1998 TOYOTA LAND CRUISER differential

F17776
ABS & BA & TRAC
& VSC ECU
Cowl Side J/B RH
Combination Meter
Cowl Side J/B RH
Cowl Side J/B LHI18
Ignition SW
Engine Room J/B
FL Block BatteryEXI
A433
P-B
3B3 3Q56SB 2
IX1
2 1 W-B
C1210
C1314
SB
W-B
EC
MAIN
F152
B-G1C1 AM2
1B9
W-R 2A 10
2E41
W-R
7AM2IG2
6A
AJ4
J/C
SB
3E4 MET
3Q73Q 28
SB P-B
B-R Center
Diff. LockD4
Detection SW
(Center Diff. Lock) DI-612
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
805 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC C1340 / 47 Center Differential Lock Circuit
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C1240 / 47Open or short in center differential lock circuit.
Center differential lock system

Center differential lock circuit
WIRING DIAGRAM
DICA2-01

- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-613
806 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
1 Check that the center differential is free and center diff. lock switch is OFF.
NG Repair the center differential lock system.
OK
2 Is DTC output?
Check the DTC on page DI-505.
NO END
YES
3 Check that bulb for center diff. lock indicator light is not burnt out.
NG Replace indicator light.
OK
4 Check for open circuit in harness and connector between battery and center diff.
lock indicator light, center diff. lock indicator light and skid control ECU (See
page IN-36).
NG Repair or replace harness or connector.
OK

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.

F17756
ABS & BA & TRAC
& VSC ECU
Cowl Side J/B RH Cowl Side J/B RH
Cowl Side J/B RH
I18
Ignition SW
Engine Room J/BCowl Side J/B LHCombination Meter
Cowl Side J/B LH
IG1 No.2 Relay
J/B No.2
MAIN
FL Block ECD4 Detection SW
(Center Diff. Lock)
BatteryVSC OFF
IFEC EXI
IG2
IG1
WT A43
A44
A42
A43 IX1
IGN
MET
IG1
AM2
AM1 ECU-IG1
ALTP-B
B-R
B-W
L-R
SB
BR SB
IX1
W-R B-R
SB
B-R
B-R L-B
B-R W-R
W-R
B-G
B-G3
A
AJ4
J/C
C15
C12
C13 3E
3B
3Q3Q
3B
3Q 3B
1C 1B 2A 2E
2E
2E 2B
2C
F1522
6
7 26
14 56
3 SB2
P-B
422
7
2
74
6
1910 41
2
1
5 37
18
391
217 101 W-B
IG2 AM1
AM28 2 1
3
F161
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-645
838 Author
: Date
:
2004 LAND CRUISER (RM1071U)
VSC OFF Indicator Light, Center Diff Lock Switch Circuit
CIRCUIT DESCRIPTION
This is the VSC control main switch. When the center differential is locked, VSC control goes off and the VSC
OFF indicator light lights up.
WIRING DIAGRAM
DICAA-02

- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-521
714 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC chart of VSC:
DTC No.
(See Page)Detection ItemTrouble Area
C1231 / 31
(DI-546)Malfunction in steering angle sensor
Steering angle sensor

Steering angle sensor circuit
C1232 / 32
(DI-551)Malfunction in deceleration sensor
Deceleration sensor

Deceleration sensor circuit
C1233 / 33
(DI-553)Open or short in yaw rate sensor circuit
Yaw rate sensor

Yaw rate sensor circuit
C1234 / 34
(DI-553)Malfunction in yaw rate sensor
Yaw rate sensor

Yaw rate sensor circuit
C1335 / 35
(DI-546)Open circuit in steering angle sensor
Steering angle sensor

Steering angle sensor circuit
C1210 / 36
(DI-538)Zero point calibration of yaw rate sensor undone

Yaw rate sensor

Yaw rate sensor circuit

PNP switch circuit (P position)
C1336 / 39
(DI-609)Zero point calibration of deceleration sensor undone

Deceleration sensor

Deceleration sensor circuit

PNP switch (P position) circuit
C1223 / 43
(DI-540)Malfunction in ABS control systemABS control system
C1224 / 44
(DI-541)Open or short in NE signal circuit

NEO circuit

ECM

Skid control ECU
C1290 / 66
(DI-608)Zero point calibration of steering sensor undone
Steering angle sensor zero point calibration

Yaw rate sensor zero point calibration
C1340 / 47
(DI-612)Open circuit in center differential lock signal
Center differential lock system

Center differential lock circuit
C1201 / 51
(DI-535)ECM system malfunctionEngine control system
C1203 / 53
(DI-536)ECM communication circuit malfunction

TRC+ or TRC- circuit

ENG+ or ENG- circuit

ECM
Always ON
(DI-627)Malfunction in skid control ECU
Open in VSC TRAC warning light circuit
Power source circuit

VSC TRAC warning light circuit
HINT:
There is a case that TOYOTA hand-held tester cannot be used when the VSC TRAC warning light is always
on.

- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-373
566 Author
: Date
:
9. PROBLEM SYMPTOM CONFIRMATION
Taking into consideration the results of the customer problem analysis, try to reproduce the symptoms. If the
problem is that the transmission does not shift up, shift down, or the shift point is too high or too low, conduct
the following road test referring to the automatic shift schedule and simulate the problem symptoms.
10. ROAD TEST
NOTICE:
Perform the test at normal operating ATF temperature 50 to 80°C (122 to 176°F).
(a) D position test (NORM and PWR pattern):
Shift into the D position and fully depress the accelerator pedal and check the following points.
(1) Check up-shift operation.
Check that 1 " 2, 2 " 3, 3 " 4 and 4 " 5th up-shifts take place, and that the shift points conform
to the automatic shift schedule (See page SS-23).
HINT:

5th Gear Up-shift Prohibition Control (1. Coolant temp. is 55°C (131°F) or less. 2. Vehicle speed is
51 km/h (32 mph) or less.)

4th Gear Up-shift Prohibition Control (1. Coolant temp. is 40°C (104°F) or less. 2. Vehicle speed is
45 km/h (28 mph) or less.)

5th Gear Lock-up Prohibition Control (1. Brake pedal is depressed. 2. Coolant temp. is 60°C (140°F)
or less.)

When the 2nd start switch is on, there is no 1"2 up-shift and 2"1 down-shift.
(2) Check for shift shock and slip.
Check for shock and slip at the 1 " 2, 2 " 3, 3 " 4 and 4 " 5th up-shifts.
(3) Check for abnormal noises and vibration.
Drive in the D position lock-up or 5th gear and check for abnormal noises and vibration.
HINT:
The check for the cause of abnormal noises and vibration must be done very thoroughly as it could also be
due to loss of balance in the differential, torque converter clutch, etc.
(4) Check kick-down operation.
While running in the D position, 2nd, 3rd, 4th and 5th gears, check that the possible kick-down
vehicle speed limits for 2 " 1, 3 " 2, 4 " 3 and 5th " 4 kick-downs conform to those indicated
on the automatic shift schedule (See page SS-23).
(5) Check abnormal shock and slip at kick-down.
(6) Check the lock-up mechanism.

Drive in D position 5th gear, at a steady speed (lock-up ON) of about 70 km/h (43 mph).

Lightly depress the accelerator pedal and check that the engine speed does not change
abruptly.
If there is a big jump in engine speed, there is no lock-up.
(b) 4 position test:
Shift into the 4 position and fully depress the accelerator pedal and check the following points.
(1) Check up-shift operation.
Check that the 1 " 2, 2 " 3 and 3 " 4 up-shift takes place and that the shift point conforms
to the automatic shift schedule (See page SS-23).
HINT:

There is no 5th up-shift in the 4 position.

4th Gear Lock-up Prohibition Control (1. Brake pedal is depressed. 2. Coolant temp. is 60°C (140°F)
or less.)

*The titles given inside the components are the names of the terminals (terminal codes) and are not treated as being
abbreviations.
2004 LAND CRUISER (EWD548U)
17 ABBREVIATIONS D
ABBREVIATIONS
The following abbreviations are used in this manual.
A/C = Air Conditioning
A/T = Automatic Transmission
ABS = Anti-Lock Brake System
ACIS = Acoustic Control Induction System
BA = Brake Assist
DIFF. = Differential
DVD = Digital Versatile Disc
EC = Electrochromic
ECU = Electronic Control Unit
ESA = Electronic Spark Advance
ETCS-i = Electronic Throttle Control System-intelligent
EVAP = Evaporative Emission
IC = Integrated Circuit
J/B = Junction Block
LH = Left-Hand
R/B = Relay Block
RH = Right-Hand
SFI = Sequential Multiport Fuel Injection
SRS = Supplemental Restraint System
SW = Switch
TEMP. = Temperature
TRAC = Traction Control
VSC = Vehicle Stability Control
VSV = Vacuum Switching Valve
w/ = With
w/o = Without

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