1998 TOYOTA LAND CRUISER engine coolant

2004 LAND CRUISER (EWD548U)
68G ELECTRICAL WIRING ROUTING
Position of Parts in Engine Compartment
A 1 A/C Ambient Temp. Sensor
A 4 Pressure SW
A 5 A/C Lock Sensor
A/C Magnetic Clutch
A 12 ABS Speed Sensor Front LH
A 13 ABS Speed Sensor Front RH
A 15 Airbag Sensor Front LH
A 16 Airbag Sensor Front RH
A 17 Auto Antenna Motor
A 37 ABS & BA & TRAC & VSC Actuator
A 38 ABS & BA & TRAC & VSC Actuator
A 39 ABS & BA & TRAC & VSC Actuator
A 40 ABS & BA & TRAC & VSC Actuator
C 1 Camshaft Position Sensor
C 2 Center Diff. Lock Control Motor
C 3 Crankshaft Position Sensor
D 1 Data Link Connector 1
D 2 Daytime Running Light Relay No.3
D 3 Daytime Running Light Relay No.3
D 4 Detection SW (Center Diff. Lock)
D 5 Detection SW (Transfer L Position)
D 6 Detection SW (Transfer Neutral Position)E 1 Electronically Controlled Transmission Solenoid
E 2 Engine Coolant Temp. Sensor
E 3 Engine Hood Courtesy SW
F 1 Front Fog Light LH
F 2 Front Fog Light RH
F 3 Front Turn Signal Light LH
Side Marker Light LH
F 4 Front Turn Signal Light RH
Side Marker Light RH
F 5 Front Wiper Motor
F 14 Fuel Pump Resistor
F 15 Fusible Link Block
F 16 Fusible Link Block
F 17 Fusible Link Block
F 18 Fusible Link Block
F 19 Fusible Link Block
G 1 Generator
G 2 Generator

2004 LAND CRUISER (EWD548U)
M
13
141516
4 LAND CRUISER (
Cont' d)(
Cont. next page)
19A 30A 29A 20A
542
31A 28
G- B L- Y G- WY- B BR- W
BR- W BR- W
BR- WB- Y BR- WTHW VG E2G THA E2
VG E2G THA
+BE2
BR- W 1 2
Y- B
G- W
L- Y
8IN2 2IN2 10IN2
6IW3 5IW3 8IW3
Y- B
G- W
L- Y7IW3 7 IN23If1
M 19
H 8
EB3 1
B- Y 33 B 22 B
13
24 HT 2A OX2 A
HT OX
+B E1
Y W
B- Y
23 B 4 B
31
24 OX1A HT1A
OX HT
+B E1
B R
B- Y BR- W H 5
25 B 21 B
13
24 HT 2B OX2 B
HT OX
+B E1
R- BW
B- Y BR- W
29 B 5 B
31
24 OX1B HT1B
OX HT
+B E1
BLBR-WH 6
EC EB3
BR- W
B- Y BR- W BR- W 9A
IGT1
B
8A
IGT2
R25 A
IGT3
L11 A
IGT4
G12 A
IGT5
Y26 A
IGT6
B- Y13 A
IGT7
B- LBR- W
12 E
ELS2D
ACMG13 E
EL S233 D
ACLD32 D
THE L CKIC 23 31 D
A/CS THWOD 14 Air Conditioning (
Front)
System
< 31- 6> < 31- 7> Ignition Coil and Igniters
<3- 2><3- 3><3- 4>
VPAE 22
VPA2E 23
EPAE 28
H 7
VCPAE 26
3EB3EPA2E 29
EB3 8VCP2E 27 523614
R R- B BR- WL- R W- RW
A1 4
EB3
5
(
Shielded)
(
Shielded) (
Shielded)BR
Rear Bank of
Right Cylinder
He ad 10 A
IGT8
L- B24 A
IGF1
B- W23 A
IGF2
B- R
EB3 1117 D
V14 E
B
Cent er Air bag Sens or
Assembly< 13- 8>19 D
G- W
Stop Light SW
<10- 3>
SPD F/PSCombination Meter
<30- 6>
STP
B- Y
BRBR
BR- W
B- Y B- YBR- W
R- BWBL
B
A
C
D
E
FB- RSB
V- W
BR- W
B- Y
B- Y
E ngine C ontrol
E 2
A
B
C
F
G SB
V- W
B- R
(
Shielded) E 5(
A)
, E 6(
B)
, E 7(
C)
, E 8(
D)
, E 9(
E)
D
E (
Shielded)
(
Shielded)
B- Y (
Shielded)
(
Shielded)
BR
(
Shielded)
D DD BR BR
EB19
BR
BR
C
CCCC E E E E
J17
(
Shielded)
E
(
Shielded) (
Shielded)
(
Shielded)
(
Shielded) VPA1 VPA2 EP1 VCP1 EP2 VCP2
G- W
Body ECU
<1- 39>
Ac cel Pos ition Sens or
Engine Coolant
Temp. Sensor
Engine Cont rol Module
Heated Oxygen Sensor
(
Bank 1 Sens or 1) Heated Oxygen Sensor
(
Bank 1 Sens or 2)
Heated Oxygen Sensor
(
Bank 2 Sens or 1) Heated Oxygen Sensor
(
Bank 2 Sens or 2)
Mass Air Flow Met er
J unction Connec tor

