brake rotor TOYOTA LAND CRUISER 1996 J80 Workshop Manual

R05035
BR1NR−01
Z04921
W00552
R13587
R04759
BR−62
−
BRAKE FRONT SPEED SENSOR
1996 LAND CRUISER (RM451U)
INSPECTION
1. INSPECT SPEED SENSOR
(a) Disconnect the speed sensor connector.
(b) Measure the resistance between terminals FR+ and FR −,
and FL+ and FL−.
Resistance: 0.5 − 1.6 kΩ
If resistance value is not specified, replace the sensor.
(c) Check there is no continuity between each terminal and sensor body.
If there is continuity, replace the sensor.
(d) Connect the speed sensor connector.
2. INSPECT SENSOR INSTALLATION
Check the sensor installation bolt is tightened properly and
there is no clearance between the sensor and axle end.
If not, tighten the bolt. Torque: 18 N·m (185 kgf·cm, 13 ft·lbf)
3. VISUALLY INSPECT SENSOR ROTOR SERRATIONS
(a) Remove the axle hub with disc (See page SA−67).
(b) Inspect the sensor rotor serrations for scratches, cracks,
warping or missing teeth.
(c) Install the axle hub with disc SA−9 ).
NOTICE:
To prevent damage to the serrations, do not strike the axle
hub.
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BR1NO−01
R04775
−
BRAKE REAR SPEED SENSOR
BR−67
1996 LAND CRUISER (RM451U)
INSPECTION
1. INSPECT SPEED SENSOR
(a) Disconnect the speed sensor connector.
(b) Measure the resistance between terminals.
Resistance: 0.5 − 1.6 kΩ
If resistance value is not specified, replace the sensor.
(c) Check there is no continuity between each terminal and sensor body.
If there is continuity, replace the sensor.
(d) Connect the speed sensor connector.
2. INSPECT SENSOR INSTALLATION
Check the sensor installation bolt is tightened properly and
there is no clearance between the sensor and axle end.
If not, tighten the bolt. Torque: 18 N·m (185 kgf·cm, 13 ft·lbf)
3. VISUALLY INSPECT SENSOR ROTOR SERRATIONS
(a) Remove the brake disc (See page BR−40).
(b) Inspect the sensor rotor serrations for scratches, cracks,
warping or missing teeth.
(c) Install the brake disc.
NOTICE:
To prevent damage to the serrations, do not strike the axle
hub.
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−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
DI−195
1996 LAND CRUISER (RM451U)
(d) Check the DTC of speed sensor function.
Code No.DiagnosisTrouble Area
71Low output voltage of right front speed sensor
Right front speed sensor
 Sensor installation
 Sensor rotor
 Sensor wire harness
72Low output voltage of left front speed sensor
Left front speed sensor
 Sensor installation
 Sensor rotor
 Sensor wire harness
73Low output voltage of right rear speed sensor
Right rear speed sensor
 Sensor installation
 Sensor rotor
 Sensor wire harness
74Low output voltage of left rear speed sensor
Left rear speed sensor
 Sensor installation
 Sensor rotor
 Sensor wire harness
75Abnormal change in output voltage of right front speed sen-
sorRight front speed sensor rotor
 Sensor wire harness
76Abnormal change in output voltage of left front speed sen-
sorLeft front speed sensor rotor
 Sensor wire harness
77Abnormal change in output voltage of right rear speed sen-
sorRight rear speed sensor rotor
 Sensor wire harness
78Abnormal change in output voltage of left rear speed sensorLeft rear speed sensor rotor
 Sensor wire harness
79Deceleration sensor is faultyDeceleration sensor
 Sensor installation
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DI5LW−03
DI−196
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
1996 LAND CRUISER (RM451U)
DIAGNOSTIC TROUBLE CODE CHART
NOTICE:
When removing the part, turn the ignition switch OFF.
HINT:
Using SST 09843 −18020, connect the terminals Tc and E1, and remove the short pin.
If any abnormality is not found when inspection parts, inspect the ECU.
If a malfunction code is displayed during the DTC check, check the circu\
it listed that the code. For details
