1998 TOYOTA LAND CRUISER brakes
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BO1KZ-04
BO0632
BO0633
15°
45°
- BODYSEAT BELT
BO-139
2713 Author: Date:
2004 LAND CRUISER (RM1071U)
INSPECTION
CAUTION:
Replace the seat belt assembly (outer belt, inner belt, bolts,
nuts or sill-bar) if it has been used in a severe impact. The
entire assembly should be replaced even if damage is not
obvious.
1. Except manual type:
RUNNING TEST (IN SAFE AREA)
(a) Fasten the front seat belts.
(b) Drive the car at 10 mph (16 km/h) and slam on the brakes.
Check that the belt locks and cannot be extended at this
time.
HINT:
Conduct this test in a safe area. If the belt does not lock, remove
the belt mechanism assembly and conduct the following static
check. Also, whenever installing a new belt assembly.
2. Driver 's seat belt (ELR):
STATIC TEST
(a) Make sure that the belt locks when pulled out quickly.
(b) Remove the locking retractor assembly.
HINT:
Before removing the pretensioner connector, be sure to read
the precautionary notice in the RS section.
(c) Tilt the retractor slowly.
(d) Make sure that the belt can be pulled out at a tilt of 15 de-
grees or less, and cannot be pulled out over 45 degrees
of tilt.
If a problem is found, replace the assembly.
3. Except driver's seat belt (ELR/ALR):
STATIC TEST
(a) Make sure that the belt locks when pulled out quickly.
(b) Remove the locking retractor assembly.
HINT:
Before removing the pretensioner connector, be sure to read
the precautionary notice in the RS section.
(c) Pull out the whole belt and measure the length of the
whole belt.
Then retract the belt slightly and pull it out again
(d) Make sure that the belt cannot be extended further.
If a problem is found, replace the assembly.
Page 597 of 3115
- BRAKETROUBLESHOOTING
BR-3
2139 Author: Date:
2004 LAND CRUISER (RM1071U) Noise from brakes
1. Pad (Cracked or distorted)
2. Installation bolt (Loose)
3. Disc (Scored)
4. Pad support plate (Loose)
5. Sliding pin (Worn)
6. Pad (Dirty)
7. Pad (Glazed)
8. Tension or return spring (Faulty)
9. Anti-squeal shim (Damaged)
10.Shoe hold-down spring (Damaged)BR-15
BR-24
BR-18
BR-27
BR-21
BR-30
BR-24
BR-27
BR-15
BR-24
BR-15
BR-24
BR-33
BR-15
BR-24
BR-33
Noise from hydraulic brake booster
(Abnormal pump motor operation noise)Accumulator bracket clearance (Out of adjustment)BR-66
Brake warning light lights up*1
(Parking brake pedal released)
1. Brake fluid level
2. Hydraulic brake booster power supply system (Faulty)-
BR-40
Brake warning light lights up and brake warning buzzer sounds*2Hydraulic brake booster power supply system (Faulty)BR-40
ABS warning light lights up*31. Anti - lock brake system (Faulty)
2. Hydraulic brake booster power supply system (Faulty)-
BR-40
*1, *3: The light may stay on for about 60 seconds after the engine is started. It is normal if it goes out after
a while.
*
2, *3: Depressing the brake pedal repeatedly may turn on the warning light and buzzer. It is normal if the
light goes off and the buzzer stops sounding after a few seconds.
*
3: While ABS warning light is ON.
Page 945 of 3115
DI-424
- DIAGNOSTICSAUTOMATIC TRANSMISSION
617 Author: Date:
2004 LAND CRUISER (RM1071U)
DTC P0724 Brake Switch ºBº Circuit High
CIRCUIT DESCRIPTION
The purpose of this circuit is to prevent the engine from stalling, while driving in lock-up condition, when
brakes are suddenly applied.
When the brake pedal is operated, this switch sends a signal to ECM. Then the ECM cancels operation of
the lock-up clutch while braking is in progress.
