1998 TOYOTA LAND CRUISER Rear differential

DIC94-02
BR3583
BR3582F00010
RotorSpeed Sensor
Magnet
To ECU
+V
-VHigh Speed
Low Speed
CoilNS
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-615
808 Author
: Date
:
2004 LAND CRUISER (RM1071U)
CIRCUIT INSPECTION
DTC
C0200 / 31 - C1239 / 39Speed Sensor Circuit
CIRCUIT DESCRIPTION
The speed sensor detects wheel speed and sends the ap-
propriate signals to the ECU. These signals are used for control
of the ABS & BA & TRAC & VSC control system. The front and
rear rotors each have 48 serrations.
When the rotors rotate, the magnetic field emitted by the perma-
nent magnet in the speed sensor generates AC voltage. Since
the frequency of this AC voltage changes in direct proportion to
the speed of the rotor, the frequency is used by the ECU to de-
tect the speed of each wheel.

DTC No.DTC Detecting ConditionTrouble Area
C0200 / 31
C0205 / 32
C0210 / 33
C0215 / 34
Detection of any of the conditions 1. through 4.:
1. At a vehicle speed of 6 mph (10 km/h) or more, pulses
are not input for 15 sec.
2. Momentary interruption of the speed sensor signal oc-
curs at least 7 times in the time between switching the
ignition switch ON and switching it OFF.
3. Continuous noise occurs into the speed sensor signals
with a vehicle speed at 12 mph (20 km/h) or more.
4. The condition that the speed sensor signal circuit is
open continues for 0.12 sec. or more.

ABS does not function

Brake pedal is not depressed

Parking brake is not set

Rear differential does not lock
Under the above conditions, when the difference in velocity
between the highest rotating and the second highest rotat-
ing wheels is within 1 mph (2 km/h), the slowest wheel ro-
tates at 0 mph (0 km/h), and the second slowest wheel
rotates at 7 mph (12 km/h) for 1 second or more.

Right front, left front, right rear and left rear speed sensor

Each speed sensor circuit

Sensor rotor
C1235 / 35
C1236 / 36
C1238 / 38
C1239 / 39Continuous noise occurs into the speed sensor
signals with a vehicle speed at 12 mph (20 km/h)
or more continues for 5 sec or more.
Right front, left front, right rear, left rear speed sensor

Speed sensor rotor
HINT:

DTC No. C0200 / 31 and C1235 / 35 are for the right front speed sensor.

DTC No. C0205 / 32 and C1236 / 36 are for the left front speed sensor.

DTC No. C0210 / 33 and C1238 / 38 are for the right rear speed sensor.

DTC No. C0215 / 34 and C1239 / 39 are for the left rear speed sensor.

2004 LAND CRUISER (EWD548U)
M OVERALL ELECTRICAL WIRING DIAGRAM
1
234
14 LAND CRUISER
2C 1
2A 1B120A
J/B NO. 2
120A MAIN
140A ALT
II F1 5(
A)
, F16(
B)
, F17(
C)
B- G
I18
Bat tery
IG1 NO. 3 Relay1 2
3 5 3Q 39 3C1SB
7. 5A AM1
2E 39
B- G
1C
B- G
120A
J/B NO. 3 W- R L- B 7. 5A MET
3Q 73E 4
B- G
2
7ACC
IG1
IG2
ST2 AM1 4
6 AM2
91B
11C
15A AM210 2A 41 2E
W- RB- R B- RABS & BA &
TRAC & VSC
ECU< 12- 9>
EB1 5
ECII Set Bolt of
Cowl Side J/B RH 13 I N2 5IN2
1EB1 6 EB1 2 EB1 12 EB1
M EB1 11 8 EB1
1 2
1 2
1 2 2IX1 14 I N23 6 9
10 4 1 5 2
4 10 A
14 B
21 53
3E 6 W- B
L- BW- B W- B
G- Y
G
G- R
G- B G- Y
G
G- R
G- B G
G- R
W- B
W- B Y- G Y- G
P- B Y- G
SB SB SBW- B Engine Contr ol Module
<5- 12>
R- L R- L R- L ABS & BA & TRAC & VSC
ECU< 12- 9>P- B
3EB1
B- L B- L
W- B B- L
W- B
3Q 563Q 28 3B36D38
6D 39D 4D 6
D 5 Ce nt e r
Diff. LockA A
C12(
A)
, C13(
B)
J 4B- R
6Ib2
R- L
6D 32
6D 313Q 20
543B
5IX1SB B- L C 5
C 2
3 I b2 2 Ib2 3 I b1 2 Ib1
B B- R B- R
B B
B- R
Ib2 10 Ib21
6D 5 6D 46B 2 6B 3
G- Y
G
G- R
G- B
25 2627 2
113
B
B- R
(
*1)
(
*2)
(
*1)
(
*2)
C28
A45
DEFC
2WD 4WD
B- R
B- R
1 2
5 3 19 2D
10A GAUGE1 R- LIG1 NO. 2 Relay
Se t Bol t o f
Co wl S i de J/ B RH IF Se t Bol t o f
Co wl S i de J/ B L H17
4D5
4C
R- L
(
*1)
R- L(
*1)
R- L(
*2) R- L* 1 : w/ Nav igation Sy st em
* 2 : w/o Navigation System
2E 37 2Q77
10A GAUGE2
3E 3 53E
20A DIFF L- B R- L
Rear Bank of Right
Cylinder Head
SB
Power SourceCenter Differential Lock
DEFC
2WD 4 WD
REL2 M2 M1 REL1 GND2WD 4WD IG
B- L
Engine Contr ol Module
<5- 12>
15 6C
Center Diff.
Lock Control
Motor Center Diff. Lock Control Relay
Combination MeterDet ection SW
(
Center Diff. Lock)
Det ection SW
(
Trans fer L Pos ition) Detection SW
(
Transf er Neutr al Position)
Ignition SW
A/C Cont rol Assembly
J unc tion
Connec tor
Center Cluster
I ntegr ation Panel
Fusible Link Block
W- B

