1986 TOYOTA LAND CRUISER ignition

F17752
ABS & BA & TRAC
& VSC ECU Y1
Yaw Rate Sensor
ShieldedGL1
GL2
YD
VYS
YAW
GYAW
YSS A43
1827 289 191022
G
Y
L
B
W
R 4
2
6
8
1
5A43
A43
A43
A43
A43
A43 IG4
IG4
IG4
IG4
IG4
IG4
IG416
17
21
19
20
18
22
ShieldedG
Y
L
B
W
R GL1
GL2
YD
VYS
YAW 2
GYAW
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-609
802 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC C1336 / 39 Zero Point Calibration of Deceleration
Sensor Undone
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C1236 / 39
When either of the following 1. or 2. is detected:
1. In TEST mode, the shift lever is shifted to other than P
position within 2 sec. after ECU terminal IG1 is turned
ON for the first time.
2. When the deceleration sensor zero point recorded in
ECU is deleted.

Deceleration sensor

Deceleration sensor circuit

PNP switch circuit (R position)
WIRING DIAGRAM
INSPECTION PROCEDURE
1 Check whether zero point calibration of yaw rate (deceleration) sensor has been
done or not.
PREPARATION:
Shift the shift lever in the P position and turn the ignition switch ON. Repeat connecting and releasing Ts
and E
1 terminals of the DLC1 4 times or more for 8 sec. After this, turn the ignition switch OFF and after
connecting terminals Ts and E
1, turn it ON again.
DICA1-01

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

F17614
EXI
(-)
(+) ON
DI-614- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
807 Author
: Date
:
2004 LAND CRUISER (RM1071U)
5 Check voltage between terminal EXI of skid control ECU and body ground.
PREPARATION:
Remove the skid control ECU with connectors still connected.
CHECK:
(a) Turn the ignition switch ON.
(b) Measure voltage between terminal EXI of the skid control
ECU and body ground when the transfer is in the L4 posi-
tion.
OK:
Voltage: 10 to 14 V
NG Repair or replace harness or connector.
OK
6 Check transfer indicator switch (See page TR-49).
NG Replace transfer indicator switch.
OK
Check and replace skid control ECU.

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.

F04508
LOCK
12
12RH Side LH Side
2
4
4 2
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-617
810 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 in case of using the hand-held tester and start from step 2 in case of not
using the hand-held tester.
1 Check output value of speed sensor.
PREPARATION:
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch ON and push the hand-held tester main switch ON.
(c) Select the DATALIST mode on the hand-held tester.
CHECK:
Check that there is no difference between the speed value output from the speed sensor displayed on the
hand-held tester and the speed value displayed on the speedometer when driving the vehicle.
OK:
There is almost no difference from the displayed speed value.
HINT:
There is tolerance of ± 10 % in the speedometer indication.
OK Go to step 4.
NG
2 Check speed sensor.
Front:
PREPARATION:
(a) Make sure that there is no looseness at the connector's
locking part and connecting part of the connector.
(b) Disconnect the speed sensor connector.
CHECK:

LH side:
Measure resistance between terminals 2 and 4 of the
speed sensor connector.

RH side:
Measure resistance between terminals 1 and 2 of the
speed sensor connector.
OK:
Resistance: 0.92 to 1.22 kW
CHECK:

LH side:
Measure resistance between terminals 2 and 4 of the
speed sensor connector and body ground.

RH side:
Measure resistance between terminals 1 and 2 of the
speed sensor connector and body ground.

F17775
ABS & BA & TRAC
& VSC ECU
IND A43 IG1 12
L-B L-B
IU412
SB
C13 Combination Meter
15
Slip
2E 41
2A 10 Cowl Side J/B LH Engine Room J/B
1B9AM2
1C1
I18
Ignition SW
AM2 IG2 W-RB-R
6
7
C1210
SB
3Q7MET
3E4 Cowl Side J/B RH
B-RJ4
J/C
AA
C151
SB
IX18
BR
EC
F152
MAIN FL Block
Battery6
W-R
B-G
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-639
832 Author
: Date
:
2004 LAND CRUISER (RM1071U)
SLIP Indicator Light Circuit
CIRCUIT DESCRIPTION
The SLIP indicator blinks during VSC operation.
WIRING DIAGRAM
DICA8-02

F05490
E1
Tc (-) (+) DLC1 ONON
DLC3
(-) (+)
Tc
CG
DI-652- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
845 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
1 Check voltage between terminals Tc and E1 of DLC1 or Tc and CG of DLC3.
CHECK:
(a) Turn the ignition switch ON.
(b) Measure voltage between terminals Tc and E1 of the
DLC1 or Tc and CG of the DLC3.
OK:
Voltage: 10 to 14 V
OK If ABS warning light does not blink even after Tc
and E
1 are connected, the ECU may be defec-
tive.
NG
2 IG switch OFF, and check for open and short circuit in harness and connector
between skid control ECU and DLC1 or DLC3, DLC1 or DLC3 and body ground
(See page IN-36).
NG Repair or replace harness or connector.
OK
Check and replace skid control ECU.

F17759
INFR Combination Meter
Cowl Side J/B RH
Engine Room J/B
Cowl Side J/B LHI18
Ignition SW
FL Block
MAIN TRAC15
A43 IG1 IU4
C13 C12
MET
AM2
9 1
F15 3E 3Q
1C1B
2A2E IG2AM2
Battery SB
B-R B-R
B-R B-R SB
W-R
21041 6
7 A AJ4
J/C
B-GABS & BA & TRAC
& VSC ECU
W-R 13 13 18 10
74 DI-642
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
835 Author
: Date
:
2004 LAND CRUISER (RM1071U)
TRAC Indicator Light Circuit
CIRCUIT DESCRIPTION
The TRAC indicator light blinks during TRAC operation.
WIRING DIAGRAM
DICA9-02