1998 TOYOTA LAND CRUISER Factory Repair Manual

change wheel air filter inflation pressure start stop button recommended oil seats

Page 2225 of 3115

TOYOTA LAND CRUISER 1998 Factory Repair Manual 2004 LAND CRUISER (EWD548U)
218Electronically Controlled Transmission and A/T Indicator
Previous automatic transmissions have selected each gear shift using mechanically controlled throttle hydraulic

2004 LAND CRUISER (EWD548U)
218Electronically Controlled Transmission and A/T Indicator
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, 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 from vehicle speed sensor is input to TERMINAL SP2+ 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. Line Hydraulic Pressure Control
The engine control module adjusts the line hydraulic pressure to the optimal level by controlling TERMINAL SLT+ of the
module according to the engine torque data. This realizes the smooth gear shifting.
3. High Response Gear Shifting Control
The engine control module performs the high response engine torque up control to control the ignition-timing lag as well as
opening the electronic throttle when shifting down. By doing this, the gear shifting is performed in a short period of time.
Moreover, the engine control module uses the orifice switching control, which optimizes the speed of applying and reducing
the hydraulic pressure. And it realizes the fine shifting condition by applying and reducing hydraulic pressure slowly when
the gear shifting shock is important and quickly when the high response is required.
4. Clutch Hydraulic Pressure Control
The engine control module controls the clutch operation in the optimal timing and with the best hydraulic pressure according
to the engine torque data and the number of the clutch revolution
5. Lock-Up and Flexible Lock-Up Control
The engine control module carries out the lock-up control by controlling the TERMINAL SLU+ of the module according to
the shift position, vehicle speed, throttle opening degree and running conditions. The engine control module also steadily
keeps applying the lock-up clutch a delicate slippage to improve the transmission efficiency (Fuel efficiency) of the torque
converter.
6. 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.
7. Ai-Shift Control
The engine control module judges whether the road is downslope or upslope by detecting the throttle opening degree or the
vehicle's speed. Moreover it can expect the winding roads by detecting the turning condition of the vehicle. The engine
control module keeps unnecessary shifting up from the fourth gear from operating and carries out the automatic shifting
down to the third gear in order to control the vehicle running according to the road conditions. The engine control module
also reads the driver's intention during driving from his (her) accelerating operation and the running conditions of the vehicle.
As a result of that, ideal shifting patters for each driver are automatically selected without any switching operations.
8. Electronically Controlled Transmission Pattern Select SW Circuit
When the electronically controlled transmission pattern select SW is switched to PWR, a signal is input to TERMINAL PWR
of the engine control module. This enables shift-up and shift-down at a higher speed range.
9. Transfer Shift Operation
When the transfer shift lever is moved to L position, a signal is input into TERMINAL L4 of the engine control module.
In addition when the transfer shift lever is moved to N position a signal is input to engine control module TERMINAL TFN.
The engine control module detects the transfer condition through this.
System Outline

Page 2226 of 3115

TOYOTA LAND CRUISER 1998 Factory Repair Manual 2004 LAND CRUISER (EWD548U)
219
E4 Electronically Controlled Transmission Pattern Select SW
5-3 : Closed with select SW at PWR position
2-3 : Closed with select SW at 2nd position
E7 (C), E9 (E) Eng

Page 2227 of 3115

TOYOTA LAND CRUISER 1998 Factory Repair Manual 2004 LAND CRUISER (EWD548U)
220Electronically Controlled Transmission and A/T Indicator
:Junction Block and Wire Harness Connector
CodeSee PageJunction Block and Wire Harness (Connector Location)
1A24

2004 LAND CRUISER (EWD548U)
220Electronically Controlled Transmission and A/T Indicator
:Junction Block and Wire Harness Connector
CodeSee PageJunction Block and Wire Harness (Connector Location)
1A24Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
1B24Engine Room No.2 Wire and Engine Room J/B (Engine Compartment Left)
2A28Engine Room No.2 Wire and Cowl Side J/B LH (Left Kick Panel)
2D28Dash Wire and Cowl Side J/B LH (Left Kick Panel)2E28Dash Wire and Cowl Side J/B LH (Left Kick Panel)
2Q30Instrument Panel Integration Wire and Cowl Side J/B LH (Left Kick Panel)
3E40
3M43Dash Wire and Cowl Side J/B RH (Right Kick Panel)
3P43(g )
3Q42Instrument Panel Integration Wire and Cowl Side J/B RH (Right Kick Panel)
4A
4C
4D52Dash Wire and J/B No.4 (Instrument Panel Center)
4E
()
4F
5C56Dash Wire and J/B No.5 (Behind the Combination Meter)
5D56Engine Room No.2 Wire and J/B No.5 (Behind the Combination Meter)
6C60Dash Wire and J/B No.6 (Behind the Grove Box)
6D60Engine Wire and J/B No.6 (Behind the Grove Box)
7B64Dash Wire and J/B No.7 (Behind the Grove Box)
7D64Engine Room No.2 Wire and J/B No.7 (Behind the Grove Box)
:Connector Joining Wire Harness and Wire Harness
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
EB1
EB276Engine Wire and Transmission Wire (On the Transmission)
EB3
g()
IG178Engine Room No.2 Wire and Dash Wire (Behind the Combination Meter)
IN280Engine Wire and Dash Wire (Behind the Glove Box)
IU182Instrument Panel Integration Wire and Dash Wire (Behind the Glove Box)
IX182Instrument Panel Integration Wire and Engine Wire (Behind the Glove Box)
Ib284Dash Wire and Dash Wire (Behind the Combination Meter)
Id184Dash Wire and Dash Wire (Instrument Panel Center)Id384Dash Wire and Dash Wire (Instrument Panel Center)
If184Engine Wire and Engine Wire (Behind the Glove Box)
:Ground Points
CodeSee PageGround Points Location
EA76Front Right Side of Fender Apron
EC76Rear Bank of Right Cylinder Head
EE76Front Left Side of Fender Apron
IF78Set Bolt of Cowl Side J/B LH
:Splice Points
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
E876Transmission WireE1076Engine Wire
E976Transmission Wire

