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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