DTC B1992, B1993, B1994, B1995

id080200801900

DTC

B1992

Driver‐side side air bag module circuit short to power supply

B1993

Driver‐side side air bag module circuit short to body ground

B1994

Driver‐side side air bag module circuit resistance high

B1995

Driver‐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.
•  Abnormal resistance (other than 1.4—3.9 ohms) detected in the driver-side side air bag module circuit
•  Malfunction in the wiring harness between the driver-side side air bag module and SAS control module
POSSIBLE CAUSE
•  Driver-side side air bag module connector malfunction
•  Driver-side side air bag module malfunction
•  Open or short circuit in the wiring harness between the driver-side side air bag module and SAS control module
•  SAS control module malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT DRIVER‐SIDE SIDE AIR BAG MODULE CONNECTOR
Warning
•  Handling the air bag system components improperly can accidentally deploy the air bag modules and pre-tensioner seat belts, which may seriously injure you. Read the service warnings and cautions before handling the air bag system components.
•  Turn the ignition switch to the LOCK position.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Disconnect the driver-side side air bag module connector.
•  Is there any malfunction of the driver-side side air bag module connector?
Yes
Replace the air bag wiring harness.
No
Go to the next step.
2
VERIFY WHETHER MALFUNCTION IS IN DRIVER‐SIDE SIDE AIR BAG MODULE OR RELATED WIRING HARNESS
•  Connect the leads of the SST (Fuel and thermometer checker) or apply 2-ohm resistance to driver-side side air bag module 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 B1992, B1993, B1994, and/or B1995 indicated?
Yes
Go to the next step.
No
Replace the driver-side side air bag module.
(See SIDE AIR BAG MODULE REMOVAL/INSTALLATION.)
3
INSPECT WIRING HARNESS BETWEEN DRIVER‐SIDE SIDE AIR BAG MODULE AND SAS CONTROL MODULE
•  Turn the ignition switch to the LOCK position.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Remove the column cover. (See COLUMN COVER REMOVAL/INSTALLATION.)
•  Disconnect the driver-side air bag module connector.
•  Remove the glove compartment.(See GLOVE COMPARTMENT REMOVAL/INSTALLATION.)
•  Disconnect the passenger-side air bag module connector.
•  Disconnect the passenger-side seat connectors.
•  Disconnect the driver and passenger-side curtain air bag module connector.
•  Remove the B-pillar lower trim. (See B-PILLAR LOWER TRIM REMOVAL/INSTALLATION.)
•  Disconnect the driver and passenger-side pre-tensioner seat belt connectors.
•  Remove the console. (See CONSOLE REMOVAL/INSTALLATION.)
•  Disconnect the SAS control module connector.
•  Inspect the wiring harness between SAS control module connector terminal 2M and driver-side side air bag module connector terminal A, SAS control module connector terminal 2O and driver-side side air bag module connector terminal B for the following:
―  Short to ground
―  Open circuit
―  Short circuit between terminals
Note
•  Inspect for continuity while shaking the wiring harness between the SAS control module and driver-side side air bag module.
•  Is the wiring harness normal?
Yes
Go to the next step.
No
Replace the air bag wiring harness.
4
INSPECT THE WIRING HARNESS BETWEEN THE SAS CONTROL MODULE AND DRIVER‐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 and driver-side side air bag module connector disconnected.
•  Measure the voltage of SAS control module connector terminals 2M and 2O of SAS control module harness side connector.
Note
•  Measure the voltage while shaking the wiring harness between the SAS control module and driver-side side air bag module.
•  Is the voltage measured?
Yes
Replace the air bag wiring harness.
No
Go to the next step.
5
INSPECT DTCs
•  Turn the ignition switch to the LOCK position.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Reconnect all disconnected connectors.
•  Connect the negative battery cable.
•  Turn the ignition switch to the ON position.
•  Clear DTCs using the M-MDS.
•  Verify DTCs using the M-MDS.
•  Is DTC B1992, B1993, B1994, and/or B1995 displayed again?
Yes
Replace the SAS control module.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
No
DTC troubleshooting completed.