DTC B1049, B1881, B1882, B1883, B1886

id080200810700

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
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.
•  Resistance other than 1.5—3.1 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
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

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT PASSENGER-SIDE PRE-TENSIONER SEAT BELT
•  Using the M-MDS, verify the following PID/DATA monitor.
―  PS_PTENS
•  Is the resistance of the passenger-side pre-tensioner seat belt normal?
―  Resistance: 1.5—3.1 ohms
Yes
Replace the SAS control module.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
No
Go to the next step.
2
INSPECT PASSENGER-SIDE PRE-TENSIONER SEAT BELT 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.
•  Turn the ignition switch to the LOCK position.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Disconnect the passenger-side pre-tensioner seat belt connector.
•  Is there any malfunction of the passenger-side pre-tensioner seat belt connector?
Yes
Replace the air bag wiring harness.
No
Go to the next step.
3
VERIFY WHETHER MALFUNCTION IS IN PASSENGER-SIDE PRE-TENSIONER SEAT BELT OR RELATED WIRING HARNESS
•  Connect the leads of the SST (Fuel and thermometer checker) or apply 2 ohm resistance to passenger-side pre-tensioner seat belt 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 B1049, B1881, B1882, B1883, and/or B1886 indicated?
Yes
Replace the air bag wiring harness, then go to the next step.
No
Replace the passenger-side pre-tensioner seat belt.
(See FRONT SEAT BELT 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 pre-tensioner seat belt connector.
•  Are DTCs B1049, B1881, B1882, B1883, and/or B1886 indicated?
Yes
Replace the SAS control module.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
No
DTC troubleshooting completed.