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

  

Microsoft 

 

Sunday, November 15, 2009 10:18:46 AM

Page 25 

© 2005 Mitchell Repair Information Company, LLC. 

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

  

Microsoft 

 

Sunday, November 15, 2009 10:18:46 AM

Page 26 

© 2005 Mitchell Repair Information Company, LLC. 

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

Page 27 

© 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.