Mazda CX-9 Grand Touring. Manual — part 13

2



Turn the ignition switch to the LOCK position.



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



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



Is there any malfunction of the passenger-side
curtain air bag module connector?



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
WARNINGS .)

(See AIR BAG SYSTEM SERVICE
CAUTIONS .)

Yes Replace the air bag wiring harness.

No

Go to the next step.

3

VERIFY WHETHER MALFUNCTION IS IN
PASSENGER-SIDE CURTAIN 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 curtain 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 B1056, B2777, B2778, B2779 and/or
B2780 indicated?

Yes Go to the next step.

No

Replace the passenger-side curtain air

bag module.

(See CURTAIN AIR BAG

MODULE

REMOVAL/INSTALLATION .)

INSPECT WIRING HARNESS BETWEEN
PASSENGER-SIDE CURTAIN AIR BAG
MODULE 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 .)

2008 Mazda CX-9 Grand Touring

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

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

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DTC B1057, B1916, B1932, B1934, B1936

DTC B1057, B1916, B1932, B1934, B1936 DETECTION CONDITION AND POSSIBLE CAUSE

4



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-side curtain air bag
module connector. (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 .)



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



Inspect the wiring harness between SAS control
module terminal 2AL and passenger-side curtain
air bag module terminal A, SAS control module
terminal 2AH and passenger-side curtain air bag
module terminal B for the following:



Short to ground



Short to power supply



Open circuit



Is the wiring harness normal?

Yes

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

No

Replace the air bag wiring harness.

DTC

B1057 Driver-side air bag module (inflator No.1) and other air bag module circuits short
B1916 Driver-side air bag module (inflator No.1) circuit short to power supply
B1932 Driver-side air bag module (inflator No.1) circuit resistance high
B1934 Driver-side air bag module (inflator No.1) circuit resistance low

2008 Mazda CX-9 Grand Touring

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

Microsoft

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

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© 2005 Mitchell Repair Information Company, LLC.

DIAGNOSTIC PROCEDURE

DTC B1057, B1916, B1932, B1934, B1936 DIAGNOSTIC PROCEDURE

B1936 Driver-side air bag module (inflator No.1) circuit short to body ground

DETECTION

CONDITION



Resistance other than 1.5-9.7 ohms detected in driver-side air bag module (inflator
No.1) circuit



Malfunction in wiring harness between driver-side air bag module (inflator No.1) and
SAS control module

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.

POSSIBLE

CAUSE



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



Clock spring malfunction



Driver-side air bag module malfunction



SAS control module malfunction

STEP

INSPECTION

ACTION

1

INSPECT DRIVER-SIDE AIR BAG MODULE



Using the M-MDS, verify the following
PID/DATA monitor.

(See PID/DATA MONITOR TABLE.)



RES_AB_D



Is the resistance of the driver-side air bag
module (inflator No.1) normal?



Resistance: 1.5-9.7 ohms

Yes

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

No

Go to the next step.

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 51

© 2005 Mitchell Repair Information Company, LLC.

2

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



Turn the ignition switch to the LOCK position.



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



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



Is there any malfunction of the driver-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 AIR BAG SYSTEM SERVICE
WARNINGS .)

(See AIR BAG SYSTEM SERVICE
CAUTIONS .)

Yes

Replace the air bag wiring harness
and/or clock spring.

No

Go to the next step.

3

VERIFY WHETHER MALFUNCTION IS IN
DRIVER-SIDE AIR BAG MODULE 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 B1057, B1916, B1932, B1934 and/or
B1936?

Yes Go to the next step.

No

Replace the driver-side air bag

module.

(See DRIVER-SIDE AIR BAG

MODULE

REMOVAL/INSTALLATION .)

INSPECT CLOCK SPRING



Inspect the clock spring.

Yes Go to the next step.

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 52

© 2005 Mitchell Repair Information Company, LLC.