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.