Mitsubishi Montero (1998+). Manual - part 32

Fig. 13:  Using SRS Check Harness To Test Clockspring

Courtesy of Mitsubishi Motor Sales of America.

         WIRING DIAGRAMS

Fig. 14:  SRS Wiring Diagram

ANTI-LOCK BRAKE SAFETY PRECAUTIONS 

1998 Mitsubishi Montero

         GENERAL INFORMATION

         Anti-Lock Brake Safety Precautions

         * PLEASE READ THIS FIRST *

         This article is intended for general information purposes

only. This information may not apply to all makes and models. If

vehicle is equipped with Anti-Lock Brake System (ABS), refer to

appropriate ANTI-LOCK BRAKE SYSTEM article in the BRAKES section for

description, operation, depressurizing, testing, system bleeding,

trouble shooting and servicing of specific system.

WARNING: Failure to depressurize ABS could lead to physical injury.

         ANTI-LOCK BRAKE SAFETY PRECAUTIONS

WARNING: Failure to depressurize ABS could lead to physical injury.

      *  NEVER open a bleeder valve or loosen a hydraulic line

         while ABS is pressurized.

      *  NEVER disconnect or reconnect any electrical connectors

         while ignition is on. Damage to ABS control unit may result.

      *  DO NOT attempt to bleed hyudarulic system without first

         referring to the appropriate ANTI-LOCK BRAKE SYSTEM article

         in the BRAKES section.

      *  Only use specially designed brake hoses/lines on ABS equipped

         vehicles.

      *  DO NOT tap on speed sensor components (sensor, sensor rings).

         Sensor rings must be pressed into hubs, NOT hammered into

         hubs. Striking these components can cause demagnetization or

         a loss of polarization, affecting the accuracy of the speed

         signal returning to the ABS control unit.

      *  DO NOT mix tire sizes. Increasing the width, as long as tires

         remain close to the original diameter, is acceptable. Rolling

         diameter must be identical for all 4 tires. Some

         manufacturers recommend tires of the same brand, style and

         type. Failure to follow this precaution may cause inaccurate

         wheel speed readings.

      *  DO NOT contaminate speed sensor components with grease. Only

         use recommended coating, when system calls for an

         anti-corrosion coating.

      *  When speed sensor components have been removed, ALWAYS check

         sensor-to-ring air gaps when applicable. These specifications

         can be found in each appropriate article.

      *  ONLY use rocommended brake fluids. DO NOT use silicone brake

         fluids in an ABS equipped vehicle.

      *  When instlling transmittion devices (CB’s, telephones, etc.)

         on ABS equipped vehicles, DO NOT locate the antenna near the

         ABS control unit (or any control unit).

      *  Disconnect all on-board computers, when using electric

         welding equipment.

      *  DO NOT expose the ABS control unit to prolonged periods of

         high heat (185  F/85 C for 2 hours is generally considered a

         maximum limit).

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

Application                                                   Sequence

Montero  .......................................  RR, LR, LSPV, RF, LF