ELECTRONICALLY CONTROLLED TRANSMISSION

7. 5A 15A 15A
IGN EFI STOP

17 1C 2 1 1C

6
B–Y B–Y B–G
EB2 2 2

G–R
(REAR WHEEL ABS) (REAR WHEEL ABS)
1 5

B–G
12
B–Y B–Y
IB3
(4 WHEEL ABS) (4 WHEEL ABS) EFI MAIN
RELAY 2

STOP LIGHT
2 3 1 EB2
W–B
2

SW
S7
2

W–R
1
BR–B BR–B 1
I15

THROTTLE
POSITION

G–W
3 EB2

B–G
SENSOR
BR–B

BR–B

ENGINE COOLANT TEMP. SENSOR

I15 : CANADA

W–R
T1
E23 : USA

2 3 4
(EFI WATER TEMP. SENSOR)

1 A (* 1)
BR–B

1 B (* 2)
G–Y 16 IH1 10 IH1 5 IH1
Y–W

G–B
(* 1)

(* 2)
Y–L
(* 1)

(* 2)

Y
A , B

G–W
W–R

B–G
2 A (* 1)
2 B (* 2)
G–L

E4

9 A 4 A 12 A 11 A 1 A 12 B 1 B 6 B
E2 THW VCC (* 2)
IDL +B VTA BATT STP
VC (* 1)
E6 B , E7 A , E8 C ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU)
OD1 S1 S2 S3 S4 SP2 TH01 TH02 E1 DG T TE2
21 B 7 C 6 C 5 C 4 C 16 C (* 1) 7 A 14 A 11 C (* 1) 20 B 15 A 16 A (* 1)
19 C (* 2) 14 C (* 2) 14 A (* 2)
R–W
L–R

BR–R

Y–W

V–W
G–R
R–G

G–B

V–G
Y–R

Y–B

BR
LG
B

V
L

R–W
I5
(* 2)
B
I5
(* 1)

21 IH1 9 IH2
L–R (* 2)

(* 1)

R–W (* 2)

(* 1)

(* 2)

(* 1)

(* 1)

(* 2)

(* 1)

(* 4)

(* 4)

(* 2)

(* 1)
AND VEHICLE SPEED SENSOR (SPEED SENSOR)

B
R–G
Y–R

TRANSFER FLUID TEMP. SENSOR

DATA LINK CONNECTOR 1

(FOR ELECTRONICALLY CONTROLLED

6 A (* 4)
(CHECK CONNECTOR)

3 A 2 A 1 A 5 A
1 B 2 B 3 B 2 C (* 5) 1 4 A 17 6
CRUISE CONTROL ECU

ELECTRONICALLY CONTROLLED

OIL TEMP. SENSOR

DG T
B , E3 A , V 2 C

TRANSMISSION SOLENOID

(FOR 4WD, A/T)

NO. 1

NO. 2

NO. 3

NO. 4

(* 3)

E1 TE2
2 5 A 3 7
D1
TRANSMISSION)

I 7 A
O3

(* 1)
TO

BR–B

BR–B
(* 4)

BR

1 C (* 5)
4 A (* 4)
E2

BR–B BR
E12 I15
W–B

(* 1)

BR–B BR–B
I15 I15
BR

BR (* 2)
EC : 3VZ–E
ED : 22R–E
EB

142
 *1 : 3VZ–E
*2 : 22R–E * 4 : 3VZ–E (4WD)
*3 : VEHICLE SPEED SENSOR (SPEED SENSOR) * 5 : 3VZ–E (2WD), 22R–E

10A
GAUGE

9 I16
INTEGRATION
RELAY
9 I12 : USA
I 8 : CANADA
B–O

B–O B–O
I11 I9

B–O
ELECTRONICALLY CONTROLLED
B–O

TRANSMISSION PATTERN
8 IH2
B–O

B–O

B–O
PWR NORM
P1

SELECT SW
PARK/NEUTRAL POSITION SW
4 (NEUTRAL START SW)
2
I 4 : USA

G–O
G–O I11 : CANADA

E5
18
R–L G–O
N 2 L IH2

10 2 3 20
(3VZ–E)

(22R–E)

G–L C11 D , C12 A

G–O
IH1
C13 C , C1 4 B
V–W
P–G
V–R

G–L

8 B 6 A 2 B COMBINATION METER 4 D

A/T OIL TEMP.