Page 2228 of 3115

TOYOTA LAND CRUISER 1998 Factory Repair Manual 2004 LAND CRUISER (EWD548U)
221 Memo

Page 2229 of 3115

TOYOTA LAND CRUISER 1998 Factory Repair Manual 2004 LAND CRUISER (EWD548U)
222Cruise Control
E 8 25C5D 15
1BATT
1EFI OR ECD
Relay 11
1 2From Power Source System (
See Page 94)
1B 44
1A 43 1B39
EA EE 45
2A 5
2D 34
W- B
2D 36E 1E2 25A
EFI OR ECD
NO.

Page 2230 of 3115

TOYOTA LAND CRUISER 1998 Factory Repair Manual 2004 LAND CRUISER (EWD548U)
223
1 2
4 3
E 5(
A)
, E 6(
B)
, E 7(
C)
, E 8(
D)
, E 9(
E)4D 12
4E 217D 4
7B 3
P- B
E 207B 513
4D 18
4E 177B 8
7B 6
V- W
E 187 11
P- B
P- B
V- W P- B
V- W
D 1
SIL TC TC
SI

Page 2231 of 3115

TOYOTA LAND CRUISER 1998 Factory Repair Manual 2004 LAND CRUISER (EWD548U)
224Cruise Control
10A
GAUGE2
3E 3
11 EB1 Ib2 6
IN2 14D3
7
6D 27
6C 19
D 10
G- Y
D
R- L R- L
R- L
G- Y
E10
BR
Speedometer
9 C12(
A)
, C15(
D)
BRSB
EB1 17 D D 29 D18
CRUISE
1

Page 2232 of 3115

TOYOTA LAND CRUISER 1998 Factory Repair Manual 2004 LAND CRUISER (EWD548U)
225
The cruise control system is a constant vehicle speed controller which controls the opening angle of the engine throttle valve
by the SW, and allows driving at a consta

2004 LAND CRUISER (EWD548U)
225
The cruise control system is a constant vehicle speed controller which controls the opening angle of the engine throttle valve
by the SW, and allows driving at a constant speed without depressing the accelerator pedal.
Set Operation
When the ON-OFF SW is turned on, the systems starts preparations for cruise control and turns on the indicator light in the
combination meter.
Set Speed Control
When the - SET SW is operated with the ON-OFF SW turned on during driving, the speed is controlled at a constant speed.
Coast Control
When the - SET SW is kept turned on during cruise control driving, the engine control module controls the throttle valve to
decelerate the vehicle speed.
Every time the - SET SW is turned on instantaneously, the vehicle speed is decelerated approx. 1.5 km/h.
Accel Control
When the + RES SW is kept turned on during cruise control driving, the engine control module controls the throttle valve to
accelerate the vehicle speed.
Every time the + RES SW is turned on instantaneously, the vehicle speed is accelerated approx. 1.5 km/h.
Resume Control
If the vehicle speed is within the low speed limit (Approx. 40 km/h, 25 mph) when canceling the cruise control, operation of
the + RES SW accelerates the vehicle speed and resumes the level before canceling the cruise control.
Manual Cancel Mechanism
If any of the following signals are input during cruise control driving, the cruise control is canceled.
*The stop light SW is on
*The CANCEL SW is turned on
*The ON-OFF SW is turned off
Auto Cancel Function
If any of the following conditions are detected, the cruise control is canceled:
*Failure in the stop light SW wiring
*Abnormality in the vehicle speed signal
*Malfunction in the electronically controlled throttle parts
Overdrive Function
The overdrive may be canceled if the vehicle travels on a upward slope during cruise control driving. After the overdrive is
canceled, if the vehicle speed exceeds the overdrive return speed (Set speed ( 2 km/h, 1.2 mph) ) and it is determined that
the slope has finished, and the vehicle returns to overdrive mode again.
E7 (C), E8 (D), E9 (E) Engine Control Module
BATT-E1 : Always 9.0-14.0 volts
IGSW-E1 : 9.0-14.0 volts with ignition SW at ON or ST position
STP-E1 : 7.5-14 volts with brake pedal is depressed
: Below 1.5 volts with brake pedal is released
C18 Combination SW
5-4 : Approx. 1540 W with CANCEL SW on
: Approx. 240 W with + RES SW on
: Approx. 630 W with - SET SW on
: Parts Location
CodeSee PageCodeSee PageCodeSee Page
A1470D770G470
A4570E5A70J1471
C12A70E6B70P169
C15D70E7C70S571
C1870E8D70T1669
D168E9E70V269
System Outline
Service Hints

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