1998 TOYOTA LAND CRUISER brake

2004 LAND CRUISER (EWD548U)
160Trailer Towing
T15 Towing Converter Relay
1-Ground : Always approx. 12 volts
6-Ground : Always continuity
S5 Stop Light SW
2-1 : Closed with brake pedal depressed
: Parts Location
CodeSee PageCodeSee PageCodeSee Page
J2272T1171T1871
P169T1273T2373
S571T1573
:Junction Block and Wire Harness Connector
CodeSee PageJunction Block and Wire Harness (Connector Location)
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)
2K28Floor No.1 Wire and Cowl Side J/B LH (Left Kick Panel)
3E40Dash Wire and Cowl Side J/B RH (Right Kick Panel)
3K40Floor No.2 Wire and Cowl Side J/B RH (Right Kick Panel)
3M43Dash Wire and Cowl Side J/B RH (Right Kick Panel)
6A60Dash Wire and J/B No 6 (Behind the Grove Box)6C60Dash Wire and J/B No.6 (Behind the Grove Box)
:Connector Joining Wire Harness and Wire Harness
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
IA278Engine Room No.2 Wire and Floor No.1 Wire (Left Kick Panel)
ID478Dash Wire and Floor No.1 Wire (Left Kick Panel)
IN280Engine Wire and Dash Wire (Behind the Glove Box)
Ib284Dash Wire and Dash Wire (Behind the Combination Meter)
BD286Floor No.3 Wire and Floor No.1 Wire (Left Rear Side Quarter Panel)
BL188Floor No 2 Wire and Floor No 3 Wire (Right Side of Rear Floor Crossmember)BL588Floor No.2 Wire and Floor No.3 Wire (Right Side of Rear Floor Crossmember)
BX188Frame No.4 Wire and Floor No.3 Wire (Left Side of Rear Floor Crossmember)
:Ground Points
CodeSee PageGround Points Location
II78Set Bolt of Cowl Side J/B RH
BJ86Under the Driver's Seat
BK86Front Side Under the Front Passenger's Seat
BM86Left Rear Side Quarter Panel
:Splice Points
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
B1188Floor No.1 WireB2488Floor No.1 Wire
B1688Floor No.3 Wire
Service Hints

2004 LAND CRUISER (EWD548U)
189
B 7(
A)
, B 8(
B)
, B 9(
C)
BEAKE
C 18 D20 D 1C 1D16 D19 37 2Q 14 2E
IX1 8
ECB 2
27 2K 31 2Q
1IU1 9
12 4C34F
10 4A64E
34C 44E
C 3A 19 A39
D 18 E12
66 2Q 24 2EE 8(
D)
, E 9(
E)
MPX2 MPX+ MPX-411
MPX1 ELS TC
R- W
B
B
P- B P- BB B P- B
G- W
W- LSB
SB
SB
SB
SB
R- W
SB
W- L
G- W PKB
G 4
C12(
A)
, C13(
B)
, C14(
C)
, C15(
D) SB
SB
(
*1)
(
*1)
* 1 : w/ Navigation System
(
*1)
(
*1)
D 29
SB
MPD1 MPD2
P 8
A45(
A)
, A47(
C)
BR
BR BR
Combination Meter
Engine Control Module
Gateway ECU
Parking Brake SW
A/C Control Assembly
Body ECU
W- BW- B
EB19
BR

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

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

2004 LAND CRUISER (EWD548U)
230VSC
2 A 23 12 A A22 A10
W
R
B
321
(
Shielded)
M 4
C 18IG4 22
(
Shielded)(
Shielded)
518Y 1
C 27IG4 18
C 28IG4 20
C 9IG4 19
C 19IG4 21
C 10IG4 17
C 22IG4 16 624
R
W
B
L
Y
G R
W
B
L
Y
G
Y- GB 13
12B 4
2K 27
R- W R- W
P 8
16
B 127D 6
57D D 1
B 9
W- L
A
A
IA2 7 IA2 5
1 2
W
A36BD3 10 BD311
W
BF2B 21
BD3 8
W
IA2 6
BD3 9
BF2 1B 20
BBB(
Shielded) (
Shielded)
B
W
AJ 2
6IA2 14
1 2
G
A35BD3 7
G
BF2B 19
G
IA2 15
BD3 6
BF2 5B 18
RRR(
Shielded) (
Shielded)
R
G (
Shielded)
(
Shielded)
A41(
A)
, A42(
B)
, A43(
C)
, A44(
D) MSS E2 PMC VCMGND VOUT VCC GYAW YAW2 VYS YD GL2 GL1
YSS GYAW YAW VYS YD GL2 GL1
WW
TS TS
PKB
Y- G RL+ RL- RR+ RR- RSS
IA2 16SB SB
ABS Speed Sensor
Rear LHABS Speed Sensor
Rear RH ABS & BA & TRAC & VSC ECUData Link
Connector 1
Master Cylinder Pressure Sensor
Parking Brake SW
Yaw Rate Sensor
Junction
Connector W
P- B
7B 2 11TC
WP- B

2004 LAND CRUISER (EWD548U)
232VSC
ABS
BRAKE
VSC TRAC
Slip
VSC OFF
TRAC
EC IX1 8 2Q 36
2B 20
SB
SB
W
G
L- R
L- W SB
SB
SB
SB
SB
SB
W
G
L- R
L- W
Y- GC12(
A)
, C13(
B)
, C14(
C)
, C15(
D)
A 12
SB SB
SB
SB
SB
SB
SB
SB Y- G
BR
C 19 C20 B16 B15 B17 B18 A10 D1SB SB
Combination Meter

