Mazda CX-9 Grand Touring. Manual — part 9



Turn the ignition switch to the LOCK position.



Disconnect the negative battery cable and wait
for 1 min or more.



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?

(See AIR BAG SYSTEM SERVICE
CAUTIONS .)

No

Go to the next step.

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 COLUMN
COVER REMOVAL/INSTALLATION .)



Disconnect the clock spring connector. (See
COMBINATION SWITCH
REMOVAL/INSTALLATION .)



Remove the glove compartment. (See GLOVE
COMPARTMENT
REMOVAL/INSTALLATION .)



Disconnect the passenger-side air bag module
connector. (See PASSENGER-SIDE AIR
BAG MODULE
REMOVAL/INSTALLATION .)



Disconnect the driver and passenger-side front
seat connectors. (See FRONT SEAT
REMOVAL/INSTALLATION .)



Disconnect the driver and passenger-side curtain
air bag module connectors. (See CURTAIN
AIR BAG MODULE
REMOVAL/INSTALLATION .)



Remove the B-pillar lower trim. (See B-
PILLAR LOWER TRIM
REMOVAL/INSTALLATION .)



Disconnect the driver and passenger-side pre-
tensioner seat belt connectors. (See FRONT
SEAT BELT
REMOVAL/INSTALLATION .)

Yes

Replace the driver-side side air bag
sensor No.1, then go to the next step.
(See SIDE AIR BAG SENSOR NO.
1 REMOVAL/INSTALLATION .)

2008 Mazda CX-9 Grand Touring

2008 RESTRAINTS On-Board Diagnostic (Restraints) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:18:46 AM

Page 33

© 2005 Mitchell Repair Information Company, LLC.

DTC B104C, B104F, B1050, U2018

DTC B104C, B104F, B1050, U2018 DETECTION CONDITION AND POSSIBLE CAUSE



Disconnect the SAS control module connectors.
(See SAS CONTROL MODULE
REMOVAL/INSTALLATION .)



Disconnect the driver-side side air bag sensor
No.1 connector.



Inspect the wiring harnesses between SAS
control module terminal 20 and driver-side side
air bag sensor No.1 terminal A, SAS control
module terminal 2S and driver-side side air bag
sensor No.1 terminal B for the following:



Short to ground



Short to power supply



Open circuit



Is the wiring harness normal?

No

Replace the air bag wiring harness.

3

INSPECT SAS CONTROL MODULE



Connect the SAS control module connector.



Connect the driver and passenger-side pre-
tensioner seat belt connectors.



Connect the driver-side side air bag sensor No.1
connector.



Connect the driver and passenger-side curtain
air bag module connectors.



Connect the driver and passenger-side front seat
connectors.



Connect the passenger-side air bag module
connector.



Connect the clock spring connector.



Connect the negative battery cable.



Turn the ignition switch to the ON position.



Are DTCs B104B, B104E, B1051 and/or U2017
indicated?

Yes

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

No

DTC troubleshooting completed.

DTC

B104C Passenger-side side air bag sensor No.1 and other sensor circuits short to power supply

B104F Passenger-side side air bag sensor No.1 (internal circuit abnormal)

B1050

Passenger-side side air bag sensor No.1 circuit open or short

U2018

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

WARNING:

2008 Mazda CX-9 Grand Touring

2008 RESTRAINTS On-Board Diagnostic (Restraints) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:18:46 AM

Page 34

© 2005 Mitchell Repair Information Company, LLC.

DIAGNOSTIC PROCEDURE

DTC B104C, B104F, B1050, U2018 DIAGNOSTIC PROCEDURE

DETECTION

CONDITION



Malfunction in wiring harness between passenger-side side air bag sensor No.1 and
SAS control module



Malfunction in passenger-side side air bag sensor No.1 circuit



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.

POSSIBLE

CAUSE



Open or short circuit in wiring harness between passenger-side side air bag sensor

No.1 and SAS control module



Passenger-side side air bag sensor No.1 malfunction



SAS control module malfunction

STEP

INSPECTION

ACTION

INSPECT PASSENGER-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 AIR BAG SYSTEM SERVICE

Yes Replace the air bag wiring harness.

2008 Mazda CX-9 Grand Touring

2008 RESTRAINTS On-Board Diagnostic (Restraints) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:18:46 AM

Page 35

© 2005 Mitchell Repair Information Company, LLC.

1



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 (RH). (See B-
PILLAR LOWER TRIM
REMOVAL/INSTALLATION .)



Disconnect the passenger-side side air bag
sensor No.1 connector. (See SIDE AIR BAG
SENSOR NO. 1
REMOVAL/INSTALLATION .)



Is there any malfunction of the passenger-side
side air bag sensor No.1 connector?

WARNINGS .)

(See AIR BAG SYSTEM SERVICE
CAUTIONS .)

No

Go to the next step.

2

INSPECT WIRING HARNESS BETWEEN
PASSENGER-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 COLUMN
COVER REMOVAL/INSTALLATION .)



Disconnect the clock spring connector. (See
COMBINATION SWITCH
REMOVAL/INSTALLATION .)



Remove the glove compartment. (See GLOVE
COMPARTMENT
REMOVAL/INSTALLATION .)



Disconnect the passenger-side air bag module
connector. (See PASSENGER-SIDE AIR
BAG MODULE
REMOVAL/INSTALLATION .)



Disconnect the driver and passenger-side front
seat connectors. (See FRONT SEAT
REMOVAL/INSTALLATION .)



Disconnect the driver and passenger-side curtain
air bag module connectors. (See CURTAIN
AIR BAG MODULE
REMOVAL/INSTALLATION .)

Yes

Replace the passenger-side side air bag
sensor No.1, then go to the next step.
(See SIDE AIR BAG SENSOR NO.
1 REMOVAL/INSTALLATION .)

2008 Mazda CX-9 Grand Touring

2008 RESTRAINTS On-Board Diagnostic (Restraints) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 10:18:46 AM

Page 36

© 2005 Mitchell Repair Information Company, LLC.