1998 TOYOTA LAND CRUISER wheel
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F04506
LOCKON
PH
PHG
F06043
LOCK
PH
PHG
DI-598- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
791 Author: Date:
2004 LAND CRUISER (RM1071U)
3 Check pressure switch (PH) operation.
PREPARATION:
(a) Turn the ignition switch OFF, and depress the brake pedal
40 times or more.
HINT:
When pressure in the power supply system is released, reac-
tion force becomes light and stroke becomes longer.
(b) Install the LSPV gauge (SST) to the rear brake caliper
and bleed air.
SST 09709-29018
CHECK:
While checking the voltage between terminals PH and PHG of
the hydraulic brake booster, depress the brake pedal with a
force of more than 294 N (30 kgf, 66 lbf) and turn the ignition
switch ON, then check the rear wheel cylinder pressure when
voltage changes from 6 V to 0 V.
OK:
12,553 to 20,104 kpa (128 to 205 kgf´cm2, 1,820 to
2,916 psi)
PREPARATION:
Turn the ignition switch OFF and disconnect the connector (5P)
from the hydraulic brake booster.
CHECK:
While checking the resistance between terminals PH and PHG,
depress the brake pedal changing the force in a range of 197
N (20 kgf, 44 lbf) to 294 N (30 kgf, 66 lbf) and check the rear
wheel cylinder pressure when resistance changes from 0 kW to
1 kW between PH and PHG.
OK:
11,964 to 18,240 kpa (122 to 186 kgf´cm2, 1,735 to
2,645 psi)
HINT:
After inspection, connect the connector, fill brake reservoir with
brake fluid and clear the DTC (See page DI-505).
OK Go to step 5.
NG
Page 851 of 3115
F06042
LOCKON
PLG
PL
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-599
792 Author: Date:
2004 LAND CRUISER (RM1071U)
4 Check for open circuit in harness and connector between pressure switch (PH)
and skid control ECU (See page IN-36).
NG Repair or replace harness or connector.
OK
Replace hydraulic brake booster assembly.
5 Check pressure switch (PL) operation.
PREPARATION:
(a) Turn the motor switch OFF, and depress the brake pedal
40 times or more.
HINT:
When pressure in the power supply system is released, reac-
tion force becomes light and stroke becomes longer.
(b) Install the LSPV gauge (SST) to the rear brake caliper
and bleed air.
SST 09709 -29018
(c) Disconnect the connector (8P) from the hydraulic brake
booster.
CHECK:
While checking the resistance between terminals PL and PLG
of the hydraulic brake booster, depress the brake pedal with a
force of more than 294 N (30 kgf, 66 lbf) and turn the ignition
switch ON, then check the rear wheel cylinder pressure when
the resistance changes from 5.7 kW to 1.0 kW.
OK:
9,022 to 15,102 kpa (92 to 154 kgf´cm2, 1,308 to 2,190
psi)
PREPARATION:
Turn the ignition switch OFF and disconnect the connector (8P)
from the hydraulic brake booster.
CHECK:
While checking the resistance between terminals PL and PLG
of the hydraulic brake booster, depress the brake pedal chang-
ing the force in a range of 197 N (20 kgf, 44 lbf) to 294 N (30 kgf,
66 lbf) and check the rear wheel cylinder pressure when resis-
tance changes from 1.0 kW to 5.7 kW.
OK:
8,532 to 13,337 kpa (87 to 136 kgf´cm2, 1,237 to 1,934
psi)
Page 852 of 3115
DI-600- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
793 Author: Date:
2004 LAND CRUISER (RM1071U)
HINT:
After inspection, connect the connector, fill brake reservoir with
brake fluid and clear the DTC (See page DI-505).
NG Replace hydraulic brake booster assembly.
OK
6 Check pressure switch (PH) and pressure switch (PL)
CHECK:
Compare the pressure value of the rear wheel cylinder measured in check pressure switch (PL) operation
with the one measured in check pressure switch (PH) operation.
OK:
Pressure when the voltage between PH and PHG becomes 6 to 0 V > pressure when the resis-
tance between PL and PLG becomes 5.7 kW to 1.0 kW.
Pressure when the resistance between PH and PHG becomes 0 kW to 1 kW > pressure when
the resistance between PL and PLG becomes 1.0 kW to 5.7 kW.
NG Replace hydraulic brake booster assembly.
OK
Check and replace skid control ECU.
7 Check for open or short circuit in harness and connector between hydraulic
brake booster pump motor and hydraulic brake booster (See page IN-36).
NG Replace wire harness.
OK
Page 868 of 3115
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.
Page 872 of 3115
BR3795
OK NG
W04200
Normal Signal Waveform
1 V / Division2 m/s / DivisionGND
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-619
812 Author: Date:
2004 LAND CRUISER (RM1071U)
4 Check sensor installation.
CHECK:
Check the speed sensor installation.
OK:
The installation bolt is tightened properly and there is
no clearance between the sensor and front steering
knuckle or rear axle carrier.
Torque: 8.0 N´m (82 kgf´cm, 71 in.´lbf)
NG Replace speed sensor.
NOTICE:
Check the speed sensor signal last (See page DI-505).
OK
5 Check speed sensor and sensor rotor serrations.
(REFERENCE) INSPECTION USING OSCILLOSCOPE
PREPARATION:
(a) Remove the skid control ECU with connectors still con-
nected.