L
CodePart Name Part NumberCodePart Name Part Number
2004 LAND CRUISER (EWD548U)
407
D21Door Lock Motor Front LHD21Door Unlock Detection SW Front LH
D22Door Lock Motor Front RHD22Door Unlock Detection SW Front RH90980-1 1150
D23Door Lock Motor Rear LH90980-11150
D23Door Unlock Detection SW Rear LH
D24Door Lock Motor Rear RHD24Door Unlock Detection SW Rear RH
D26DVD Automatic Changer90980-1 1971
D27Door Control Receiver90980-1 1909
E 1Electronically Controlled Transmission
Solenoid90980-12293
E 2Engine Coolant Temp. Sensor90980-10736
E 3Engine Hood Courtesy SW90980-1 1003
E 4Electronically Controlled Transmission
Pattern Select SW90980-10933
E 5Engine Control Module90980-12144
E 6Engine Control Module90980-12145
E 7Engine Control Module90980-12143
E 8Engine Control Module90980-12146
E 9Engine Control Module90980-12142
F 1Front Fog Light LH90980-1 1660F 2Front Fog Light RH90980-1 1660
F3Front Turn Signal Light LHF 3Side Marker Light LH90980-1 1020
F4Front Turn Signal Light RH90980-1 1020
F 4Side Marker Light RH
F 5Front Wiper Motor90980-1 1599
F 8Front Door Speaker LH90980-10935F 9Front Door Speaker RH90980-10935
F10Front Interior Light90980-12211F10Rear Personal Light90980-12211
F11Front Personal Light90980-10825
F12Fuel Pump90980-1 1077F12Fuel Sender90980-11077
F14Fuel Pump Resistor90980-1 1156
F15Fusible Link Block90980-1 1996
F16Fusible Link Block90980-1 1881
F17Fusible Link Block90980-1 1775
F18Fusible Link Block90980-10995
F19Fusible Link Block82675-60050
G 1Generator90980-1 1964
G 2Generator90980-09212
G 3Glove Box Light90980-1 1098
G 4Gateway ECU90980-1 1911
H 1Headlight LH (High)90980-1 1659
H 2Headlight LH (Low)90980-1 1660
H 3Headlight RH (High)90980-1 1659
H 4Headlight RH (Low)90980-1 1660
H 5Heated Oxygen Sensor (Bank 1 Sensor 1)90980-10869
H 6Heated Oxygen Sensor (Bank 1 Sensor 2)90980-1 1028
H 7Heated Oxygen Sensor (Bank 2 Sensor 1)90980-10869
H 8Heated Oxygen Sensor (Bank 2 Sensor 2)90980-1 1028
H 9Horn LH90980-10619H10Horn RH90980-10619
H11High Mounted Stop Light90980-1 1211
I 1Ignition Coil and Igniter No.1
I 2Ignition Coil and Igniter No.2
I 3Ignition Coil and Igniter No.3
I 4Ignition Coil and Igniter No.490980-1 1885I 5Ignition Coil and Igniter No.590980-1 1885
I 6Ignition Coil and Igniter No.6
I 7Ignition Coil and Igniter No.7
I 8Ignition Coil and Igniter No.8
I 9Injector No.1
I10Injector No.2
I11Injector No.3
I12Injector No.490980-1 1153I13Injector No.590980-11153
I14Injector No.6
I15Injector No.7
I16Injector No.8
I18Ignition SW90980-1 1615
I22Inner Mirror90980-1 1186
J 1Junction Connector90980-1 1398
J 2Junction Connector90980-1 1915
J 3Junction Connector90980-1 1398J 4Junction Connector90980-1 1398
J 5Junction Connector90980-1 1925
J 6Junction Connector90980-1 1927J 7Junction Connector90980-1 1927
J 8Junction Connector90980-10803
J 9Junction Connector90980-1 1927J10Junction Connector90980-1 1927
J11Junction Connector90980-10803
J12Junction Connector90980-1 1927
J13Junction Connector90980-1 1925
J14Junction Connector90980-1 1927
J15Junction Connector90980-1 1925