of each code, turn to the page referred to under the ”See page” for respective ”DTC N\
o.” in the DTC chart.
DTC No.
(See page)Detection Item Trouble Area
11
( DI−201 )Open circuit in ABS control (solenoid) relay circuitABS control (solenoid) relay
 Open or short in ABS control (solenoid) relay circuit
12
( DI−201 )Short circuit in ABS control (solenoid) relay circuitABS control (solenoid) relay
 B+ short in ABS control (solenoid) relay circuit
13
( DI−204 )Open circuit in ABS control (motor) relay circuitABS control (motor) relay
 Open or short in ABS control (motor) relay circuit
14
( DI−204 )Short circuit in ABS control (motor) relay circuitABS control (motor) relay
 B+ short in ABS control (motor) relay circuit
21
( DI−207 )Open or short circuit in 3 −position solenoid circuit for right front
wheel ABS actuator
 Open or short in SFR circuit
22
( DI−207 )Open or short circuit in 3− position solenoid circuit for left front
wheel ABS actuator
 Open or short in SFLcircuit
23
( DI−207 )Open or short circuit in 3− position solenoid circuit for rear
wheel ABS actuator
 Open or short in SRR circuit
31
( DI−210 )Right front wheel speed sensor signal malfunction
Right front, left front, right rear and left rear speed sensor
 Open or short in each speed sensor circuit
 Senser rotor32
( DI−210 )Left front wheel speed sensor signal malfunction
33
( DI−210 )Right rear wheel speed sensor signal malfunction
34
( DI−210 )Left rear wheel speed sensor signal malfunction
35
( DI−210 )Open circuit in left front or right rear speed sensor circuitOpen in left front or right rear speed sensor circuit
36
( DI−210 )Open circuit in right front or left rear speed sensor circuitOpen in right front or left rear speed sensor circuit
41
( DI−215 )Low battery positive voltage or abnormally high battery
positive voltageBattery
 IC regulator
 Open or short in power source circuit
43
( DI−218 )Malfunction in deceleration sensorDeceleration sensor
 Wire harness for deceleration sensor circuit
44
( DI−219 )Open or short in deceleration sensor circuitDeceleration sensor
 Open or short in deceleration sensor circuit
48
( DI−221 )Open or short circuit in center differential lock circuit
Center differential is lockingCenter differential lock
 Center differential lock circuit
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DI5LX−02
W03004
Rear Speed Sensor
Rear Speed Sensor Rotor
Front Speed Sensor
Stop Light Switch
ABS Warning Light
Deceleration Sensor
DLC1
ABS ECU
ABS Actuator
ABS Relay
Front Speed Sensor Rotor
DI−198
−
DIAGNOSTICS ANTI−LOCK BRAKE SYSTEM
1996 LAND CRUISER (RM451U)
PARTS LOCATION
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BR3583
BR3582F00010
RotorSpeed Sensor
Magnet
To ECU
+V
-V High Speed
Low Speed
Coil
N
S
-
DIAGNOSTICS ANTI-LOCK BRAKE SYSTEM
DI-210
1996 LAND CRUISER (RM451U)
DTC31, 32, 33, 34, 35, 36 Speed Sensor Circuit
CIRCUIT DESCRIPTION
The speed sensor detects wheel speed and sends the ap-
propriate signals to the ECU. These signals are used to control
the ABS system. The front and rear rotors each have 48 serra-
tions.
When the rotors rotate, the magnetic field emitted by the perma-
nent magnet in the speed sensor generates an AC voltage.
Since the frequency of this AC voltage changes in direct propor-
tion to the speed of the rotor, the frequency is used by the ECU
to detect the speed of each wheel.
DTC No.DTC Detecting ConditionTrouble Area
31, 32, 33, 34
Detection of any of conditions (1) through (3):
(1) At vehicle speed of 10 km/h (6 mph) or more, pulses are
not input for 5 sec.
(2) Momentary interruption of the speed sensor signal oc-
curs at least 7 times in the time between switching the igni-
tion switch ON and switching it OFF.
(3) Abnormal fluctuation of speed sensor signals with the
vehicle speed 20 km/h (12 mph) or more.

