Mazda Protege 5. Manual — part 216

ANTILOCK BRAKE SYSTEM

04–13–4

Without using the SSTs

1. Perform the “Preparation.”

Caution

••••

Connecting the wrong data link connector (DLC) terminal may possibly cause a malfunction.
Carefully connect the specified terminal only.

2. Use a jumper wire to short terminal TBS of the

DLC to body GND.

3. Depress the brake pedal, and have an assistant

verify that the right front wheel does not turn.

4. With the brake pedal still depressed, turn the

ignition switch on and verify that the brake is
released momentarily (approx. 0.5 sec.) and that
the wheel turns when pressure-reduction
operates.

5. Inspect the operation of the remaining wheels in

order: right front, left front, right rear, left rear.

•

Replace the ABS HU/CM if wheels do not
rotate.

•

Inspect brake piping to ABS HU/CM if
operation of the remaining wheel order is not within specified.

Note

•

If Steps 4 and 5 show correct operation, the
following systems are okay:
— Brake piping to ABS HU/CM
— Braking system, including ABS HU/CM
— Electrical system in ABS HU/CM

(solenoid, ABS motor, etc.)

•

The following are not inspected with above
steps:
— Input system and harness of ABS HU/

CM

— Intermittent failure
— Fluid leakage from brake including the

ABS HU/CM and master cylinder

6. Turn the ignition switch off and remove the jumper wire.

End Of Sie

Y3U413WA3

YMU413WA7

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ANTILOCK BRAKE SYSTEM

04–13–5

04–13

ABS HYDRAULIC UNIT (HU)/CONTROL MODULE (CM) REMOVAL/INSTALLATION

A3U041343700W01

Caution

••••

Do not drop the ABS hydraulic unit (HU) /control module (CM). Replace it if it is subjected to an
impact.

1. Remove the battery and battery tray.
2. Remove in the order indicated in the table.
3. Install in the reverse order of removal.

.

A3U0413W101

1

Brake pipe

2

Connector
(See 04–13–6 Connector Removal Note)
(See 04–13–6 Connector Installation Note

3

ABS HU/CM
(See 04–13–6 ABS HU/CM Removal/Installation
Note)

4

stud

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ANTILOCK BRAKE SYSTEM

04–13–6

Connector Removal Note

1. Pull the lock lever up and make it unlock.
2. Remove the connector.

ABS HU/CM Removal/Installation Note

1. When removing/installing the ABS HU/CM from/to the vehicle, attach a strip of protective tape on the ABS HU/

CM connector to prevent brake fluid from entering.

Connector Installation Note

1. Verify that the lock lever of the harness connector

is completely pulled up.

End Of Sie

ABS HYDRAULIC UNIT (HU)/CONTROL MODULE (CM) INSPECTION

A3U041367650W01

1. Disconnect the negative battery cable.
2. Connect the SST between the ABS HU/CM and

harness connector with the ignition switch off.

3. Attach the tester leads to the SST and inspect

voltage referring the table below.

Terminal Voltage Table (Reference)
(Engine is idling, and connector is connected unless otherwise indicated)

YMU413WC8

YMU413WC9

YMU413WA3

Y3U402WA8

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ANTILOCK BRAKE SYSTEM

04–13–7

04–13

*

1

: ATX only

*

2

: Use this terminal at factory only, not used for inspection and repair at field

Terminal

Signal

Connected to

Test condition

Voltage (V)

Action

A
B

RR wheel-speed

RR wheel-speed
sensor

Vehicle is stopped

0 (AC)

•

Inspect related harness

•

Inspect ABS wheel-speed
sensor

•

Inspect by using the wave profile.
(See 04–13–8 Inspection Using An
Oscilloscope (Reference))

C

F

LR wheel-speed

LR wheel-speed
sensor

Vehicle is stopped

0 (AC)

•

Inspect by using the wave profile.
(See 04–13–8 Inspection Using An
Oscilloscope (Reference))

D
G

RF wheel-speed

RF wheel-speed
sensor

Vehicle is stopped

0 (AC)

•

Inspect by using the wave profile.
(See 04–13–8 Inspection Using An
Oscilloscope (Reference))

E

I

LF wheel-speed

LF wheel-speed
sensor

Vehicle is stopped

0 (AC)

•

Inspect by using the wave profile.
(See 04–13–8 Inspection Using An
Oscilloscope (Reference))

H

—

—

—

—

—

J

*1

Vehicle speed

output

PCM

Vehicle is stopped

0

•

Inspect related harness

•

Inspect ABS wheel-speed
sensor

•

Inspect by using the wave profile.
(See 04–13–8 Inspection Using An
Oscilloscope (Reference))

L

—

—

—

—

—

M

—

—

—

—

—

O

—

—

—

—

—

P

—

—

—

—

—

Q

Vehicle speed

output

Instrument cluster

Vehicle is stopped

0

•

Inspect related harness

•

Inspect ABS wheel-speed
sensor

•

Inspect by using the wave profile.
(See 04–13–8 Inspection Using An
Oscilloscope (Reference))

R

—

—

—

—

—

S

—

—

—

—

—

T

On-board
diagnosis

KLN terminal of
DLC and DLC-2

—

No need to check

—

U*

2

—

DLC

—

No need to check

—

V

On-board
diagnosis

TBS terminal of
DLC

—

10—14

•

Inspect related harness

W

ABS warning
light

ABS warning light

Illuminated

Below 0.5

•

Inspect related harness

Not illuminated

Above 1.5

X

Brake system
warning light

Brake system
warning light

Illuminated

Below 0.5

•

Inspect related harness

Not illuminated

Above 1.5

Y

Brake switch

Brake switch

Brake pedal is
depressed

10—14

•

Inspect related harness

Brake pedal is
released

Below 0.5

Z

Power supply

Ignition switch

—

B+

•

Inspect related harness

AA

Ground

Ground

—

0

•

Inspect related harness

AB

Power supply
(ABS motor)

Battery

—

B+

•

Inspect related harness

AC

Power supply
(Solenoid valve)

Battery

—

B+

AD

Ground

Ground

—

0

•

Inspect related harness

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