2004 LAND CRUISER (EWD548U)
234VSC
1. ABS Operation
If the brake pedal is depressed suddenly, the ABS controls the hydraulic pressure of the wheel cylinders for all the four
wheels to automatically avoid wheel locking and ensure the directional and steering stability of the vehicle. If the brake pedal
is depressed suddenly, the ABS & BA & TRAC & VSC ECU controls the solenoids in the actuators using the signals from the
sensors to move the brake fluid to the reservoir in order to release the braking pressure applied to the wheel cylinder. If the
ABS & BA & TRAC & VSC ECU detects that the fluid pressure in the wheel cylinder is insufficient, the ECU controls the
solenoids in the actuators to increase the braking pressure.
2. Traction Control Operation
The traction control system controls the engine torque, the hydraulic pressure of the driving wheel cylinders, slipping of the
wheels which may occur at start or acceleration of the vehicle, to ensure an optimal driving power and vehicle stability
corresponding to the road conditions.
3. VSC Operation
Unexpected road conditions, vehicle speed, emergency situation, and any other external factors may cause large under- or
over-steering of the vehicle. If this occurs, the VSC system automatically controls the engine power and wheel brakes to
reduce the under- or over-steering.
To reduce large over-steering :
If the VSC system determines that the over-steering is large, it activates the brakes for the outer turning wheels depending
on the degree of the over-steering to produce the moment toward the outside of the vehicle and reduce the over-steering.
To reduce large under-steering :
If the VSC system determines that the under-steering is large, it controls the engine power and activates the rear wheel
brakes to reduce the under-steering.
VSC indicator light
If an error occurs in the VSC system, the VSC indicator lights up to warn the driver.
4. Traction Mode and VSC Function
When the center differential of the transfer is locked, the VSC function is turned off. At this time, the VSC OFF indicator light
in the combination meter will come on, and informs the driver that the VSC function is OFF.
5. Mutual System Control
To efficiently operate the VSC system at its optimal level, the VSC system and other control systems are mutually controlled
while the VSC system is being operated.
Engine throttle control
The engine power does not interfere with the VSC brake control by controlling the opening of the throttle and reducing the
engine output.
Engine control and electronically controlled transmission control
The strong braking force does not interfere with the braking force control of the VSC system by turning off the accel. and
reducing changes in the driving torque at shift-down.
VSC system operation indication
The slip indicator light flashes and the buzzer sounds intermittently to warn the driver that the current road is slippery, while
the VSC system is being operated.
6. Fail Safe Function
If an error occurs in the ABS & BA & TRAC & VSC ECU, sensor signals, and/or actuators, the ABS & BA & TRAC & VSC
ECU inhibits the brake actuator control and inputs the error signal to the engine control module. According to the error signal,
the brake actuator turns off the solenoid and the engine control module rejects any electronically controlled throttle open
request from the VSC system. As a result, the vehicle functions without the ABS, BA, TRAC, and VSC systems.
System Outline

2004 LAND CRUISER (EWD548U)
235
A41 (A), A42 (B), A44 (D) ABS & BA & TRAC & VSC ECU
(D)15-Ground : Always approx. 12 volts
(B) 6-Ground : Approx. 12 volts with ignition SW at ON or ST position
(D)22-Ground : Approx. 12 volts with ignition SW at ON or ST position
(B)10-Ground : Approx. 12 volts with brake pedal depressed
(A) 6, (A) 31, (B) 8, (B) 17-Ground : Always continuity
A12 ABS Speed Sensor Front LH
2-4 : Approx. 1.07 kW (20 °C, 68 °F)
A13 ABS Speed Sensor Front RH
1-2 : Approx. 1.07 kW (20 °C, 68 °F)
A35, A36 ABS Speed Sensor Rear LH, RH
1-2 : Approx. 1.2 kW (25 °C, 77 °F)
: Parts Location
CodeSee PageCodeSee PageCodeSee Page
A1268A42B70D770
A1368A43C70E970
A3572A44D70J271
A3672C12A70M469
A37A68C13B70P169
A38B68C14C70P873
A39C68C15D70S571
A40D68C1770V871
A41A70D168Y171
:Relay Blocks
CodeSee PageRelay Blocks (Relay Block Location)
122Engine Room R/B (Engine Compartment Left)
:Junction Block and Wire Harness Connector
CodeSee PageJunction Block and Wire Harness (Connector Location)
2A28Engine Room No 2 Wire and Cowl Side J/B LH (Left Kick Panel)2B28Engine Room No.2 Wire and Cowl Side J/B LH (Left Kick Panel)
2D28Dash Wire and Cowl Side J/B LH (Left Kick Panel)
2K28Floor No.1 Wire and Cowl Side J/B LH (Left Kick Panel)
2Q30Instrument Panel Integration Wire and Cowl Side J/B LH (Left Kick Panel)
3A40Engine Room No 2 Wire and Cowl Side J/B RH (Right Kick Panel)3B40Engine Room No.2 Wire and Cowl Side J/B RH (Right Kick Panel)
3E40Dash Wire and Cowl Side J/B RH (Right Kick Panel)
3Q42Instrument Panel Integration Wire and Cowl Side J/B RH (Right Kick Panel)
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)
Service Hints