L±R
R±L
G±O
G±O G±O W±B R±BO Y±LR±L
W±B W±BG± O
R±B R±B
G± WR B±OO Y±L L±R
R±L
Y±L
OY±L
O
B±O
R
R±B
G±W
L2R
ENGINE CONTROL MODULE
(
ENGINE AND ELECTRONIC
CONTROLLED TRANSMISSION ECU)A/T INDICATOR SW
[PARK/NEUTRAL POSITION SW
(
NEUTRAL START SW)
]
JUNCTION
CONNECTOR
O/DMAINSW A/T INDICATOR LIGHT
[COMB. METER]
O/D
POWERL2DNRP I18 IP32
R±L
E7 , E8 ,E10AP1
C11
O5J2
R±L
R±L
(
*1) (
*1)
I1
R±B
TO BACK±UP LIGHT R±B (
*1) (
*1) (
*1) (
*1) (
*1) (
*1)
(
*1) (
*1)
* 1 : W/ A/T INDICATOR LIGHT
R±L
TO GENE RATOR(
ALTERNATOR)
IP 16
O Y±L
I19
R±B
IP 113

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

204
ELECTRONIC CONTROLLED TRANSMISSION AND A/T INDICATOR (5S±FE)
A
C,B
A2D 2
2B 22C32D4
IP 1 11 IP312 IP 1 18
I23
A 1A3B1 A 12
BA 13
B1A 1
BATTA 4
B/KA 22
NSWB 12
IDLB 1
VCB 11
VTAB 9
E2
C 15S2
C 2S1
C 1SL
C 14E1
C 13E01
C 26E02
EBEC EDE21 2431
I18
E18 I18BRBR
BR
B±O B±O
G±W
R
BR
R
BR BRR B±W G±W G±WW±B
B±O
W±G B±O B±O
B±O
W±L
V
L±Y P±L
W±B
W±BBR W±B
L
B
FROM POWER SOURCE SYSTEM(
SEE PAGE 64)
15A
EFI
EFI MAIN
RE LA YTHROTTLE POSITION SENSOR
ELECTRONIC CONTROLLED
TRANSMISSION SOLENOID
FROM IGNITION
SW º ST1º
IP 316
BR
E2 ,E3
E7 E8 ,E10T1
A
B
WB
B 16E17
25 13
A 9
SPEED
IP3 11 IP314 5124
G±B
G
23
1 VEHICLE SPEED
SENSOR
(
SPEED SENSOR)
LGP
R±L SP1
COMBINATION
METER
V5C8V±Y V±Y
BR BR FROM MANIFOLD ABSOLUTE
PRESSURE SENSOR
(
V ACUUM S ENS OR) TO MANIFOLD ABSOLUTE
PRESSURE SENSOR
(
V ACUUM S ENS OR)
BR
BR
STOP LIGHT SW
G±R
G±W
2 1
S10
B
1 A 2
B 2B1
NOISE FILTER
(
FOR S TOP L IGHT) N2 ,N3
A
G± W
G±R NO. 3
(
LOCK±UP) NO. 1 NO. 2
E NGINE CONTROL MODULE(
ENGINE AND ELECTRONIC CONTROLLED TRANSMISSION ECU)
(
*3)
1A 15
3B 43C 191M 6
1D 97. 5A
IGN1M 315A
STOP
3D22
3D10

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