Mazda Protege 5. Manual — part 207

SYMPTOM TROUBLESHOOTING

04–03–11

04–03

End Of Sie

5

CONFIRM THAT MALFUNCTION SYMPTOM
DO NOT REOCCUR AFTER ABS HU/CM
CONNECTOR TERMINAL W IS CONNECTED

•

Do ABS warning light go out after more than
4 seconds with ignition switch on?

Yes

Temporary poor connection at terminal.
Inspect ABS HU/CM connector and terminal.

No

Go to next step.

6

CHECK FOR OPEN CIRCUITS IN ABS HU/CM

•

Disconnect ABS HU/CM. Connect the SST
(49 G066 001) (vehicle harness side only).

•

Use the SST connector to ground ABS
warning light terminal W to body ground.
Does ABS warning light go out with ignition
switch on?

Yes

Replace ABS HU/CM (open circuit in ABS HU/CM).

No

Go to next step.

*7

CHECK TO SEE WHETHER MALFUNCTION
IS IN WIRING HARNESS (LACK OF
CONTINUITY BETWEEN INSTRUMENT
CLUSTER AND ABS HU/CM) OR
INSTRUMENT CLUSTER (OPEN CIRCUIT OR
SHORT TO GROUND)

•

Disconnect instrument cluster.

•

Is there continuity between following SST
connector terminal W and instrument cluster
connector (16-pin) terminal 2B?

Yes

Replace instrument cluster (open circuit or ground to short
in instrument cluster).

No

Repair wiring harness between ABS HU/CM (terminal W)
and instrument cluster.

8

INSPECT ABS HU/CM IGINITION POWER
SUPPLY SYSTEM (TERMINAL Z)

•

Check the voltage for PID/DATA monitor
ABS_VOLT item.
Specification: above 10V

•

Is voltage within specification?

Yes

Replace ABS HU/CM (open circuit or short in ground circuit
in ABS HU/CM).

No

Go to next step.

9

INSPECT BATTERY

•

Is battery voltage normal?

Yes

Go to next step

No

Inspect battery and charging system

10

INSPECT CHARGING SYSTEM

•

Is battery voltage normal with electrical load
(A/C, headlights, etc) on and engine idling?

Yes

Go to next step

No

Inspect charging system (drive belt tension, generator, etc).

*11

INSPECT WIRING HARNESS BETWEEN ABS
HU/CM POWER SUPPLY AND ABS HU/CM
FOR CONTINUITY

•

Disconnect ABS HU/CM. Connect SST (49
G066 001) (vehicle harness side only).

•

Is voltage approximately 12V at SST
connector terminal Z?

Yes

Go to next step.

No

Repair wiring harness between fuse block and ABS HU/CM

*12

INSPECT WIRING HARNESS BETWEEN ABS
HU/CM AND GROUND FOR CONTINUITY

•

Turn ignition switch to LOCK

•

Is there continuity between SST connector
terminal AA and ground?

Yes

If a communication error message is displayed on WDS or
equivalent in Step 1 inspection, go to next step.
If a communication error message is not displayed on WDS
or equivalent in Step 1 inspection, trouble shooting is
completed.

No

Repair wiring harness between ABS HU/CM and ground.

*13

INSPECT WIRING HARNESS BETWEEN ABS
HU/CM AND DLC-2 FOR CONTINUITY

•

Disconnect ABS HU/CM. Connect the SST
(49 G066 001) (vehicle harness side only).

•

Is there continuity between SST connector
terminal T and DLC-2?

Yes

Go to next step.

No

Repair wiring harness between ABS HU/CM and DLC-2.

*14

INSPECT WIRING HARNESS BETWEEN ABS
HU/CM AND DLC-2 FOR SHORT TO B+

•

Is voltage approximately 12 V at SST
connector terminal T?

Yes

Repair wiring harness between ABS HU/CM and DLC-2.

No

Go to next step.