SYSTEM INDEX
M OVERALL ELECTRICAL WIRING DIAGRAM
2004 LAND CRUISER (EWD548U)
412
SYSTEMS LOCATION SYSTEMS LOCATION
Air Conditioning (Front) 31-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Conditioning (Rear) 31-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Auto Antenna 28-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Glare-Resistant EC Mirror with Compass 15-3. . . . . . . . . . .
Back-Up Light 10-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Center Differential Lock 14-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charging 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cigarette Lighter 21-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Combination Meter 30-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cruise Control 5-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electronically Controlled Transmission and A/T Indicator 5-6. . . . . . . . . .
Engine Control 4-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Immobiliser System 4-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Wiper and Washer 18-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Garage Door Opener 15-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Horn 18-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Illumination 9-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mirror Heater 11-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Moon Roof 17-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Multi-Display (w/o Navigation System) 29-3. . . . . . . . . . . . . . . . . . . . . . .
Multiplex Communication System 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
* Automatic Light Control
* Door Lock Control
* Front Fog Light
* Headlight
* Interior Light
* Key Reminder* Light Auto Turn Off
* Power Window
* Theft Deterrent
* Wireless Door Lock Control
Navigation System 26-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Outlet 20-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Rear Quarter Window 11-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Seat 22-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Source 1~31-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Tilt and Power Telescopic 23-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radio and Player (w/ Navigation System) 26-5. . . . . . . . . . . . . . . . . . . . .
Radio and Player (w/o Navigation System) 27-3. . . . . . . . . . . . . . . . . . . .
Rear Window Defogger 11-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Wiper and Washer 19-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Control Mirror 16-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seat Belt Warning 25-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seat Heater 21-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shift Lock 24-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SRS 13-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Starting 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stop Light 10-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Taillight 8-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TOYOTA Parking Assist (Rear View Monitor) 26-12. . . . . . . . . . . . . . . . .
Trailer Towing 7-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn Signal and Hazard Warning Light 6-2. . . . . . . . . . . . . . . . . . . . . . . . . .
VSC 12-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2004 LAND CRUISER (EWD548U)
388J POWER SOURCE (Current Flow Chart)
FuseSystemPage
10AECU-B1
Multi-Display (w/o Navigation System)
Navigation System and TOYOTA Parking Assist
(Rear View Monitor)348
336
10AECU-IG1
Automatic Glare-Resistant EC Mirror with Compass
Automatic Light Control
Door Lock Control
Headlight
Interior Light
Key Reminder
Light Auto Turn Off
Moon Roof
Multi-Display (w/o Navigation System)
Multiplex Communication System
Navigation System and TOYOTA Parking Assist
(Rear View Monitor)
Power Window
Shift Lock
Theft Deterrent
VSC
Wireless Door Lock Control304
164
260
128
148
316
166
256
348
172
336
250
244
282
228
270
10AEFI OR ECD NO.2Engine Control108
10AGAUGE1
Air Conditioning (Front)
Center Differential Lock
Combination Meter
Cruise Control
Electronically Controlled Transmission and A/T Indicator
Engine Control
Illumination
Key Reminder
Multiplex Communication System
Navigation System and TOYOTA Parking Assist
(Rear View Monitor)
Power Rear Quarter Window
Seat Belt Warning356
246
350
222
212
108
142
316
172
336
306
320
15AA/C
Air Conditioning (Front)
Air Conditioning (Rear)
Seat Belt Warning356
366
320
15ACIGCigarette Lighter204
15APWR OUTLETPower Outlet206
15ARR WIPERRear Wiper and Washer200
15ASTOP
Cruise Control
Electronically Controlled Transmission and A/T Indicator
Engine Control
Multiplex Communication System222
212
108
172
*These are the page numbers of the first page on which the related system is shown.

