Mazda 6. Manual — part 368

ON-BOARD DIAGNOSTIC [AIR BAG SYSTEM]

T–219

T

Diagnostic procedure

End Of Sie

STEP

INSPECTION

ACTION

1

INSPECT CRASH ZONE SENSOR

• Check following PID/DATA monitor, using

SST (WDS or equivalent).
(See

T–195 PID/DATA MONITOR TABLE

)

— OD_F_CRSH

• Is crash zone sensor normal?

Yes

Present malfunction diagnosis:

• Replace SAS unit.

(See

T–124 SAS UNIT REMOVAL/INSTALLATION

)

Past malfunction diagnosis:

• Troubleshooting completed.

No

Go to next step.

2

INSPECT WIRING HARNESS BETWEEN
CRASH ZONE SENSOR AND SAS UNIT

Warning
• Handling air bag system components

improperly can accidentally deploy air
bag modules and pre-tensioner seat
belts, which may seriously injure you.
Read AIR BAG SYSTEM SERVICE
WARNINGS before handling air bag
system components.
(See

T–117 SERVICE WARNINGS

)

• Turn ignition switch to LOCK position.

• Disconnect negative battery cable and wait

for more than 1 minute.

• Remove column cover.

• Disconnect clock spring connector.

• Remove glove compartment.

• Disconnect passenger-side air bag module

connector.

• Disconnect driver and passenger-side side

air bag module connectors. (Vehicle with
side air bag)

• Disconnect driver and passenger-side

curtain air bag module connectors. (Vehicle
with curtain air bag)

• Remove B-pillar lower trim. (Vehicle with pre-

tensioner seat belt)

• Disconnect driver and passenger-side pre-

tensioner seat belt connectors. (Vehicle with
pre-tensioner seat belt)

• Turn up floor covering.

• Disconnect all SAS unit connectors.

• Disconnect crash zone sensor connector.

• Connect negative battery cable.

• Inspect following wiring harnesses between

SAS unit and crash zone sensor terminals
for short to ground, short to power supply,
and open circuit:
— 1B—A
— 1C—B

• Is wiring harness okay?

Yes

Replace crash zone sensor, then go to next step.
(See

T–123 CRASH ZONE SENSOR REMOVAL/

INSTALLATION

)

No

Replace wiring harnesses.

3

INSPECT SAS UNIT

• Turn ignition switch to LOCK position.

• Disconnect negative battery cable and wait

for more than 1 minute.

• Connect all SAS unit connectors.

• Connect crash zone sensor connector.

• Is DTC B2296 indicated?

Yes

Present malfunction diagnosis:

• Replace SAS unit.

(See

T–124 SAS UNIT REMOVAL/INSTALLATION

)

Past malfunction diagnosis:

• Troubleshooting completed.

No

Troubleshooting completed.

T–220

ON-BOARD DIAGNOSTIC [AIR BAG SYSTEM]

DTC B2444, U2017

A6E817401046W20

Diagnostic procedure

DTC

B2444

Driver-side side air bag sensor system (sensor internal circuit abnormal)

U2017

Driver-side side air bag sensor system (communication error)

DETECTION

CONDITION

Warning
• Detection conditions are for understanding DTC outline before performing inspection.

Performing inspection with only detection conditions may cause injury due to operating error
or damage the system. When performing inspection, always follow inspection procedure.

• Malfunction in wiring harness between driver-side side air bag sensor and SAS unit

• Malfunction in driver-side side air bag sensor circuit

POSSIBLE

CAUSE

• Open or short circuit in wiring harness between driver-side side air bag sensor and SAS unit

• Driver-side side air bag sensor malfunction

• SAS unit malfunction

STEP

INSPECTION

ACTION

1

INSPECT DRIVER-SIDE SIDE AIR BAG
SENSOR

• Check following PID/DATA monitor, using

SST (WDS or equivalent).
(See

T–195 PID/DATA MONITOR TABLE

)

— OD_D_CRSH

• Is driver-side side air bag sensor normal?

