Lexus ES300 (1997 year). Manual — part 646
178
ELECTRONICALLY CONTROLLED TRANSMISSION
B
9
B
10
C
2
C
1
B
14
B
12
B
15
IG
IK2
5
IK2
6
IK2
9
IL1
1
IK3
3
IK2
4
IJ1
16
IJ1
13
IJ1
14
IJ1
15
A
A
A
L–W
R–B
R–B
R–L
W–B
Y
L–W
B–
R
R
R–
B
G–
W
Y
L–
W
B–
R
Y
L–W
B–
R
R
R–
B
G–
W
W–
B
W–
B
COMBINATION METER
C
C 8
, C 9
B
D
, C10
JUNCTION
CONNECTOR
J16
P 1
JU
NCT
IO
N
CO
NN
E
C
T
O
R
J
J
UNC
T
IO
N
C
O
NNE
CT
O
R
L
2
D
N
R
P
Y
L–W
B–
R
R
R–
B
G–
W
W–B
R–B
R–B
L–W
Y
R–L
G–
W
J
UNCT
IO
N
CO
NNE
CT
O
R
J3
0
B
B
E
E
E
J3
0
LL
2L
DL
NL
RL
PL
4
3
10
9
8
7
2
A/T INDICATOR LIGHT SW
[PARK/NEUTRAL POSITION SW]
C
D
A
D
A
30
D
1V
5
1H
10
179
AND A/T INDICATOR
PREVIOUS AUTOMATIC TRANSAXLE HAVE SELECTED EACH GEAR SHIFT USING THE MECHANICALLY CONTROLLED THROTTLE
HYDRAULIC PRESSURE, GOVERNOR HYDRAULIC PRESSURE AND LOCK–UP HYDRAULIC PRESSURE. THE ELECTRONICALLY
CONTROLLED TRANSMISSION HOWEVER, ELECTRICALLY CONTROLS THE LINE PRESSURE AND LOCK–UP PRESSURE ETC.,
THROUGH THE SOLENOID VALVE. ENGINE CONTROL MODULE CONTROL OF THE SOLENOID VALVE BASED ON THE INPUT
SIGNAL 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 SELECTS THE SHIFT FOR EACH GEAR WHICH IS MOST APPROPRIATE TO THE
DRIVING CONDITIONS, BASED ON INPUT SIGNALS FROM THE ENGINE COOLANT TEMP. SENSOR TO TERMINAL THW OF THE
ENGINE CONTROL MODULE, AND ALSO THE INPUT SIGNALS TO TERMINAL NC2+ OF THE ENGINE CONTROL MODULE FROM THE
VEHICLE SPEED SENSOR DEVOTED TO THE ELECTRONICALLY CONTROLLED TRANSMISSION. CURRENT IS THEN OUTPUT TO
THE ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOID. WHEN SHIFTING TO 1ST SPEED, CURRENT FLOWS FROM
TERMINAL S1 OF THE ENGINE CONTROL MODULE
→
TERMINAL 3 OF THE ELECTRONICALLY CONTROLLED TRANSMISSION
SOLENOID
→
GROUND, AND CONTINUITY TO THE NO. 1 SOLENOID CAUSES THE SHIFT.
FOR THE 2ND SPEED, CURRENT FLOWS FROM TERMINAL S OF THE ENGINE CONTROL MODULE
→
TERMINAL 3 OF THE
ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOID
→
GROUND, AND FROM TERMINAL S2 OF THE ENGINE CONTROL
MODULE
→
TERMINAL 6 OF THE ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOID
→
GROUND, AND CONTINUITY TO
SOLENOID NO. 1 AND NO. 2 CAUSES THE SHIFT.
FOR THE 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 JUDGES FROM EACH SIGNAL THAT LOCK–UP OPERATION CONDITIONS HAVE BEEN MET,
CURRENT FLOWS FROM TERMINAL SL OF THE ENGINE CONTROL MODULE
→
TERMINAL 2 OF THE ELECTRONICALLY
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, THE ENGINE CONTROL MODULE OPERATES AND CONTINUITY TO THE
LOCK–UP SOLENOID IS CUT.
4. OVERDRIVE CIRCUIT
∗
OVERDRIVE 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 AND ENGINE CONTROL MODULE OPERATION CAUSES GEAR SHIFT WHEN THE
CONDITIONS FOR OVERDRIVE ARE MET.
∗
OVERDRIVE OFF
WHEN THE O/D MAIN SW IS TURNED TO OFF (O/D OFF INDICATOR LIGHT TURNS ON), 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 AND ENGINE
CONTROL MODULE OPERATION PREVENTS SHIFT INTO OVERDRIVE.
