Mazda CX 7. Manual — part 313
ON-BOARD DIAGNOSTIC
08-02–47
08-02
DTC B2777, B2778, B2779, B2780
id080200803000
DTC
B2777
Passenger-side curtain air bag module circuit resistance low
B2778
Passenger-side curtain air bag module circuit resistance high
B2779
Passenger-side curtain air bag module circuit short to body ground
B2780
Passenger-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.
• Abnormal resistance (other than 1.4— 3.9 ohms) detected in the passenger-side curtain air bag
module circuit
• Malfunction in the wiring harness between the passenger-side curtain air bag module and SAS control
module
POSSIBLE
CAUSE
• Open or short circuit in the wiring harness between the passenger-side curtain air bag module and SAS
control module
• Passenger-side curtain air bag module malfunction
• SAS control module malfunction
A
B
PASSENGER-SIDE CURTAIN AIR BAG MODULE
WIRING
HARNESS-SIDE
CONNECTOR
1871-1U-06B(08-02).fm 47 ページ 2006年3月15日 水曜日 午前11時33分
ON-BOARD DIAGNOSTIC
08-02–48
Diagnostic procedure
End Of Sie
STEP
INSPECTION
ACTION
1
INSPECT PASSENGER-SIDE CURTAIN AIR
BAG MODULE
• Using the M-MDS, verify the following PID/
DATA monitor.
(See 08-02-8 PID/DATA MONITOR TABLE.)
— RES_CAB_P
• Is the resistance of the passenger-side
curtain air bag module normal?
— Resistance: 1.4— 3.9 ohms
Yes
Replace the SAS control module.
(See 08-10-10 SAS CONTROL MODULE REMOVAL/
INSTALLATION.)
No
Go to the next step.
2
INSPECT DRIVER-SIDE CURTAIN 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 08-10-3 AIR BAG SYSTEM
SERVICE WARNINGS.)
(See 08-10-5 AIR BAG SYSTEM
SERVICE CAUTIONS.)
• Turn the ignition switch to the LOCK position.
• Disconnect the negative battery cable and
wait for 1 min or more.
• Remove the C-pillar trim. (See 09-17-17 C-
PILLAR TRIM REMOVAL/INSTALLATION.)
• Remove the D-pillar trim. (See 09-17-18 D-
PILLAR TRIM REMOVAL/INSTALLATION.)
• Disconnect the passenger-side curtain air
bag module connector.
• Is there any malfunction of the passenger-
side curtain air bag module connector?
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 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 B2777, B2778, B2779 and/or
B2780 indicated?
Yes
Replace the air bag wiring harness, then go to the next
step.
No
Replace the passenger-side curtain air bag module.
(See 08-10-8 CURTAIN AIR BAG MODULE REMOVAL/
INSTALLATION.)
4
INSPECT SAS CONTROL MODULE
• Turn the ignition switch to the LOCK position.
• Disconnect the negative battery cable and
wait for 1 min or more.
• Connect the passenger-side curtain air bag
module connector.
• Are DTCs B2777, B2778, B2779 and/or
B2780 indicated?
Yes
Replace the SAS control module.
(See 08-10-10 SAS CONTROL MODULE REMOVAL/
INSTALLATION.)
No
DTC troubleshooting completed.
1871-1U-06B(08-02).fm 48 ページ 2006年3月15日 水曜日 午前11時33分
ON-BOARD DIAGNOSTIC
08-02–49
08-02
DTC B2867
id080200803100
Diagnostic procedure
DTC B2867
Poor connection of any SAS control module connectors
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.
• There is no continuity between the poor connection detector bar terminals of the SAS control module.
POSSIBLE
CAUSE
• Poor connection of any SAS control module connectors
• Malfunction of any SAS control module connectors
• SAS control module malfunction
STEP
INSPECTION
ACTION
1
VERIFY THAT ALL SAS CONTROL MODULE
CONNECTORS ARE CONNECTED WITH SAS
CONTROL MODULE
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 08-10-3 AIR BAG SYSTEM
SERVICE WARNINGS.)
(See 08-10-5 AIR BAG SYSTEM
SERVICE CAUTIONS.)
• Turn the ignition switch to the LOCK position.
• Disconnect the negative battery cable and
wait for 1 min or more.
• Partially peel back the floor covering.
• Are all SAS control module connectors
securely connected?
Yes
Go to the next step.
No
Reconnect the connector properly.
2A
2B
2C
2D
2E
2F
2G
2H
2I
2J
2L
2M
2O
2P
2R
2S
2T
2U
2V
2W
2Y
2X
2Z
2AA
1A
1B
1C
1D
1E
1F
1G
1H
1I
1J
1M
1P
1Q
1R
1S
1T
1U
1V
1W
1X
SAS CONTROL MODULE WIRING
HARNESS-SIDE CONNECTOR
*
*
*
*
*
*
*
*
*
*
*
*
*
3T
3U
*
3W
3X
1871-1U-06B(08-02).fm 49 ページ 2006年3月15日 水曜日 午前11時33分
ON-BOARD DIAGNOSTIC
08-02–50
End Of Sie
DTC C1947, C1948, C1981
id080200803200
2
INSPECT ALL SAS CONTROL MODULE
CONNECTORS
• Remove the column cover. (See 09-17-8
COLUMN COVER REMOVAL/
INSTALLATION.)
• Disconnect the clock spring connector.
• Remove the glove compartment.(See 09-17-
8 GLOVE COMPARTMENT REMOVAL/
INSTALLATION.)
• Disconnect the passenger-side air bag
module connector.
• Disconnect the driver and passenger-side
seat connectors.
• Remove the C-pillar trim. (See 09-17-17 C-
PILLAR TRIM REMOVAL/INSTALLATION.)
• Remove the D-pillar trim. (See 09-17-18 D-
PILLAR TRIM REMOVAL/INSTALLATION.)
• Disconnect the driver and passenger-side
curtain air bag module connector.
• Remove the B-pillar lower trim. (See 09-17-
16 B-PILLAR LOWER TRIM REMOVAL/
INSTALLATION.)
• Disconnect the driver and passenger-side
pre-tensioner seat belt connectors.
• Remove the console. (See 09-17-13
CONSOLE REMOVAL/INSTALLATION.)
• Disconnect the SAS control module
connector.
• Are the poor connection detector bars of
SAS control module connectors normal?
Yes
Replace the SAS control module.
(See 08-10-10 SAS CONTROL MODULE REMOVAL/
INSTALLATION.)
No
Replace the air bag wiring harness.
STEP
INSPECTION
ACTION
DTC
C1947
Seat track position sensor circuit short to body ground
C1948
Seat track position sensor circuit resistance not within specification
C1981
Seat track position sensor circuit open or 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.
• Malfunction in seat track position sensor circuit.
POSSIBLE
CAUSE
• Malfunction of connector between seat track position sensor and SAS control module.
• Open or short circuit in wiring harness between seat track position sensor and SAS control module.
• Seat track position sensor malfunction
• SAS control module malfunction
2A
2B
2C
2D
2E
2F
2G
2H
2I
2J
2L
2M
2O
2P
2R
2S
2T
2U
2V
2W
2Y
2X
2Z
2AA
SAS CONTROL MODULE WIRING
HARNESS-SIDE CONNECTOR
SEAT TRACK POSITION SENSOR
WIRING HARNESS-SIDE CONNECTOR
A
*
C
*
1871-1U-06B(08-02).fm 50 ページ 2006年3月15日 水曜日 午前11時33分
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