1998 TOYOTA LAND CRUISER brake sensor
[x] Cancel search: brake sensorPage 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 873 of 3115
R07880
F04443
DI-620- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEM
813 Author: Date:
2004 LAND CRUISER (RM1071U)
6 Check sensor rotor and sensor tip.
Front:
PREPARATION:
Remove the front axle hub (See page SA-12).
CHECK:
Check the sensor rotor serrations.
OK:
No scratches, missing teeth or foreign matter.
PREPARATION:
Remove the front speed sensor (See page BR-69).
CHECK:
Check the sensor tip.
OK:
No scratches or foreign matter on the sensor tip.
HINT:
If foreign matter (including that on the sensor rotor side) is iden-
tified, remove it and after reassembling, check the output ware-
form.
Rear:
PREPARATION:
Remove the rear axle shaft (See page SA-84).
CHECK:
Check the sensor rotor serrations.
OK:
No scratches, missing teeth or foreign matter.
PREPARATION:
Remove the rear speed sensor (See page BR-72).
CHECK:
Check the sensor tip.
OK:
No scratches or foreign matter on the sensor tip.
HINT:
If foreign matter (including that on the sensor rotor side) is iden-
tified, remove it and after reassembling, check the output ware-
form.
NG Replace speed sensor or rotor.
NOTICE:
Check the speed sensor signal last (See page DI-505).
OK
Check and replace skid control ECU.
Page 882 of 3115
F17760
ABS & BA & TRAC
& VSC ECU J/B No. 7 D1
DLC1
Cowl Side J/B LH Cowl Side
J/B RHTS TS
E1
TS
CGA42 7D
7B
IF
2D II EB3BW
W-BW W
W-B W-B
W-B
1D7
DLC3
18
4 166
2
512
3
127D
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-653
846 Author: Date:
2004 LAND CRUISER (RM1071U)
Ts Terminal Circuit
CIRCUIT DESCRIPTION
The sensor check circuit detects abnormalities in the speed sensor signal which cannot be detected by the
DTC check.
Connecting terminals Ts and E
1 of the DLC1 starts the check.
WIRING DIAGRAM
DICAD-01
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 895 of 3115
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-519
712 Author: Date:
2004 LAND CRUISER (RM1071U)C1238 / 38
(DI-615)
Foreign matter is attached on the tip of the right rear sensorRight front, left front, right rear, left rear speed sensor
C1239 / 39
(DI-615)Foreign matter is attached on the tip of the left rear sensor
Right front, left front, right rear, left rear s eed sensor
Sensor rotor
C1241 / 41
(DI-558)Low battery positive voltage or abnormally high battery
positive voltageBattery
IC regulator
Power source circuit
C1242 / 42*2
(DI-561)Open in IG2 circuit
Battery
IC regulator
Power source circuit
C1243 / 43
(DI-564)Malfunction in deceleration sensor (constant output)Deceleration sensor
Wire harness for deceleration sensor system
C1244 / 44
(DI-567)Open or short in deceleration sensor circuitDeceleration sensor
Deceleration sensor circuit
C1245 / 45
(DI-564)Malfunction in deceleration sensorDeceleration sensor
Wire harness for deceleration sensor system
C1246 / 46
(DI-570)Malfunction in master cylinder pressure sensorMaster cylinder pressure sensor
Master cylinder pressure sensor circuit
C1249 / 49
(DI-573)Open in stop light switch circuitStop light bulb
Stop light switch circuit
C1251 / 51*2
(DI-577)
Pump motor is locked
Open circuit in pump motor groundHydraulic brake booster pump motor
C1252 / 52*2
(DI-580)Hydraulic brake booster pump motor malfunction
Hydraulic brake booster pump motor
Hydraulic brake booster pump motor circuit
Pressure switch (PH or PL)
C1253 / 53*2
(DI-586)Hydraulic brake booster pump motor relay malfunction
ABS motor1 or ABS motor 2 relay
ABS motor1 or ABS motor 2 relay circuit
Hydraulic brake booster pump motor circuit
C1254 / 54*2
(DI-592)Pressure switch malfunctionPressure switch (PH or PL)
Pressure switch circuit
C1256 / 56*2
(DI-595)Accumulator low pressure malfunction
Accumulator
Pressure switch (PH or PL)
Hydraulic brake booster pump motor
C1257 / 57*2
(DI-602)Power supply drive circuit malfunction
Battery
Power source circuit
Skid control ECU
C1203 / 59
(DI-536)ECM communication circuit malfunction
TRC+ or TRC- circuit
ENG+ or ENG- circuit
ECM
C1268 / 68
(DI-605)Transfer L4 position signal transmission failureTransfer L4 position switch
Transfer L4 position switch circuit
Always ON
(DI-621)Malfunction in skid control ECU
Battery
IC regulator
Power source circuit
Skid control ECU
*1: As the DTC cannot be erased by replacing parts alone do either of the following operations.
(1) Clear the DTC (See page DI-505).
(2) At a speed of 20 km/h (12 mph), drive the vehicle for 30 sec. or more.
*
2: Using the following table, troubled parts can be specified.
Page 897 of 3115
- DIAGNOSTICSABS & VEHICLE STABILITY CONTROL (VSC) &
BRAKE ASSIST (BA) SYSTEMDI-521
714 Author: Date:
2004 LAND CRUISER (RM1071U)
DTC chart of VSC:
DTC No.
(See Page)Detection ItemTrouble Area
C1231 / 31
(DI-546)Malfunction in steering angle sensorSteering angle sensor
Steering angle sensor circuit
C1232 / 32
(DI-551)Malfunction in deceleration sensorDeceleration sensor
Deceleration sensor circuit
C1233 / 33
(DI-553)Open or short in yaw rate sensor circuitYaw rate sensor
Yaw rate sensor circuit
C1234 / 34
(DI-553)Malfunction in yaw rate sensorYaw rate sensor
Yaw rate sensor circuit
C1335 / 35
(DI-546)Open circuit in steering angle sensorSteering angle sensor
Steering angle sensor circuit
C1210 / 36
(DI-538)Zero point calibration of yaw rate sensor undone
Yaw rate sensor
Yaw rate sensor circuit
PNP switch circuit (P position)
C1336 / 39
(DI-609)Zero point calibration of deceleration sensor undone
Deceleration sensor
Deceleration sensor circuit
PNP switch (P position) circuit
C1223 / 43
(DI-540)Malfunction in ABS control systemABS control system
C1224 / 44
(DI-541)Open or short in NE signal circuit
NEO circuit
ECM
Skid control ECU
C1290 / 66
(DI-608)Zero point calibration of steering sensor undoneSteering angle sensor zero point calibration
Yaw rate sensor zero point calibration
C1340 / 47
(DI-612)Open circuit in center differential lock signalCenter differential lock system
Center differential lock circuit
C1201 / 51
(DI-535)ECM system malfunctionEngine control system
C1203 / 53
(DI-536)ECM communication circuit malfunction
TRC+ or TRC- circuit
ENG+ or ENG- circuit
ECM
Always ON
(DI-627)Malfunction in skid control ECU
Open in VSC TRAC warning light circuitPower source circuit
VSC TRAC warning light circuit
HINT:
There is a case that TOYOTA hand-held tester cannot be used when the VSC TRAC warning light is always
on.
Page 898 of 3115
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.
Page 899 of 3115
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