Mazda CX-7 2007 Workshop Manual page 1220

DTC B1868
DTC B1868 Air bag warning system light malfunction
Warning
• Detection conditions are for understanding the DTC outline before performing an inspection.
Performing an inspection with only detection conditions may cause injury due to an
DETECTION
operating error, or damage the system. When performing an inspection, always follow the
CONDITION
inspection procedure.
• Air bag warning system light malfunction.
Diagnostic procedure
INSPECT INSTRUMENT CLUSTER
Peform the "INSTRUMENT CLUSTER INPUT/OUTPUT CHECK MODE".
(See 09-22-5 INSTRUMENT CLUSTER INPUT/OUTPUT CHECK MODE.)
End Of Sie
DTC B1877, B1878, B1879, B1885
B1877 Driver-side pre-tensioner seat belt circuit resistance high
B1878 Driver-side pre-tensioner seat belt circuit short to power supply
DTC
B1879 Driver-side pre-tensioner seat belt circuit short to body ground
B1885 Driver-side pre-tensioner seat belt circuit resistance low
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
DETECTION
inspection procedure.
CONDITION
• Abnormal resistance (other than 1.5— 3.7 ohms) detected in the driver-side pre-tensioner seat belt
circuit
• Malfunction in the wiring harness between the driver-side pre-tensioner seat belt and SAS control
module
• Open or short circuit in the wiring harness between the driver-side pre-tensioner seat belt and SAS
POSSIBLE control module
• Driver-side pre-tensioner seat belt malfunction
CAUSE
• SAS control module malfunction
Diagnostic procedure
STEP
1 INSPECT DRIVER-SIDE PRE-TENSIONER
SEAT BELT
• Using the M-MDS, verify the following PID/
DATA monitor.
(See 08-02-8 PID/DATA MONITOR TABLE.)
— RES_PT_D
• Is driver-side pre-tensioner seat belt
resistance normal?
— Resistance: 1.53.7 ohms
08-02–18
ON-BOARD DIAGNOSTIC
DRIVER-SIDE PRE-TENSIONER SEAT BELT
WIRING HARNESS-SIDE
INSPECTION
ACTION
CONNECTOR
B A
Yes Replace the SAS control module. (See 08-10-10 SAS
CONTROL MODULE REMOVAL/INSTALLATION.)
No Go to the next step.
id080200815000
id080200801400
ACTION