Lexus ES300 (2002 year). Manual — part 52
82
Electronically Controlled Transmission and A/T Indicator
LL
2L
DL
NL
RL
PL
8
4
7
5
2
1
3
3B
3B
100
120
3B
3B
110
130
3A
3A
94
94
3B
3B
101
121
3B
3B
91
111
3A
3A
104
104
3B
3B
107
127
3B
3B
103
123
3B
3B
43
63
3A
3A
110
110
3A
3A
90
90
3B
3B
83
103
3B
3B
89
109
3B
3B
81
101
3B
3B
80
100
IL1
22
IL1
20
IL1
21
IL1
18
IL2
2
IL1
19
2L
5
2R
5
3B
3B
104
124
3B
3B
84
104
A
37
A
34
A
36
B
22
A
35
A
15
B
23
A
16
(*1)
(*2)
(*1)
(*2)
Y
L–
W
W–
L
R–
B
R–
B
G–
W
W
B–
R
W
LG
–
B
W
W
W
Y
W–L
L–W
Y–B
R–B
R–L
W
W–
L
Y
L–
W
W
W
Y–
B
R–
B
W
W
A/T Indicator Light SW
A 4
R
RB
L–B
V–W
3B
3B
74
94
3A
3A
114
114
3B
3B
77
97
3B
3B
99
119
W
3B
87 3B
107
3A
92
3A
82
W
Y–
B
W–
L
Y
L–B
W
4
2
5
6
1
MT2
MT4
MTL
NSSL
NSSD
3
MTD
Transmission
Control SW
T 8
Combination Meter
C 7(A), C 8(B)
W
W
W
W
W
W
L
2
3
4
D
N
R
P
83
10A
GAUGE2
2B
6
10A
GAUGE1
2M
1
From Power Source System (See Page 56)
A
40
IA
W
W
W–
B
* 1 : w/ VSC
* 2 : w/o VSC
IL2
3
W
A
21
1 A
SB
3A
87
57 3A
3B
3B
54
74
3B
3B
64
84
(* 2)
(* 1)
(* 2)
(* 1)
3A
55
85 3A
ID
BR
2R
8
8 2M
SB
BR
SB
W
Combination Meter
C 7(A), C 8(B)
L–
W
B
10
(*2
)
5
Skid Control ECU
with Actuator
S 1
A
33
S
peedom
et
er
R–L
W
IF7
12
L–
W
(*2
)
R–
L
Power
PN
Micro Computer
84
Electronically Controlled Transmission and A/T Indicator
Previous automatic transaxle have selected each gear shift using mechanically controlled throttle hydraulic pressure,
governor hydraulic pressure and lock–up hydraulic pressure. The electronically controlled transmission, however, electrically
controls the line pressure, throttle pressure, lock–up pressure and accumulator pressure etc. through the solenoid valve. The
electronically controlled transmission is a system which precisely controls gear shift timing and lock–up timing in response to
the vehicle’s driving conditions and the engine condition detected by various sensors. It makes smooth driving possible by
shift selection for each gear which is the most appropriate to the driving conditions at that time, and by preventing downing,
squat and gear shift shock when starting off.
1. Gear Shift Operation
When driving, the engine warm up condition is input as a signal to TERMINAL THW of the engine control module from the
engine coolant temp. sensor and the vehicle speed signal is input to TERMINAL SPD of the engine control module. At the
same time, the throttle valve opening signal from the throttle position sensor is input to TERMINALS VTA1 and VTA2 of the
engine control module as throttle angle signal.
Based on these signals, the engine control module selects the best shift position for the driving conditions and sends current
to the electronically controlled transmission solenoid.
2. Lock–Up Operation
When each signal makes engine control module recognize that LOCK–UP condition is satisfied, the current flows from
engine control module TERMINAL DSL to electronically controlled transmission solenoid TERMINAL DSL. At the same time,
the current flows engine control module TERMINAL SL1+ to electroically controlled transmission solenoid TERMINAL SL1+
and from TERMINAL SL1– to engine control module TERMINAL SL1–. This works LOCK–UP solenoid to perform
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. The engine control module operates and cuts the current to the solenoid to release lock–up.
E6 (A), E7 (B), E8 (C), E9 (D), E10 (E) Engine Control Module
L–E1 : 10.0–14.0 volts (Ignition SW on and shift lever at L position)
2–E1 : 10.0–14.0 volts (Ignition SW on and shift lever at 2 position)
R–E1 : 10.0–14.0 volts (Ignition SW on and shift lever at R position)
D–E1 : 10.0–14.0 volts (Ignition SW on and shift lever at D position)
THO–E2 : Below 1.0 volts (Ignition SW on and AFT temperature 110
°
C (230
°
F)
A4 A/T Indicator Light SW
3–1 : Closed with shift lever in P position
3–2 : Closed with shift lever in R position
3–5 : Closed with shift lever in N position
3–7 : Closed with shift lever in D position
3–8 : Closed with shift lever in L position
3–4 : Closed with shift lever in 2 position
: Parts Location
Code
See Page
Code
See Page
Code
See Page
A4
E6
A
S1
C1
E7
B
S13
C7
A
E8
C
T3
C8
B
E9
D
T4
E1
A
E10
E
T8
E2
B
I14
E3
J11
: Relay Blocks
Code
See Page
Relay Blocks (Relay Block Location)
1
Engine Room R/B (Engine Compartment Left)
System Outline
Service Hints
85
: Junction Block and Wire Harness Connector
Code
See Page
Junction Block and Wire Harness (Connector Location)
1B
1C
Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
1J
g
g
(
g
)
1K
Engine Wire and Engine Room J/B (Engine Compartment Left)
1L
Engine Wire and Engine Room J/B (Engine Compartment Left)
2A
Instrument Panel Wire and Driver Side J/B (Lower Finish Panel)
2B
Instrument Panel Wire and Driver Side J/B (Lower Finish Panel)
2E
Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)
2G
Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)
2L
2M
Instrument Panel Wire and Driver Side J/B (Lower Finish Panel)
2R
(
)
3A
3A
Instrument Panel Wire and Passenger Side J/B (Instrument Panel Brace RH)
3B
Instrument Panel Wire and Passenger Side J/B (Instrument Panel Brace RH)
3B
: Connector Joining Wire Harness and Wire Harness
Code
See Page
Joining Wire Harness and Wire Harness (Connector Location)
IF5
IF6
Engine Room Main Wire and Instrument Panel Wire (Right Side of Steering Column Tube)
IF7
g
( g
g
)
IK1
Instrument Panel Wire and Instrument Panel Wire (Instrument Panel Reinforcement RH)
IL1
Engine Wire and Instrument Panel Wire (Behind the Glove Box)
IL2
Engine Wire and Instrument Panel Wire (Behind the Glove Box)
: Ground Points
Code
See Page
Ground Points Location
ED
Left Fender
EE
Left Side of Cylinder Head
EF
Intake Side of Cylinder Block
IA
Instrument Panel Reinforcement LH
ID
Instrument Panel Brace RH
: Splice Points
Code
See Page
Wire Harness with Splice Points
Code
See Page
Wire Harness with Splice Points
I2
Engine Room Main Wire
I6
Engine Wire
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