1986 TOYOTA LAND CRUISER brake light

DIC8N-01
Vehicle Brought to Workshop
Customer Problem Analysis
P. DI-503
Check and Clear DTC (Precheck)
P. DI-505Items inside
are titles of pages in this manual,
with the page number in the bottom portion. See
the pages for detailed explanations.
Problem Symptom ConfirmationSymptom Simulation
P. IN-26
Symptom
does not occur
Symptom
occurs
DTC Check
P. DI-505
Sensor CheckCircuit Inspection
P. DI-615 - DI-653
DTC Chart
P. DI-518 Malfunction codeProblem Symptoms Table
P. DI-526
Check for Fluid Leakage
P. DI-655
Identification of Problem
Normal code
Repair
Confirmation Test
End
1
2
3
4
5
67
89
10
11
Step 2, 5, 8, 9, 11:
Diagnostic steps permitting the use of the
hand-held tester or break-out-box.
Fail safe function:
When a failure occurs in the ABS & BA & TRAC & VSC systems, the ABS and VSC warning lights are lit and
ABS & BA & TRAC & VSC operation is prohibited. In addition to this, when the failure which disables EBD opera-
tion occurs, the BRAKE warning light is lit as well and EBD operation is prohibited. DI-502
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
695 Author
: Date
:
2004 LAND CRUISER (RM1071U)
ABS & VEHICLE STABILITY CONTROL (VSC) & BRAKE
ASSIST (BA) SYSTEM
HOW TO PROCEED WITH TROUBLESHOOTING
Troubleshoot in accordance with the procedure on the following pages.

DIC8X-01
F17606
ABS Motor 1
Relay
ABS Motor 2
RelayABS Solenoid
Relay
Master Cylinder Pressure Sensor
Hydraulic Brake Booster
Check
Connector
Front Speed
Sensor Rotor
Front Speed Sensor
Engine Room J/BNeutral Start SwitchRear Speed Sensor
RotorRear Speed
Sensor
Steering Angle Sensor
Engine and ECT
ECU
Yaw Rate Sensor and
Deceleration Sensor DLC3
Stop Light Switch Skid Control ECU with
Warning Buzzer Combination Meter

ABS Warning Light

VSC TRC Warning Light

BRAKE Warning Light

VSC OFF Indicator Light

SLIP Indicator Light

ACTIVE TRC
Indicator Light
DI-522- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
715 Author
: Date
:
2004 LAND CRUISER (RM1071U)
PARTS LOCATION

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

R01346
Normal Code
0.25 sec.
0.25 sec. 2 sec.
ON
OFF
ON
OFF0.5 sec. 0.5 sec.
Code 11 and 21
4 sec.1.5 sec.
2.5 sec.
Code 11 Code 21
F06425
Hand-held
Tester
DLC3
F05576
DI-506- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
699 Author
: Date
:
2004 LAND CRUISER (RM1071U)

As an example, the blinking patterns for normal code and
codes 11 and 21 are shown on the left.
(4) Codes are explained in the code table on page
DI-518.
(5) After completing the check, disconnect terminals Tc
and E
1 of the DLC1 or Tc and CG of the DLC3 and
turn off the display.
If 2 or more malfunctions are indicated at the same time the low-
est numbered DTC will be displayed 1st.
(c) In case of using hand-held tester:
Check the DTC.
(1) Hook up the hand-held tester to the DLC3.
(2) Turn the ignition switch ON.
(3) Read the DTC by following the prompts on the tes-
ter screen.
HINT:
Please refer to the hand-held tester operator's manual for fur-
ther details.
(d) In case of not using hand-held tester:
Clear 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) Clear the DTC stored in the ECU by depressing the
brake pedal 8 or more times within 5 sec.
(4) Check that the warning light shows the normal
code.
(5) Remove the SST from the terminals of the DLC1 or
DLC3.
SST 09843-18020 or 09843-18040