*15

INSPECT WIRING HARNESS BETWEEN ABS
HU/CM AND DLC-2 FOR SHORT TO GROUND

•

Is there continuity between SST connector
terminal T and ground?

Yes

Repair wiring harness between ABS HU/CM and DLC-2.

No

Replace ABS HU/CM (communication circuit malfunction in
ABS HU/CM).

STEP

INSPECTION

ACTION

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SYMPTOM TROUBLESHOOTING

04–03–12

NO.6 BRAKE SYSTEM WARNING LIGHT STAYS ON

A3U040343000W10

•

When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while
performing the inspection to discover whether poor contact points are the cause of any intermittent
malfunctions. If there is a problem, check to make sure connectors, terminals and wiring harness are
connected correctly and undamaged.

Diagnostic procedure

6

BRAKE system warning light stays ON

DESCRIPTION

•

Brake system warning light stays on more than 4 seconds with ignition switch on. (Parking brake is
released.)

POSSIBLE

CAUSE

•

Warning light circuit open or shorted to ground in ABS HU/CM

•

Short to ground in circuit in parking brake switch and/or brake fluid level sensor

STEP

INSPECTION

ACTION

1

INSPECT BRAKE FLUID LEVEL

•

Is brake fluid level okay?

Yes

Go to next step.

No

Add brake fluid.

2

INSPECT WIRING HARNESS BETWEEN ABS
HU/CM AND DLC-2 FOR CONTINUITY AND
SHORTS

•

Inspect the following items using WDS or
equivalent.
— BRAKE_LMP (BRAKE system warning

light)

•

Is error message displayed regarding
communication between ABS HU/CM and
WDS or equivalent?

Yes

If a communication error message is displayed even after
inspecting according to procedures displayed on the WDS
or equivalent, go to Step 8.

No

Go to next step.

3

INSPECT PID/DATA IN ABS HU/CM

•

Inspect BRAKE_LMP (BRAKE system
warning light) using WDS or equivalent.

•

Is BRAKE_LMP is ON after more than 4
seconds with ignition switch on?

Yes

Replace ABS HU/CM (open circuit or short to ground in ABS
HU/CM).

No

Go to next step.

4

VERIFY THAT ABS HU/CM CONNECTOR
TERMINAL X IS CONNECTED

•

Does malfunction symptom happen again
when ABS HU/CM connector terminal X is
shaken while the ignition switch is ON?.

Yes

Connect ABS HU/CM connector terminal X securely, then
go to next step.

No

Go to Step 6.

5

CONFIRM THAT MALFUNCTION SYMPTOMS
DO NOT RECCUR AFTER ABS HU/CM
CONNECTOR TERMINAL X IS CONNECTED

•

Does BRAKE system warning light go out
after more than 4 seconds with ignition
switch on?

Yes

Temporary poor connection at terminal.
Inspect ABS HU/CM connector and terminal.

No

Go to next step.

*6

CHECK FOR OPEN CIRCUITS IN ABS HU/CM

•

Disconnect ABS HU/CM. Connect the SST
(49 G066 001) (vehicle harness side only).

•

Use the SST connector to ground BRAKE
system warning light terminal X to body
ground.

•

Does BRAKE system warning light go out
with ignition switch on?

Yes

Replace ABS HU/CM (open circuit in ABS HU/CM).

No

Go to next step.

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SYMPTOM TROUBLESHOOTING

04–03–13

04–03

End Of Sie

NO.7 BRAKE SYSTEM MALFUNCTION

A3U040343000W11

Diagnostic procedure

End Of Sie

7

CHECK TO SEE WHETHER MALFUNCTION
IS IN PARKING BRAKE SWITCH OR BRAKE
FLUID LEVEL SENSOR, OR IN SOME OTHER
PART

•

Disconnect the following in order:
1. Parking brake switch connector
2. Brake fluid level sensor connector

•

Does BRAKE system warning light go out
with ignition switch on?

Yes

Replace parking brake switch and/or brake fluid level sensor
(shorted on some internal part).

