Mazda CX 7. Manual — part 310

ON-BOARD DIAGNOSTIC

08-02–35

08-02

DTC B2229, B2231, B2233, B2235

id080200802200

DTC

B2229

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

B2231

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

B2233

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

B2235

Passenger-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 1.4— 3.9 ohms) detected in the passenger-side air bag module

(inflator No.2) circuit

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

control module

POSSIBLE

CAUSE

• Open or short circuit in the wiring harness between the passenger-side air bag module (inflator No.2)

and SAS control module

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

• SAS control module malfunction

A

B

A

B

PASSENGER-SIDE AIR BAG MODULE

WIRING HARNESS-SIDE CONNECTOR

(INFLATOR NO.1)

(INFLATOR NO.2)

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ON-BOARD DIAGNOSTIC

08-02–36

Diagnostic procedure

End Of Sie

STEP

INSPECTION

ACTION

1

INSPECT PASSENGER-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_P

• Is the resistance of the passenger-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 PASSENGER-SIDE AIR BAG
MODULE (INFLATOR 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 glove compartment.

(See 09-17-8 GLOVE COMPARTMENT
REMOVAL/INSTALLATION.)

• Disconnect the passenger-side air bag

module connector.

• Is there any malfunction of the passenger-

side air bag module connector?

Yes

Replace the air bag wiring harness.

No

Go to the next step.

3

VERIFY WHETHER MALFUNCTION IS IN
PASSENGER-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 passenger-side air bag module
(inflator No.1) connector terminals A and B,
and passenger-side air bag module (inflator
No.2) 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 B2229, B2231, B2233 and/or

B2235 indicated?

Yes

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

No

Replace the passenger-side air bag module.
(See 08-10-7 PASSENGER-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 air bag module

connector.

• Turn the ignition switch to the ON position.

• Are DTCs B2229, B2231, B2233 and/or

B2235 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

08-02–37

08-02

DTC B2290

id080200802300

DTC B2290

Passenger sensing system malfunction

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.

• Passenger sensing system circuit malfunction

POSSIBLE

CAUSE

• Seat weight sensor calibration not properly set

• Communication error between SAS control module and seat weight sensor control module

• Seat weight sensor control module internal malfunction

• LH or RH seat weight sensor malfunction

STEP

INSPECTION

ACTION

1

INSPECT SEAT WEIGHT SENSOR CONTROL
MODULE CONNECTOR

Warning
• Handling the air bag system

components improperly can
accidentally operate (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 seat weight sensor control

module connector.

• Is there any malfunction of the seat weight

sensor control module connector?

Yes

Repair or replace the wiring harness.
After replacement, reperform the DTC inspection and
verify that no DTCs are displayed.

No

Go to the next step.

2

INSPECTION WIRING HARNESS

• Disconnect the SAS control module

connector.

• Verify continuity in the following wiring

harnesses:

— Between SAS control module terminal 1I and

seat weight sensor control module terminal
3D

— Between the battery and seat weight sensor

control module terminal 3A

— Between seat weight sensor control module

terminal 3B and body ground

• Is the continuity normal?

Yes

Go to the next step.

No

If there is any malfunction in the wiring harnesses, repair
or replace the applicable wiring harness.
After replacement, reperform the DTC inspection and
verify that no DTCs are displayed.

3A

3B

*

3D

*

*

SAS CONTROL MODULE WIRING

HARNESS-SIDE CONNECTOR

SEAT WEIGHT SENSOR CONTROL MODULE

WIRING HARNESS-SIDE CONNECTOR

1V 1S 1P 1M 1J

1G 1D 1A

1B

1E

1H

1C

1F

1I

1Q

1T

1W

1R

1U

1X

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ON-BOARD DIAGNOSTIC

08-02–38

End Of Sie

DTC B2296

id080200802400

3

INSPECT PASSENGER SENSING SYSTEM

• Connect the seat weight sensor control

module connector.

• Connect the SAS control module.

• Connect the negative battery cable.

• Verify the following PIDs using the M-MDS.

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

— OCSFLT_COM

— OCSFLT_L

— OCSFLT_MDL

— OCSFLT_R

• Do all PIDs display “OK”?

Yes

Go to the next step.

No

Replace the following parts according to the M-MDS
screen:

• If OCSFLT_CAL is displayed:

— Perform seat weight sensor calibration (See 08-10-

12 SEAT WEIGHT SENSOR CALIBRATION.)

• If OCSFLT_COM or OCSFLT_MDL is displayed:

— Seat weight sensor control module (See 08-10-11

SEAT WEIGHT SENSOR CONTROL MODULE
REMOVAL/INSTALLATION.)

• If OCSFLT_L is displayed:

— Seat weight sensor (LH) (See: 09-13-2 FRONT

SEAT DISASSEMBLY/ASSEMBLY.)

• If OCSFLT_R is displayed:

— Seat weight sensor (RH) (See 09-13-2 FRONT

SEAT DISASSEMBLY/ASSEMBLY.)

4

INSPECT SAS CONTROL MODULE

• Reperform the DTC inspection.

• Is DTC B2290 indicated?

Yes

[Present malfunction diangnosis]

• Replace the SAS control module.

(See 08-10-10 SAS CONTROL MODULE REMOVAL/
INSTALLATION.)

[Past malfunction diagnosis]

• DTC troubleshooting completed.

No

DTC troubleshooting completed.

STEP

INSPECTION

ACTION

DTC B2296

Crash zone sensor (communication error, internal circuit abnormal)

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 crash zone sensor and SAS control module

• Malfunction in the crash zone sensor circuit

POSSIBLE

CAUSE

• Open or short circuit in the wiring harness between the crash zone sensor and SAS control module

• SAS control module malfunction

• Crash zone sensor malfunction

A

B

1A

1B

1C

1D

1E

1F

1G

1H

1I

1J

1M

1P

1Q

1R

1S

1T

1U

1V

1W

1X

SAS CONTROL MODULE WIRING

HARNESS-SIDE CONNECTOR

CRASH ZONE SENSOR WIRING

HARNESS-SIDE CONNECTOR

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