Yes

Present malfunction diagnosis:

• Replace SAS unit.

(See

T–124 SAS UNIT REMOVAL/INSTALLATION

)

Past malfunction diagnosis:

• Troubleshooting completed.

No

Go to next step.

ON-BOARD DIAGNOSTIC [AIR BAG SYSTEM]

T–221

T

End Of Sie

2

INSPECT WIRING HARNESS BETWEEN
DRIVER-SIDE SIDE AIR BAG SENSOR AND
SAS UNIT

Warning
• Handling air bag system components

improperly can accidentally deploy air
bag modules and pre-tensioner seat
belts, which may seriously injure you.
Read AIR BAG SYSTEM SERVICE
WARNINGS before handling air bag
system components.
(See

T–117 SERVICE WARNINGS

)

• Turn ignition switch to LOCK position.

• Disconnect negative battery cable and wait

for more than 1 minute.

• Remove column cover.

• Disconnect clock spring connector.

• Remove glove compartment.

• Disconnect passenger-side air bag module

connector.

• Disconnect driver and passenger-side side

air bag module connectors. (Vehicle with
side air bag)

• Disconnect driver and passenger-side

curtain air bag module connectors. (Vehicle
with curtain air bag)

• Remove B-pillar lower trim.

• Disconnect driver and passenger-side pre-

tensioner seat belt connectors. (Vehicle with
pre-tensioner seat belt)

• Turn up floor covering.

• Disconnect all SAS unit connectors.

• Disconnect driver-side side air bag sensor

connector.

• Connect negative battery cable.

• Inspect following wiring harnesses between

SAS unit and driver-side side air bag sensor
terminals for short to ground, short to power
supply, and open circuit:
— 2Z—A
— 2AA—B

• Is wiring harness okay?

Yes

Replace driver-side side air bag sensor, then go to next
step.
(See

T–123 SIDE AIR BAG SENSOR REMOVAL/

INSTALLATION

)

No

Replace wiring harnesses.

3

INSPECT SAS UNIT

• Turn ignition switch to LOCK position.

• Disconnect negative battery cable and wait

for more than 1 minute.

• Connect all SAS unit connectors.

• Connect driver-side side air bag sensor

connector.

• Are DTCs B2444 and/or U2017 indicated?

Yes

Present malfunction diagnosis:

• Replace SAS unit.

(See

T–124 SAS UNIT REMOVAL/INSTALLATION

)

Past malfunction diagnosis:

• Troubleshooting completed.

No

Troubleshooting completed.

STEP

INSPECTION

ACTION

T–222

ON-BOARD DIAGNOSTIC [AIR BAG SYSTEM]

DTC B2445, U2018

A6E817401046W21

Diagnostic procedure

DTC

B2445

Passenger-side side air bag sensor system (sensor internal circuit abnormal)

U2018

Passenger-side side air bag sensor system (communication error)

DETECTION

CONDITION

Warning
• Detection conditions are for understanding DTC outline before performing inspection.

Performing inspection with only detection conditions may cause injury due to operating error
or damage the system. When performing inspection, always follow inspection procedure.

• Malfunction in wiring harness between passenger-side side air bag sensor and SAS unit

• Malfunction in passenger-side side air bag sensor circuit

POSSIBLE

CAUSE

• Open or short circuit in wiring harness between passenger-side side air bag sensor and SAS unit

• Passenger-side side air bag sensor malfunction

• SAS unit malfunction

STEP

INSPECTION

ACTION

1

INSPECT PASSENGER-SIDE SIDE AIR BAG
SENSOR

• Check following PID/DATA monitor, using

SST (WDS or equivalent).
(See

T–195 PID/DATA MONITOR TABLE

)

— OD_P_CRSH

• Is passenger-side side air bag sensor

normal?

Yes

Present malfunction diagnosis:

• Replace SAS unit.

(See

T–124 SAS UNIT REMOVAL/INSTALLATION

)

Past malfunction diagnosis:

• Troubleshooting completed.

No

Go to next step.