Mazda CX-7 2007 Workshop Manual page 1239

DTC B2290
DTC B2290 Passenger sensing system malfunction
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
DETECTION
an operating error, or damage the system. When performing an inspection, always follow the
CONDITION
inspection procedure.
• Passenger sensing system circuit malfunction
• Seat weight sensor calibration not properly set
• Communication error between SAS control module and seat weight sensor control module
POSSIBLE
• Seat weight sensor control module internal malfunction
CAUSE
• LH or RH seat weight sensor malfunction
SAS CONTROL MODULE WIRING
HARNESS-SIDE CONNECTOR
1V 1S 1P 1M 1J 1G 1D 1A
1W 1T 1Q
1X 1U 1R
STEP
1 INSPECT SEAT WEIGHT SENSOR CONTROL
MODULE CONNECTOR
Warning
• Handling the air bag system
components improperly can
accidentally operate (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.
• Disconnect the seat weight sensor control
module connector.
• Is there any malfunction of the seat weight
sensor control module connector?
2 INSPECTION WIRING HARNESS
• Disconnect the SAS control module
connector.
• Verify continuity in the following wiring
harnesses:
— Between SAS control module terminal 1I and
seat weight sensor control module terminal
3D
— Between the battery and seat weight sensor
control module terminal 3A
— Between seat weight sensor control module
terminal 3B and body ground
• Is the continuity normal?
ON-BOARD DIAGNOSTIC
1H 1E 1B
1I 1F 1C
INSPECTION
SEAT WEIGHT SENSOR CONTROL MODULE
WIRING HARNESS-SIDE CONNECTOR
3A
* *
3D 3B
*
Yes Repair or replace the wiring harness.
After replacement, reperform the DTC inspection and
verify that no DTCs are displayed.
No Go to the next step.
Yes Go to the next step.
No If there is any malfunction in the wiring harnesses, repair
or replace the applicable wiring harness.
After replacement, reperform the DTC inspection and
verify that no DTCs are displayed.
id080200802300
ACTION
08-02–37
08-02