1986 TOYOTA LAND CRUISER park assist

F16083
Cowl Side J/B RH
I18
Ignition SW ABS & BA
& TRAC
& VSC Actuator
Cowl Side J/B LH
Engine Room J/B
F15
FL Block
AM2
P8
Parking
Brake
SW Battery BrakeBRL A435
Y-G
3A 11
3Q6
SB
3E4 MET
3Q7
SB C1419
C1210
C151
C1420
2B20IX1
A A
A4213 2Q36
A40
LBL2
Y-G
2KR-W 27AM2 2A10
1B9
EC 2
MAIN6
IG2J4
J/CB-R Combination Meter
1 W-R
B-G
BR 8
SBSB
2E
2B41
4SB
7
PKB
R-W
1C1W-R
B-RABS & BA & TRAC
& VSC ECU
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-635
828 Author
: Date
:
2004 LAND CRUISER (RM1071U)
BRAKE Warning Light Circuit
CIRCUIT DESCRIPTION
The BRAKE warning light lights up while the brake fluid is insufficient and EBD is abnormal.
WIRING DIAGRAM
DICA7-02

DI-636- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
829 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
1 Check parking brake switch circuit (See page BE-63).
NG Repair or replace parking brake switch circuit.
OK
2 Check brake fluid level warning switch circuit (See page BE-63).
NG Repair or replace brake fluid level warning
switch circuit.
OK
3 Is DTC output for ABS?
YES Repair circuit indicated by the output code.
NO
4 Do the warning lights other than BRAKE warning light come on?
YES Go to step 6.
NO

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.

F17604
DIC8S-02
F02201N09214F05476
DLC1
E1
Tc
TcDLC3
CG
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-505
698 Author
: Date
:
2004 LAND CRUISER (RM1071U)
PRE-CHECK
1. DIAGNOSIS SYSTEM
(a) Check the warning lights and buzzer.
(1) Release the parking brake lever.
(2) When the ignition switch is turned ON, check that
the ABS, VSC TRAC and BRAKE warning lights,
VSC OFF, SLIP and TRAC indicator lights come on
for 3 sec.
(3) When depressing the brake pedal repeatedly, it
may turn on the ABS, VSC TRAC and BRAKE warn-
ing lights, VSC OFF indicator light and buzzer.
HINT:

If the ECU stores DTC, the ABS, VSC TRAC and BRAKE
warning lights and VSC OFF indicator light come ON.

If the indicator check result is not normal, proceed to trou-
bleshooting for the ABS warning light circuit, VSC TRAC
warning light circuit, brake warning light circuit, VSC OFF
indicator light circuit, SLIP indicator light circuit and AC-
TIVE TRAC indicator light circuit.
Trouble AreaSee Page
ABS warning light circuitDI-627
VSC TRAC warning light circuitDI-631
BRAKE warning light circuitDI-635
VSC OFF indicator light circuitDI-645
SLIP indicator light circuitDI-639
TRAC indicator light circuitDI-642
(b) In case of not using hand-held tester:
Check the DTC.
(1) Using SST, connect terminals Tc and E
1 of the
DLC1 or Tc and CG of the DLC3.
SST 09843-18020 or 09843-18040
(2) Turn the ignition switch ON.
(3) Read the DTC from the ABS or VSC TRAC warning
light on the combination meter.
HINT:

If no code appears, inspect the Tc circuit, ABS or VSC
TRAC warning light circuit.
Trouble AreaSee page
Tc circuitDI-651
ABS warning light circuitDI-627
VSC TRAC warning light circuitDI-631

