Mazda 6. Manual — part 249

P–52

ON-BOARD DIAGNOSTIC (ABS/TCS)

End Of Sie

DTC B1342

A6E697567650W04

Caution

• When attaching the tester lead to the ABS (ABS/TCS) HU/CM harness connector, the SST (49 G066

001) must be used. (See

P–29 ABS (ABS/TCS) HU/CM INSPECTION

.)

Diagnostic procedure

End Of Sie

DTC C1095, C1096

A6E697567650W06

Caution

• When attaching the tester lead to the ABS (ABS/TCS) HU/CM harnesses connector the SST (49

G066 001) must be used. (See

P–29 ABS (ABS/TCS) HU/CM INSPECTION

.)

DTC

B1342

ABS (ABS/TCS) HU/CM

DETECTION

CONDITION

The on-board diagnostic function detects control module malfunction.

POSSIBLE

CAUSE

• Malfunction of ABS (ABS/TCS) HU/CM

STEP

INSPECTION

ACTION

1

VERIFY CURRENT STATUS OF
MALFUNCTION

• Clear DTC from memory.

(See

P–46 Clearing DTCs Procedures

)

• Start engine and drive vehicle at 10 km/h

{6.2 mph} or above.

• Is same DTC present?

Yes

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

No

Inspect intermittent concern using the same procedure as
engine control system.

2

VERIFY AFTER REPAIR PROCEDURE

• Is there any other DTC present?

Yes

Go to applicable DTC inspection.

No

Troubleshooting completed.

DTC

C1095, C1096

Motor relay, pump motor

DETECTION

CONDITION

• C1095:

— ABS motor stuck OFF when vehicle is started or during ABS operation, ABS motor ON is

commanded.

• C1096:

— ABS motor stuck OFF when vehicle is started or during ABS operation, ABS motor ON is

commanded.

— Motor monitor ON signal is not input after specified time when the motor signal is switched from ON

to OFF by ABS (ABS/TCS) HU/CM.

POSSIBLE

CAUSE

• Open, or short to power or short to ground of motor relay and/or ABS motor in ABS (ABS/TCS) HU/CM

• Stuck motor relay and/or ABS motor

• Open circuit of ABS motor power supply

• Open circuit of ABS motor ground

ON-BOARD DIAGNOSTIC (ABS/TCS)

P–53

P

Diagnostic procedure

STEP

INSPECTION

ACTION

1

VERIFY OTHER DTC HAS BEEN RECORDED

• If any of DTC C1186 and/or C1266 has also

been stored?

Yes

Go to applicable DTC inspection.

No

Go to next step.

2

INSPECT ABS FUSE CONDITION

• Is ABS fuse (60 A) okay?

Yes

Go to next step.

No

Replace fuse, then go to Step 6.

3

INSPECT MOTOR RELAY POWER SUPPLY
CIRCUIT FOR OPEN CIRCUIT

• Turn ignition key to OFF.

• Disconnect ABS (ABS/TCS) HU/CM

connector.

• Connect SST (adapter harness) to ABS

(ABS/TCS) HU/CM connector (harness side
only).

• Turn ignition key to ON (engine OFF).

• Measure voltage between ABS (ABS/TCS)

HU/CM terminal AB (harness side) of SST
and ground.

• Is voltage B+?

Yes

Go to next step.

No

Repair or replace harness for open circuit between battery
positive terminal and ABS (ABS/TCS) HU/CM terminal AC,
then go to Step 6.

4

INSPECT PUMP MOTOR GROUND CIRCUIT
FOR OPEN CIRCUIT

• Turn ignition key to OFF.

• Inspect continuity between ABS (ABS/TCS)

HU/CM terminal AD (harness side) of SST
and ground.

• Is there continuity?

Yes

Go to next step.

No

Repair or replace harness for open circuit between ABS
(ABS/TCS) HU/CM terminal AB and ground, then go to Step
6.

P–54

ON-BOARD DIAGNOSTIC (ABS/TCS)

End Of Sie

DTC C1119

A6E697567650W07

5

VERIFY PUMP MOTOR OPERATION

• Turn ignition key to OFF.

• Remove SST (adapter harness) and connect

all disconnected connectors.

• Connect WDS or equivalent to DLC-2.

• Turn ignition key to ON (engine OFF).

