DTC B1881, B1882, B1883, B1886 [AIR BAG SYSTEM]

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System Malfunction Location

DTC | System Malfunction Location
--- | ---
M-MDS display
B1881 | Passenger-side pre-tensioner seat belt circuit open circuit or 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 1.3–4.7 ohms detected in passenger-side pre-tensioner seat belt circuit
• Wiring harness between the passenger-side pre-tensioner seat belt and SAS control module has a malfunction

Possible Causes

• Passenger-side pre-tensioner seat belt connector malfunction
• Open or short circuit in the wiring harness between the passenger-side pre-tensioner seat belt and SAS control module
• Passenger-side pre-tensioner seat belt malfunction
• SAS control module malfunction

System Wiring Diagram

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Diagnostic Procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT PASSENGER-SIDE PRE-TENSIONER SEAT BELT CONNECTOR Warning • Handling the component parts improperly can accidentally operate (deploy) the air bag module, which may seriously injure you. Read the service warnings/cautions and the workshop manual before handling the air bag system components. (See AIR BAG SYSTEM SERVICE WARNINGS.) (See AIR BAG SYSTEM SERVICE CAUTIONS.) • Turn the ignition switch to the LOCK position. • Remove the battery cover. • Disconnect the negative battery cable and wait for 1 min or more. (See BATTERY REMOVAL/INSTALLATION [L8, LF].) • Remove the back trim. (See BACK TRIM REMOVAL/INSTALLATION.) • Disconnect the passenger-side pre-tensioner seat belt connector. • Inspect the passenger-side pre-tensioner seat belt connector. (Corrosion, damage, and disconnected pins) • Is there any malfunction of the passenger-side pre-tensioner seat belt connector? | Yes | Replace the passenger-side pre-tensioner seat belt wiring harness.
No | Go to the next step.
2 | INSPECT WIRING HARNESS BETWEEN SAS CONTROL MODULE AND PASSENGER-SIDE PRE-TENSIONER SEAT BELT • Remove the column cover. (See COLUMN COVER REMOVAL/INSTALLATION.) • Disconnect the clock spring connector. (See CLOCK SPRING REMOVAL/INSTALLATION.) • Remove the glove compartment. (See GLOVE COMPARTMENT REMOVAL/INSTALLATION.) • Disconnect the passenger-side air bag module connector. (See PASSENGER-SIDE AIR BAG MODULE REMOVAL/INSTALLATION.) • Disconnect the driver and passenger-side seat connectors. (See SEAT REMOVAL/INSTALLATION.) • Remove the driver-side pre-tensioner seat belt connectors. (See SEAT BELT REMOVAL/INSTALLATION.) • Remove the console panel. (See CONSOLE PANEL REMOVAL/INSTALLATION.) • Disconnect the SAS control module connectors. (See SAS CONTROL MODULE REMOVAL/INSTALLATION.) • Inspect the wiring harnesses between SAS control module connector terminal 2V and passenger-side pre-tensioner seat belt connector terminal A, and SAS control module connector terminal 2Y and passenger-side pre-tensioner seat belt connector terminal B for the following: ― Short circuit between terminals ― Short to body ground ― Open circuit Note • Inspect for continuity while shaking the wiring harness between the SAS control module and passenger-side pre-tensioner seat belt. • Is the wiring harness normal? | Yes | Go to the next step.
No | Replace the wiring harness between the SAS control module and the passenger-side pre-tensioner seat belt.
3 | INSPECT THE WIRING HARNESS BETWEEN THE SAS CONTROL MODULE AND PASSENGER-SIDE PRE-TENSIONER SEAT BELT FOR A SHORT CIRCUIT TO THE POWER SUPPLY • Connect the negative battery cable. • Turn the ignition switch to the ON position with SAS control module connector and passenger-side pre-tensioner seat belt connector disconnected. • Measure the voltage of SAS control module connector terminals 2Y and 2V of SAS control module harness side connector. Note • Measure the voltage while shaking the wiring harness between the SAS control module and passenger-side pre-tensioner seat belt. • Is the voltage measured? | Yes | Replace the wiring harness between the SAS control module and the passenger-side pre-tensioner seat belt.
No | Go to the next step.
4 | INSPECT PASSENGER-SIDE PRE-TENSIONER SEAT BELT • Connect the SST (Fuel and thermometer checker) or apply 2 ohms resistance to the passenger-side pre-tensioner seat belt connector terminals A and B. • Set the SST (Fuel and thermometer checker) to 2 ohms. • Except for the passenger-side pre-tensioner seat belt connector, reconnect all disconnected connectors. • Connect the negative battery cable. • Turn the ignition switch to the ON position. • Clear the DTC for the SAS control module using the M-MDS. (See CLEARING DTC [AIR BAG SYSTEM].) • Perform the DTC inspection for the SAS control module using the M-MDS. • (See DTC INSPECTION [AIR BAG SYSTEM].) • Are the same DTCs present? | Yes | Go to the next step.
No | Replace the passenger-side pre-tensioner seat belt. (See SEAT BELT REMOVAL/INSTALLATION.)
5 | PERFORM SAS CONTROL MODULE DTC INSPECTION • Turn the ignition switch to the LOCK position. • Disconnect the negative battery cable and wait for 1min or more. • Disconnect the SST (Fuel and thermometer checker) or the 2 ohms resistance. • Connect the passenger-side pre-tensioner seat belt connector. • Connect the negative battery cable. • Turn the ignition switch to the ON position. • Clear the DTC for the SAS control module using the M-MDS. (See CLEARING DTC [AIR BAG SYSTEM].) • Perform the DTC inspection for the SAS control module using the M-MDS. (See DTC INSPECTION [AIR BAG SYSTEM].) • Are the same DTCs present? | Yes | Replace the SAS control module. (See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
No | DTC troubleshooting completed.