ANTI-LOCK BRAKE SYSTEM
1998 Mitsubishi Montero
1997-98 BRAKES
Mitsubishi - Anti-Lock
Montero
DESCRIPTION
CAUTION: See ANTI-LOCK BRAKE SAFETY PRECAUTIONS article in GENERAL
INFORMATION.
NOTE: For more information on brake system, see BRAKE SYSTEM
article.
The Anti-Lock Brake System (ABS) is designed to prevent wheel\
lock-up during heavy braking. This allows operator to maintain
steering control while stopping vehicle in shortest distance possible.
Major components are a hydraulic unit, wheel speed sensors, "G"
sensor, ABS Electronic Control Unit (ECU) and ANTI-LOCK warning light.\
ABS has a self-diagnostic system to indicate a system malfunction and
for use in system trouble shooting.
OPERATION
Each wheel sensor sends an AC electrical signal to the ECU.
The ECU reads this information as wheel speed. When any decelerating
wheel speed rate is determined to be excessive in comparison to other
monitored wheels, the hydraulic unit cycles hydraulic brake pressure
to each wheel to equalize speed of all wheels. ABS turns itself off
when vehicle drops to 4 MPH. Minor lock-up may occur at this point.
With engine running and vehicle speed greater than 4 MPH,
pump motor will operate for a short period of time and may be heard
inside vehicle. During pump motor operation, ABS system is completing
a self-check. During ABS system operation, a pulsing brake pedal and
vibration in steering wheel and vehicle body may be experienced. These
conditions are normal.
BLEEDING BRAKE SYSTEM
BLEEDING PROCEDURES
CAUTION: When adding brake fluid, ensure filter is properly fitted on
reservoir tank.
ABS system is bled using conventional method. With engine
running, manually bleed system using an assistant. For bleeding order,
see BRAKE LINE BLEEDING SEQUENCE table. Ensure Load Sensing
Proportioning Valve (LSPV) is bled in sequence. Remove all air from
brake system. Refill brake fluid reservoir after bleeding procedure is
complete.
BRAKE LINE BLEEDING SEQUENCE
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Application Sequence
Montero ....................................... RR, LR, LSPV, RF, LF
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Removal & Installation (3000GT AWD)
1) Raise and support vehicle. Remove front wheels. Remove
clip, brake pad retaining pins and spring. See Fig. 17. Remove shims
and pads from caliper. Keep track of location of shims for reassembly.
2) Compress caliper pistons fully in bores. Install shims on
brake pads. Install brake pads. Install spring clip, pad retaining
pins and clip. Start engine and depress brake pedal several times to
expand caliper piston. Check brake fluid level.
FRONT BRAKE CALIPER
Removal
Raise and support vehicle. Remove front wheels. Remove hose
clip from brake hose mount (if equipped). Disconnect brake hose from
caliper. Remove upper and lower caliper-to-steering knuckle bolts.
Lift caliper body upward. Remove caliper.
Installation
To install, reverse removal procedure. Tighten bolts to
specification. See TORQUE SPECIFICATIONS . Bleed brake system. See
BLEEDING BRAKE SYSTEM .
FRONT BRAKE ROTOR
Removal & Installation (Except Montero & Montero Sport)
Raise vehicle, and remove wheel(s). Remove caliper. See
FRONT BRAKE CALIPER . Slide rotor off hub. To install, reverse removal
procedure.
Removal (Montero & Montero Sport)
Raise and support vehicle. Remove brake caliper. See
FRONT BRAKE CALIPER . On 4WD, remove Remove bearing grease cap, snap
ring, shim, 6 bolts and drive flange from axle shaft. On 2WD remove 6
bolts and hub cover. Remove screw(s) from lock washer. Remove lock
washer. Remove lock nut using Lock Nut Wrench (MB990954). Remove hub
assembly. Place match marks on rotor and hub. Remove rotor from front
hub.
Installation
1) Install rotor on hub. Service wheel bearings and seals as
necessary. Install front hub assembly. Install lock nut, and tighten
it to 119 ft. lbs. (165 N.m). Loosen lock nut, and retighten it to 18
ft. lbs. (24 N.m). Loosen lock nut 30-40 degrees. Install lock washer
and screw(s).
2) On 2WD, reverse removal procedure for remaining
components. On 4WD, install drive flange, shim and snap ring. Using
feeler gauge, check axle shaft-to-hub clearance. Clearance should be
0.016-0.028" (0.41-0.71 mm). Use appropriate shim to obtain correct
clearance. Shim is located behind snap ring on end of axle shaft.
Recheck clearance if necessary. Install remaining components.
PARKING BRAKE SHOES
Removal & Installation (Diamante)
1) Raise and support vehicle. Remove rear wheels. Remove rear
disc brake caliper and rotor. If rotor removal is difficult, rotate
rotor until hole in rotor is upward. Back-off brake shoe adjustment
with a flat blade screwdriver through hole in rotor.