No

Perform the following inspections. Repair if necessary.

•

Open circuit in wiring harness between ABS HU/CM
(terminal X) and instrument cluster (BRAKE system
warning light)

•

Short to ground in wiring harness between instrument
cluster (BRAKE system warning light) and parking brake
switch.

•

Short to ground in wiring harness between instrument
cluster (BRAKE system warning light) and brake fluid
level sensor.

If above inspections are okay, replace instrument cluster
(open or ground to short in instrument cluster).

*8

INSPECT WIRING HARNESS BETWEEN ABS
HU/CM AND DLC-2 FOR CONTINUITY

•

Disconnect ABS HU/CM. Connect the SST
(49 G066 001) (vehicle harness side only).

•

Is there continuity between SST connector
terminal T and DLC-2?

Yes

Go to next step.

No

Repair wiring harness between ABS HU/CM and DLC-2.

*9

INSPECT WIRING HARNESS BETWEEN ABS
HU/CM AND DLC-2 FOR SHORT TO B+

•

Is voltage approximately 12 V at SST
connector terminal T?

Yes

Repair wiring harness between ABS HU/CM and DLC-2.

No

Go to next step.

*10

INSPECT WIRING HARNESS BETWEEN ABS
HU/CM AND DLC-2 FOR SHORT TO GROUND

•

Is there continuity between SST connector
terminal T and ground?

Yes

Repair wiring harness between ABS HU/CM and DLC-2.

No

Replace ABS HU/CM (communication circuit malfunction in
ABS HU/CM).

STEP

INSPECTION

ACTION

7

BRAKE system malfunction

DESCRIPTION

•

There is a malfunction in system even though ABS warning light and BRAKE system warning light does
not illuminate.

POSSIBLE

CAUSE

•

There is a mechanical malfunction in system

STEP

INSPECTION

ACTION

1

CHECK FOR DTCS IN ABS HU/CM

•

Have DTCs been recorded in memory?

Yes

Perform inspection using appropriate DTC.

No

Go to next step.

2

INSPECT ABS HYDRAULIC UNIT

•

Perform “ABS hydraulic unit system
inspection”.

•

Is system okay?

Yes

Inspect conventional brake system.

No

If wheels do not rotate:

•

Replace ABS HU/CM.

If wheels rotate but order in which wheels rotate is
incorrect:

•

Inspect brake pipe passage to ABS HU/CM.

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GENERAL PROCEDURES

04–10–1

04–10

04–10

GENERAL PROCEDURES

PRECAUTION (BRAKES). . . . . . . . . . . . 04–10–1

Wheels and Tires Removal/Installation 04–10–1
Brake Lines Disconnection/Connection 04–10–1

Connectors Disconnection . . . . . . . . . . 04–10–1
ABS Components Operations . . . . . . . . 04–10–1

End of Toc

PRECAUTION (BRAKES)

A3U041001020W01

Wheels and Tires Removal/Installation

1. The removal and installation procedures for the wheels and tires are not mentioned in this section. When a

wheel is removed, tighten it to 89—117 N·m {9.0—12.0 kgf·m, 65.1—86.7 ft·lbf}.

Brake Lines Disconnection/Connection

Caution

••••

Brake fluid will damage painted surfaces. If brake fluid does get on a painted surface, wipe it off
immediately.

1. Tighten the brake pipe flare nut using the SST (49 0259 770B). Be sure to modify the brake pipe flare nut

tightening torque to allow for use of a torque wrench-SST combination. (See 00–00–15 Torque Formulas.)

•

If any brake line has been disconnected anytime during the procedure, add brake fluid, bleed the brakes,
and inspect for leakage after the procedure has been completed.

Connectors Disconnection

1. Disconnect the negative battery cable before doing any work that requires handling of connectors. Reconnect

the negative battery cable only after the work is completed.

ABS Components Operations

1. Make sure that there are no DTCs in the ABS memory after working on ABS components.

•

If there are any DTCs in the memory, clear them.

End Of Sie

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