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-510- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
703 Author
: Date
:
2004 LAND CRUISER (RM1071U)SRMF & SRMR
Turns ABS solenoid SRMF & SRMR ON / OFFOperation of solenoid (click-
ing sound) can be heard
SOL RELAYTurns ABS solenoid relay ON/OFFOperation of solenoid (click-
ing sound) can be heard
ABS MOT RELAYTurns ABS motor relay ON/OFFOperation of motor (clicking
sound) can be heard
TRAC MOT RELAYTurns TRC motor relay ON/OFFOperation of motor (clicking
sound) can be heard
ABS WARN LIGHTTurns ABS warning light ON / OFFObserve combination meter
VSC WARN LIGHTTurns VSC warning light ON / OFFObserve combination meter
VSC/ TRC OFF INDTurns VSC / TRC OFF indicator ON / OFFObserve combination meter
SLIP INDI LIGHTTurns SLIP indicator light ON / OFFObserve combination meter
BRAKE WRN LIGHTTurns BRAKE warning light ON / OFFObserve combination meter
VSC/BR WARN BUZTurns VSC / BRAKE warning buzzer ON / OFFBuzzer can be heard
4. FREEZE FRAME DATA
(a) The vehicle (sensor) status memorized during ABS and/or VSC operation or at the time of error code
detection can be displayed by the hand-held tester.
(b) Only one record of freeze frame data is stored and the freeze frame data generated during ABS and/or
VSC operation are constantly updated. Also, the number of the ignition switch's ºONº after the freeze
frame data is stored can be memorized up to 31 and it can be displayed.
HINT:
If the ignition switch ºONº operation exceeds 31 times, º31º appears on the display.
(c) If the diagnosis code abnormality occurs, the freeze frame data at the occurrence of the abnormality
is stored but the ABS actuation data is deleted.
Hand-held tester displayMeasurement ItemReference Value*
VEHICLE SPDWheel speed sensor readingSpeed indicated on speedometer
STOP LIGHT SWStop light switch signalStop light switch ON: ON, OFF: OFF
# IG ONNumber of operations of ignition switch ON after
memorizing freeze frame data0 - 31
MAS CYL PRESSMaster cylinder pressure sensor readingBrake pedal release : 0.3 to 0.9 V
Brake pedal depress: 0.8 to 4.5 V
MASS PRESS GRADEMaster cylinder pressure sensor change-30 to 200 MPa/s
SYSTEMSystem status
ABS activated: ABS
VSC/TRC activated: VSC/TRC
BA activated: BA
Fail safe mode activated: FAIL SF
No system activated: NO SYS
YAW R AT EYaw rate angle sensor reading-100 to 100
STEERING ANGSteering sensor readingLeft turn: Increase
Right turn: Drop
THROTTLEThrottle position sensor readingRelease accelerator pedal: Approx. 0 deg.THROTTLEThrottle position sensor readingRelease accelerator edal: A rox. 0 deg.
Depress accelerator pedal: Approx. 90 deg.
G (RIGHT & LEFT)Right and left G-1.869 to 1.869
G (BACK & FORTH)Back and forth G-1.869 to 1.869
VSC (TRC) OFF SWVSC OFF switch signalTRAC OFF SW ON: ON
OFF: OFF

F02201
DLC1 E1
TcTs
BR3904
0.13 sec. 0.13 sec.
ON
OFF
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-51 1
704 Author
: Date
:
2004 LAND CRUISER (RM1071U)Hand-held tester displayReference Value* Measurement Item
SHIFT POSITIONShift lever position
FAIL
P, N
R
D
4
3
2
L
THROTTLEThrottle sensor reading0 to 125 deg.
*: If no conditions are specifically stated for ºIdlingº, it means the shift lever is in the N or P position, the A/C
switch is OFF and all accessory switches are OFF.
5. SPEED SENSOR SIGNAL CHECK (TEST MODE)
HINT:

When replacing the yaw rate sensor or ECU, make sure
to perform a yaw rate sensor zero point calibration.

If the ignition switch is turned from the ON to the ACC or
LOCK position during test mode, DTC will be erased.
(a) In case of not using hand-held tester:
Check the speed sensor signal.
(1) Turn the ignition switch OFF.
(2) Using SST, connect terminals Ts and E
1 of the
DLC1.
SST 09843-18020
(3) Start the engine.
(4) Check that the ABS warning light blinks.
HINT:
If the ABS warning light does not blink, inspect the ABS warning
light circuit and Ts circuit (See page DI-627 and DI-653).
(5) Keep the vehicle in the stationary condition on the
flat place for 6 sec. or more.
(6) Shift the transfer lever in the L4 position and turn the
center diff. lock switch ON.
(7) Shift the transfer lever back.

BR3893
Malfunction Code (Example Code 72, 76)
72 6
7
ON
OFF
0.5 sec. 0.5 sec. 0.5 sec. 0.5 sec.1.5 sec.
2.5 sec. 4 sec.
Repeat DI-512
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
705 Author
: Date
:
2004 LAND CRUISER (RM1071U)
(8) Leaving the vehicle in the stationary condition and
the brake pedal in a free condition for 1 sec. or
more, continue to depress the brake pedal with a
force of 98 N (10 kgf, 22 lbf) or more for 1 sec. or
more.
(9) Leaving the vehicle in the stationary condition, de-
press the brake pedal with a force of 980 N (100 kgf,
221 lbf) or more quickly.
HINT:
At this time, the ABS warning light comes on for 3 sec.
(10) Drive the vehicle straight forward.
When driving the vehicle with a speed faster than 28
mph (45 km/h) for several seconds, check that the
ABS warning light goes off.
HINT:
There is a case that the sensor check is not completed if the ve-
hicle has its wheels spun or its steering wheel turned during this
check.
(11) Stop the vehicle.
(12) Using SST, connect terminals Tc and E
1 of the
DLC1 or Tc and CG of the DLC3.
SST 09843-18020 or 09843-18040
(13) Read the number of blinks of the ABS warning light.
HINT:

See the list of DTC on the next page.

If every sensor is normal, a normal code is output (A cycle
of 0.25 sec. ON and 0.25 sec. OFF is repeated).

If 2 or more malfunctions are indicated at the same time,
the lowest numbered code will be displayed 1st.
(14) After doing the check, disconnect the SST from ter-
minals of the DLC1 or terminals of the DLC1 and
DLC3, and turn the ignition switch OFF.
SST 09843-18020 or 09843-18040