Mazda Protege 5. Manual — part 204

ON-BOARD DIAGNOSTIC

04–02–18

End Of Sie

DTC B1342 (61)

A3U040243000W10

Diagnostic procedure

End Of Sie

DTC B1318 (63)

A3U040243000W11

Caution

••••

When attaching the tester lead to the ABS HU/CM or the ABS HU/CM harnesses connector the SST
(49 G066 001) must be used. (See 04–13–6 ABS HYDRAULIC UNIT (HU)/CONTROL MODULE (CM)
INSPECTION.)

Diagnostic procedure

DTC

B1342 (61)

ABS HU/CM (CM)

DETECTION

CONDITION

The on-board diagnostic function detects computer malfunction.

POSSIBLE

CAUSE

•

Malfunction of ABS HU/CM

STEP

INSPECTION

ACTION

1

VERIFY CURRENT STATUS OF
MALFUNCTION

•

Clear DTC from memory.
(See 04–02–4 DTCs Clearing Procedure)

•

Start engine and drive vehicle at 10 km/h
{6.2 mph} or above.

•

Is same DTC present?

Yes

Replace ABS HU/CM, then go to next step.

No

Go to next step.

2

VERIFY AFTER REPAIR PROCEDURE

•

Is there any other DTC present?

Yes

Go to applicable DTC inspection.

No

Troubleshooting completed.

DTC

B1318 (63)

ABS HU/CM power supply

DETECTION

CONDITION

•

Voltage at Z terminal of ABS HU/CM drops below 10 V when driving vehicle.

POSSIBLE

CAUSE

•

Low power supply

•

Battery and/or generator malfunction

•

Poor ground or open circuit of ground

STEP

INSPECTION

ACTION

1

INSPECT ABS HU/CM POWER SUPPLY
CIRCUIT FOR OPEN CIRCUIT

•

Turn ignition key to OFF.

•

Disconnect ABS HU/CM connector.

•

Connect SST (adapter harness) to ABS HU/
CM connector (harness side) with ABS HU/
CM disconnected.

•

Start engine.

•

Measure voltage between terminal Z of SST
(harness side) and ground.

•

Is voltage above 10 V?

Yes

Go to next step.

No

Go to Step 3.

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ON-BOARD DIAGNOSTIC

04–02–19

04–02

End Of Sie

2

INSPECT ABS HU/CM GROUND CIRCUIT
FOR POOR GROUND AND OPEN CIRCUIT

•

Turn ignition key to OFF.

•

Measure resistance between terminal AA of
SST and ground.

•

Is resistance within 0—1 ohm?

Yes

Go to Step 5.

No

If there is no continuity:

•

Repair or replace harness for open between ABS HU/
CM and ground, then go to Step 5.

If resistance is not within 0—1 ohm:

•

Repair or replace harness for poor ground then go to
Step 5.

3

INSPECT BATTERY POWER

•

Inspect battery.
(See 01–50–1 ENGINE TECHNICAL DATA)

•

Is it okay?

Yes

Go to next step.

No

Replace battery, then go to Step 5.

4

INSPECT GENERATOR

•

Inspect generator.
(See 01–17–3 GENERATOR INSPECTION)

•

Is it okay?

Yes

Go to next step.

No

Repair or replace generator, then go to Step 5.

5

VERIFY TROUBLESHOOTING COMPLETED

•

Make sure to reconnected all disconnected
connectors.

•

Clear DTC from memory.
(See 04–02–4 DTCs Clearing Procedure)

•

Is same DTC present?

Yes

Replace ABS HU/CM, then go to next step.

No

Go to next step.

6

VERIFY AFTER REPAIR PROCEDURE

•

Is there any other DTC present?

Yes

Go to applicable DTC inspection.

No

Troubleshooting completed.

STEP

INSPECTION

ACTION

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SYMPTOM TROUBLESHOOTING

04–03–1

04–03

04–03

SYMPTOM TROUBLESHOOTING

ABS SYSTEM DIAGRAM . . . . . . . . . . . . 04–03–2
FOREWORD . . . . . . . . . . . . . . . . . . . . . . 04–03–3
ABS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 04–03–3

Foreword . . . . . . . . . . . . . . . . . . . . . . . 04–03–3
Precaution . . . . . . . . . . . . . . . . . . . . . . 04–03–3

SYMPTOM TROUBLESHOOTING . . . . . 04–03–4

ABS Symptom Troubleshooting . . . . . . 04–03–4
Quick Diagnosis Chart . . . . . . . . . . . . . 04–03–5

NO.1 NEITHER ABS WARNING

LIGHT NOR BRAKE SYSTEM
WARNING LIGHT ILLUMINATE . . . . . . 04–03–5

NO.2 ABS WARNING LIGHT DOES

NOT ILLUMINATE. . . . . . . . . . . . . . . . . 04–03–6

NO.3 BRAKE SYSTEM WARNING

LIGHT DOES NOT ILLUMINATE . . . . . . 04–03–7

NO.4 ABS WARNING LIGHT AND

BRAKE SYSTEM WARNING LIGHT
STAY ON . . . . . . . . . . . . . . . . . . . . . . . . 04–03–8

NO.5 ABS WARNING LIGHT

STAYS ON . . . . . . . . . . . . . . . . . . . . . . . 04–03–10

NO.6 BRAKE SYSTEM WARNING

LIGHT STAYS ON . . . . . . . . . . . . . . . . . 04–03–12

NO.7 BRAKE SYSTEM

MALFUNCTION . . . . . . . . . . . . . . . . . . . 04–03–13

End of Toc

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SYMPTOM TROUBLESHOOTING

04–03–2

ABS SYSTEM DIAGRAM

A3U040343000W01

End Of Sie

A3U0402W001

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