F06425
Hand-held
Tester
DLC3
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-507
700 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(e) In case of using hand-held tester:
Clear the DTC.
(1) Hook up the hand-held tester to the DLC3.
(2) Turn the ignition switch ON.
(3) Operate the hand-held tester to erase the codes.
(See the hand-held tester operator's manual.)
2. DATA LIST
HINT:
According to the DATA LIST displayed by the hand-held tester, you can read the value of the switch, sensor,
actuator and so on without parts removal. Reading the DATA LIST as a first step of troubleshooting is one
of the methods to shorten labor time.
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch ON.
(c) According to the display on the tester, read the ºDATA LISTº.
ItemMeasurement Item/Range
(Display)Normal Condition*Diagnostic Note
HB MOT RELAYHB Motor relay status/
ON or OFF--
ABS MOT RELAYMotor relay status/ ON or OFF--
SOL RELAYSolenoid relay status/
ON or OFF--
PRESS HIGH
HIGH Hydraulic brake boost pres-
sure/ ON or OFF
--
PRESS LOWLOW Hydraulic brake boost
pressure/ ON or OFF--
VSC/TRC OFF SWVSC OFF switch/ ON or OFF--
IDLE SWMain idle switch/ ON or OFFON: Accelerator pedal released
OFF: Accelerator pedal depressed-
STOP LIGHT SWStop light switch/ ON or OFFON: Brake pedal released
OFF: Brake pedal depressed-
PKB SWPKB sw/ ON or OFFON: Parking brake applied
OFF: Parking brake released-
ABS OPERT FRFront Right wheel operation/
BEFORE or OPERATEBEFORE: No ABS operation (FR)
OPERATE: During ABS operation
(FR)
-
ABS OPERT FLFront Left wheel operation/
BEFORE or OPERATEBEFORE: No ABS operation (FL)
OPERATE: During ABS operation
(FL)
-
ABS OPERT RRRear Right wheel operation/
BEFORE or OPERATEBEFORE: No ABS operation (RR)
OPERATE: During ABS operation
(RR)
-
ABS OPRET RLRear Left wheel operation/
BEFORE or OPERATEBEFORE: No ABS operation (RL)
OPERATE: During ABS operation
(RL)
-
WHEEL SPD FRFront Right wheel speed /
Min.: 0km/h, Max.: 326.4 km/hActual wheel speedSpeed indicated on speedometer

DI-524- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
717 Author
: Date
:
2004 LAND CRUISER (RM1071U) BZ (A42 - 2) - GND (A41 - 6,
31, A42 - 8, 17)
L - W-BIG switch ON, VSC buzzer sound can be heardBelow 1.5 V
D/G (A42 - 3) - GND (A41 - 6,
31, A42 - 8, 17)V-W - W-BIG switch ON10 to 14 V
P (A42 - 5) - GND (A41 - 6,
31, A42 - 8, 17)G-W - W-BIG switch ON, shift lever is in P position10 to 14 V
IG1 (A42 - 6) - GND (A41 - 6,
31, A42 - 8, 17)B-W - W-BIG switch ON10 to 14 V
NEO (A42 - 7) - GND (A41 -
6, 31, A42 - 8, 17)W - W-BEngine idlingPulse generation
STP (A42 - 10) - GND (A41 -GW WBStop light switch pushed in10 to 14 VSTP (A42 10) GND (A41
6, 31, A42 - 8, 17)G-W - W-BStop light switch released2 to 5 V
Tc (A42 - 11) - GND (A41 - 6,PB WBIG switch ON and terminals Tc-E1 of DLC1 connectedBelow 1.0 VTc (A42 11 ) GND (A41 6,
31, A42 - 8, 17)P-B - W-BIG switch ON and terminals Tc-E1 of DLC1 not connected10 to 14 V
Ts (A42 - 12) - GND (A41 - 6,WWBIG switch ON and terminals Ts-E1 of DLC1 connectedBelow 1.0 VTs (A42 12) GND (A41 6,
31, A42 - 8, 17)W - W-BIG switch ON and terminals Ts-E1 of DLC1 not connected10 to 14 V
PKB (A42 - 13) - GND (A41 -RW WBIG switch ON, parking brake switch ONBelow 1.5 VPKB (A42 13) GND (A41
6, 31, A42 - 8, 17)R-W - W-BIG switch ON, parking brake switch OFF10 to 14 V
ENG+ (A42 - 14) - ENG -
(A42 - 22)R - GIG switch ONPulse generation
RL+ (A42 - 18) - RL- (A42 -
19)R - GIG switch ON, slowly turn left rear wheelAC generation
RR+ (A42 - 20) - RR- (A42 -
21)B - WIG switch ON, slowly turn right rear wheelAC generation
TRC+ (A42 - 24) - TRC- (A42
- 16)Y - LIG switch ONPulse generation
EXI2 (A43 - 2) - GND (A41 -BL WBIG switch ON, transfer in L4 position8 to 14 VEXI2 (A43 2) GND (A41
6, 31, A42 - 8, 17)B-L - W-BIG switch ON, transfer in any position except L4Below 1.5 V
EXI (A43 - 3) - GND (A41 - 6,PB WBIG switch ON, center diff. lock switch ONBelow 2.0 VEXI (A43 3) GND (A41 6,
31, A42 - 8, 17)P-B - W-BIG switch ON, center diff. lock switch OFF10 to 14 V
VSCW (A43 - 4) - GND (A41 -LW WBIG switch ON, VSC TRAC warning light ONBelow 2.0 VVSCW (A43 4) GND (A41
6, 31, A42 - 8, 17)L-W - W-BIG switch ON, VSC TRAC warning light OFF10 to 14 V
BRL (A43 - 5) - GND (A41 - 6,YG WBIG switch ON, BRAKE warning light ON10 to 14 VBRL (A43 5) GND (A41 6,
31, A42 - 8, 17)Y-G - W-BIG switch ON, BRAKE warning light OFFBelow 2.0 V
IND (A43 - 6) - GND (A41 - 6,LB WBIG switch ON, SLIP indicator light ONBelow 2.0 VIND (A43 6) GND (A41 6,
31, A42 - 8, 17)L-B - W-BIG switch ON, SLIP indicator light OFF10 to 14 V
WT (A43 - 7) - GND (A41 - 6,LR WBIG switch ON, VSC OFF indicator light ONBelow 2.0 VWT (A43 7) GND (A41 6,
31, A42 - 8, 17)L-R - W-BIG switch ON, VSC OFF indicator light OFF10 to 14 V
VYS (A43 - 9) - GYAW (A43 -
27)B - W-RIG switch ON4.5 to 5.5 V
GL2 (A43 - 10) - GYAW (A43 -
27)Y - PIG switch ON, vehicle is placed on the horizontal surface2.0 to 3.0 V
SS1+ (A43 - 14) - SS1- (A43 -
23)W - GEngine idling, slowly turn steering wheelPulse generation
(See page DI-546)
INFR (A43 - 15) - GND (A41 -BR WBIG switch ON, ACTIVE TRAC indicator light ONBelow 1.5 VINFR (A43 15) GND (A41
6, 31, A42 - 8, 17)B-R - W-BIG switch ON, ACTIVE TRAC indicator light OFF10 to 14 V
YD (A43 - 19) - GND (A41 - 6,
31, A42 - 8, 17)L - W-BApprox. 1 sec. after IG switch ON4.5 to 5.3 V

