DTC B1925, B1933, B1935, B1938

id080200810300

DTC

B1925

Passenger-side air bag module circuit short to power supply

B1933

Passenger-side air bag module circuit 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 wiring harness between passenger-side air bag module and SAS control module
POSSIBLE CAUSE
•  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

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.
•  Turn the ignition switch to the LOCK position.
•  Remove the battery cover.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Remove the glove compartment.
•  Disconnect the passenger-side air bag module connector.
•  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.
•  Disconnect the clock spring connector.
•  Disconnect the driver and passenger-side seat connectors.
•  Remove the back trim.
•  Remove the driver and passenger-side pre-tensioner seat belt connectors.
•  Remove the console panel.
•  Disconnect the SAS control module connectors.
•  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 clock spring 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
•  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 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.
•  Perform the DTC inspection for the SAS control module using the M-MDS.
•  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.
•  Perform the DTC inspection for the SAS control module using the M-MDS.
•  Are the same DTCs present?
Yes
Replace the SAS control module.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
No
DTC troubleshooting completed.