DTC B1049, B1881, B1882, B1883, B1886

#
DTC B1049, B1881, B1882, B1883, B1886

B3E080201046W13

DTC | B1049 | Passenger-side pre-tensioner front buckle and other air bag module circuits short
--- | --- | ---
B1881 | Passenger-side pre-tensioner front buckle circuit resistance high
B1882 | Passenger-side pre-tensioner front buckle circuit short to power supply
B1883 | Passenger-side pre-tensioner front buckle circuit short to body ground
B1886 | Passenger-side pre-tensioner front buckle 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 front buckle circuit
• Malfunction in wiring harness between passenger-side pre-tensioner front buckle and SAS control module

POSSIBLE CAUSE | • Open or short circuit in wiring harness between passenger-side pre-tensioner front buckle and SAS control module • Passenger-side pre-tensioner front buckle malfunction • SAS control module malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---

1

INSPECT PASSENGER-SIDE PRE-TENSIONER FRONT BUCKLE
• Using the WDS or equivalent, verify the following PID/DATA monitor.
(See PID/DATA MONITOR TABLE.)

  - PS_PTENS

• Is the resistance of the passenger-side pre-tensioner front buckle 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 FRONT BUCKLE CONNECTOR

  Warning

  • Handling the air bag system components improperly can accidentally deploy the air bag modules and pre-tensioner front buckles, which may seriously injure you. Read the service warnings and cautions before handling the air bag system components.
  (See SERVICE WARNINGS.)
  (See SERVICE CAUTIONS.)

• 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 front buckle connector.
• Is there any malfunction of the passenger-side pre-tensioner front buckle connector?

Yes

Replace the air bag wiring harness.

No | Go to the next step.

3

VERIFY WHETHER MALFUNCTION IS IN PASSENGER-SIDE PRE-TENSIONER FRONT BUCKLE OR RELATED WIRING HARNESS
• Connect the leads of the SST (Fuel and thermometer checker) or apply 2-ohm resistance to passenger-side pre-tensioner front buckle 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 front buckle. (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 front buckle 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.