19 C (* 1) 18 C (* 1) 17 C (* 1)

O/D OFF
PWR
23 C (* 2) 22 C (* 2) 21 C (* 2) 7 B 9 B
4WD

(* 3)
N 2 L PWR SP1
E6 B , E7 A , E 8 C ENGINE CONTROL MODULE (ENGINE
AND ELECTRONICALLY CONTROLLED
L4 4WD TRANSMISSION ECU) OD2 OIL
20 C (* 1) 8 B 16 B 4 B 12 D 12 B 10 B 4 B 7 C
19 B (* 2)
G–W
P–G
(* 2)

(* 1)

W–B
G–R
L–W
Y–G

V–G

Y–G
BR
Y–R
R

P–G 4 IH1
(* 4)

E 4 : 3VZ–E 1
Y–G
(* 2)

(* 1)

E15 : 22R–E
IH2
P–G
(* 2)

G–W

I8
(* 1)

L–W
(* 5)
Y–G

1 A 2 A (* 1)
2 B (* 2) 1 1 1
ADD DETECTION SW

1 C
OIL TEMP. SW

10 IH2
I7 A

L4 H4
O/D MAIN SW
(FOR TRANSFER, A/T)

2WD
I5 C ,

(W/ ADD)

O2

3 A (* 4)
O4

2 3
INDICATOR SW

A5

2 C 1 B (* 2)
I 4 B ,

W–B
W–B
(* 4)

G–Y
W–B (* 2)

W–B (* 2)

1
W–B W–B W–B
E12 IH1 I8

IE

143
ELECTRONICALLY CONTROLLED TRANSMISSION
SYSTEM OUTLINE
PREVIOUS AUTOMATIC TRANSMISSIONS 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 AND LOCK–UP PRESSURE ETC,
THROUGH THE SOLENOID VALVE, ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY 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 SP2 OF THE ENGINE
CONTROL MODULE (ECU) FROM THE VEHICLE SPEED SENSOR (SPEED SENSOR) DEVOTED TO THE ELECTRONICALLY
CONTROLLED TRANSMISSION. CURRENT IS THEN OUTPUT TO THE ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOIDS.
WHEN SHIFTING TO 1ST SPEED, CURRENT FLOWS FROM TERMINAL S1 OF THE ENGINE CONTROL MODULE (ECU) → TERMINAL
(A) 3 (3VZ–E 4WD) OR TERMINAL (B) 1 (3VZ–E 2WD, 22R–E) OF THE ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOIDS →
TERMINAL (C) 1 (3VZ–2 2WD, 22R–E) → 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 (3VZ–E 4WD)
OR TERMINAL (B) 1 (3VZ–E 2WD, 22R–E) OF THE ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOIDS → TERMINAL (C) 1
(3VZ–E 2WD, 22R–E) → GROUND, AND FROM TERMINAL S2 OF THE ENGINE CONTROL MODULE (ECU) → TERMINAL (A) 2 (3VZ–E
4WD) OR TERMINAL (B) 2 (3VZ–E 2WD, 22R–E) OF THE ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOIDS → TERMINAL
(C) 1 (3VZ–E 2WD, 22R–E) → 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 S3 OF THE ENGINE CONTROL MODULE (ECU) → TERMINAL (A) 1 (3VZ–E 4WD) OR
TERMINAL (B) 3 (3VZ–E 2WD, 22R–E) OF THE LOCK–UP SOLENOID → TERMINAL (C) 1 (3VZ–E 2WD, 22R–E) → GROUND, CAUSING
CONTINUITY TO THE LOCK–UP SOLENOID AND CAUSING LOCK–UP OPERATION.

3. TRANSFER SHIFT OPERATION (H4–L4)

WHEN THE TRANSFER SHIFT LEVER IS MOVED TO H4 POSITION, THE CURRENT FROM THE GAUGE FUSE FLOWS TO THE 4WD
INDICATOR LIGHT → TERMINAL 2 OF ADD INDICATOR SW → TERMINAL 1 → TERMINAL (A) 2 (3VZ–E 4WD) OR TERMINAL (B) 2
(22R–E 4WD) OF THE INDICATOR SW → TERMINAL (A) 3 (3VZ–E 4WD) OR TERMINAL (B) 1 (22R–E 4WD) → GROUND SO THAT THE
INDICATOR LIGHT LIGHTS UP AND SHIFT TO H4 OCCURS.
IF THE LEVER IS NEXT MOVED TO L4 POSITION, THE INDICATOR LIGHT OPERATES THE SAME AS WITH H4, CAUSING THE LIGHT TO
CAME ON. AT THE SAME TIME, A SIGNAL IS INPUT TO TERMINAL L4 OF THE ENGINE CONTROL MODULE (ECU). ACCORDINGLY,
WHEN THE ENGINE CONTROL MODULE (ECU) DECIDES THAT DRIVING IN L4 IS POSSIBLE, CURRENT FLOWS FROM TERMINAL S4
OF THE ENGINE CONTROL MODULE (ECU) → TERMINAL (A) 5 (3VZ–E 4WD) OF THE ELECTRONICALLY CONTROLLED
TRANSMISSION SOLENOID → GROUND AND SHIFT TO L4 OCCURS.

