1986 TOYOTA LAND CRUISER brake light

DI-638- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
831 Author
: Date
:
2004 LAND CRUISER (RM1071U)
7 Check BRAKE warning light.
Check if that the open circuit in the combination meter circuit (See page BE-58).
NG Repair brake warning light bulb or combination
meter assembly.
OK
8Check for short circuit in harness and connector between brake warning light and skid
control ECU (See page IN-36).
NG Repair or replace harness or connector.
OK
Check and repair skid control ECU.

- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-535
728 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC C1201 / 51 Engine Control System Malfunction
CIRCUIT DESCRIPTION
If trouble occurs in the engine control system, the ECU prohibits TRAC and VSC control.
DTC No.DTC Detecting ConditionTrouble Area
C1201 / 51
Conditions 1. and 2. continue for 5 sec.:
1. Engine speed: 500 rpm or more.
2. A trouble signal in the engine control system is input.
Engine control system
INSPECTION PROCEDURE
1 Check the DTC for the engine (See page DI-3).
*1Repair engine control system according to the
output code.
*
2
Check for ECM connected to malfunction in-
dicator light.
*
1: Output NG code
*
2: Malfunction indicator light remains ON
DIC99-01

- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-539
732 Author
: Date
:
2004 LAND CRUISER (RM1071U)
INSPECTION PROCEDURE
1 Check whether zero point calibration of yaw rate 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 that do not move the vehicle for 15 sec. or more.
CHECK:
Check that theºVSC TRACº warning light and ºVSC OFFº indicator light light up for 15 sec.
OK No problem.
NG
2 Check for open and short circuit in harness and connector between PNP switch
(P position) and skid control ECU and ECM (See page IN-36).
NG Repair or replace harness or connector.
OK
3 Check for open and short circuit in harness and connector between yaw rate
sensor and skid control ECU (See page IN-36).
NG Repair or replace harness or connector.
OK
4 Check yaw rate sensor (See page DI-553).
NG Replace yaw rate sensor.
OK
Check and replace skid control ECU.

DI-540- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
733 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC C1223 / 43 ABS Control System Malfunction
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C1223 / 43ABS control system is abnormal.ABS control system
INSPECTION PROCEDURE
1 Check the DTC for the ABS (See page DI-505).
*1Repair ABS control system according to the
code output.
*
2
Check for ECU connected to malfunction in-
dicator light.
*
1: Output NG code
*
2: Malfunction indicator light remains ON
DIC9E-01

F17752
ABS & BA & TRAC
& VSC 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
A42 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
GYAWABS & BA & TRAC
& VSC ECU
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-567
760 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC C1244 / 44 Deceleration Sensor Circuit
CIRCUIT DESCRIPTION
This sensor detects vehicle deceleration. The sensor signal is used in ABS & BA & TRAC & VSC control.
If the sensor functions abnormally, the ABS warning light comes on.
DTC No.DTC Detecting ConditionTrouble Area
C1244 / 44
Either of the following 1., 2., 3. or 4. is detected:
1. The condition that ECU terminals GL1 and GL2 values are
-1.5 G or less or 1.5 G or more continues for 1.2 sec. or
more.
2. The condition that the deceleration sensor terminal VGS
voltage is 4.4 V or less or 5.6 V or more continues for 1.2
sec. or more.
3. At a vehicle speed of 0 mph (0 km/h), after the difference of
output value between deceleration sensor terminals GL1
and GL2 becomes 0.6 G or more, and the condition that
does not become 0.4 G or less continues for 60 sec. or
more.
4. Deceleration sensor signal momentary open occurs for 7
times or more.

Deceleration sensor

Deceleration sensor circuit
WIRING DIAGRAM
DIC9Q-01

DI-572- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
765 Author
: Date
:
2004 LAND CRUISER (RM1071U)
3 Check for open and short circuit in harness and connector between master cyl-
inder pressure sensor and skid control ECU (See page IN-36).
NG Repair or replace harness or connector.
OK
Replace master cylinder pressure sensor.
4 Check whether or not the ECU terminal STP input voltage is changed when the
stop light switch is turned on and off.
NO Check the stop light switch circuit (See page
DI-573).
YES
Check and replace skid control ECU.

- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-573
766 Author
: Date
:
2004 LAND CRUISER (RM1071U)
DTC C1249 / 49 Stop Light Switch Circuit
CIRCUIT DESCRIPTION
DTC No.DTC Detecting ConditionTrouble Area
C1249 / 49
ECU terminal IG1 voltage is 9.5 to 17.2 V, ABS is in non-
operation, and an open in stop light switch circuit continues
for 0.3 sec. or more.
Stop light bulb

Stop light switch circuit
DIC9S-02

F17777F18531
ABS & BA & TRAC
& VSC ECU
S5
Stop Light SW
F16
Fl Block
H11
High Mounted
Stop Light STOP
R12
Rear Combination
Light RHSTP A4210
G-W
2B 23
2K 35
2D 35
2D31
2C
B-G1
ALT
J/B No.21 G-W
21
G-R
BP38
G-W
BH22
G-W
21W-B
BH2 5
W-B
BP3
6 3 5 G-W
G-W
BQ23
G-W G-W
31W-B
W-B
BQ2 10
G-W
31
W-B
BJ BM
BJ BK 3 5 BL48
G-W
BD27 G-W
W-B
W-B
W-B
W-BW-B
W-B G-W
BatteryR13
Rear Combination
Light RHR10
Rear Combination
Light LH
R11
Rear Combination Light LH
G-WCowl Side J/B LH
G-WG-W
W-B
3BH2
(*2)
(*1)
*1: w/ Navigation System
*2: w/o Navigation System DI-574
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
767 Author
: Date
:
2004 LAND CRUISER (RM1071U)
WIRING DIAGRAM