Mazda CX-9 Grand Touring. Manual — part 5

DIAGNOSTIC PROCEDURE

DTC B1013 DIAGNOSTIC PROCEDURE

CAUSE



Seat weight sensor deformed or malfunction



Seat weight sensor control module malfunction



SAS control module malfunction



Load to or deformation of the seat belt rail

STEP

INSPECTION

ACTION

1

INSPECT SEAT WEIGHT
SENSOR



Properly install the
passenger-side front seat.



Inspect the seat weight
sensor. (See SEAT
WEIGHT SENSOR
CALIBRATION .)



Is the seat weight sensor
normal?

Yes

[Present malfunction diagnosis]



Replace the SAS control module.

(See SAS CONTROL MODULE
REMOVAL/INSTALLATION .)

[Past malfunction diagnosis]



DTC troubleshooting completed.

No

Go to the next step.

2

INSPECT PASSENGER-SIDE
FRONT SEAT



Turn the ignition switch to
the LOCK position.



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



Remove the passenger-
side seat and visually
inspect for the following:



Seat under-bracket
deformation



Seat frame
deformation



Seat weight sensor
deformation



Foreign objects
stuck in seat



Are any of the parts
deformed or are any
foreign objects stuck in the

Yes

Replace any deformed parts or remove any foreign objects.



After replacement, perform seat weight sensor
calibration and reperform the DTC inspection. If the
DTC is displayed, go the next step. (See SEAT
WEIGHT SENSOR CALIBRATION .)

No

Go to the next step.

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DTC B1046, B2773, B2774, B2775, B2776

DTC B1046, B2773, B2774, B2775, B2776 DETECTION CONDITION AND POSSIBLE CAUSE

seat?

3

INSPECT FLOOR



Visually inspect the
installation parts of the
front passenger-side seat
for the following:



Abnormal floor
deformation



Installation hole of
front passenger-side
seat is improperly
positioned



Is the floor normal?

Yes Go to the next step.

No

Repair floor deformation.



After repair, perform seat weight sensor calibration

and reperform the DTC inspection. If the DTC is

displayed even though the floor has been repaired, go

the next step. (See SEAT WEIGHT SENSOR

CALIBRATION .)

4

INSPECT SEAT WEIGHT
SENSOR CONTROL
MODULE



Replace the seat weight
sensor.



After replacement,
perform seat weight sensor
calibration. (See SEAT
WEIGHT SENSOR
CALIBRATION .)



Reperform the DTC
inspection.



Is DTC B1013 indicated?

Yes

Replace the seat weight sensor control module. (See SEAT
WEIGHT SENSOR CONTROL MODULE
REMOVAL/INSTALLATION .)



After replacement, perform seat weight sensor
calibration and reperform the DTC inspection. If the
DTC is displayed even though the seat weight sensor
control module has been replaced, replace the SAS
control module. (See SAS CONTROL MODULE
REMOVAL/INSTALLATION .)

No

DTC troubleshooting completed.

DTC

B1046 Driver-side curtain air bag module and other air bag module circuits short
B2773 Driver-side curtain air bag module circuit resistance low
B2774 Driver-side curtain air bag module circuit resistance high
B2775 Driver-side curtain air bag module circuit short to body ground
B2776 Driver-side curtain air bag module circuit short to power supply

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.

2008 Mazda CX-9 Grand Touring

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

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DIAGNOSTIC PROCEDURE

DTC B1046, B2773, B2774, B2775, B2776 DIAGNOSTIC PROCEDURE



Resistance other than 1.0-9.7 ohms detected in driver-side curtain air bag module
circuit



Malfunction in wiring harness between driver-side curtain air bag module and SAS
control module

POSSIBLE

CAUSE



Open or short circuit in wiring harness between driver-side curtain air bag module and

SAS control module



Driver-side curtain air bag module malfunction



SAS control module malfunction

STEP

INSPECTION

ACTION

1

INSPECT DRIVER-SIDE CURTAIN AIR BAG
MODULE



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

(See PID/DATA MONITOR TABLE.)



RES_CAB_D



Is the resistance of the driver-side curtain 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.

INSPECT DRIVER-SIDE CURTAIN AIR BAG
MODULE CONNECTOR

WARNING:

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2



Turn the ignition switch to the LOCK position.



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



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



Is there any malfunction of the driver-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
DRIVER-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 driver-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 B1046, B2773, B2774, B2775
and/or B2776 indicated?

Yes Go to the next step.

No

Replace the driver-side curtain air bag

module. (See CURTAIN AIR BAG

MODULE

REMOVAL/INSTALLATION .)

INSPECT WIRING HARNESS BETWEEN
DRIVER-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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