Right front, left front, right rear and left rear speed sensor

Open or short in each speed sensor circuit

Sensor rotor
35
Speed sensor signal is not input for about 1 sec. while
the left front and right rear speed sensor signals are being
checked with the IG switch ON.

Open in left front or right rear speed sensor circuit
36
Speed sensor signal is not input for about 1 sec. while
the right front and left rear speed sensor signals are being
checked with the IG switch ON.

Open in right front or left rear speed sensor circuit
HINT:

DTC No. 31 is for the right front speed sensor.

DTC No. 32 is for the left front speed sensor.

DTC No. 33 is for the right rear speed sensor.

DTC No. 34 is for the left rear speed sensor.
Fail safe function:
If trouble occurs in the speed sensor circuit, the ECU cuts off current to the ABS control (solenoid) relay and
prohibits ABS control.
DI5M3-02
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W04200
Normal Signal WaveformGND
2 ms/Division
1V/Division
DI-213
-
DIAGNOSTICS ANTI-LOCK BRAKE SYSTEM
1996 LAND CRUISER (RM451U)
2 Check for open and short in harness and connector between each speed sensor and ECU (See page IN-27).
NG Repair or replace harness or connector.
OK
3 Check speed sensor and rotor serrations.
Reference: INSPECTION USING OSCILLOSCOPE
PREPARATION:
(a) Remove the ABS ECU with connector still connected.
(b) Connect the oscilloscope to the terminals FR+, FL+, RR+ or RL+ and GND of the ABS ECU.
CHECK:
Drive the vehicle at 30 km/h (19 mph), and check the signal wa-
veform.
OK Turn the IG swithch OFF, check and replace ABS ECU.
NG
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R04759
R04775
BR3795
OKNG
-
DIAGNOSTICS ANTI-LOCK BRAKE SYSTEM
DI-214
1996 LAND CRUISER (RM451U)
4 Check sensor rotor and sensor installation.
Front
PREPARATION:
Remove front axle hub and knuckle spindle (See page
SA-8).
CHECK:
Check the sensor rotor serrations.
OK:
No scratches or missing teeth.
CHECK:
Check the sensor tip and grease.
OK:
No scratches or foreign objects on the sensor tip and
grease.
Rear
PREPARATION:
Remove the rear brake caliper and disc.
CHECK:
Check the sensor rotor serrations.
OK:
No scratches or missing teeth.
CHECK:
Check the sensor tip.
OK:
No scratches or foreign objects on the sensor tip.
CHECK:
Check the speed sensor installation.
OK:
The installation bolt is tightened properly and there is
no clearance between the sensor and steering
knuckle or rear axle carrier.
NG Replace speed sensor or rotor.
NOTICE:
Check the speed sensor signal last (See page DI-189).
OK
Check and replace ABS ECU.
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I00489
Cruise Control ECUL
L−
W−B
1
5
4 3
2 R
1026
C4 Stop Light Switch
4
R−G
Cruise
Control Actuator
C17
C17
C17
C4S13
S13 S13
S13
G−O G−WF11F11
1
2
STOP
Instrument Panel Fuse Block
W
EA3
W
3
1
F8
Battery Fusible Link
FL MAIN
STP−
DI−298
−
DIAGNOSTICS CRUISE CONTROL SYSTEM
1996 LAND CRUISER (RM451U)
DTC 12 Actuator Magnetic Clutch Circuit
CIRCUIT DESCRIPTION
This circuit turns on the magnetic clutch inside the actuator during cruise \
control operation according to the
signal from the ECU. If a malfunction occurs in the actuator or speed sensor, etc. during cruise control opera-
tion, the rotor shaft between the motor and control plate is released.
When the brake pedal is depressed, the stop light switch turns on, supplying electrical power to the stop light.
Power supply to the magnetic clutch is mechanically cut and the magnetic clut\
ch is turned OFF.
When driving downhill, if the vehicle speed exceeds the set speed by 15 km/h\
(9 mph), the ECU turns the
safety magnet clutch OFF. If the vehicle speed later drops to within 10 km/h (6 mph) above the\
set speed,
then cruise control at the set speed is resumed.
DTC No.Detection ItemTrouble Area
12 Short in actuator magnetic clutch circuit.
 Open (0.8 sec.) in actuator magnetic clutch circuit.
STOP Fuse
 Stop light switch
 Actuator magnetic clutch
 Harness or connector between cruise control ECU and
actuator magnetic clutch, actuator magnetic clutch and body
ground
 Cruise control ECU
WIRING DIAGRAM
DI5OC−02
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