Mazda CX 7. Manual - part 311

ON-BOARD DIAGNOSTIC 

08-02–39

08-02

Diagnostic procedure

STEP

INSPECTION

ACTION

1

INSPECT CRASH ZONE SENSOR

Warning
• Handling the air bag system 

components improperly can 
accidentally deploy the air bag 
modules and pre-tensioner seat belts, 
which may seriously injure you. Read 
the service warnings and cautions 
before handling the air bag system 
components.
(See 08-10-3 AIR BAG SYSTEM 
SERVICE WARNINGS.)
(See 08-10-5 AIR BAG SYSTEM 
SERVICE CAUTIONS.)

• Turn the ignition switch to the LOCK position.

• Disconnect the negative battery cable and 

wait for 1 min or more.

• Disconnect the crash zone sensor connector.

• Is there any malfunction of the crash zone 

sensor connector?

Yes

Replace the air bag wiring harness.

No

Go to the next step.

2

INSPECT WIRING HARNESS BETWEEN 
CRASH ZONE SENSOR AND SAS CONTROL 
MODULE

• Turn the ignition switch to the LOCK position.

• Disconnect the negative battery cable and 

wait for 1 min or more.

• Remove the column cover. (See 09-17-8 

COLUMN COVER REMOVAL/
INSTALLATION.)

• Disconnect the clock spring connector.

• Remove the glove compartment.(See 09-17-

8 GLOVE COMPARTMENT REMOVAL/
INSTALLATION.)

• Disconnect the passenger-side air bag 

module connector.

• Disconnect the driver and passenger-side 

seat connectors.

• Remove the C-pillar trim. (See 09-17-17 C-

PILLAR TRIM REMOVAL/INSTALLATION.)

• Remove the D-pillar trim. (See 09-17-18 D-

PILLAR TRIM REMOVAL/INSTALLATION.)

• Disconnect the driver and passenger-side 

curtain air bag module connector.

• Remove the B-pillar lower trim. (See 09-17-

16 B-PILLAR LOWER TRIM REMOVAL/
INSTALLATION.)

• Disconnect the driver and passenger-side 

pre-tensioner seat belt connectors.

• Remove the console. (See 09-17-13 

CONSOLE REMOVAL/INSTALLATION.)

• Disconnect the SAS control module 

connector.

• Disconnect the crash zone sensor connector.

• Connect the negative battery cable.

• Inspect the wiring harnesses between SAS 

control module terminal 1C and crash zone 
sensor terminal A, SAS control module 
terminal 1B and crash zone sensor terminal 
B for the following:
— Short to ground

— Short to power supply

— Open circuit

• Is the wiring harness normal?

Yes

Replace the crash zone sensor, then go to the next step.
(See 08-10-10 CRASH ZONE SENSOR REMOVAL/
INSTALLATION.)

No

Replace the air bag wiring harness.

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ON-BOARD DIAGNOSTIC 

08-02–40

End Of Sie

DTC B2444, U2017

id080200802700

3

INSPECT SAS CONTROL MODULE

• Turn the ignition switch to the LOCK position.

• Disconnect the negative battery cable and 

wait for 1 min or more.

• Connect the SAS control module connector.

• Connect the crash zone sensor connector.

• Turn the ignition switch to the ON position.

• Is DTC B2296 indicated?

Yes

Replace the SAS control module.
(See 08-10-10 SAS CONTROL MODULE REMOVAL/
INSTALLATION.)

No

DTC troubleshooting completed.