*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
9
101112
26 LAND CRUISER (
Cont' d)(
Cont. next page)
R3 6(
A)
, R37(
B)
, R38(
C)
Ig1 18 Ig1 17 Ig1 20 Ig1 19 Ig1 15 Ig1 16 Ig1 21 Ig1 22 Ig1 42A 7MUTE
AAMP+
3A
1B
AMP
B- R B- R
RR
37 FL
9R
G
B
BR Y
R
G
17 A SGND
16
SGNDB 11
GNDB 10
R. RB 14 5 B
F. LIg1 20GND
A
ID4 40 ID4 39
T1 41 23BC3 BC32
B Y
3 BA3 BA32
B Y
37 ID4 38 ID4
B
Y
34
B O WP (
Shielded)(
Shielded)
Y
P
W
O
7A
+B +B 2A 16 2B
L- R
L- B
L- Y
L- W
BR BR BR
R19
LG
ACC WFR-WFR+ WFL - WFL +IV4
F. R R. L MUTE
GND2 EFR+FR-
B Y
WF - WF+ WF- WF+W 4
3 1 4 2
Rear Side Under
the Front
Pas senger' s SeatBLA 12 A13
L
31 IV4 32 IV44A 11A
YRL- RL+
B
12RRR+ RR-
WA 10 A 8 A 1
IV3 2 IV3 116 IV32Id2
L- Y L- Y
L- Y
GR L- Y L- YL- WL- Y L- B
L- R L- R
L- B
L- Y
A 14 A 5 A 15 A 635 IV4 36 IV4
B 6 4B
BEEPA 8FR
BR
33 41
L
LGL2
F 9 LGA 3AFL + FL -
A 9L
LG L
LG
1IY2 IY2 2
12 21ID4 18 A
IV4 ABEEP
19
BR
BR
RL
A
L- W
12 B42
13 B
R2 0ID4
4D 11 10 4D 2 4E 4E7 34E11 A 10 A 12 AIG ACCB1
GR
B- WL- W
B- W
L- W
P
V B- W
J
L
N
QK
M
O
P
R C A
E
GB
FL- W
L- Y
GR
B- W
GR
L- Y
W
B
(
Shielded)
L
P
BR
SB
GR
GRA
S 6(
A)
, S 7(
B)
G
H
I
J
K
L
M
N
O
Radio and Player (
w/ Navigation System)
VB- W
P
W
B
(
Shielded)
L
P
SB
GRE
F GR
L- Y M 5(
A)
, M 6(
B)
, M 7(
C)
S
T
P
Q W- B
W- B W- B
W- BFr ont Door
Speaker RHMulti- Display
Rear Door
Speaker LHRe ar Doo r
Speak er RH Stereo Component Amplifier
Twee ter RHWoof er (
Speak er)
Radio and Play er
Navigation System,
TOYOTA Parking Assist
(
Rear View Monitor)
ID
HB- W
GR
L- YB B- W
C GR
D L- Y