(b) Connect the oscilloscope to each of terminals FR+ - FR-,
FL+ - FL-, RR+ - RR- or RL+ - RL- of the skid control
ECU.
CHECK:
Drive the vehicle at about 12 mph (20 km/h), and check the sig-
nal waveform.
HINT:
As vehicle speed (rpm of the wheels) increase, a cycle of
the waveform narrows and the fluctuation in the output
voltage becomes greater.
When noise is identified in the waveform on the oscillo-
scope, error signals are generated due to the speed sen-
sor rotor's scratches, looseness or foreign matter depos-
ited on it.
OK Check and replace skid control ECU.
NG
Page 893 of 3115
Inspector 's
Name:
Customer 's Name
Date Vehicle
Brought InRegistration DateRegistration No.
Frame No.
Odometer Reading/ /
/ /
Date Problem First Occurred
Frequency Problem Occurs/ /
ContinuousIntermittent ( times a day)
TRAC does not operate. (Wheels spin when starting rapidly.)
DisplaysDoes not display
DTC Check1st Time
2nd TimeNormal Code
Malfunction Code (Code )
Normal CodeMalfunction Code (Code )
Symptomskm
miles
Light Abnormal TRAC OFF Indicator
Light Abnormal SLIP Indicator
Remains ONDoes not light up
Check Item
NormalMalfunction Code (Code )
NormalMalfunction Code (Code )
ABS Warning Light
Malfunction
Indicator Light TRAC & VSC Check Sheet
Remains ONDoes not light up
VSC does not operate. (Wheels sideslip at the time of sharp turning.)
VSC TRC Warning
Indicator Abnormal
Skid Control
Buzzer AbnormalDoes not soundSounds
VSC/TRC OFF SW
SYSTEMFreeze Frame Data
SHIFT POSITION
YAW RATON
OFF
VSC/TRC
P, NR
D
deg/s
VFAIL
23
4L
MAS CYL PRESS
THROTTLE
MAS PRESS GRADE
G (RIGHT&LEFT)
G (BACK&FORTH)
STEERING ANG
deg
deg
MPa/s
G
G DI-504
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
697 Author: Date:
2004 LAND CRUISER (RM1071U)
Page 894 of 3115
DIC8V-01
DI-518- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
711 Author: Date:
2004 LAND CRUISER (RM1071U)
DIAGNOSTIC TROUBLE CODE CHART
NOTICE:
When removing the part, turn the ignition switch OFF.
HINT:
Using SST 09843-18020 or 09843-18040, connect terminals Tc and E1 of the DLC1 or Tc and CG
of the DLC3.
If any abnormality is not found when inspecting parts, inspect the ECU.
If a malfunction code is displayed during the DTC check, check the circuit listed that code. For details
of each code, turn to the page referred to under the ºSee pageº for respective ºDTC No.º in the DTC
chart.
DTC chart of ABS:
DTC No.
(See Page)Detection ItemTrouble Area
C0278 / 11
(DI-531)Open or short in ABS solenoid relay circuitABS solenoid relay
C0279 / 12
(DI-531)B+ short in ABS solenoid relay circuit
ABS solenoid relay
ABS solenoid relay circuit
C0226 / 21
(DI-528)Open or short in hydraulic brake booster solenoid circuit (SFR
circuit)Hydraulic brake booster
SFRR or SFRH circuit
C0236 / 22
(DI-528)Open or short in hydraulic brake booster solenoid circuit (SFL
circuit)Hydraulic brake booster
SFLR or SFLH circuit
C0246 / 23
(DI-528)Open or short in hydraulic brake booster solenoid circuit (SRR
circuit)Hydraulic brake booster
SRRR or SRRH circuit
C0256 / 24
(DI-528)Open or short in hydraulic brake booster solenoid circuit (SRL
circuit)Hydraulic brake booster
SRLR or SRLH circuit
C1225 / 25
(DI-543)Open or short in hydraulic brake booster solenoid circuit (SA1
circuit)Hydraulic brake booster
SA1 circuit
C1226 / 26
(DI-543)Open or short in hydraulic brake booster solenoid circuit (SA2
circuit)Hydraulic brake booster
SA2 circuit
C1227 / 27
(DI-543)Open or short in hydraulic brake booster
solenoid circuit (SA3 circuit)Hydraulic brake booster
SA3 circuit
C1228 / 28
(DI-543)Open or short in hydraulic brake booster solenoid circuit (STR
circuit)Hydraulic brake booster
STR circuit
C0200 / 31*1
(DI-615)Right front wheel speed sensor signal malfunction
C0205 / 32*1
(DI-615)Left front wheel speed sensor signal malfunctionRight front, left front, right rear and left rear speed sensor
Eh d i itC0210 / 33*1
(DI-615)Right rear wheel speed sensor signal malfunction
Each speed sensor circuit
Sensor rotor
C0215 / 34*1
(DI-615)Left rear wheel speed sensor signal malfunction
C1235 / 35
(DI-615)Foreign matter is attached on the tip of the right front sensorRight front, left front, right rear, left rear speed sensor
C1236 / 36
(DI-615)Foreign matter is attached on the tip of the left front sensor
Right front, left front, right rear, left rear s eed sensor
Sensor rotor
C1237 / 37
(DI-557)Size of some tires is different from the other tiresTire size
Page 902 of 3115
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