STEP

INSPECTION

ACTION

DTC

B2444

Driver-side side air bag sensor No.1 (internal circuit abnormal)

U2017

Driver-side side air bag sensor No.1 (communication error)

DETECTION 

CONDITION

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

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

• Malfunction in the wiring harness between the driver-side side air bag sensor No.1 and SAS control 

module

• Malfunction in the driver-side side air bag sensor circuit

POSSIBLE 

CAUSE

• Open or short circuit in the wiring harness between the driver-side side air bag sensor No.1 and SAS 

control module

• Driver-side side air bag sensor malfunction

• SAS control module malfunction

A

B

SAS CONTROL MODULE WIRING 

HARNESS-SIDE CONNECTOR

DRIVER-SIDE SIDE AIR BAG SENSOR NO.1 

WIRING HARNESS-SIDE CONNECTOR

2A

2B

2C

2D

2E

2F

2G

2H

2I

2J

2L

2M

2O

2P

2R

2S

2T

2U

2V

2W

2Y

2X

2Z

2AA

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ON-BOARD DIAGNOSTIC 

08-02–41

08-02

Diagnostic procedure

STEP

INSPECTION

ACTION

1

INSPECT DRIVER-SIDE SIDE AIR BAG 
SENSOR NO. 1 CONNECTOR

Warning
• Handling the air bag system 

components improperly can 
accidentally deploy the air bag 
modules and pre-tensioner seat belts, 
which may seriously injure you. Read 
the service warnings and cautions 
before handling the air bag system 
components.
 (See 08-10-3 AIR BAG SYSTEM 
SERVICE WARNINGS.)
 (See 08-10-5 AIR BAG SYSTEM 
SERVICE CAUTIONS.)

• Turn the ignition switch to the LOCK position.

• Disconnect the negative battery cable and 

wait for 1 min or more.

• Remove the B-pillar lower trim (driver-side).

(See 09-17-16 B-PILLAR LOWER TRIM 
REMOVAL/INSTALLATION.)

• Disconnect the driver-side side air bag 

sensor No. 1 connector.

• Is there any malfunction of the driver-side 

side air bag sensor No. 1 connector?

Yes

Replace the air bag wiring harness.

No

Go to the next step.

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ON-BOARD DIAGNOSTIC 

08-02–42

End Of Sie

2

INSPECT WIRING HARNESS BETWEEN 
DRIVER-SIDE SIDE AIR BAG SENSOR NO.1 
AND SAS CONTROL MODULE

• Turn the ignition switch to the LOCK position.

• Disconnect the negative battery cable and 

wait for 1 min or more.

• Remove the column cover. (See 09-17-8 

COLUMN COVER REMOVAL/
INSTALLATION.)

• Disconnect the clock spring connector.

• Remove the glove compartment.(See 09-17-

8 GLOVE COMPARTMENT REMOVAL/
INSTALLATION.)

• Disconnect the passenger-side air bag 

module connector.

• Disconnect the driver and passenger-side 

seat connectors.

• Disconnect the driver and passenger-side 

curtain air bag module connector.

• Remove the B-pillar lower trim. (See 09-17-

16 B-PILLAR LOWER TRIM REMOVAL/
INSTALLATION.)

• Disconnect the driver and passenger-side 

pre-tensioner seat belt connectors.

• Disconnect the driver-side side air bag 

sensor No.1 connector.

• Remove the console. (See 09-17-13 

CONSOLE REMOVAL/INSTALLATION.)

• Disconnect the SAS control module 

connector.

• Connect the negative battery cable.

• Inspect the wiring harnesses between SAS 

control module connector terminal 2AA and 
driver-side side air bag sensor No.1 
connector terminal A, SAS control module  
connector terminal 2Z and driver-side side 
air bag sensor No.1 connector terminal B for 
the following:
— Short to ground

— Short to power supply

— Open circuit

• Is the wiring harness normal?

Yes

Go to the next step.

No

Replace the air bag wiring harness.

3

INSPECT SAS CONTROL MODULE

• Turn the ignition switch to the LOCK position.

• Disconnect the negative battery cable and 

wait for 1 min or more.

• Connect the SAS control module connector.

• Connect the driver-side side air bag sensor 

No.1 connector.

• Turn the ignition switch to the ON position.

• Are DTCs B2444 and/or U2017 indicated?

Yes

Replace the SAS control module.
(See 08-10-10 SAS CONTROL MODULE REMOVAL/
INSTALLATION.)

No

DTC troubleshooting completed.

STEP

INSPECTION

ACTION

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