4. 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.

5. OVERDRIVE CIRCUIT
* O/D MAIN SW ON
WHEN THE O/D MAIN SW IS TURNED ON, 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 OVERDRIVE 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.

144
6. ELECTRONICALLY CONTROLLED TRANSMISSION PATTERN SELECT SW CIRCUIT
IF THE ELECTRONICALLY 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 PWR 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.

7. A/T. OIL TEMP. WARNING

* TRANSMISSION SIDE
WHEN THE OIL TEMP. SENSOR AFFIXED TO THE TRANSMISSION CASE DETECTS THAT THE FLUID TEMP. IS 150°C (302°F) OR
MORE, THE ENGINE CONTROL MODULE (ECU) OPERATES AND THE CURRENT FLOWING THROUGH THE GAUGE FUSE FLOWS TO
THE A/T. OIL TEMP. WARNING LIGHT → TERMINAL OIL OF THE ENGINE CONTROL MODULE (ECU) → GROUND SO THAT THE
WARNING LIGHT LIGHTS UP, INFORMING THAT THE FLUID TEMP. IS HIGH. WHEN THE FLUID TEMP. DROPS TO 120°C (248°F) OR
LESS, THE ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) STOPS OPERATING
AND THE WARNING LIGHT GOES OUT.
* TRANSMISSION SIDE (22R–E)
WHEN THE OIL TEMP. SENSOR AFFIXED TO THE TRANSMISSION CASE DETECTS THAT THE FLUID TEMP. IS 150°C (302°F) OR
MORE, THE TCCS ECU OPERATES AND THE CURRENT FLOWING THROUGH THE GAUGE FUSE FLOWS TO THE A/T. OIL TEMP.
WARNING LIGHT → TERMINAL 1 OF THE OIL TEMP. SW → GROUND SO THAT THE WARNING LIGHT LIGHTS UP, INFORMING THAT
THE FLUID TEMP. IS HIGH. WHEN THE FLUID TEMP. DROPS TO 120°C (248°F) OR LESS, THE ENGINE CONTROL MODULE (ENGINE
AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU) STOPS OPERATING AND THE WARNING LIGHT GOES OUT.
* TRANSFER SIDE (FOR 3VZ–E)
WHEN THE TRANSFER FLUID TEMP. SENSOR AFFIXED TO THE TRANSFER CHAIN CASE DETECTS THAT THE FLUID TEMP. IS 125°C
(257°F) OR HIGHER, THE ENGINE CONTROL MODULE (ECU) OPERATES AND THE CURRENT FLOWING THROUGH THE GAUGE
FUSE FLOWS TO THE A/T. OIL TEMP. WARNING LIGHT → TERMINAL OIL OF THE ENGINE CONTROL MODULE (ECU) → GROUND
SO THAT THE WARNING LIGHT LIGHTS UP, INFORMING THAT THE FLUID TEMP. IS HIGH. WHEN THE FLUID TEMP. DROPS TO 115°C
(239°F) OR LESS, THE ENGINE CONTROL MODULE (ECU) STOPS OPERATING AND THE WARNING LIGHT GOES OUT.

SERVICE HINTS
E 6(B), E 7(A), E 8(C) ENGINE CONTROL MODULE (ENGINE AND ELECTRONICALLY CONTROLLED TRANSMISSION ECU)
S1 –E1: 9.0–14.0 VOLTS
S4 –E1: 0 VOLTS WITH TRANSFER GEAR AT H2 OR H4 POSITION
9.0–14.0 VOLTS WITH TRANSFER SHIFT AT L4 POSITION
PWR –E1: 7.5–14.0 VOLTS WITH PATTERN SELECT SW AT PWR POSITION
BELOW 1.5 VOLTS WITH PATTERN SELECT SW AT NORM POSITION
STP –E1: 7.5–14.0 VOLTS WITH BRAKE PEDAL DEPRESSED
BELOW 1.5 VOLTS WITH BRAKE PEDAL RELEASED
THW –E2: 0.2–1.0 VOLTS WITH COOLANT TEMP. 80°C (176°F)
THO1 –E2, THO2 –E2: 4–5 VOLTS WITH FLUID TEMP. 20°C (68°F)
IDL –E2: BELOW 1.5 VOLTS WITH THROTTLE VALVE FULLY CLOSED
9.0–14.0 VOLTS WITH THROTTLE VALVE OPEN
VTA –E2: 0.3–0.8 VOLTS WITH THROTTLE VALVE FULLY CLOSED
3.2–4.9 VOLTS WITH THROTTLE VALVE FULLY OPEN
VCC –E2: 4.5–5.5 VOLTS WITH IGNITION SW ON
OD1 –E1: 4.5–5.5 VOLTS WITH IGNITION SW ON
OD2 –E1: 9.0–14.0 VOLTS O/D MAIN SWITCH TURNED ON
BELOW 3.0 VOLTS O/D MAIN SWITCH TURNED OFF
N –E1: 7.5–14.0 VOLTS WITH SHIFT LEVER AT N POSITION
BELOW 1.5 VOLTS WITH SHIFT LEVER AT EXCEPT N POSITION
2 –E1: 7.5–14.0 VOLTS WITH SHIFT LEVER AT 2 POSITION
BELOW 1.5 VOLTS WITH SHIFT LEVER AT EXCEPT 2 POSITION
L –E1: 7.5–14.0 VOLTS WITH SHIFT LEVER AT L POSITION
BELOW 1.5 VOLTS WITH SHIFT LEVER AT EXCEPT L POSITION
L4 –E1: 7.5–14.0 VOLTS WITH TRANSFER SHIFT AT H2 OR H4 POSITION
BELOW 1.5 VOLTS WITH TRANSFER SHIFT AT L4 POSITION
OIL –E1: 9.0–14.0 VOLTS
+B –E1: 9.0–14.0 VOLTS
BATT –E1: 9.0–14.0 VOLTS

