ANTI-LOCK BRAKE SAFETY PRECAUTIONS

1988 Jeep Cherokee

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

maximum limit).

o F/85 o C for 2 hours is generally considered a