Mazda CX 7. Manual - part 309

ON-BOARD DIAGNOSTIC 

08-02–31

08-02

Diagnostic procedure

End Of Sie

STEP

INSPECTION

ACTION

1

INSPECT passenger-side side AIR BAG 
MODULE

• Using the M-MDS, verify the following PID/

DATA monitor.
(See 08-02-8 PID/DATA MONITOR TABLE.)
— RES_SAB_P

• Is the resistance of the passenger-side side 

air bag module normal?
— Resistance: 1.4— 3.9 ohms

Yes

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

No

Go to the next step.

2

INSPECT DRIVER-SIDE SIDE AIR BAG 
MODULE 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.

• Disconnect the passenger-side side air bag 

module connector.

• Is there any malfunction of the passenger-

side side air bag module connector?

Yes

Replace the air bag wiring harness.

No

Go to the next step.

3

VERIFY WHETHER MALFUNCTION IS IN 
DRIVER-SIDE SIDE AIR BAG MODULE OR 
RELATED WIRING HARNESS

• Connect the leads of the SST (Fuel and 

thermometer checker) or apply 2-ohm 
resistance to passenger-side side air bag 
module connector terminals A and B.

• Set the resistance of the SST (Fuel and 

thermometer checker) to the 2-ohm 
position.

• Connect the negative battery cable.

• Turn the ignition switch to the ON position.

• Are DTCs B1996, B1997, B1998, and/or 

B1999 indicated?

Yes

Replace the air bag wiring harness, then go to the next 
step.

No

Replace the passenger-side side air bag module.
(See 08-10-8 SIDE AIR BAG MODULE REMOVAL/
INSTALLATION.)

4

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 passenger-side side air bag 

module connector.

• Turn the ignition switch to the ON position.

• Are DTCs B1996, B1997, B1998, and/or 

B1999 indicated?

Yes

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

No

DTC troubleshooting completed.

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ON-BOARD DIAGNOSTIC 

08-02–32

DTC B2228, B2230, B2232, B2234

id080200802100

DTC

B2228

Driver-side air bag module (inflator No.2) circuit short to body ground

B2230

Driver-side air bag module (inflator No.2) circuit short to power supply

B2232

Driver-side air bag module (inflator No.2) circuit resistance high

B2234

Driver-side air bag module (inflator No.2) circuit resistance low

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.

• Abnormal resistance (other than 1.5— 4.4 ohms) detected in the driver-side air bag module (inflator 

No.2) circuit

• Malfunction in the wiring harness between the driver-side air bag module (inflator No.2) and SAS 

control module

POSSIBLE 

CAUSE

• Open or short circuit in the wiring harness between the clock spring and SAS control module

• Clock spring malfunction

• Driver-side air bag module (inflator No.2) malfunction

• SAS control module malfunction

1V 1S 1P 1M 1J

1G 1D

1D 1C 1B 1A

3A

3B

4A

4B

1A

1B

1E

1H

1C

1F

1I

1Q

1T

1W

1R

1U

1X

SAS CONTROL MODULE WIRING 

HARNESS-SIDE CONNECTOR

CLOCK SPRING WIRING 

HARNESS-SIDE CONNECTOR

DRIVER-SIDE AIR BAG MODULE 

WIRING HARNESS-SIDE CONNECTOR 

(CLOCK SPRING )

(INFLATOR NO.1)

(INFLATOR NO.2)

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ON-BOARD DIAGNOSTIC 

08-02–33

08-02

Diagnostic procedure

STEP

INSPECTION

ACTION

1

INSPECT DRIVER-SIDE AIR BAG MODULE 
(INFLATOR NO.1)

• Using the M-MDS, verify the following PID/

DATA monitor. (See 08-02-8 PID/DATA 
MONITOR TABLE.)
— RES_AB2_D

• Is the resistance of the driver-side air bag 

module normal?
— Resistance: 1.5— 4.4 ohms

Yes

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

No

Go to the next step.

2

INSPECT DRIVER-SIDE AIR BAG MODULE 
CONNECTOR (CLOCK SPRING)

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 driver-side air bag module.

(See 08-10-6 DRIVER-SIDE AIR BAG 
MODULE REMOVAL/INSTALLATION.)

• Is there any malfunction of the driver-side air 

bag module connector?

Yes

Replace the air bag wiring harness.

No

Go to the next step.

3

VERIFY WHETHER MALFUNCTION IS IN 
DRIVER-SIDE AIR BAG MODULE (INFLATOR 
NO.1) OR RELATED WIRING HARNESS

• Connect the leads of the SST (Fuel and 

thermometer checker) or apply 2-ohm 
resistance to driver-side air bag module 
(inflator No.1) connector terminals 3A and 
3B, and driver-side air bag module (inflator 
No.2) connector terminals 4A and 4B.

• Set the resistance of the SST (Fuel and 

thermometer checker) to the 2-ohm 
position.

• Connect the negative battery cable.

• Turn the ignition switch to the ON position.

• Are DTCs B2228, B2230, B2232 and/or 

B2234 indicated?

Yes

Go to the next step.

No

Replace the driver-side air bag module.
(See 08-10-6 DRIVER-SIDE AIR BAG MODULE 
REMOVAL/INSTALLATION.)

4

INSPECT CLOCK SPRING

• Inspect the clock spring.

(See 08-10-16 CLOCK SPRING 
INSPECTION.)

• Is the clock spring normal?

Yes

Go to the next step.

No

Replace the clock spring.
(See 08-10-15 CLOCK SPRING REMOVAL/
INSTALLATION.)

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ON-BOARD DIAGNOSTIC 

08-02–34

End Of Sie

5

INSPECT WIRING HARNESS BETWEEN 
CLOCK SPRING 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.

• Inspect the wiring harness between SAS 

control module terminal 1G and clock spring 
terminal 1B, SAS control module terminal 1J 
and clock spring terminal 1A for the 
following: 

— Short to ground

— Short to power supply

— Open circuit

• Is the wiring harness normal?

Yes

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

No

Replace the air bag wiring harness.

STEP

INSPECTION

ACTION

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