DTC B1925, B1933, B1935, B1938 [AIR BAG SYSTEM]

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System Malfunction Location

DTC | System Malfunction Location
--- | ---
M-MDS display
B1925 | Passenger-side air bag module circuit short to power supply
B1933 | Passenger-side air bag module circuit open circuit or resistance high
B1935 | Passenger-side air bag module circuit resistance low
B1938 | Passenger-side air bag module circuit short to body ground

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 air bag module circuit
• Malfunction in the wiring harness between the passenger-side air bag module and SAS control module

Possible Causes

• Passenger-side air bag module connector malfunction
• Open or short circuit in the wiring harness between the passenger-side air bag module and the SAS control module
• Passenger-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 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. • Disconnect the negative battery cable and wait for 1 min or more. (See BATTERY REMOVAL/INSTALLATION [L8, LF].) • 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.) • Inspect the passenger-side air bag module connector. (Corrosion, damage, and disconnected pins) • Is there any malfunction of the passenger-side air bag module connector? | Yes | Replace the passenger-side air bag module wiring harness.
No | Go to the next step.
2 | INSPECT WIRING HARNESS BETWEEN SAS CONTROL MODULE AND PASSENGER-SIDE AIR BAG MODULE • Remove the column cover. (See COLUMN COVER REMOVAL/INSTALLATION.) • Disconnect the clock spring connector. (See CLOCK SPRING REMOVAL/INSTALLATION.) • Disconnect the driver and passenger-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 1S and passenger-side air bag module connector terminal A, and SAS control module connector terminal 1V and passenger-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 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 air bag module.
3 | INSPECT THE WIRING HARNESS BETWEEN THE SAS CONTROL MODULE AND PASSENGER-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 passenger-side air bag module connector disconnected. • Measure the voltage of SAS control module connector terminals 1S and 1V. Note • Measure the voltage while shaking the wiring harness between the SAS control module and passenger-side air bag module. • Is the voltage measured? | Yes | Replace the wiring harness between the SAS control module and the passenger-side air bag module.
No | Go to the next step.
4 | INSPECT PASSENGER-SIDE AIR BAG MODULE • Connect the SST (Fuel and thermometer checker) or apply 2 ohms resistance to the passenger-side air bag module connector terminals A and B. • Set the SST (fuel and thermometer checker) to 2 ohms. • Except for the passenger-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 air bag module. (See PASSENGER-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 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.