DTC No.DTC Detection ConditionTrouble Area
P0724Stop light switch always turn on even vehicle is driver Go and
Stop 10 times. (2-trip detection logic)Short in stop light switch signal circuit
Stop light switch
ECM
MONITOR DESCRIPTION
When the stop light switch remains ON during ºstop and goº driving, the ECM interprets this as a fault in the
stop light switch and the MIL comes on and the ECM stores the DTC. The vehicle must stop and go (3 km/h
(2 mph) to 30 km/h (19 mph)) ten times for two driving cycles in order to detect malfunction.
MONITOR STRATEGY
Related DTCsP0724Stop light switch/Range check/Rationality
Rid /C tMainStop light switchRequired sensors/ComponentsSubVehicle speed sensor
Frequency of operationContinuous
DurationGO and STOP 10 times
MIL operation2 driving cycles
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
ItSpecificationItemMinimumMaximum
The monitor will run whenever the follow-
ing DTCs are not present.See page DI-361
The stop light switch remains on during GO and STOP 10 times.
GO and STOP are defined as follows;
GO: Vehicle speed30 km/h (19 mph) or more-
STOP: Vehicle speed-Less than 3 km/h (2 mph)
TYPICAL MALFUNCTION THRESHOLDS
Detection criteriaThreshold
Brake switch statusON stuck
WIRING DIAGRAM
See page DI-278.
DIB37-02
Page 974 of 3115
- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-453
646 Author: Date:
2004 LAND CRUISER (RM1071U)
DTC P0781 1-2 Shift
SYSTEM DESCRIPTION
The ECM uses signals from the vehicle speed sensor and direct clutch speed sensor to detect the actual
gear position (1st, 2nd, 3rd, 4th or 5th gear). Then the ECM compares the actual gear with the shift schedule
in the ECM memory to detect mechanical problems of the shift solenoid valves, valve body or automatic
transmission (clutch, brake or gear etc.).
DTC No.DTC Detecting ConditionTrouble Area
P0781The gear required by the ECM does not match the actual gear
when driving (2-trip detection logic)Valve body is blocked up or stuck (1-2 shift)
Automatic transmission assembly
ECM
MONITOR DESCRIPTION
The ECM calculates the ºactualº transmission gear by comparing the signals from the input speed sensor
and the output speed sensor. The ECM can detect many mechanical problems in the shift solenoids, valve
body, and the transmission clutches, brakes, and gears. If the ECM detects that the actual gear position and
the commanded gear position are different, it will illuminate the MIL and store the DTC.
MONITOR STRATEGY
Related DTCsP0781Valve body/Rationality check
MainValve body
Required sensors/ComponentsSubAutomatic transmission assembly, Speed sensor (NT), Speed sensor
(NO), Vehicle speed sensor, Throttle speed sensor
Frequency of operationContinuous
Condition (A) and (B)0.4 sec.
DurationCondition (C)3 sec.Duration
Condition (D)0.5 sec.
MIL operation2 driving cycles
Sequence of operationNone
DIB3D-02
Page 997 of 3115
D01769
DI-476
- DIAGNOSTICSAUTOMATIC TRANSMISSION
669 Author: Date:
2004 LAND CRUISER (RM1071U)
DTC P2714 Pressure Control Solenoid ºDº Performance
(Shift Solenoid Valve SLT)
SYSTEM DESCRIPTION
The ECM calculates the shifting condition by using the signals
from the vehicle speed sensor, throttle position sensor, etc..
And compares this result with the signal that ECM sends to SLT
to detect mechanical trouble of the shift solenoid valve SLT,
valve body, torque converter clutch and automatic transmission
assembly (clutch, brake or gear etc.).
DTC No.DTC Detecting ConditionTrouble Area
P2714
ECM detects a malfunction on SLT (ON side) according to the
revolution difference of the turbine and the output shaft, and
also by the oil pressure.Shift solenoid valve SLT is stuck open or closed
Valve body blocked up or stuck
Automatic transmission assembly
MONITOR DESCRIPTION
The ECM sends (ED: delete ºtheº) signals (Duty Ratio) to the shift solenoid valve SLT based on the informa-
tion such as the signal from throttle position sensor and the vehicle speed sensor.