• Access ABS_POWER and PMP_MOTOR

active command modes using WDS or
equivalent.

• Does pump motor operate?

Yes

Go to next step.

No

Repair ABS (ABS/TCS) HU/CM, then go to next step.

6

VERIFY TROUBLESHOOTING COMPLETED

• Clear DTC from memory.

(See

P–46 Clearing DTCs Procedures

)

• Start engine and drive vehicle at 10 km/h

{6.2 mph} or above.

• Gradually slow down and stop vehicle.

• Is same DTC present?

Yes

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

No

Go to next step.

7

VERIFY AFTER REPAIR PROCEDURE

• Is there any other DTC present?

Yes

Go to applicable DTC inspection.

STEP

INSPECTION

ACTION

DTC

C1119

Engine control system, torque reduction inhibit signal line

DETECTION

CONDITION

• Engine RPM information through CAN is out of specification or invalid value

• Throttle information through CAN is out of specification or invalid value

POSSIBLE

CAUSE

• Malfunction of PCM

ON-BOARD DIAGNOSTIC (ABS/TCS)

P–55

P

Diagnostic procedure

End Of Sie

DTC C1140

A6E697567650W09

Caution

• When attaching the tester lead to the ABS (ABS/TCS) HU/CM harness connector, the SST (49 G066

001) must be used. (See

P–29 ABS (ABS/TCS) HU/CM INSPECTION

.)

Diagnostic procedure

STEP

INSPECTION

ACTION

1

CHECK FOR CAN FOR DTCs

• If any of DTC U1900 and/or U2516 has also

been stored?

Yes

Follow inspection procedures for CAN system.
See

T–144 DTC U0073, U1900, U2516

No

Go to next step.

2

CHECK FOR PCM FOR DTCs

• Turn ignition key to OFF.

• Connect WDS or equivalent to DLC-2

• Turn ignition key to ON (engine OFF).

• Is DTC for engine control system obtained?

Yes

Follow inspection procedures for engine control system.

No

Go to next step.

3

VERIFY TROUBLESHOOTING COMPLETED

• Make sure to reconnect all disconnected

connectors.

• Clear DTC from memory.

(See

P–46 Clearing DTCs Procedures

• Start engine.)

• Is same DTC present?

Yes

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

No

Go to next step.

4

VERIFY AFTER REPAIR PROCEDURE

• Is there any other DTC present?

Yes

Go to applicable DTC inspection.

No

Troubleshooting completed.

DTC

C1140

ABS (ABS/TCS) HU/CM (pump)

DETECTION

CONDITION

Right front and left rear wheels, or left front and right rear wheel-lock is detected during ABS (ABS/TCS)
operation.

POSSIBLE

CAUSE

Stuck pump motor in ABS (ABS/TCS) HU/CM

STEP

INSPECTION

ACTION

1

INSPECT ABS (ABS/TCS) HU/CM
OPERATION

• Perform ABS (ABS/TCS) HU/CM system

inspection.
(See

P–27 ABS (ABS/TCS) HU/CM

SYSTEM INSPECTION

)

• Is it okay?

Yes

Go to next step.

No

Replace ABS (ABS/TCS) HU/CM, then go to Step 4.

2

INSPECT CONVENTIONAL BRAKE
OPERATION

• Inspect brake fluid level.

• Start engine.

• Perform a road test to verify conventional

vehicle braking performance.

• Is there any concern.

Yes

Inspect conventional brake line, then go to Step 4.

No

Go to next step.

3

INSPECT REAR BRAKE DRAGGING

• Turn ignition key to OFF.

• Jack-up vehicle and support it with safety

stand.

• Release parking brake.

• Turn rear wheel by hand and inspect for rear

brake drag.

• Is rear brake dragging?

Yes

Repair parking brake system, then go to next step.

No

Go to next step.

4

VERIFY TROUBLESHOOTING COMPLETED

• Clear DTC from memory.

(See

P–46 Clearing DTCs Procedures

)

• Start engine and drive vehicle at 10 km/h

{6.2 mph} or above at least one minute.

• Gradually slow down vehicle and stop.

• Is same DTC present?

Yes

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

No

Go to next step.

5

VERIFY AFTER REPAIR PROCEDURE

• Is there any other DTC present?

Yes

Go to applicable DTC inspection.

No

Troubleshooting completed.