both the non-antilock braking systems and antilock
braking systems. That means the left front and right
rear brakes are on one hydraulic circuit and the right
front and left rear are on the other.

For information on the brake lamp switch, (Refer

to 8 - ELECTRICAL/LAMPS/LIGHTING - EXTERI-
OR/BRAKE LAMP SWITCH - DESCRIPTION)

Optional antilock brakes are available with or

without

traction

control.

ABS

components

are

described in detail in ANTILOCK BRAKE SYSTEM.

DESCRIPTION - BASE BRAKES (EXPORT)

Four-Wheel Disc Antilock Brakes are standard on

all models.

OPERATION - BASE BRAKES

When a vehicle needs to be stopped, the driver

applies the brake pedal. The brake pedal pushes the
input rod of the power brake booster into the booster.
The booster uses vacuum to ease pedal effort as force
is transferred through the booster to the master cyl-
inder. The booster’s output rod pushes in the master
cylinder’s primary and secondary pistons applying
hydraulic pressure through the chassis brake tubes
to the brakes at each tire and wheel assembly.

The

parking

brakes

are

foot-operated.

When

applied, the parking brake lever pulls on cables that
actuate brake shoes at each rear wheel. These shoes
come in contact with a hub mounted drum (drum for
disc/drum brakes or drum-in-hat for disc/disc brakes)
and hold it in place.

BRAKES - BASE

5 - 3

WARNING

WARNING: DUST AND DIRT ACCUMULATING ON
BRAKE PARTS DURING NORMAL USE MAY CON-
TAIN ASBESTOS FIBERS FROM PRODUCTION OR
AFTERMARKET

BRAKE

LININGS.

BREATHING

EXCESSIVE

CONCENTRATIONS

ASBESTOS

FIBERS CAN CAUSE SERIOUS BODILY HARM.
EXERCISE

CARE

WHEN

SERVICING

BRAKE

PARTS. DO NOT SAND OR GRIND BRAKE LINING
UNLESS EQUIPMENT USED IS DESIGNED TO CON-
TAIN THE DUST RESIDUE. DO NOT CLEAN BRAKE
PARTS

WITH

COMPRESSED AIR

BY DRY

BRUSHING. CLEANING SHOULD BE DONE BY
DAMPENING THE BRAKE COMPONENTS WITH A
FINE MIST OF WATER, THEN WIPING THE BRAKE
COMPONENTS CLEAN WITH A DAMPENED CLOTH.
DISPOSE OF CLOTH AND ALL RESIDUE CONTAIN-
ING ASBESTOS FIBERS IN AN IMPERMEABLE
CONTAINER WITH THE APPROPRIATE LABEL. FOL-
LOW PRACTICES PRESCRIBED BY THE OCCUPA-
TIONAL SAFETY AND HEALTH ADMINISTRATION
(OSHA) AND THE ENVIRONMENTAL PROTECTION
AGENCY (EPA) FOR THE HANDLING, PROCESSING,
AND DISPOSING OF DUST OR DEBRIS THAT MAY
CONTAIN ASBESTOS FIBERS.

CAUTION

CAUTION: During service procedures, grease or
any other foreign material must be kept off brake
shoes and braking surfaces of brake rotor or drum,
and external surfaces of hub and bearing assembly.

CAUTION: Brake rotor and caliper handling must be
done in such a way as to avoid damage to the rotor,
especially the machined surfaces, and scratching or
nicking of the brake linings.

CAUTION: Only the recommended jacking or hoist-
ing procedures for this vehicle are to be used
whenever it is necessary to lift a vehicle. Failure to
raise a vehicle utilizing the recommended lift points
can result in damage to the vehicle. (Refer to
LUBRICATION & MAINTENANCE/HOISTING - STAN-
DARD PROCEDURE)

DIAGNOSIS AND TESTING - BASE BRAKE
SYSTEM

NOTE: There are three diagnosis charts following
that cover the RED BRAKE WARNING INDICATOR
LAMP, BRAKE NOISE and OTHER BRAKE CONDI-
TIONS.

RED BRAKE WARNING INDICATOR LAMP

CONDITION

POSSIBLE CAUSES

CORRECTION

RED BRAKE WARNING
LAMP ON

1. Parking brake lever not fully
released.

1. Release parking brake lever.

2. Parking brake warning lamp
switch on parking brake lever.

2. Inspect and replace switch as necessary.

3. Brake fluid level low in reservoir.

3. Fill reservoir. Check entire system for
leaks. Repair or replace as required.

4. Brake fluid level switch.

4. Disconnect switch wiring connector. If
lamp goes out, replace switch.

5. Mechanical instrument cluster
(MIC) problem.

5. Refer to appropriate Diagnostic
information.

6. Amber ABS Warning Indicator
Lamp also illuminated.

6. Refer to appropriate Diagnostic
information.

5 - 4

BRAKES - BASE

BRAKES - BASE (Continued)

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