Based on the signal's duty-ratio, the shift solenoid valve SLT adjusts the hydraulic pressure to the primary
regulator valve to an appropriate level. This function enables a smooth vehicle operation by adjusting the
line hydraulic pressure to match the engine output and running condition.
The ECM calculates the ºactualº transmission gear by comparing the signals from the input speed sensor
and the output speed sensor. The ECM can detect many mechanical problems in the shift solenoids, valve
body, and the transmission clutches, brakes, and gears. If the ECM detects that the actual gear position and
the commanded gear position are different, it will illuminate the MIL and store the DTC.
MONITOR STRATEGY
Related DTCsP2714Shift solenoid valve SLT/ON malfunction
MainShift solenoid valve SLT
Required sensors/ComponentsSubValve body, ATF temperature sensor, Speed sensor (NT), Speed sensor
(NO)
Frequency of operationContinuous
DurationImmediate
MIL operation2 driving cycles
Sequence of operationNone
DIB3J-02
Page 1008 of 3115
D01769
- DIAGNOSTICSAUTOMATIC TRANSMISSION
DI-487
680 Author: Date:
2004 LAND CRUISER (RM1071U)
DTC P2757Torque Converter Clutch Pressure Control Solenoid
Performance(Shift Solenoid Valve SLU)
SYSTEM DESCRIPTION
The ECM uses the signals from the Throttle Position Sensor
and Air-flow Meter to monitor the engagement condition of the
lock-up clutch.
Then the ECM compares the engagement condition of the
lock-up clutch with the lock-up schedule in the ECM memory
to detect mechanical trouble of the shift solenoid valve SLU,
valve body, torque converter clutch and automatic transmission
assembly (clutch, brake or gear etc.).
DTC No.DTC Detecting ConditionTrouble Area
P2757
Lock-up does not occur when driving in the lock-up range
(normal driving at 80 km/h [50 mph]), or lock-up remains ON
in the lock-up OFF range.
(2-trip detection logic)Shift solenoid valve SLU is stuck open or closed
Valve body blocked up or stuck
Lock-up clutch
Automatic transmission assembly
MONITOR DESCRIPTION
The ECM controls the oil pressure to the lock-up clutch based on engine-load information from the throttle
position sensor, crankshaft position sensor, input speed sensor, and the oil pressure sensor for shift-sole-
noid SLU. The ECM commands the shift-solenoid SLU using a duty-cycle control signal. In turn, the shift
solenoid operates the lock-up control valve and causes lock-up or flexible lock-up of the torque converter
clutch.
To monitor the condition of the lock up clutch, the ECM monitors the signals from the input speed sensor,
crank position sensor, the throttle position sensor, and air flow meter. The ECM uses this information to deter-
mine when the vehicle's torque converter clutch should be locked-up. The ECM can detect many mechani-
cal problems in the shift solenoids, valve body, and the transmission clutches, brakes, and gears. If the ECM
detects that the torque converter clutch locked below the minimum lock-up speed, it will illuminate the MIL
and store the DTC.
MONITOR STRATEGY
RltdDTCP2757Shift solenoid valve SLU/OFF malfunctionRelated DTCsP2757Shift solenoid valve SLU/ON malfunction
MainShift solenoid valve SLU
Required sensors/ComponentsSubValve body, Vehicle speed sensor, Throttle position sensor, Speed sensor
(NT), Speed sensor (NO)
Frequency of operationContinuous
DtiOFF malfunction2 sec.DurationON malfunction1.8 sec.
MIL operation2 driving cycles
Sequence of operationNone
DIB3L-02
Page 2241 of 3115
2004 LAND CRUISER (EWD548U)
234VSC
1. ABS Operation
If the brake pedal is depressed suddenly, the ABS controls the hydraulic pressure of the wheel cylinders for all the four
wheels to automatically avoid wheel locking and ensure the directional and steering stability of the vehicle. If the brake pedal
is depressed suddenly, the ABS & BA & TRAC & VSC ECU controls the solenoids in the actuators using the signals from the
sensors to move the brake fluid to the reservoir in order to release the braking pressure applied to the wheel cylinder. If the
ABS & BA & TRAC & VSC ECU detects that the fluid pressure in the wheel cylinder is insufficient, the ECU controls the
solenoids in the actuators to increase the braking pressure.