2004 LAND CRUISER (EWD548U)
11 3
2 1
WB-R
C 6
I152 1
B- W B- R
C 5
I16
B- R
E 5(
A)
, E 6(
B)
, E 7(
C)
, E 8(
D)
, E 9(
E) 6D 356C 122E 272B 6
1A 401B 38
C 21EE1 2
4
B- O B- OB B- O
L
G 1
A 9
IGT1B
A 8
IGT2
R
A 25
IGT3
L
A 11
IGT4
G
A 12
IGT5
Y
A 26
IGT6
B- Y
A 13
IGT7
B- L
A 10
IGT8
L- B
A 24
IGF1
B- W
A 23
IGF2
B- R
Ignition Coil and Igniters
1 2A 19
G- B BR- WIN2 8
IW3 6
L- Y
A 30
L- Y L- Y
5IN2 2
IW3 5
G- W
A 29
G- W G- W
4IN2 10
IW3 8
Y- B
A 20
Y- B Y- B
27IW3 IN27
1
BR
BR
BR- W
If1 3A 28
HTB 33 B22 B4 B 23
13 31
E 2
M 1 VG E2G THA E2
BR- W BR- W
OX
+B E1OX
H 7
H 5
HT
+B E1
(
Shielded)
(
Shielded)
BR- W
B- Y BR- W
B- Y BR- W
B- Y BR- W BR- W BR- W
B- Y
B- Y
WY
B
R B- Y
BR- W BR- WB- Y
24 24
(
Shielded) (
Shielded)
THW VG E2G THA E2 HT2A OX2A OX1A HT1A#7 #8 RL
3+B
B- Y
E11
E10E10
E10 E10E10 E10 E10
Engine Coolant Temp. Sensor
Engine Control ModuleGen erat or
Heated Oxygen Sensor
(
Bank 1 Sensor 1) Heated Oxygen Sensor
(
Bank 2 Sensor 1)Injector No. 7
Injector No. 8
Mass Air Flow MeterB
B- O
If1 8

2004 LAND CRUISER (EWD548U)
11 8Engine Control
The engine control system utilizes a microcomputer and maintains overall control of the engine, transmission etc. An outline
of the engine control is given here.
1. Input Signals
(1) Engine coolant temp. signal circuit
The engine coolant temp. sensor detects the engine coolant temp. and has a built-in thermistor with a resistance which
varies according to the engine coolant temp. The engine coolant temp. is input into TERMINAL THW of the engine
control module as a control signal.
(2) Intake air temp. signal circuit
The intake air temp. sensor is installed in the mass air flow meter and detects the intake air temp., which is input as a
control signal to TERMINAL THA of the engine control module.
(3) Oxygen sensor signal circuit
The oxygen density in the exhaust emission is detected and is input as a control signal from the heated oxygen sensors
to TERMINALS OX1A, OX1B, OX2A, OX2B of the engine control module.
(4) RPM signal circuit
The camshaft position is detected by the camshaft position sensor and is input into TERMINAL G2+ of the engine
control module as a control signal. Also, the engine RPM is detected by the crankshaft position sensor and the signal is
input into TERMINAL NE+ of the engine control module.
(5) Throttle position sensor signal circuit
The throttle position sensor detects the throttle valve opening angle as a control signal, which is input into TERMINALS
VTA1, VTA2 of the engine control module.
(6) Vehicle speed circuit
The vehicle speed sensor (Combination meter) detects the vehicle speed, and the signal is input into TERMINAL SPD
of the engine control module via the combination meter.
(7) Battery signal circuit
Voltage is constantly applied to TERMINAL BATT of the engine control module. When the ignition SW is turned on, the
voltage for engine control module start up power supply is applied through the EFI OR ECD relay, to TERMINALS +B,
+B2 of the engine control module. The current from the IGN fuse flows to TERMINAL IGSW of the engine control
module, and voltage is constantly applied to TERMINAL +BM.
(8) Intake air volume signal circuit
The intake air volume is detected by the mass air flow meter, and is input as a control signal to TERMINAL VG of the
engine control module.
(9) Stop light SW signal circuit
The stop light SW is used to detect whether the vehicle is braking or not, and the signal is input into TERMINAL STP of
the engine control module as a control signal.
(10) Starter signal circuit
To confirm whether the engine is cranking, the voltage applied to the starter motor when the engine is cranking is
detected, and is input into TERMINAL STA of the engine control module as a control signal.
(11) Engine knock signal circuit
Engine knocking is detected by the knock sensors, and is input into TERMINALS KNK1, KNK2 of the engine control
module as a control signal.
System Outline