2004 LAND CRUISER (EWD548U)
389J
FuseSystemPage
15ASTOP
Shift Lock
Stop Light
Trailer Towing
VSC244
156
158
228
20ADEFOGRear Window Defogger312
25ADOOR
Automatic Light Control
Door Lock Control
Headlight
Interior Light
Key Reminder
Light Auto Turn Off
Moon Roof
Multiplex Communication System
Power Window
Theft Deterrent
Wireless Door Lock Control164
260
128
148
316
166
256
172
250
282
270
25ASUN ROOFMoon Roof256
30ABATT CHARGETrailer Towing158
30ALH SEATPower Seat294
Cowl Side J/B RH (See Page 40)
FuseSystemPage
7.5AIGN
Cruise Control
Electronically Controlled Transmission and A/T Indicator
Engine Control
Engine Immobiliser System
SRS
VSC222
212
108
124
237
228
7.5AMET
Center Differential Lock
Charging
Combination Meter
Cruise Control
Electronically Controlled Transmission and A/T Indicator
Engine Control
Multiplex Communication System
Seat Belt Warning
SRS
VSC246
104
350
222
212
108
172
320
237
228
7.5ASECURITYMultiplex Communication System
Theft Deterrent172
282
10ADOME
Combination Meter
Garage Door Opener
Interior Light
Multiplex Communication System350
210
148
172
*These are the page numbers of the first page on which the related system is shown.

2004 LAND CRUISER (EWD548U)
390J POWER SOURCE (Current Flow Chart)
FuseSystemPage
10ADOMETheft Deterrent
Wireless Door Lock Control282
270
10AECU-B2
Air Conditioning (Front)
Air Conditioning (Rear)
Automatic Light Control
Center Differential Lock
Combination Meter
Cruise Control
Door Lock Control
Electronically Controlled Transmission and A/T Indicator
Engine Control
Engine Immobiliser System
Headlight
Interior Light
Key Reminder
Light Auto Turn Off
Multiplex Communication System
Navigation System and TOYOTA Parking Assist
(Rear View Monitor)
Power Tilt and Power Telescopic
Power Window
Seat Belt Warning
Theft Deterrent
VSC
Wireless Door Lock Control356
366
164
246
350
222
260
212
108
124
128
148
316
166
172
336
298
250
320
282
228
270
10AECU-IG2
Air Conditioning (Front)
Air Conditioning (Rear)
Auto Antenna
Navigation System and TOYOTA Parking Assist
(Rear View Monitor)
Power Tilt and Power Telescopic
Turn Signal and Hazard Warning Light356
366
322
336
298
134
10AGAUGE2
Back-Up Light
Center Differential Lock
Combination Meter
Cruise Control
Door Lock Control
Electronically Controlled Transmission and A/T Indicator
Engine Control
Multiplex Communication System
Navigation System and TOYOTA Parking Assist
(Rear View Monitor)
Trailer Towing
VSC
Wireless Door Lock Control162
246
350
222
260
212
108
172
336
158
228
270
*These are the page numbers of the first page on which the related system is shown.

2004 LAND CRUISER (EWD548U)
391J
FuseSystemPage
10ARADIO
Auto Antenna
Navigation System and TOYOTA Parking Assist
(Rear View Monitor)
Radio and Player (w/ Navigation System)
Radio and Player (w/o Navigation System)322
336
324
330
15ASEAT HTRSeat Heater308
15AWASHERFront Wiper and Washer
Rear Wiper and Washer196
200
20ADIFFCenter Differential Lock246
20AP/W (FL)
Door Lock Control
Interior Light
Multiplex Communication System
Power Window
Theft Deterrent
Wireless Door Lock Control260
148
172
250
282
270
20AP/W (FR)Multiplex Communication System
Power Window172
250
20AP/W (RL)Multiplex Communication System
Power Window172
250
20AP/W (RR)Multiplex Communication System
Power Window172
250
20ATIL & TELPower Tilt and Power Telescopic298
25AWIPERFront Wiper and Washer196
30ARH SEATPower Seat294
30ARR A/CAir Conditioning (Rear)366
Fusible Link Block (F15, F16, F17, F18, F19 on See Page 68)
FuseSystemPage
50AHTRAir Conditioning (Front)356
120AJ/B NO.1
Automatic Light Control
Illumination
Light Auto Turn Off
Multiplex Communication System
Taillight
Theft Deterrent164
142
166
172
138
282
120AJ/B NO.2
Air Conditioning (Rear)
Engine Control
Mirror Heater
Rear Window Defogger
Shift Lock366
108
314
312
244
120AJ/B NO.3Engine Control108
120AMAIN
Ignition
Multiplex Communication System
Starting100
172
98
*These are the page numbers of the first page on which the related system is shown.

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