2. Traction Control Operation
The traction control system controls the engine torque, the hydraulic pressure of the driving wheel cylinders, slipping of the
wheels which may occur at start or acceleration of the vehicle, to ensure an optimal driving power and vehicle stability
corresponding to the road conditions.
3. VSC Operation
Unexpected road conditions, vehicle speed, emergency situation, and any other external factors may cause large under- or
over-steering of the vehicle. If this occurs, the VSC system automatically controls the engine power and wheel brakes to
reduce the under- or over-steering.
To reduce large over-steering :
If the VSC system determines that the over-steering is large, it activates the brakes for the outer turning wheels depending
on the degree of the over-steering to produce the moment toward the outside of the vehicle and reduce the over-steering.
To reduce large under-steering :
If the VSC system determines that the under-steering is large, it controls the engine power and activates the rear wheel
brakes to reduce the under-steering.
VSC indicator light
If an error occurs in the VSC system, the VSC indicator lights up to warn the driver.
4. Traction Mode and VSC Function
When the center differential of the transfer is locked, the VSC function is turned off. At this time, the VSC OFF indicator light
in the combination meter will come on, and informs the driver that the VSC function is OFF.
5. Mutual System Control
To efficiently operate the VSC system at its optimal level, the VSC system and other control systems are mutually controlled
while the VSC system is being operated.
Engine throttle control
The engine power does not interfere with the VSC brake control by controlling the opening of the throttle and reducing the
engine output.
Engine control and electronically controlled transmission control
The strong braking force does not interfere with the braking force control of the VSC system by turning off the accel. and
reducing changes in the driving torque at shift-down.
VSC system operation indication
The slip indicator light flashes and the buzzer sounds intermittently to warn the driver that the current road is slippery, while
the VSC system is being operated.
6. Fail Safe Function
If an error occurs in the ABS & BA & TRAC & VSC ECU, sensor signals, and/or actuators, the ABS & BA & TRAC & VSC
ECU inhibits the brake actuator control and inputs the error signal to the engine control module. According to the error signal,
the brake actuator turns off the solenoid and the engine control module rejects any electronically controlled throttle open
request from the VSC system. As a result, the vehicle functions without the ABS, BA, TRAC, and VSC systems.
System Outline
Page 2412 of 3115
B04698
B04696
Center Differential Lock
Indicator Light
Center Differential
Switch
Transfer Select
Lever
F08296
IN-20
- INTRODUCTIONFOR ALL OF VEHICLES
20 Author: Date:
2004 LAND CRUISER (RM1071U)
Transfer gear ºHº e ºLº gear shifting procedure:
When shifting, always put the shift lever of the transmis-
sion in N position. In other positions, the gears of the
transfer clash, and switching cannot be performed.
4. WHEN TESTING BRAKES, SPEEDOMETER, ETC.
(a) When carrying out any kind of servicing or testing on a
Full-time 4WD in which the front or rear wheels are to be
rotated (braking test, speedometer test), be sure to ob-
serve the precautions given below.
Incorrect preparations or test procedures may cause dan-
ger as well as unsuccessful test results.
Before starting any such servicing or test, be sure to
check the following items:
Center differential mode position (FREE or LOCK)
Vehicle skid control (VSC) system (with or without):
If the vehicle is equipped with the system, the slip
indicator light, the VSC/TRAC indicator light and the
VSC OFF indicator light come on with the ignition
key turned to ºONº. They will go off after about a few
seconds.
Whether wheels should be touching ground or
jacked up
Transmission gear position (N position)
Transfer gear position (H or L position)
Maximum testing vehicle speed
Maximum testing time
HINT:
w/o Vehicle skid control (VSC) system:
When the transfer select lever is put in ºLº position, the center
differential is put in LOCK condition regardless of the position
of the center differential lock switch.