2004 LAND CRUISER (EWD548U)
11 9
2. Control System
*SFI system
The SFI system monitors the engine condition through the signals input from each sensors to the engine control module.
The control signal is sent to the engine control module TERMINALS #1, #2, #3, #4, #5, #6, #7, #8 to operate the injector
(Fuel injection). The SFI system controls the fuel injection by the engine control module in response to the driving
conditions.
*ESA system
The ESA system monitors the engine condition through the signals input from each sensors to the engine control module.
The best ignition timing is decided according to this data and the data memorized in the engine control module. The
control signal is output to TERMINALS IGT1, IGT2, IGT3, IGT4, IGT5, IGT6, IGT7, IGT8, and these signals control the
igniter to provide the best ignition timing.
*Heated oxygen sensor heater control system
The heated oxygen sensor heater control system turns the heater on when the intake air volume is low (Temp. of exhaust
emission is low), and warms up the heated oxygen sensors to improve their detection performance. The engine control
module evaluates the signals from each sensors, and outputs current to TERMINALS HT1A, HT1B, HT2A, HT2B to
control the heater.
*Fuel pump control system
The engine control module supplies current to TERMINAL FPR, and controls the operation speed of the fuel pump by the
F/PUMP relay.
*ACIS
The ACIS includes a valve in the bulkhead separating the surge tank into two parts. This valve is opened and closed in
accordance with the driving conditions to control the intake manifold length in two stages, for increased engine output in all
ranges from low to high speeds.
*ETCS-i
The ETCS-i controls the engine output at its optimal level in accordance with the opening of the accelerator pedal, under
all driving conditions.
3. Diagnosis System
When there is a malfunction in the engine control module signal system, the malfunctioning system is recorded in the
memory. The malfunctioning system can be found by reading the code displayed on the malfunction indicator lamp.
4. Fail-Safe System
When a malfunction has occurred in any system, there is a possibility of causing engine trouble due to continued control
based on that system. In that case, the fail-safe system either controls the system using the data (Standard values)
recorded in the engine control module memory, or else stops the engine.
E2 Engine Coolant Temp. Sensor
1-2 : Approx. 15.0 kW (-20°C, -4°F)
: Approx. 2.45 kW (20°C, 68°F)
: Approx. 0.32 kW (80°C, 176°F)
E5 (A), E7 (C), E8 (D), E9 (E) Engine Control Module
BATT-E1 : Always 9.0-14.0 volts
+BM-E1 : Always 9.0-14.0 volts
IGSW-E1 : 9.0-14.0 volts with ignition SW at ON or ST position
+B, +B2-E1 : 9.0-14.0 volts with ignition SW at ON or ST position
VC-E2 : 4.5-5.5 volts with ignition SW on
VTA2-E2 : 2.0-2.9 volts with ignition SW on and accelerator pedal released
: 4.6-5.1 volts with ignition SW on and accelerator pedal depressed
VTA1-E2 : 0.4-1.0 volts with ignition SW on and accelerator pedal released
: 3.2-4.8 volts with ignition SW on and accelerator pedal depressed
THA-E2 : 0.5-3.4 volts with idling, intake air temp. 20°C (68°F)
THW-E2 : 0.2-1.0 volts with idling, engine coolant temp. 80°C (176°F)
W-E1 : 9.0-14.0 volts with idling
: Below 3.0 volts with ignition SW on
Service Hints

2004 LAND CRUISER (EWD548U)
213
7. 5A
IGN
3E 8
4D 9
4E 14
E 9
B- R B- R
15A
STOP From Power Source System (
See Page 94)
2D 31
1 2
2E 26
2D 353M 5
3M 4
D 19
S 5
G- W
4D 12
4E 217D 4
7B 3
P- B
E 207B 513
4D 18
4E 177B 8
7B 6
V- W
E 187 11
A 19
1 2
BR- W
O
Y
R
OT+ OT2+SLU- SLU+ SL2- SL2+ SL1- SL1+ OT2- OT-
L
Y
V
LG
BRY
O
A 28
E 8
BR- W BR- W
2191012 411 313 5EB2 4B 24
L L BR- W
EB2 1B 32
G- Y G- Y
EB3 6B 19
R- L R- L
EB3 10B 18
R- W R- W
EB3 4B 17
P- B P- B
EB3 7B 16
P- L P- L
EB2 2C 16
P- G P- G
EB3 2C 15
B B
E 1 E10
E 2G- B BR- W
BR- W BR- W
THW E2 THO2 THO1 SL1+ SL2+ SL2-SL1- SLU+ SLU-
G- R
G- W
G- W
P- B
P- B
V- W P- B
V- W
D 1
D 7
SIL TC TC
SIL TC STP IGSW
E 5(
A)
, E 6(
B)
, E 7(
C)
, E 8(
D)
, E 9(
E)
BR- W
Data Link
Connector 1
Data Link
Connector 3
Electronically Contr olled Transmissi on Solenoid
Engine Coolant
Temp. Sensor
Engine Control Module
Stop Light SW
E10If13
EB31 BR- W
BR- W

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