DTC B1055, B1996, B1997, B1998, B1999 [AIR BAG SYSTEM]

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System Malfunction Location

DTC | System Malfunction Location
--- | ---
M-MDS display
B1055 | Passenger-side side air bag module assembly incorrect
B1996 | Passenger-side side air bag module circuit short to power supply
B1997 | Passenger-side side air bag module circuit short to body ground
B1998 | Passenger-side side air bag module circuit open circuit or resistance high
B1999 | Passenger-side side air bag module 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 side air bag module circuit
• Wiring harness between the passenger-side side air bag module and SAS control module has a malfunction

Possible Causes

• Passenger-side side air bag module connector malfunction
• Open or short circuit in the wiring harness between the passenger-side side air bag module and SAS control module
• Passenger-side side air bag module malfunction
• SAS control module malfunction

System Wiring Diagram

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Diagnostic Procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT PASSENGER-SIDE SIDE AIR BAG MODULE 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].) • Disconnect the passenger-side side air bag module connector. • Inspect the passenger-side side air bag module connection. (Corrosion, damage, and disconnected pins) • Is there any malfunction of the passenger-side side air bag module connector? | Yes | Replace the passenger-side side air bag module wiring harness.
No | Go to the next step.
2 | INSPECT WIRING HARNESS BETWEEN SAS CONTROL MODULE AND PASSENGER-SIDE SIDE AIR BAG MODULE • 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-side seat connectors. (See SEAT REMOVAL/INSTALLATION.) • Remove the back trim. (See BACK TRIM REMOVAL/INSTALLATION.) • Remove the driver and passenger-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 2P and passenger-side side air bag module connector terminal A, and SAS control module connector terminal 2S and passenger-side side air bag module 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 side air bag module. • 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 side air bag module.
3 | INSPECT THE WIRING HARNESS BETWEEN THE SAS CONTROL MODULE AND PASSENGER-SIDE SIDE AIR BAG MODULE 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 the passenger-side side air bag module disconnected. • Measure the voltage of SAS control module connector terminals 2P and 2S. Note • Measure the voltage while shaking the wiring harness between the SAS control module and passenger-side side air bag module. • Is the voltage measured? | Yes | Replace the wiring harness between the SAS control module and the passenger-side side air bag module.
No | Go to the next step.
4 | INSPECT PASSENGER-SIDE SIDE AIR BAG MODULE • Turn the ignition switch to the LOCK position. • Disconnect the negative battery cable and wait for 1min or more. • Connect the SST (Fuel and thermometer checker) or apply 2 ohms resistance to the passenger-side side air bag module connector terminals A and B. • Set the SST (Fuel and thermometer checker) to 2 ohms. • Except for the passenger-side side air bag module 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 side air bag module. (See SIDE AIR BAG MODULE 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 side air bag module 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.