SYSTEM OUTLINE
A
B
C
D
180
ELECTRONICALLY CONTROLLED TRANSMISSION
E 7 , E 8 ,E 9 ,E10 ENGINE CONTROL MODULE
S1, S2–E1 : 9.0–14.0 VOLTS WITH THE SOLENOID ON
0–1.5 VOLTS WITH SOLENOID OFF
L–E1 : 7.5–14.0 VOLTS WITH THE IGNITION SW ON AND SHIFT LEVER AT L POSITION
2–E1 : 7.5–14.0 VOLTS WITH THE IGNITION SW ON AND SHIFT LEVER AT 2 POSITION
R–E1 : 7.5–14.0 VOLTS WITH THE IGNITION SW ON AND SHIFT LEVER AT R POSITION
STP–E1 : 9.0–14.0 VOLTS WITH THE IGNITION SW ON AND BRAKE PEDAL DEPRESSED
THW–E2 : 0.2–1.0 VOLTS WITH THE ENGINE COOLANT TEMP. 60
C (140
F) –120
C (248
F)
VTA1–E2 : 0.3–0.8 VOLTS WITH THE IGNITION SW ON AND THROTTLE VALVE FULLY CLOSED
3.2–4.9 VOLTS WITH THE IGNITION SW ON AND THROTTLE VALVE FULLY OPENED
VC–E2 : 4.5–5.5 VOLTS WITH THE IGNITION SW AT ON POSITION
OD1–E1 : 4.5–5.5 VOLTS WITH THE IGNITION SW AT ON POSITION
0D2–E1 : 9.0–14.0 VOLTS WITH THE IGNITION SW ON AND O/D MAIN SW TURNED OFF
0–3.0 VOLTS WITH THE IGNITION SW ON AND O/D MAIN SW TURNED ON
+B–E1 : 9.0–14.0 VOLTS WITH THE IGNITION SW AT ON POSITION
0 2 O/D MAIN SW
2–4 : CLOSED WITH THE O/D MAIN SW OFF, OPEN WITH THE O/D MAIN SW ON
: PARTS LOCATION
CODE
SEE PAGE
CODE
SEE PAGE
CODE
SEE PAGE
C 8
B
28
E10
D
28
J28
A
29
C 9
C
28
J 4
29
J29
B
29
C10
D
28
J 7
29
J30
29
C14
28
J16
29
O 2
29
E 3
26
J17
29
P 1
27
E 4
26
J24
29
S10
29
E 7
A
28
J25
29
T 2
27
E 8
B
28
J26
29
V 2
27
E 9
C
28
J27
29
V 3
27
,,,
,,,
,,,
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CODE
SEE PAGE
JUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1C
24
COWL WIRE AND INSTRUMENT PANEL J/B (LOWER FINISH PANEL)
1D
24
INSTRUMENT PANEL WIRE AND INSTRUMENT PANEL J/B (LOWER FINISH PANEL)
1H
24
INSTRUMENT PANEL WIRE AND INSTRUMENT PANEL J/B (LOWER FINISH PANEL)
1J
1R
24
COWL WIRE AND INSTRUMENT PANEL J/B (LOWER FINISH PANEL)
1V
24
COWL WIRE AND INSTRUMENT PANEL J/B (LOWER FINISH PANEL)
1W
2C
20
ENGINE ROOM MAIN WIRE AND ENGINE ROOM J/B (ENGINE COMPARTMENT LEFT)
2F
20
ENGINE ROOM MAIN WIRE AND ENGINE ROOM J/B (ENGINE COMPARTMENT LEFT)
2J
20
COWL WIRE AND ENGINE ROOM J/B (ENGINE COMPARTMENT LEFT)
2K
20
COWL WIRE AND ENGINE ROOM J/B (ENGINE COMPARTMENT LEFT)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODE
SEE PAGE
JOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
IJ1
38
INSTRUMENT PANEL WIRE AND COWL WIRE (UNDER THE GLOVE BOX)
IK2
38
ENGINE WIRE AND COWL WIRE (UNDER THE GLOVE BOX)
IK3
38
ENGINE WIRE AND COWL WIRE (UNDER THE GLOVE BOX)
IL1
38
ENGINE WIRE AND INSTRUMENT PANEL WIRE (UNDER THE GLOVE BOX)
: GROUND POINTS
CODE
SEE PAGE
GROUND POINTS LOCATION
EC
34
LEFT RADIATOR SIDE SUPPORT
ED
34
SURGE TANK RH
EE
34
REAR SIDE OF SURGE TANK
IG
36
LEFT KICK PANEL
IJ
36
INSTRUMENT PANEL BRACE RH
: SPLICE POINTS
CODE
SEE PAGE
WIRE HARNESS WITH SPLICE POINTS
CODE
SEE PAGE
WIRE HARNESS WITH SPLICE POINTS
I 5
38
ENGINE WIRE
SERVICE HINTS
181
AND A/T INDICATOR
10
9
5
12
14 15
10
9
X
2
1
13
4
3
6
13 14
1
2
3
4 X 6
2
1
X X X
X X
X 3 X
11
27
X
X 33 34
X
X
17
X
X
1 2 X 4
7
X
22
20
9 X
X
X
16
14 15
X X
1
X
6 7
10
11
12
X 23 24
D D D
C C C
A A A
A A
A A A A A A A A
C C
C C
A A
A A
A A A A A A A
X
A
A A X X X
A
A A
B B
D D X X
B B
X X F F
A A A A A
B B B B
D D D E E E
2
4
X
7
2
3
4
8
9 10
1
2
1 2 3
1 2
3
1
2
B
C 8
C GRAY
C 9
D BROWN
C10
D
E10
C
E 9
B
E 8
A
E 7
A
J28
B
J29
C14
E 3 GRAY
E 4 DARK GRAY
J 4 BLACK
J 7
J25
J24
J17 BLUE
J16 ORANGE
J26
J30
S10
P 1 GRAY
O 2 BLUE
V 3 BLACK
V 2 BLACK
T 2 BLACK
X
X
28
A A A A A
BLUE
C C
A A
J27
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