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DTC B1992, B1993, B1994, B1995

BHE080201046W17

DTC | B1992 | Driver-side side air bag module circuit short to power supply
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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 1.4-3.2 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 unit
POSSIBLE CAUSE | • Open or short circuit in the wiring harness between the driver-side side air bag module and SAS unit • Driver-side side air bag module malfunction • SAS unit malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | INSPECT DRIVER-SIDE SIDE AIR BAG MODULE • Using the WDS or equivalent, verify the following PID/DATA monitor. (See PID/DATA MONITOR TABLE.) – DS_AB • Is the resistance of the driver-side side air bag module normal? – Resistance: 1.4-3.2 ohms | Yes | [Present malfunction diagnosis] • Replace the SAS unit. (See SAS UNIT REMOVAL/INSTALLATION.) [Past malfunction diagnosis] • DTC troubleshooting completed.
No | Go to the next step.
2 | 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. (SeeSERVICE WARNINGS.) (SeeSERVICE CAUTIONS.) • 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.
3 | 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. • Using the WDS or equivalent, verify the following PID/DATA monitor. • (See PID/DATA MONITOR TABLE.) – OD_DSAB_ST • Are related wiring harnesses normal? | Yes | Replace the driver-side side air bag module. (See SIDE AIR BAG MODULE REMOVAL/INSTALLATION.)
No | Replace the air bag wiring harness, then go to the next step.
4 | INSPECT SAS UNIT • Turn the ignition switch to the LOCK position. • Disconnect the negative battery cable and wait for 1 min or more. • Connect the driver-side side air bag module connector. • Are DTCs B1992, B1993, B1994, and/or B1995 indicated? | Yes | [Present malfunction diagnosis] • Replace the SAS unit. (See SAS UNIT REMOVAL/INSTALLATION.) [Past malfunction diagnosis] • DTC troubleshooting completed.
No | DTC troubleshooting completed.