Mazda CX-9 Grand Touring. Manual — part 7

DTC B1048, B1925, B1933, B1935, B1938

DTC B1048, B1925, B1933, B1935, B1938 DETECTION CONDITION AND POSSIBLE CAUSE

DIAGNOSTIC PROCEDURE



Open circuit



Is the wiring harness normal?

DTC

B1048 Passenger-side air bag module (inflator No.1) and other air bag module circuits short
B1925 Passenger-side air bag module (inflator No.1) circuit short to power supply
B1933 Passenger-side air bag module (inflator No.1) circuit resistance high
B1935 Passenger-side air bag module (inflator No.1) circuit resistance low
B1938 Passenger-side air bag module (inflator No.1) circuit short to body ground

DETECTION

CONDITION



Resistance other than 1.0-9.7 ohms detected in passenger-side air bag module circuit
(inflator No.1)



Malfunction in wiring harness between passenger-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 passenger-side air bag module

(inflator No.1) and SAS control module



Passenger-side air bag module malfunction



SAS control module malfunction

2008 Mazda CX-9 Grand Touring

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

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DTC B1048, B1925, B1933, B1935, B1938 DIAGNOSTIC PROCEDURE

STEP

INSPECTION

ACTION

1

INSPECT PASSENGER-SIDE AIR BAG
MODULE



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

(See PID/DATA MONITOR TABLE.)



RES_AB_P



Is the resistance of the passenger-side air bag
module normal?



Resistance: 1.0-9.7 ohms

Yes

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

No

Go to the next step.

2

INSPECT PASSENGER-SIDE AIR BAG
MODULE CONNECTOR



Turn the ignition switch to the LOCK position.



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



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



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

(See AIR BAG SYSTEM SERVICE
CAUTIONS .)

Yes Replace the air bag wiring harness.

No

Go to the next step.

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

Yes Go to the next step.

2008 Mazda CX-9 Grand Touring

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

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3



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 1A and 1B, and passenger-
side air bag module (inflator No.2) connector
terminals 2A and 2B.



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 B1048, B1925, B1933, B1935 and/or
B1938 indicated?

No

Replace the passenger-side air bag

module.

(See PASSENGER-SIDE AIR BAG

MODULE

REMOVAL/INSTALLATION .)

4

INSPECT WIRING HARNESS BETWEEN
PASSENGER-SIDE 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 .)



Disconnect the clock spring connector. (See
COMBINATION SWITCH
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 .)



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



Inspect the wiring harness between SAS control
module terminal 1J and passenger-side air bag

Yes

Replace the SAS control module. (See
SAS CONTROL MODULE
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

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© 2005 Mitchell Repair Information Company, LLC.

DTC B1049, B1881, B1882, B1883, B1886

DTC B1049, B1881, B1882, B1883, B1886 DETECTION CONDITION AND POSSIBLE CAUSE

module terminal 1 A, SAS control module
terminal 1N and passenger-side air bag module
terminal 1B for the following:



Short to ground



Short to power supply



Open circuit



Is the wiring harness normal?

No

Replace the air bag wiring harness.

DTC

B1049 Passenger-side pre-tensioner seat belt and other air bag module circuits short
B1881 Passenger-side pre-tensioner seat belt circuit resistance high
B1882 Passenger-side pre-tensioner seat belt circuit short to power supply
B1883 Passenger-side pre-tensioner seat belt circuit short to body ground
B1886 Passenger-side pre-tensioner seat belt circuit resistance low

DETECTION

CONDITION



Resistance other than 1.0-9.7 ohms detected in passenger-side pre-tensioner seat belt
circuit



Malfunction in wiring harness between passenger-side pre-tensioner seat belt 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 passenger-side pre-tensioner seat belt

and SAS control module



Passenger-side pre-tensioner seat belt malfunction



SAS control module malfunction

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 28

© 2005 Mitchell Repair Information Company, LLC.