2) Disconnect rear speed sensor. See Fig. 9. Remove 4 bolts
and hub. Remove screw and shoe hold-down spring. Remove shoe. To
install, reverse removal procedure. Adjust brake shoe by turning
adjuster star wheel.
purge control valve, or vacuum hose routing.
DTC P0443
Evaporative (EVAP) purge control valve circuit failure.
Possible causes are: connector or harness, or faulty EVAP solenoid.
DTC P0446
Evaporative (EVAP) emission control system vent control
failure. Possible causes are: connector or harness, faulty EVAP vent
solenoid.
DTC P0450
Evaporative (EVAP) emission control system pressure sensor
failure. Possible causes are: connector or harness, or faulty fuel
tank differential pressure sensor.
DTC P0455
Evaporative (EVAP) emission control system large leak
detected. Possible causes are: connector or harness, faulty EVAP purge
solenoid, purge control valve, or vacuum hose routing.
DTC P0500
Vehicle Speed Sensor (VSS) failure. Possible causes are:
connector or harness, or faulty VSS.
DTC P0505
Idle Air Control (IAC) system failure. Possible causes are:
connector or harness, or faulty IAC motor.
DTC P0510
Closed Throttle Position (TP) switch failure. Possible causes\
are: connector or harness, or faulty closed TP switch.
DTC P0551
Power Steering Pressure (PSP) sensor failure. Possible causes\
are: connector or harness, or faulty PSP sensor.
DTC P0705
Automatic transaxle/transmission range sensor circuit
failure. Possible causes are: connector or harness, or faulty PNP
switch.
DTC P0710
Automatic transaxle/transmission fluid sensor failure.
Possible causes are: connector or harness, or faulty
transaxle/transmission sensor.
DTC P0715
Automatic transaxle input/turbine speed sensor circuit
failure. Possible causes are: connector or harness, or pulse
generator.
DTC P0720
Automatic transaxle input/turbine speed sensor circuit
failure. Possible causes are: connector or harness, or pulse
generator.
DTC P0725
Engine speed input circuit failure. Possible causes are:
connector or harness.
DTC P0740
Torque converter clutch system failure. Possible causes are:
2) Disconnect pressure hose from oil pump. See Fig. 45.
Install Adapter (MB990993) on oil pump. Install Adapter (MB990994) o\
n
disconnected hose. Connect Pressure Gauge (MB990662) and shutoff valve\
between adapters. Open shutoff valve. Bleed steering hydraulic system.
See HYDRAULIC SYSTEM BLEEDING in STEERING SYSTEM article.
Fig. 45: Testing PSP Sensor Circuit
Courtesy of Mitsubishi Motor Sales of America
3) Install a thermometer in fluid reservoir. Start engine and
allow it to idle. Turn steering wheel several times until fluid
temperature reaches 122-140
F (50-60C). Disconnect PSP switch
connector. Install a DVOM between ground and PSP switch terminal. See
Fig. 45 . Note continuity reading on DVOM. Go to next step.
4) With engine idling, gradually close shutoff valve to
increase power steering system pressure. Check pressure when PSP
switch is actuated by watching for a change in continuity. PSP switch
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Engine Oil Ambient Temperature Less Than SAE 5W-30
(
1) 0\bF (-18\bC) To 100\bF (38\bC)
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Ambient Temperature Above 0\bF SAE 10W-30
(-18\bC) To Over 100\bF (38\bC)
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Power All Automatic Transmission
Steering Fluid DEXRON II
Fluid
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Engine All 50/50 Mixture Of
Coolant Distilled Water &
Ethylene Glycol
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Transfer Case All API Classification GL-4
SAE 75W-85W Or 75W-90
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Front Axle All API Classification GL-5
Or Higher (
2)
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Clutch Fluid All DOT 3 Or DOT 4
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Hook Lock All Multipurpose Grease
Catch, Door NLGI Grade 2
Lock Strikers
Seat Adjust-
ers, Backdoor
Lock, Parking
Brake Cable
Mechanism
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Front Wheel All Multipurpose Grease
Bearings NLGI Grade 2 Or
Equivalent
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Door Hinges, All Engine Oil
Back Door
Hinges
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A/C All HFC-134a
Refrigerant
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Manual All API Classification GL-4
Transmission SAE 75W-85W Or 75W-90
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Automatic All "ATF DEXRON II" Or
Transmission Equivalent
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Brake Fluid All DOT 3 Or DOT 4
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Rear Axle All API Classification GL-5
Or Higher (
2)
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(
1) - SAE 5W-30 engine oil is preferred. SAE 10W-30 may be used if
the Ambient Temperature is above 0\b F (-18\b C).
(
2) - SAE90, 85W-90, 80W-90 may be used in temperatures above
-10\b F (-23\b C). SAE 80W, 80W-90 may be used in temperatures
from -30\b F (-34\b C) to -10\b F (-23\b C). SAE 75W may be used
in temperatures below -30\b F (-34\b C).
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