145
ELECTRONICALLY CONTROLLED TRANSMISSION
SERVICE HINTS
E 3 ELECTRONICALLY CONTROLLED TRANSMISSION SOLENOID
1,2,3,5–GROUND: APPROX. 11–15 Ω (3VZ–E)
1,2,3–GROUND : APPROX. 11–15 Ω (22R–E)
E 5 ELECTRONICALLY CONTROLLED TRANSMISSION PATTERN SELECT SW
3–GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION
P 1 PARK/NEUTRAL POSITION SW (NEUTRAL START SW)
9–GROUND : APPROX. 12 VOLTS WITH IGNITION SW AT ON POSITION
O 4 O/D MAIN SW
3–1: OPEN WITH O/D MAIN SW AT ON POSITION
CLOSED WITH O/D MAIN SW AT OFF POSITION
S 7 STOP LIGHT SW
1–2: CLOSED WITH BRAKE PEDAL DEPRESSED

: PARTS LOCATION
CODE SEE PAGE CODE SEE PAGE CODE SEE PAGE
24 (3VZ–E) A 24 (3VZ–E) O3 25 (3VZ–E)
A5 E4
26 (22R–E) B 26 (22R–E) O4 28
C11 D 28 E5 28 25 (3VZ–E)
P1
C12 A 28 E6 B 28 27 (22R–E)
C13 C 28 E7 A 28 S7 28
C14 B 28 E8 C 28 25 (3VZ–E)
T1
24 (3VZ–E) I4 B 27 (22R–E) 27 (22R–E)
D1
26 (22R–E) I5 C 27 (22R–E) 25 (3VZ–E)
V2 C
24 (3VZ–E) I7 A 25 (3VZ–E) 27 (22R–E)
E2 B
26 (22R–E) I16 28
E3 A 24 (3VZ–E) O2 27 (22R–E)

: RELAY BLOCKS
CODE SEE PAGE RELAY BLOCKS (RELAY BLOCK LOCATION)
2 22 R/B NO. 2 (ENGINE COMPARTMENT RIGHT)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

CODE SEE PAGE JUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)
1C 20 COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CODE SEE PAGE JOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
30 (3VZ–E)
EB2 COWL WIRE AND ENGINE ROOM MAIN WIRE (R/B NO
NO. 2)
32 (22R–E)
IB3 34 ENGINE ROOM MAIN WIRE AND COWL WIRE (LEFT KICK PANEL)
IH1
34 ENGINE WIRE AND COWL WIRE (RIGHT KICK PANEL)
IH2

: GROUND POINTS
CODE SEE PAGE GROUND POINTS LOCATION
30 (3VZ–E)
EB LEFT FENDER
32 (22R–E)
EC 30 (3VZ–E) RH CYLINDER HEAD COVER REAR
ED 32 (22R–E) INTAKE MANIFOLD
IE 34 LEFT KICK PANEL

: SPLICE POINTS
CODE SEE PAGE WIRE HARNESS WITH SPLICE POINTS CODE SEE PAGE WIRE HARNESS WITH SPLICE POINTS
E4 30 (3VZ–E) I8
E12 I9
32 (22R–E)
(22R E) 34 COWL WIRE
E15 ENGINE WIRE I11
E23 30 (3VZ–E) I12
I4 34 I15 34 ENGINE WIRE
I5 34 COWL WIRE

146
147